Page 1
Direct-Operated Pressure & Temperature
Regulating Valves
Temperature
Regulators
DIRECT-OPERATED
REGULATING VALVES
Pressure
Regulators
152
Relief Valves
428 Jones Boulevard • Limerick Airport Business Center • Pottstown PA • 19464 • Tel: 610-495-5131 • Fax: 610-495-5134
www.watsonmcdaniel.com
Page 2
Direct-Operated Pressure & Temperature
Regulating Valves
Direct-Operated Regulators are used for controlling pressure and temperature in a variety of applications.
PRESSURE REGULATORS
O Series 154-155
Cast Iron
3/8” – 2”
Pressure Regulating Valve - STEAM, Water, Air, Oil, other Liquids & Gases
The O Series, with Cast Iron body and Hardened Stainless internals, is our most popular and
economical solution for reducing pressure in STEAM systems. It is also suitable for Air, Water, Oil
as well as other Liquids and Gases.
B Series 156-157
ronze,
B
Cast Iron
1/2” – 4”
Pressure Regulating Valve - WATE R, Air, Oil, other Liquids & Gases
The B-Series is primarily used for reducing pressure in WATER systems. It is also suitable for Air, Oil,
as well as other Liquids and Gases. The B-Series offers higher capacity
455 Series 158-159
Bronze,
Cast Iron
1/2” – 4”
Pressure Regulating Valve - STEAM, Air, Water & other Gases
The 455 is ideally suited for reducing pressure in STEAM applications and requires only 5 PSIG
minimum inlet pressure. Excellent for use in steam systems that contain large amounts of scale
that may cause failure in pilot-operated regulators.
With a slight modification to the internal mechanism, the 455 can be used for Liquid systems.
402 & 403 Series 160-161
Ductile Iron
1/2” – 4”
Pressure Regulating Valve - STEAM &Air
The 402 & 403 are pilot-operated, piston-actuated, pressure regulators primarily used for reducing pressure
in STEAM systems. This regulator can be equipped with an optional internal sensing line which simplifies
installation.
Page No.
than the O-Series.
The 403 Series has all stainless steel internals for high-pressure applications up to 450 PSIG.
REGULATING VALVES
DIRECT-OPERATED
3
BACK PRESSURE-RELIEF VALVES
R Series & 10691 Series 162-163
Bronze
1/2” – 3”
Relief & Back Pressure Valves - Water, Liquids & Air
The R Series & 10691 Series are economically-priced Back Pressure Relief Valves for
Liquid service. Relief Valves/Back Pressure Valves are used to maintain a specific
back pressure or to protect systems from an over-pressure condition.
3040 Series 164-165
Bronze,
Cast Iron
1/2” – 2”
Relief & Back Pressure Valves - Water, Liquids & Air
The 3040 Back Pressure Relief Valve offers a much higher capacity than the R Series.
Used for Liquid service. Relief Valves protect systems from over-pressurized conditions.
TEMPERATURE REGULATING VALVES
W91 & W94 Series
Self-Operating Temperature Regulating Valves - Heating/Cooling
The W91/W94 Series Temperature Regulating Valves are used for controlling
temperatures in industrial and HVAC applications.
W91/W94 Design & Operation 166-170
Typical Applications 171
How to Order 172
Specifications & Options 173-183
166-183
Bronze, Cast Iron
1/2” – 4”
153
Page 3
REGULATORS
“
O”Series
Pressure Regulating Valve
Model “O” Series
Service Steam, Air, Water & Other Liquids
Sizes 3/8”, 1/2”, 3/4”, 1”, 11/4
Connections NPT
Body Material Cast Iron
Seat & Disc Hardened 420 Stainless Steel
Diaphragm Phosphor Bronze - Steam
Neoprene/Nylon (composition) - Water, Air & Oil (250˚F max)
Viton (optional)
Max. Inlet Pressure 250 PSIG
Min. Inlet Pressure 15 PSIG
Max. Diff. Pressure 125 PSI
Min. Diff. Pressure 15 PSI
DESIGN PRESSURE/TEMPERATURE RATING – PMA/TMA
NPT 250 PSIG @ 450˚F
TYPICAL APPLICATIONS
The “O” Series Pressure Regulating Valves are used for reducing
pressure in steam, air and water systems. Commonly used in
DIRECT-OPERATED
REGULATING VALVES
heating and other process applications.
HOW TO SIZE/ORDER
From the Capacity chart, find the inlet pressure and required
regulator outlet pressure. Follow across chart to nearest capacity of
application service medium that meets or slightly exceeds demand
requirements. Follow vertically up to determine appropriate size.
When exact application values are not shown, interpolation
between values is acceptable. From the Spring Ranges chart,
select the ideal spring range that accommodates the required
outlet set pressure, confirm that system pressure requirements
can be accommodated by valve.
Application: 200 lbs/hr of 100 PSIG Steam reduced to 30 PSIG
Size/Model:
1
/2”“O” Series, 10-50 PSIG spring range
Example:
- Water, Air & Oil (300˚F max)
”, 11/2
”, 2”
FEATURES & OPTIONS
Hardened stainless steel seat and disc for extended
•
service life (55 Rc)
Neoprene & Nylon (composition) fiber diaphragm for water,
•
oil and air service; 250˚F maximum temperature
Viton diaphragm for up to 300ºF service for water, oil
•
& air service
Phosphor Bronze diaphragm for steam service;
•
Neoprene for water, oil & air
Double spring available for extended outlet pressure range
•
Integral stainless steel strainer on 3/4” HC, 1”,
•
11/4”, 11/2”& 2”
Watson McDaniel reserves the
right to change the designs
and/or materials of its
products without notice.
©2010 Watson McDaniel Company
PRESSURE-ADJUSTING SPRING RANGES –
Outlet
Pressure
0-10
10-30 –––
10-50
30-50 –––
40-85 –––
Single Spring
40-100
100-200
0-75 –––
Spring
30-130 –––
Double
428 Jones Boulevard • Limerick Airport Business Center • Pottstown PA • 19464 • Tel: 610-495-5131 • Fax: 610-495-5134
3/8” 1/2” 3/4” 3/4” HC 1” 1
13 13 13 3 7 7 8 8
blue/yellow blue/yellow blue/yellow red red/green red/green red/blue red/blue
14 14 14
black/yellow black/yellow black/yellow
999
red/yellow red/yellow red/yellow
10 10 10
green/blue green/blue green/blue
154
Spring No. & Color Code
Size
48899
green red/blue red/blue red/yellow red/yellow
–––––
5991010
blue red/yellow red/yellow green/blue green/blue
6 10101111
yellow green/blue green/blue green/yellow green/yellow
–––––
–
7, red/green 8, red/blue 8, red/blue 8, red/blue 8, red/blue
8, red/blue 9, red/yellow 9, red/yellow 9, red/yellow 9, red/yellow
8, red/blue 9, red/yellow 9, red/yellow 9, red/yellow 9, red/yellow
9, red/yellow 10, green/blue 10, green/blue 10, green/blue 10, green/blue
––––
www.watsonmcdaniel.com
1
/4”1
1
/2”2”
Page 4
REGULATORS
“
O”Series
Pressure Regulating Valve
DIMENSIONS & WEIGHTS –
Size A B C C Weight
3/8" 4
1/2" 3
3/4" 3
3/4" HC 3
1" 4
11/4
" 4
11/2
" 6
2" 6
CAPACITIES –
Inlet Outlet
Press. Press.
2 46 26 6 92 51 11 130 73 16 145 81 18 180 100 22 199 111 25
15
5 38 21 4 75 42 9 106 59 13 119 66 14 147 82 18 163 91 19
5 65 36 8 130 72 15 184 102 22 205 114 25 254 141 30 281 156 34
20 10 61 34 6 123 69 13 174 97 18 194 109 20 241 134 25 266 149 27
15 45 25 4 90 51 9 128 72 13 143 80 14 177 99 18 196 109 19
5 83 46 10 167 93 20 236 131 28 264 147 32 327 181 39 362 201 43
30 10 83 46 10 167 93 18 236 131 25 264 147 28 327 181 35 362 201 39
20 71 40 6 142 79 13 201 112 18 225 126 20 278 155 25 308 172 27
5 121 67 13 242 134 27 342 190 38 382 212 42 473 263 53 523 291 58
50 25 121 67 10 242 134 20 342 190 28 382 212 32 473 263 39 523 291 43
40 87 49 6 174 97 13 247 138 18 276 154 20 341 191 25 377 211 27
30 214 119 17 428 238 33 607 337 47 678 376 53 839 466 66 928 515 73
100 50 214 119 14 428 238 28 607 337 40 678 376 45 839 466 55 928 515 61
70 195 109 11 275 154 18 390 218 25 436 244 28 540 301 35 597 333 39
30 261 145 19 522 290 39 739 410 55 826 458 62 1021 567 76 1130 627 84
50 261 145 17 522 290 35 739 410 49 826 458 55 1021 567 68 1130 627 75
125
70 261 145 15 522 290 30 739 410 42 826 458 47 1021 567 58 1130 627 64
100 201 112 10 402 225 20 569 318 28 636 355 32 787 440 39 871 486 43
30 307 171 22 615 341 44 871 484 62 974 540 69 1204 668 86 1332 740 95
50 307 171 20 615 341 40 871 484 57 974 540 63 1204 668 78 1332 740 87
150 70 307 171 18 615 341 36 871 484 51 974 540 57 1204 668 70 1332 740 78
100 298 166 14 596 333 28 844 471 40 943 527 45 1167 652 55 1291 721 61
120 239 133 11 478 267 22 677 378 31 756 422 35 935 523 43 1035 578 47
30 401 222 26 802 445 52 1135 630 74 1269 705 83 1570 871 102 1737 964 113
50 401 222 24 802 445 49 1135 630 69 1269 705 78 1570 871 96 1737 964 106
200
70 401 222 23 802 445 46 1135 630 65 1269 705 72 1570 871 89 1737 964 99
100 401 222 20 802 445 40 1135 630 57 1269 705 63 1570 871 78 1737 964 87
50 494 274 28 988 549 57 1400 777 80 1565 869 90 1935 1074 111 2141 1189 123
250 70 494 274 27 988 549 54 1400 777 76 1565 869 85 1935 1074 105 2141 1189 116
125 494 274 22 988 549 45 1400 777 63 1565 869 71 1935 1074 88 2141 1189 97
* Air and water capacities are based on using elastomeric diaphragms.
** 3/4” HC is high-capacity version of standard 3/4” valve.
Note: For capacities of other gases multiply the air capacities by the following factors: Argon–0.85 CO2–0.81 Helium–2.69 Nitrogen–1.02
1
/4 61/2 8- 8
5
/8 61/2 8- 8
5
/8 61/2 8- 8
5
/8 81012
1
/2 81/2 101/2 13 18
1
/2 81/2 101/2 13 18
1
/2 83/4 12 141/2 40
1
/2 83/4 12 141/2 40
Steam (lbs/hr); *Air (SCFM); *Water (GPM)
3/8”, 1/2”, 3/4”
Steam Air Water Steam Air Water Steam Air Water Steam Air Water Steam Air Water Steam Air Water
inches/pounds
Double Spring (lbs)
1
/2 15
FLOW
B
C
Inlet/Outlet Pressures (PSIG)
3/4” HC ** 1” 11/4”1
1
/2”2”
Double Spring
Outline
A
REGULATING VALVES
DIRECT-OPERATED
428 Jones Boulevard • Limerick Airport Business Center • Pottstown PA • 19464 • Tel: 610-495-5131 • Fax: 610-495-5134
www.watsonmcdaniel.com
155
Page 5
REGULATORS
B Series
Pressure Regulating Valve
Watson McDaniel reserves the
right to change the designs
and/or materials of its
products without notice.
©2010 Watson McDaniel Company
Model
Service
Sizes 1/2”, 3/4”, 1”, 11/4”, 11/2”, 2”,
Connections
Body Material
Disc
Diaphragm
Max. Inlet Pressure
Min. Inlet Pressure
Max. Diff. Pressure
Min. Diff. Pressure
B Series
Water, Air, Oil, Other Gases & Liquids
21/2”, 3”, 4”
NPT, 125# & 250# Flanged
1/2”– 21/2
3”& 4” Cast Iron
Neoprene (standard) - 200˚F max
Viton (optional) - 300˚F max
Neoprene/Nylon - 200˚F max
iton (optional) - 300˚F max
V
250 PSIG
10
PSIG
125
PSI
20% of Inlet Pressure
DESIGN PRESSURE/TEMPERATURE RATING – PMA/TMA
DIRECT-OPERATED
NPT 250 PSIG @ 400˚F
REGULATING VALVES
125# FLG 125 PSIG @ 450˚F
250# FLG 250 PSIG @ 450˚F
TYPICAL APPLICATION
The B Series Pressure Regulating Valves are used for reducing
pressure in air and water systems. These regulators are
commonly found in industrial plants, apartment buildings,
water supply systems, schools and underground water
distribution systems.
” Bronze
PRESSURE-ADJUSTING SPRING RANGES
Outlet Pressure (PSIG) Spring No.
1-12 4*
5-35 3
20-70 2
40-125 1
*
1/2” – 1” only
FEATURES & OPTIONS
Diaphragm, disc and cup packing available in Viton for
•
300ºF ser
Balanced pressure regulator allows accurate control even
•
when incoming pr
Internally senses pressure – no external sensing
•
line required
Soft disc in Neoprene or Viton for Class-Vshut-off rating
•
vice (optional)
essure fluctuates
HOW TO SIZE/ORDER
From the Capacity chart, find the inlet pressure and required
regulator outlet pressure. Follow across chart to nearest capacity of
application service medium that meets or slightly exceeds demand
requirements. Follow vertically up to determine appropriate size.
When exact application values are not shown, interpolation
between values is acceptable. From the Spring Ranges chart,
select the ideal spring range that accommodates the r
outlet set pressure. Confirm that system pressure requirements
can be accommodated by valve.
Application: 35 GPM of 70 PSIG Water reduced to 20 PSIG
Size/Model: 1” B-Series, 5-35 PSIG spring range
156
428 Jones Boulevard • Limerick Airport Business Center • Pottstown PA • 19464 • Tel: 610-495-5131 • Fax: 610-495-5134
Example:
equired
C
B
D
FLOW
www.watsonmcdaniel.com
A
Page 6
REGULATORS
B Series
Pressure Regulating Valves
DIMENSIONS & WEIGHTS –
Face-to-Face
Size
1/2", 3/4” 3
1" 3
11/4
" 4
11/2
" 4
2" 5
21/2
" 6
3" 10
4" 13 13
NPT 125# 250# Spring Case (lbs)
Threaded Flanged Flanged Dia. (in.)
3
/8 17/8 957
5
/8 21/4 91/2 58
1
/4 23/8 101/2 63/4 13
3
/4 21/2 103/4 63/4 15
7
/8 33/8 115/8 63/4 20
1
/2 41/4 123/4 63/4 30
CAPACITIES –
Inlet Outlet 1/2” 3/4” 1” 11/4”1
Press. Press. Water Air Water Air Water Air Water Air Water Air Water Air Water Air Water Air Water Air
10 5 5.5 25 10 45 13 60 22 100 33 150 55 250 88 400 132 600 176 800
5 9.8 48 18 86 23 114 39 190 59 285 98 475 156 760 234 1140 312 1520
20 10 8.0 43 14 77 19 102 32 170 48 255 80 425 128 680 192 1020 256 1360
15 5.5 30 10 54 13 72 22 120 33 180 55 300 88 480 132 720 176 960
5 12.5 68 23 122 30 162 50 270 75 405 125 675 200 1080 300 1620 400 2160
30 10 11.3 63 20 113 27 150 45 250 68 375 113 625 180 1000 270 1500 360 2000
20 8.0 48 14 86 19 114 32 190 48 285 80 475 128 760 192 1140 256 1520
5 16.8 98 30
50 25 12.5 88 23 158 30 210 50 350 75 525 125 875 200 1400 300 2100 400 2800
40 8.0 63 14 113 19 150 32 250 48 375 80 625 128 1000 192 1500 256 2000
10 19.3 128 35 230 46 306 77 510 116 765 193 1275 308 2040 462 3060 616 4080
70 30 15.8 125 28
50 11.3 95 20 171 27 228 45 380 68 570 113 950 180 1520 270 2280 360 3040
30 21.0 175 38 315 50 420 84 700 126 1050 210 1750 336 2800 504 4200 672 5600
100 50 17.5 165 32 297 42 396 70 660 105 990 175 1650 280 2640 420 3960 560 5280
70 13.8 135 25 243 33 324 55 540 83 810 138 1350 220 2160 330 3240 440 4320
30 24.3 213 44 383 58 510 97 850 146 1275 243 2125 388 3400 582 5100 776 6800
125 50 21.5 213 39 383 52 510 86 850 129 1275 215 2125 344 3400 516 5100 688 6800
100 12.5 140 23 252 30 336 50 560 75 840 125 1400 200 2240 300 3360 400 4480
30 27.5 250 50 450 66 600 110 1000 165 1500 275 2500 440 4000 660 6000 880 8000
50 25.0 250 45
150
100 17.5 205 32 369 42 492 70 820 105 1230 175 2050 280 3280 420 4920 560 6560
125 12.5 153 23 275 30 366 50 610 75 915 125 1525 200 2440 3000 3660 400 4880
70 28.5 325 51 585 68 780 114 1300 171 1950 285 3250 456 5200 684 7800 912 10400
200 100 25.0 263 45 473 60 630 100 1050 150 1575 250 2625 400 4200 600 6300 800 8400
125 21.5 223 39 401 52 534 86 890 129 1335 215 2225 344 3560 516 5340 688 7120
100 30.8 403 55
250
125 28.0 393 50 707 67 942 101 1570 168 2355 280 3925 448 6280 672 9420 896 12560
Note: For capacities of other gases multiply the air capacities by the following factors: Argon–0.85 CO2–0.81 Helium–2.69 Nitrogen–1.0
A B C D Weight
1
/4 11 41/2 211/2 91/4 125
Water (GPM); Air (SCFM)
176 40 234 67 390 101 585 168 975 268 1560 402 2340 536 3120
225 38 300 63 500 95 750 158 1250 252 2000 378 3000 504 4000
450 60 600 100 1000 150 1500 250 2500 400 4000 600 6000 800 8000
725 74 966 123 1610 185 2415 308 4025 492 6440 738 9660 984 12880
inches/pounds
5
/8 53/4 23 91/4 182
1
/2”2”2
Inlet/Outlet Pressures (PSIG)
1
/2”3” 4”
REGULATING VALVES
DIRECT-OPERATED
428 Jones Boulevar
www.watsonmcdaniel.com
d • Limerick Airport Business Center • Pottstown PA • 19464 • Tel: 610-495-5131 • Fax: 610-495-5134
157
Page 7
REGULATORS
455 Series
Pressure Regulating Valve
Watson McDaniel reserves the
right to change the designs
and/or materials of its
products without notice.
©2010 Watson McDaniel Company
Model
Service
Sizes 1/2”, 3/4”, 1”, 11/4”, 11/2”, 2”, 21/2”, 3”, 4”
Connections NPT, 125# & 250# Flanges
Body Material 1/2”– 1
Seat & Disc Stainless Steel
Diaphragm Neoprene/Nylon
Max. Inlet Pressure
Min. Inlet Pressure
Max. Diff. Pressure
Min. Diff. Pressure
455 Series
Steam, Water, Air & Other Gases
1
/2” Bronze
2”– 4” Cast Iron
250 PSIG
5 PSIG
125 PSI
20% of Inlet Pressure
DESIGN PRESSURE/TEMPERATURE RATING – PMA/TMA
NPT 250 PSIG @ 400˚F
125# FLG 125 PSIG @ 450˚F
250# FLG 250 PSIG @ 450˚F
DIRECT-OPERATED
REGULATING VALVES
PRESSURE-ADJUSTING SPRING RANGES
Size Pressure (PSIG) No. Case Dia. (in.)
1
/2”–11/2”
2” – 4” 15-45 39
Outlet Spring Spring
1-6 56
5-20 36
15-45 26
40-70 16
60-125 15
1-6 413
5-20 49
40-70 37
60-125 27
FEATURES
Operates with minimum inlet pressures of 5 PSIG
•
Stainless steel internals
•
Excellent for use in steam systems that contain large
•
amounts of scale and other contamination
Balance valve for more precise control of downstream
•
pressure
Sensing Line
Connection
TYPICAL APPLICATIONS
The 455 Series are balanced, Externally-Sensed Pressure
Regulating Valves are used for reducing pressure in steam,
air and water systems. Commonly used in heating and other
process applications. Externally-sensed regulators are often more
accurate than internally-sensed regulators because the sensing
line is connected close to the process it is intending to control
and is far enough away from the outlet of the regulator to not be
affected by turbulence.
HOW TO SIZE/ORDER
From the Capacity chart, find the inlet pressure and required
regulator outlet pressure. Follow across chart to nearest capacity
of application service medium that meets or slightly exceeds
demand requirements. Follow vertically up to determine
appropriate size. When exact application values are not shown,
interpolation between values is acceptable. From the Spring
Ranges chart, select the ideal spring range that accommodates
the required outlet set pressure. Confirm that system pressure
requirements can be accommodated by valve.
Application: 1000 lbs/hr of 20 PSIG Steam reduced to 5 PSIG
Size/Model: 1
158
1
/2” 455-Series, 1-6 PSIG spring range
428 Jones Boulevard • Limerick Airport Business Center • Pottstown PA • 19464 • Tel: 610-495-5131 • Fax: 610-495-5134
Example:
C
FLOW
B
A
www.watsonmcdaniel.com
Page 8
REGULATORS
455 Series
Pressure Regulating Valve
DIMENSIONS & WEIGHTS –
Face-to-Face Sensing
Size
1/2" 4
3/4" 4
1" 4
11/4" 53
11/2" 5
2" 9
21/2" 10
3" 10
4" 12
NPT 125# 250#
Threaded Flanged Flanged NPT
1
/4 23/8 101/4 1/4” 15
1
/4 23/8 101/4 1/4” 15
1
/8 23/8 101/4 1/4” 15
1
/4 33/8 11 1/4” 20
1
/2 103/8 107/8 53/4 181/2 3/8” 75
CAPACITIES –
Inlet Outlet 1/2” 3/4” 1” 11/4”1
Press. Press. Steam Water Steam Water Steam Water Steam Water Steam Water Steam Water Steam Water Steam Water Steam Water
5253 4.3 95 7.8 191 15.6 276 22.5 403 33.0 572 47.0 890 73.0 1166 95.0 1484 121
2 95 7.1 171 12.7 342 25.0 494 37.0 722 54.0 1026 76.0 1596 119 2090 156 2660 198
10
5 73 5.6 131 10.1 263 20.0 380 29.0 555 42.0 788 60.0 1226 94.0 1606 123 2044 157
0-5 157 9.7 283 17.4 565 35.0 816 50.0 1193 75.0 1696 105 2638 163 3454 213 4396 271
20
10 125 7.9 225 14.2 450 28.0 650 41.0 950 60.0 1350 85.0 2100 133 2750 174 3500 221
0-10 200 11.2 360 20.1 720 40.0 1040 58.0 1520 85.0 2160 121 3360 188 4400 246 5600 313
30 20 145 7.9 261 14.2 522 28.0 754 41.0 1102 60.0 1566 85.0 2436 133 3190 174 4060 221
25 107 5.6 193 10.1 385 20.0 556 29.0 813 42.0 1156 60.0 1798 94.0 2354 123 2996 157
0-20 295 13.7 531 24.6 1062 49.0 1534 71.0 2242 104 3186 148 4956 230 6490 301 8260 383
50 30 245 11.2 441 20.1 882 40.0 1274 58.0 1862 85.0 2646 121 4116 188 5390 247 6860 313
40 185 7.9 333 14.2 666 28.0 962 41.0 1406 60.0 1998 85.0 3108 133 4070 174 5180 221
0-30 402 16.8 724 30.2 1447 60.0 2090 87.0 3055 127 4342 181 6754 282 8844 369 11256 470
75 50 327 12.5 589 22.5 1177 45.0 1700 65.0 2485 95.0 3532 135 5494 210 7194 275 9156 350
60 255 9.7 459 17.4 918 35.0 1326 50.0 1938 74.0 2754 105 4284 163 5610 213 7140 271
0-50 522 17.7 940 31.8 1879 64.0 2714 92.0 3967 134 5638 191 8770 297 11484 389 14616 495
100 60 455 15.8 819 28.5 1638 57.0 2366 82.0 3458 120 4914 171 7644 266 10010 348 12740 443
80 325 11.2 585 20.1 1170 40.0 1690 58.0 2470 85.0 3510 121 5460 188 7150 246 9100 313
0-60 635 20.2 1143 36.3 2286 73.0 3302 105 4826 153 6858 218 10668 339 13970 443 17780 564
125 70 575 18.5 1035 33.4 2070 67.0 2990 96.0 4370 141 6210 200 9660 311 12650 408 16100 519
100 420 12.5 756 22.5 1512 45.0 2184 65.0 3192 95.0 4536 135 7056 210 9240 275 11760 350
0-70 750 22.4 1350 40.2 2700 80.0 3900 116 5700 170 8100 241 12600 376 16500 492 21000 626
150 100 612 17.7 1102 31.8 2203 64.0 3182 92.0 4651 134 6610 191 10282 297 13464 389 17136 495
125 435 12.5 783 22.5 1566 45.0 2262 65.0 3306 95 4698 135 7308 210 9570 275 12180 350
0-100 977 25.0 1759 45.0 3517 90.0 5080 130 7425 190 10552 270 16414 420 21494 550 27356 700
200
125 850 21.7 1530 39.0 3060 78.0 4420 113 6460 165 9180 234 14280 364 18700 476 23800 606
250 0-125 1180 28.0 2124 50.3 4248 101 6136 145 8968 212 12744 302 19824 470 25960 615 33040 783
A
5
/8 111/4 61/4 183/4 3/8” 95
7
/8 115/8 71/8 191/4 3/8” 135
1
/2 131/8 81/4 20 3/8” 158
Steam (lbs/hr); Water (GPM)
inches/pounds
BC
1
/8 103/4 1/4” 18
Line Weight
Connection (lbs)
Inlet/Outlet Pressures (PSIG)
1
/2”2” 2
1
/2”3” 4”
REGULATING VALVES
DIRECT-OPERATED
Note: Air in SCFM (Standard Cubic Feet per Minute) = Steam (lbs/hr) x 0.36
428 Jones Boulevard • Limerick Airport Business Center • Pottstown PA • 19464 • Tel: 610-495-5131 • Fax: 610-495-5134
www.watsonmcdaniel.com
159
Page 9
REGULATORS
402 & 403 Series
Pressure Regulating Valve
Watson McDaniel reserves the
right to change the designs
and/or materials of its
products without notice.
©2010 Watson McDaniel Company
Model
Service Steam & Air
Sizes 1/2”, 3/4”, 1”, 11/4”, 11/2”, 2”, 21/2”, 3”, 4”
Connections NPT, 150# & 300# Flanged
Body Material Ductile Iron
Seat & Disc Hardened 420 Stainless Steel (55 Rc)
Max. Inlet Pressure
Min. Inlet Pressure
Max. Diff. Pressure
Min. Diff. Pressure
402 403
250 PSIG 450 PSIG
20 PSIG 20 PSIG
150 PSI 250 PSI
15% of Inlet Pressure (10 PSI min)
DESIGN PRESSURE/TEMPERATURE RATING – PMA/TMA
NPT 450 PSIG @ 650˚F
150# FLG 150 PSIG @ 566˚F
300# FLG 450 PSIG @ 650˚F
TYPICAL APPLICATIONS
DIRECT-OPERATED
REGULATING VALVES
The 402 and 403 Series Internally Pilot-Operated Pressure
Regulating Valves are used for pressure reduction on steam
mains and other process equipment. Pilot-operated regulators
will maintain a constant and accurate downstream pressure
regardless of fluctuations in supply pressure or usage. These
regulators can be supplied with an internal sensing option
eliminating the external sensing line.
FEATURES & OPTIONS
Internal pilot minimizes outlet pressure fluctuations.
•
Outlet pressure remains constant even when load varies
Internal Sensing option (If requested the regulator can be
•
modified to internally sense pressure eliminating the
need for an external sensing line)
Ductile Iron body to handle increased pressure
•
and temperature
Hardened stainless steel seat and disc (55 Rc)
•
403 Series regulators use stainless steel wear parts for
•
a higher operating pressure rating (PMO of 450 PSIG)
402/403
Flanged
PRESSURE-ADJUSTING SPRING RANGES
Springs
Single 40-100 9 red/yellow
Double
Outlet Spring Identifying
Pressure (PSIG) No. Colors
0-10 13 blue/yellow
10-50 14 black/yellow
100-200 10 green/blue
200-280 special bellville washers
30-125
50-200
14 black/yellow
9 red/yellow
9 red/yellow
10 green/blue
HOW TO SIZE/ORDER
From the Capacity chart, find the inlet pressure and required
regulator outlet pressure. Follow across chart to nearest capacity
of application service medium that meets or slightly exceeds
demand requirements. Follow vertically up to determine appropriate
size. When exact application values are not shown, interpolation
between values is acceptable. From the Spring Ranges chart, select
the ideal spring range that accommodates the required outlet set
pressure. Select valve model suitable for system pressure
requirements. Specify Internal or External (Remote) sensing.
Example:
Application: 12,500 lbs/hr of 300 PSIG Steam reduced to 125 PSIG
Size/Model: 2” 403 Series Valve, 100-200 PSIG spring range,
Specify internal or external sensing
160
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B
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Page 10
REGULATORS
402 & 403 Series
Pressure Regulating Valve
DIMENSIONS & WEIGHTS –
Face-to-Face Centerline to Top Overall Height
Size
1/2" 41/2 12 143/8 143/8 163/4 19
3/4" 41/2 12 143/8 143/8 163/4 19
1" 41/2 12 143/8 143/8 163/4 19
11/4" 83/16 123/4 151/8 161/8 181/2 36
11/2" 83/16 123/4 151/8 161/8 181/2 36
2" 83/4 81/4 83/4 13 153/8 171/8 191/2 50
21/2" 91/8 93/4 133/4 161/8 181/4 205/8 70
3" 93/4 101/2 143/4 161/8 193/4 221/8 82
4" 131/2 14 16 183/8 24 263/8 170
NPT 150# 300# Single Double Single Double (lbs)
Threaded Flanged Flanged Spring Spring Spring Spring
CAPACITIES –
Inlet Outlet 1/2”, 3/4” 1” 11/4
Press. Press. Steam Air Steam Air Steam Air Steam Air Steam Air Steam Air Steam Air Steam Air
20 0-10 175 60 425 145 600 204 850 289 1300 442 2750 935 3850 1309 4900 1666
0-10 270 88 655 213 924 300 1309 425 2002 650 4235 1375 5929 1925 7546 2450
30
20 203 67 493 162 696 228 986 323 1508 494 3190 1045 4466 1463 5684 1862
0-20 385 130 935 315 1320 444 1870 629 2860 962 6050 2035 8470 2849 10780 3626
50
30 343 116 833 281 1176 396 1666 561 2548 858 5390 1815 7546 2541 9604 3234
0-50 690 231 1675 561 2364 792 3349 1122 5122 1716 10835 3630 15169 5082 19306 6468
100 60 637 214 1547 519 2184 732 3094 1037 4732 1586 10010 3355 14014 4697 17836 5978
80 455 151 1105 366 1560 516 2210 731 3380 1118 7150 2365 10010 3311 12740 4214
0-60 865 287 2100 697 2964 984 4199 1394 6422 2132 13585 4510 19019 6314 24206 8036
125 70 805 270 1955 655 2760 924 3910 1309 5980 2002 12650 4235 17710 5929 22540 7546
100 588 196 1428 476 2016 672 2856 952 4368 1456 9240 3080 12936 4312 16464 5488
0-70 1019 343 2474 833 3492 1176 4947 1666 7566 2548 16005 5390 22407 7546 28518 9604
150 100 858 287 2083 697 2940 984 4165 1394 6370 2132 13475 4510 18865 6314 24010 8036
125 609 214 1479 519 2088 732 2958 1037 4524 1586 9570 3355 13398 4697 17052 5978
0-100 1337 445 3247 1080 4584 1524 6494 2159 9932 3302 21010 6985 29414 9779 37436 12446
200 150 1001 333 2431 808 3432 1140 4862 1615 7436 2470 15730 5225 22022 7315 28028 9310
175 739 245 1794 595 2532 840 3587 1190 5486 1820 11605 3850 16247 5390 20678 6860
0-125 1652 550 4012 1335 5664 1884 8024 2669 12272 4082 25960 8635 36344 12089 46256 15386
250 175 1358 452 3298 1097 4656 1548 6596 2193 10088 3354 21340 7095 29876 9933 38024 12642
200 1138 378 2763 918 3900 1296 5525 1836 8450 2808 17875 5940 25025 8316 31850 10584
0-150 2016 665 4896 1615 6912 2280 9792 3230 14976 4940 31680 10450 44352 14630 56448 18620
300 200 2016 665 4896 1615
250 1250 417 3035 1012
0-200 2657 875 6452 2125 9108 3000 12903 4250 19734 6500 41745 13750 58443 19250 74382 24500
400
280 2146 711 5211 1726
0-225 2975 984 7225 2389
450
280 2975 984 7225 2389 10200 3372 14450 4777 22100 7306 46750 15455 65450 21637 83300 27538
Note: For capacities of other gases multiply the air capacities by the following factors: Argon–0.85 CO2–0.81 Helium–2.69 Nitrogen–1.02
A B C Weight
Steam (lbs/hr); Air (SCFM)
inches/pounds
Inlet/Outlet Pressures (PSIG)
”1
6912 2280 9792 3230 14976 4940 31680 10450 44352 14630 56448 18620
4284 1428 6069 2023 9282 3094 19635 6545 27489 9163 34986 11662
7356 2436 10421 3451 15938 5278 33715 11165 47201 15631 60074 19894
10200 3372 14450 4777 22100 7306 46750 15455 65450 21637 83300 27538
1
/2
”2”2
1
/2
”3” 4”
REGULATING VALVES
DIRECT-OPERATED
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161
Page 11
BACK PRESSURE-RELIEF VALVES
Watson McDaniel reserves the
right to change the designs
and/or materials of its
R Series & 10691
Relief & Back-Pressure Regulating Valves
products without notice.
©2010 Watson McDaniel Company
Model
Service
R Series & *10691 Series
Liquids
Sizes 1/2”, 3/4”, 1”, 11/4”, 11/2”, 2”, 3”
Connections NPT
Body & Seat Material Body: Bronze Seat: Bronze or EPDM*
Valve Material Stainless Steel (1/2” – 1
Bronze (2” – 3”)
Max. Inlet Pressure
* For tight shut-off, use Model 10691 with EPDM soft seat.
Available in 1/2”, 3/4” & 1” sizes only.
300 PSIG
DESIGN PRESSURE/TEMPERATURE RATING – PMA/TMA
NPT 300 PSIG @ 180˚F
PRESSURE-ADJUSTING SPRING RANGES
Relief Pressure (PSIG) Spring No. – Color
1-6 (R only) 4, yellow*
5-35 3, silver
DIRECT-OPERATED
REGULATING VALVES
25-100 2, blue
75-300 1, red
1
*
/2”–11/2” only
TYPICAL APPLICATIONS
The R Series & 10691 Series Back Pressure Relief Valves are
used in the following applications:
• Water pump bypass for irrigation, sprinkler systems on
golf courses, fountains and fire protection systems
• Fuel oil pump bypass on commercial systems or large
residential systems
Caution: Not to be used as an emergency or safety
relief valve.
FEATURES & OPTIONS
Four Springs – easily interchanged to cover pressures
•
from 1 to 300 PSIG
Heavy-duty bronze valve body
•
10691 Series has EPDM Seat for tight shut-off (1/2” - 1”)
•
1
/2”)
FLOW
B
1/2” thru 1
Series 10691
Relief Valve has
Soft EPDM Seat for
tight shut-off in sizes
1/2”, 3/4” & 1”
D
C
FLOW
B
1
/2”
2” & 3”
D
C
PRESSURE ADJUSTMENT
To adjust set pressure of valve, remove top cap, loosen lock
nut and adjust pressure with steel setting screw. Rotating the
screw clockwise increases the compression on the spring thereby
increasing the set pressure. Rotating the screw counter-clockwise
lowers the set pressure. Tighten the lock nut and replace top cap
and gasket when desired set pressure is reached.
HOW TO SIZE/ORDER
Specify: • Regulator: R-Series or 10691
Examples:
Note: Units are not factory set unless specified.
162
• Size based on capacity chart
• Spring range or relief pressure
1” R-Series – 5-35 PSIG relief pressure range
1” R-Series – 20 PSIG (factory set)
428 Jones Boulevard • Limerick Airport Business Center • Pottstown PA • 19464 • Tel: 610-495-5131 • Fax: 610-495-5134
DIMENSIONS & WEIGHTS –
Size B C D Weight (lbs)
1/2" 1
3/4" 1
1" 1
11/4" 1
11/2" 2
2" 2
3" 3
Note: Model 10691 available only in sizes 1/2” thru 1”.
1
/8 11/2 35/8 1.5
3
/8 13/4 51/2 2
5
/8 21/4 63
7
/8 23/8 66
3
/16 25/8 67/8 8
1
/2 25/16 83/4 10
7
/8 41/8 107/8 25
www.watsonmcdaniel.com
inches /pounds
Page 12
BACK PRESSURE-RELIEF VALVES
R Series & 10691
Relief & Back-Pressure Regulating Valves
CAPACITIES –
Water (GPM)
At 10% Over Set Pressure
Spring Set
Range Pressure 1/2” 3/4” 1” 11/4
(PSIG) (PSIG)
1-6 3 1.2 2.2 3.2 4.3 5.4 - -
5-35 10 0.3 0.4 0.4 0.5 0.5 0.6 0.7
5-35 20 0.6 0.7 0.8 1.0 1.1 1.3 1.6
25-100 50 1.0 1.3 1.6 1.8 2.2 2.6 3.2
25-100 75 1.4 1.9 2.3 2.8 3.4 4.0 5.0
75-300 100 1.9 2.5 3.2 3.8 4.6 5.4 6.9
75-300 200 3.4 4.4 5.8 6.9 8.2 9.7 12.3
”1
1
/2
”2” 3”
At 20% Over Set Pressure
Spring Set
Range Pressure 1/2” 3/4” 1” 11/4
(PSIG) (PSIG)
1-6 3 2.2 3.4 4.6 5.8 7.1 - -
5-35 10 0.6 0.8 1.1 1.3 1.4 1.8 2.2
5-35 20 1.4 1.9 2.4 3.0 3.4 4.1 4.8
25-100 50 1.8 2.0 3.1 3.8 4.4 5.4 6.4
25-100 75 2.3 3.2 4.0 4.8 5.6 6.9 8.1
75-300 100 3.6 4.2 5.0 6.3 7.0 7.3 8.9
75-300 200 6.5 7.6 9.0 11.2 12.4 13.1 16.0
The R Series Relief Valve water capacities at both 10% and 20% over “Set Pressure” are tabulated in the above table. Enter the chart at the desired
“Set Pressure” in the gray column and read the capacity in GPM to determine proper Valve Size. Select a spring with a relief range that includes the
“Set Pressure” required. Example: A 1” valve set at 50 PSIG will pass 3.1 GPM if the system pressure exceeds the set point by 20%.
”1
1
/2
”2” 3”
REGULATING VALVES
DIRECT-OPERATED
HOW IT WORKS
The Relief Valve is actuated by the
system pressure on the inlet side of
the valve. Valve loading is provided
by a spring. The adjustment is done
by removing the cap and rotating the
screw clockwise or counter-clockwise.
Spring load balances against the
opening force of the upstream
(or relief) pressure. Valve will open
at the slightest increase in pressure
above the spring set point, and will
close when the excess pressure
has been relieved.
The higher the system pressure is
above the relief set point pressure,
the more flow the valve will pass.
It is therefore typical to specify the
maximum capacity of a back pressur
relief valve at 10% & 20% over set
pressure.
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www.watsonmcdaniel.com
Optional Tank or
Suction Side of Pump
Outlet
Inlet
Pump
Suction
A Relief Valve allows water to recirculate through
e
the pump even when the discharge valve on the
pump is completely closed. As a rule, a minimum
of 20% of the pump capacity must recirculate to
prevent overheating of the pumped liquid.
R-Series
or
10691
Flow
Pressurized
System
(liquid)
R-Series
or
10691
Outlet
Inlet
163
Page 13
BACK PRESSURE RELIEF VALVES
3040 Series
Relief & Back Pressure Regulating Valve
Model 3040 Series
Service Water, Oil, other Liquids, Air
Sizes 1/2”, 3/4”, 1”, 11/4”, 11/2”, 2”
Connections NPT, 125# & 250# Flanged
1
Body Material Bronze - 1/2”– 1
Cast Iron - 2” Threaded
Cast Iron - 2” Flanged
Disc Material Buna-N/Teflon - 200ºF max
Viton (optional) - 300ºF max
Diaphragm Neoprene/Nylon - 200ºF max
Viton (optional) - 300ºF max
Max. Inlet Pressure
250 PSIG
DESIGN PRESSURE/TEMPERATURE RATING – PMA/TMA
NPT 300 PSIG @ 200˚F
125# FLG 125 PSIG @ 200˚F
250# FLG 250 PSIG @ 200˚F
DIRECT-OPERATED
REGULATING VALVES
TYPICAL APPLICATIONS
The 3040 Series Back Pressure Valves relieve upstream
pressure in a variety of processes. Automatically
maintains desired maximum pressure in a vessel or
system by relieving excess pressure into lower pressure
return line or to atmosphere. Ideally suited for use as
pump bypass control valve by maintaining constant
pump discharge pressures. Used as a continuously
operating valve for protection against overpressure
conditions
CAUTION: Not to be used as an emergency or
.
safety relief valve.
FEATURES & OPTIONS
Soft Seat for tight shut-off
•
Easy maintenance
•
Self-contained
•
Fast response
•
Accurate control
•
Optional Viton trim for 300ºF service
•
/2” Threaded
PRESSURE-ADJUSTING SPRING RANGES
DIMENSIONS & WEIGHTS –
Relief Pressure (PSIG) Spring No.
Size
1/2" 4
3/4" 4
1" 4
11/4" 4
11/2" 5
2" 9
NPT 125# 250# (lbs)
Threaded Flanged Flanged
13
1-12 4*
5-35 3
20-70 2
40-125 1
* 1/2” – 1” only
Face-to-Face
A B C Weight
1
/8 25/16 910
1
/8 25/16 910
1
/8 25/16 910
/16 31/4 123/4 15
3
/16 31/2 131/4 17
1
/2 103/8 107/8 51/2 163/4 45
©2010 Watson McDaniel Company
inches/pounds
Watson McDaniel reserves the
right to change the designs
and/or materials of its
products without notice.
Adjustment
Screw
PRESSURE ADJUSTMENT
Rotating the adjustment screw clockwise increases
the compression on the spring, thereby increasing the
set pressur
clockwise, lowers the set pr
after adjustment.
e. Rotating the adjustment screw counter-
essure. Tighten lock nut
HOW TO SIZE/ORDER
Specify: • Regulator 3040 Series
Example: 2” 3040 Series – 5-35 PSIG spring range
164
• Size based on capacity chart
• Spring range or relief pressure
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Page 14
BACK PRESSURE RELIEF VALVES
3040 Series
Relief & Back Pressure Regulating Valve
CAPACITIES –
Spring
Range
(PSIG)
20-70 50 12.7 25.4 31.8 64 95 159
40-125 75 15.6 31.2 39.0 78 117 195
40-125 100 18.0 36.0 45.0 90 135 225
40-125 125 20 40 50 100 150 250
Spring
Range
(PSIG
20-70 50 14.0 27. 35.6 71 105 177
40-125 75 17.2 34.3 43.7 87 129 217
40-125 100 19.8 39.6 50.4 101 149 250
40-125 125 22 44 56 112 166 278
The 3040 Series Relief Valve water and air capacities at both 10% and 20% over “Set Pressure” are tabulated in the above tables. Enter the chart at
the desired “Set Pressure” in the gray column and read the capacity in GPM or SCFM to determine proper Valve Size. Select a spring with a relief range
that includes the “Set Pressure” required. Example: A 1” valve set at 50 PSIG will pass 35.6 GPM water or 409 SCFM air if the system pressure
exceeds the set point by 20%.
Set Pressure
(PSIG) 1/2” 3/4” 1” 11/4
1-12 5 4.0 8.0 10.0 – – –
5-35 10 5.7 11.4 14.3 29 43 71
5-35 20 8.1 16.2 20.3 41 61 101
Set Pressure
(PSIG) 1/2” 3/4” 1” 11/4
)
1-12 5 4.4 8.8 11.2 – – –
5-35 10 6.3 12.5 16.0 32 47 79
5-35 20 8.9 17.8 22.7 45 67 113
Water (GPM)
At 10% Over Set Pressure
At 20% Over Set Pressure
”11/2
”11/2
”2”
”2”
CAPACITIES –
Air (SCFM)
At 10% Over Set Pressure
1/2” 3/4” 1” 11/4
31 55 111 – – –
39 70 141 203 297 422
56 100 201 290 424 603
106 191 381 551 805 1144
148 266 532 768 1123 1596
190 341 682 986 1441 2047
231 416 833 1203 1758 2499
”11/2
”2”
At 20% Over Set Pressure
1/2” 3/4” 1” 11/4
32 57 113 – – –
41 73 146 211 308 438
59 106 212 306 447 635
114 204 409 591 863 1226
159 287 573 828 1210 1719
205 369 737 1065 1556 2212
250 451 901 1302 1903 2704
”11/2
”2”
REGULATING VALVES
DIRECT-OPERATED
HOW IT WORKS
The 3040 Series Back Pressure
Valve senses upstream pressure
acting on the underside of the
diaphragm through a port in the
bottom diaphragm case.
An increase in the upstream
pressure above the set point will
compress the spring and allow
the valve to open. The spring
will close the valve as the
upstream pressure decreases
to the set point.
The higher the system
pressurizes above the relief
set point pressure, the more
flow the valve will pass. It is
therefore typical to specify the
maximum capacity of a back
pressure relief valve at 10%
& 20% over set pr
essure.
Optional Tank
or Suction Side
of Pump
Outlet Inlet
Suction
Pump
3040
Series
Flow
3040
Series
essurized
Pr
System
A Relief Valve allows water to recirculate through
the pump even when the discharge valve on the
pump is completely closed. As a rule, a minimum
of 20% of the pump capacity must recirculate to
prevent overheating of the pumped liquid.
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165
Page 15
TEMPERATURE REGULATORS
W91/W94 Series
Self-Operated Temperature Regulators
Design & Operation
W91 – Non-Indicating
W94 – Dial Thermometer
DIAL THERMOMETER
(Model W94)
BELLOWS
Watson McDaniel reserves the
right to change the designs
and/or materials of its
products without notice.
©2010 Watson McDaniel Company
CAPILLARY TUBING
CONNECTION
DIRECT-OPERATED
REGULATING VALVES
OVERRANGE
PROTECTION SPRING
RANGE ADJUSTMENT SPRING
CAP
ADJUSTMENT SCREW
ADJUSTMENT SCREW
TEFLON V-RING PACKING
BUSHING
YOKE
TEMPERATURE
VALVE STEM
VALVE PLUG
SENSING BULB
ADJUSTING BAR
SET POINT SCALE
JAM NUTS
PACKING NUT
BONNET NUT
STAINLESS STEEL SEATS
VALVE BODY
166
Housing Assembly
The housing consists of a cap and yoke constructed from precision die cast aluminum. This assembly
ensures permanent alignment with the valve body, while protecting the bellows assembly. The yoke
includes a set point scale used to reference the setting of the temperature adjustment screw. The entire
housing is finished in a corrosion resistant, baked blue epoxy.
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Page 16
TEMPERATURE REGULATORS
W91/W94 Series
Self-Operated Temperature Regulators
Design & Operation
Description
The W91/W94 Self-Operating Temperature Regulator is a mechanically operated device designed to regulate
system temperature by modulating the flow of a heating or cooling fluid in response to temperature changes.
Principles of Operation
The W91/W94 Temperature Regulator is a fully self-contained unit, requiring no external power source
(i.e., compressed air or electricity). Regulation takes place when the sensing element (bulb) of the thermal
system is exposed to changes in temperature. The thermal system is charged with a predetermined
amount of vapor fill, which, when heated, will cause a bellows within the unit’s actuator housing to
expand. As the bellows expands, it compresses a return spring while simultaneously moving the valve
stem downward to stroke the valve. When the process temperature decreases (or in the event of thermal
system failure), the return spring will move the valve stem upward to the “out” position. The choice of
valve action (stem In-To-Close for Heating or stem In-To-Open for Cooling) will determine the system
failure position.
REGULATING VALVES
DIRECT-OPERATED
Direct-Acting – HEATING
Direct-Acting actuators are designed to move the valve stem closed (in-to-close) as the
control signal (temperature) increases.
Reverse-Acting – COOLING
Reverse-Acting actuators are designed to move the valve stem open (in-to-open) as the
control signal (temperature) increases.
Selecting a Temperature Regulator
The W91/W94 T
systems, where small valve stroke modulations will cor
load changes, or rapid temperature changes occur, a pneumatically or electrically powered Control
Valve should be specified. Please consult the Control Valves section of this catalog.
emperature Regulator is recommended for controlling the flow on relatively stable
rect temperature drift. Where sudden or large
Actuator
The actuator consists of the following assemblies: housing, bellows and spring return, and thermal
system. Two actuator models are available:
• Model W91 is non-indicating.
• Model W94 is equipped with an integral dial thermometer to indicate sensing bulb temperature.
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167
Page 17
TEMPERATURE REGULATORS
W91/W94 Series
Self-Operated Temperature Regulators
Design & Operation
Bellows & Spring Return Assembly
The accordion type bellows is corrosion resistant to provide accurate response for the life of the
regulator. An adjusting bar is provided to turn the brass temperature adjustment screw, which
compresses or expands the range adjustment spring, thereby setting the control point of the unit.
Thermal System Assembly
The thermal system (sensing bulb and capillary tubing) is available in copper (for best heat transfer)
or 316 stainless steel (for corrosive applications) and can be ordered with a variety of protective
coverings, including Teflon or stainless steel spiral armor. Capillary tubing lengths can be specified
from 8 to 52 feet.
Watson McDaniel reserves the
right to change the designs
and/or materials of its
products without notice.
©2010 Watson McDaniel Company
DIRECT-OPERATED
REGULATING VALVES
Integral Dial Thermometer
The integral dial thermometer (Model W94) displays the temperature
at the sensing bulb. This allows for easy adjustment of the temperature
set point, as well as continuous monitoring of the application, without
the installation of an additional thermometer. The thermometer has a
1
3
/2" dialface and can be rotated and tilted for maximum readability.
Temperature Range
Nominal ranges from 20°F (-10°C) through 440°F (225°C) are available.
The nominal range defines the entire temperature range of the unit.
The service conditions and choice of valve style and action will
determine the actual operating range (recommended working span) of
the unit. The nominal range should be selected so that the set point
falls within the recommended working span for the specified valve style
and action. Models W91/W94 include an overrange protection spring,
which allows the sensing bulb to be heated 100°F above the upper limit
of the unit’s nominal range for system cleaning or temporary situations.
Sensing Bulb Installation:
Care must be taken to ensure
that entire length of the sensing
bulb is immersed into the
medium at the sensing location.
Partial immersion will result in
faulty control. When the sensing
bulb is installed into a pipeline,
constant flow must be continued
through the line in order to
maintain an active thermal signal
to the bulb. Should a closed
valve cause stoppage of flow to
the bulb, a reduced bypass flow
must be installed to maintain the
thermal signal.
The sensing bulb is designed to
be installed in either a horizontal
position or a vertical position
with the tip down. If the tip must
be installed upwards, please
specify when ordering, as a
special bulb construction is
required.
Accuracy
The W91/W94 Temperature Regulator is a “set-and-forget” regulating device. Once the proper control
point setting has been achieved, the unit requires virtually no adjustments and very little maintenance.
Control point accuracy is dependent upon the sensing bulb location, load change size and speed, and
valve size. The sensing bulb must be installed in an area within the process that is most representative of
overall process conditions. Care should be taken not to locate the bulb in close proximity to the valve, as
the regulator might respond to temperature changes before the process has had time to reach the control
point. Where sudden or large load changes occur, a pneumatically or electrically powered Control Valve
should be specified. Please consult the Control Valves section of this catalog.
168
428 Jones Boulevard • Limerick Airport Business Center • Pottstown PA • 19464 • Tel: 610-495-5131 • Fax: 610-495-5134
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Page 18
TEMPERATURE REGULATORS
W91/W94 Series
Self-Operated Temperature Regulators
Design & Operation
Accuracy (continued)
Valve sizing also plays a major part in regulator performance. A valve that is too small will not be able to
provide the desired capacity during peak load conditions, while a valve that is too large may overshoot the
control point and operate with the valve plug too close to the seat, resulting in undue wear of the plug and
seat. As part of a well-designed system, a properly sized valve (operating in the 60-90% open position)
can control to within 2 to 5 °F.
Valve
W91/W94 Temperature Regulators are available with a wide variety of globe valves in
various styles, materials, connections and sizes.
Style
W91/W94 Regulator Valves are offered in single-seated, double-seated and
three-way designs:
• Single-Seated Balanced Valves are designed for heating applications where
tighter shut-off is required. The leakage rate is approximately 0.1% of the
maximum capacity.
• Double-Seated Balanced Valves are designed for cooling applications
where a slight amount of leakage is normally acceptable. Since temperature
fluctuations may cause expansion and contraction across the seats, tight
shut-off is not always possible. The leakage rate can be up to approximately
0.5% of the maximum capacity.
• 3-Way Valves are used for mixing two flows together, or for diverting a flow
to or around a device (bypass). In order to produce consistent flow quantity
for stable operation, the pressure drop across both flow paths (inlet to outlet)
must be nearly equal.
3-Way Valves are of the Sleeve-Type (common port on the bottom). This
type is most commonly used for diverting applications; however, due to its
design it can also be used for mixing applications. The Sleeve-Type design
is constructed with an O-ring around the sleeve. This O-ring is suitable for
water or glycol type service, up to a maximum of 300˚F. A higher temperature
O-ring for use with other fluids, such as oil, or for temperatur
is available. Consult factory.
es up to 410˚F,
CAUTION:
Temperature Regulators
are not considered
shut-off valves. A
pressure surge may
force a single seated
valve plug open. The
W91/W94 Temperature
Regulator is a balanced
equilibrium system at
the set point and
provides no power to
tightly seat the valve
plug. A separate power
driven or hand actuated
valve is required to
ensure tight shut-off
when necessary.
CAUTION:
3-Way Valves are not
designed for use in
steam applications.
REGULATING VALVES
DIRECT-OPERATED
Thermowell
For applications in which the process media may be corrosive or contained under
pressure, the use of a thermowell is required to prevent damage to the sensing bulb.
A thermowell will also facilitate the removal of the sensing bulb and thermal system
from the operating process. Thermowells are available in a variety of connection
styles, materials and lengths.
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Note: to ensure
minimum response
time, Heat Transfer
Paste should be applied
to the sensing portion
of the bulb before
installation.
169
Page 19
TEMPERATURE REGULATORS
W91/W94 Series
Self-Operated Temperature Regulators
Design & Operation
Action
Single-Seated Valves are available as stem In-To-Close (Normally Open) for Heating applications.
Double-Seated Valves are available as stem In-To-Open (Normally Closed) for Cooling applications.
3-Way Valves can be plumbed for either mixing or diverting service.
Temperature Regulator Valve Action
Application Stem Action Normal (Fail) Position
Heating In-To-Close Normally Open
Cooling In-To-Open Normally Closed
Body & Material and Connection
W91/W94 Temperature Regulators are available with bronze and cast iron valve bodies with
DIRECT-OPERATED
REGULATING VALVES
Union, Flanged and Threaded connections.
Watson McDaniel reserves the
right to change the designs
and/or materials of its
products without notice.
©2010 Watson McDaniel Company
Trim
Valve trim is composed of the stem and plug assembly, and the seats within the ports. Single and
double-seated bronze bodied valves employ a stainless steel, tapered plug for enhanced modulation.
The valve plug is both top and bottom guided to ensure positive seating alignment. 3-Way valves
use a stainless steel sleeve and brass seating surface to change flow direction within the body.
Packing
Valves feature a self-energizing Teflon V-Ring packing, which reduces leakage around the valve stem.
V-Ring packing is spring loaded to maintain proper compression and does not require manual adjustment.
Size
The proper sizing of a regulating valve is one of the most important factors in its selection. A valve that
is too small will not be able to provide the desired capacity during peak load conditions, while a valve that
is too large may overshoot the control point and operate with the valve plug too close to the seat, resulting
in undue wear of the plug and seat. The valve coefficient (C
determine the maximum capacity of a valve. From this value, a valve body
with the appropriate port size can be selected. Port sizes from
4" and connection sizes from
the Valve Selection section of this catalog.
1
/2" through 4" are available. Please consult
) is used to
v
1
/8" through
Valve Coefficient (Cv):
The rated valve coefficient
is used to describe the
relative flow capacity
of the valve based on
standard test conditions.
Please refer to the Valve
Selection Section for
detailed information.
170
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Page 20
TEMPERATURE REGULATORS
W91/W94 Series
Self-Operated Temperature Regulators
Typical Applications for Temperature Regulators
W94
W94 Heating Fuel Oil To Proper Temperature
W94
Temperature
Steam Supply
Sensing Bulb
Elevating Temperature Of A Plating Or Finishing Tank
Steam Supply
Bypass
W94
Bypass
Exchanger
Pump
Fuel Oil
Storage Tank
Autoclave/Sterilizer
W91
Steam
Supply
Bypass
Relief
Valve
Temperature
Sensing Bulb
W91 Used to Reduce Oil Temperature In
A Heat Exchanger
Heat
F&T
Trap
Thermostatic
Autoclave
F&T
Trap
Air Vent
Temperature
Sensing Bulb
W94 Used In A Drying Oven ApplicationW91 Used for Regulating Steam Flow In An
Heat
Coil
Outside
Air
Heating
Coil
W91 Used To Contr
Temperature Reduction
F&T
Trap
W94
Finned Bulb for
Improved Heat
Transfer
Conveyor
Steam
Air Flow
Drying Oven
Exhaust Air
Fan
ol Water Flow In A Grinding Mill For
REGULATING VALVES
DIRECT-OPERATED
Hot Oil
Inlet
Cold
W91
Cooling
Water
Inlet
Cool Oil
Heat Exchanger
Oil Cooler
Cooling W
ater Outlet
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Outlet
Temperature
Sensing Bulb
Water
Inlet
Cooling
Water
Outlet
Temperature
Sensing
Bulb
W91
Bypass
Grinding
Mill
Water
Flow
171
Page 21
TEMPERATURE REGULATORS
W91/W94 Series
Self-Operated Temperature Regulators
Indicating Dial
Model W94 only)
(
The W91 & W94 Self-Operating
Temperature Regulators are the preferred
choice of original equipment manufacturers,
mechanical contractors and specifying
engineers. These regulators require no
external power source and are ideal for
regulating the temperature of tanks, process
streams and various types of industrial
equipment. The Actuator is noted for its
rugged die-cast aluminum housing, fully
enclosed bellows assembly and internal
overrange protection.
DIRECT-OPERATED
Valve
Body
Actuator
REGULATING VALVES
Thermal System:
Capillary &
Sensing Bulb
Watson McDaniel reserves the
right to change the designs
and/or materials of its
products without notice.
©2010 Watson McDaniel Company
Self-Operating Design
Indicating & Non-Indicating
Models Available
Heavy Duty Die Cast
Aluminum Housing
1
/2" thru 4" Valve Sizes
Fully Enclosed Bellows
Internal Overrange protection
Model W91 (without indicating dial)
features a lower profile and should be
specified where space constraints may
be an issue.
Model W94 (with indicating dial)
will allow the operator to verify the
process temperature and to aid in
temperature adjustment.
Thermowells:
For applications in which the process media
may be corrosive or contained under pressure,
the use of a thermowell is required to prevent
damage to the sensing bulb. A thermowell will
also facilitate the removal of the sensing bulb
and thermal system from the operating
process.
How to write proper model number:
Explanation of
Model Number:
Model Number:
W91 06 08 S15 175-13
model temp. cap. bulb valve
range length type body
W910608S15175-13
HOW TO ORDER
Models Temperature Range Capillary Length Bulb Valve Body Selection
W91 Non-Indicating 01 – 14 08 8 Feet (std) S15 (brass bulb) Refer to Valve Body Section
W94 Indicating Dial Refer to Temperature 12 12 Feet (standard)
Note: Thermowells are ordered separately.
See page 175 for model numbers & lengths.
172
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Range Chart 16 16 Feet (
20 20 Feet
24 24 Feet
S16 (stainless bulb)
www.watsonmcdaniel.com
Omit this selection
if purchasing Actuator only)
Page 22
TEMPERATURE REGULATORS
W91/W94 Series
Self-Operated Temperature Regulators
Model
Service
W91/W94
Water, Steam, Other Liquids
Sizes 1/2”– 4”
Connections Threaded, Union Ends, 125# FLG
250# FLG (optional)
Body Material 1/2” – 1
1
/2” Bronze/Stainless Steel
2” Cast Iron (Direct-acting)
2” Bronze (Reverse-acting)
21/2” – 4” Cast Iron
Seat Material Stainless Steel
Max. Inlet Pressure
250 PSIG
W91
Non-Indicating
Actuator
W94
Indicating
Actuator
4.92
[125]
Dimensions: inches [mm]
Ø
3.67
[93]
REGULATING VALVES
DIRECT-OPERATED
Specifications
Actuator Models
W91 - Non-Indicating
W94 - Indicating Dial
9.00
[228]
Ø
3.63
[92]
Dial Thermometer
Housing
Bellows
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31/2" dial, stainless steel case,
swivel and angle adjustment
(Model W94 only)
Die cast aluminum, epoxy powder
coated blue finish
High pressure brass, corrosion
resistant, tin plated finish
9.00
[228]
Ø
3.63
[92]
Overrange Protection
Approximate Shipping Weight
Upper range limit +100°F for
temporary situations
Actuator
W91 6.0 lbs [2.7 kg]
W94 6.6 lbs [3.0 kg]
Valve
See Valve Selection tables
173
Page 23
TEMPERATURE REGULATORS
W91/W94 Series
Self-Operated Temperature Regulators
Temperature Range Chart
W91 & W94 Actuators
DIRECT-OPERATED
Range Nominal
Code Range
01 20 to 70 °F -10 to 20 °C 40 to 65 °F 5 to 20 °C
02* 40 to 90 °F 5 to 30 °C 65 to 85 °F 20 to 30 °C
03 30 to 115 °F 0 to 45 °C 85 to 110 °F 30 to 45 °C
04 50 to 140 °F 10 to 60 °C 110 to 135 °F 45 to 60 °C
05 75 to 165 °F 25 to 70 °C 135 to 160 °F 60 to 70 °C
06 105 to 195 °F 40 to 90 °C 160 to 190 °F 70 to 90 °C
07 125 to 215 °F 55 to 100 °C 190 to 210 °F 90 to 100 °C
09 155 to 250 °F 70 to 120 °C 210 to 245 °F 100 to 120 °C
10 200 to 280 °F 95 to 135 °C 245 to 275 °F 120 to 135 °C
11 225 to 315 °F 110 to 155 °C 275 to 310 °F 135 to 155 °C
12 255 to 370 °F 125 to 185 °C 305 to 365 °F 155 to 185 °C
13 295 to 420 °F 145 to 215 °C 365 to 415 °F 185 to 215 °C
REGULATING VALVES
14 310 to 440 °F 155 to 225 °C 415 to 435 °F 215 to 225 °C
* The recommended working span typically falls within the upper third of the nominal range.
Recommended
Working Span *
Watson McDaniel reserves the
right to change the designs
and/or materials of its
products without notice.
©2010 Watson McDaniel Company
Bulb & Capillary Style
ORDER Connection Style Bulb Capillary Capillary Length in Ft.
CODE & Material Material Tubing Material
S15 Brass Copper Copper with A 13” 16” 20”
Union Hub Stainless Steel
Spiral Armor
S16 Stainless Steel Stainless Stainless Steel A 13” 16” 20”
Union Hub Steel with Stainless Steel
Spiral Armor
Other Options available. Consult Factory.
8, 12, 16 20 24
U 12.25” 15.25” 19.25”
U 12.25” 15.25” 19.25”
Bulb Installation: (refer to diagram below)
The 1” NPT Union Hub is not physically attached to the bulb. The 1” NPT Union Hub is threaded into a tank or
vessel. The bulb slides thru the 1” NPT Union Hub and is held in place and sealed with the Union Nut, which
freely turns on the stainless steel armor protected capillary. When using a Thermowell, the 1” NPT Union Hub is
discarded and the Union Nut threads into the Thermowell.
UNION NUT
STAINLESS STEEL ARMOR
PROTECTED CAPILLARY
UNION HUB
1” NPT
“A” INSERTION LENGTH
“U” BULB LENGTH
1.00
174
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Page 24
TEMPERATURE REGULATORS
Thermowell Selection
BULB
W91/W94 Series
Self-Operated Temperature Regulators
Dimensions (inches)
UNION NUT
STAINLESS STEEL ARMOR
PROTECTED CAPILLARY
THERMOWELL
BULB inside THERMOWELL
“A” INSERTION LENGTH
“U” BULB LENGTH
UNION HUB 1” NPT (is not permanently fastened to Bulb)*
1
/4”
1
NPT HUB (is part of Thermowell)
“A” INSERTION LENGTH
1.00
* Included with Bulb;
discard when using Thermowell
Note: to ensure
minimum response
time, Heat Transfer
Paste should be applied
to the sensing portion
of the bulb before
installation.
1.13
REGULATING VALVES
DIRECT-OPERATED
1
1
NPT HUB
/4”
For applications in which the process media may be corrosive or contained under pressure, the use of a thermowell
is required to prevent damage to the sensing bulb. A thermowell will also facilitate the removal of the sensing bulb and
thermal system from the operating process. Because the sensing bulb is isolated from the fluid, this allows the sensing
bulb to be removed without having to drain the liquid below the bulb insertion point.
THERMOWELLS - Model Numbers & Lengths
Brass Stainless Steel
Model No. Model No.
536-S2 536-S6 13" 12.25 13.00 8, 12 or 16
536-SE2 536-SE6 16" 15.25 16.00 20
536-WE2 536-WE6 20" 19.25 20.00 24
Notes:
1) Other connections and lengths may be available, consult factory.
2) External pressure rating on Brass is 500 PSI max.
3) External pressure rating on 316 SS is 1000 PSI max.
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Nominal
Length
“A” INSERTION LENGTH (in.) Capillary Length
BULB THERMOWELL
in Feet
175
Page 25
TEMPERATURE REGULATORS
W91/W94 Series
Single Seated Valve Bodies
Single Seat •1/2”–4”
UNION
NUT
FLOW
DIRECT-OPERATED
REGULATING VALVES
A
(NPT)
A
(UNION)
Actuator
Mounting
Surface
HEATING
Dimensions in inches
Stem In-To-Close
for Heating
Actuator
Mounting
Surface
C C
FLOW
B
B
A
THREADED & UNION
FLANGED
Specifications
Body Material Trim Material Connection Pressure & Temperature Rating
1
/2”- 11/2” Bronze/Stainless Stainless Steel Threaded or Malleable Iron Union Ends 125 PSI @ 450°F
2” Cast Iron Stainless Steel Threaded 250 PSI @ 450°F
2” - 4” Cast Iron Stainless Steel
125# Flanged 125 PSI @ 450°F
250# Flanged 250 PSI @ 450°F
Valve Body Selection
Valve Body Number
(In-To-Close Heating)
NPT Union NPT Cv (PSI ΔP)
175-12-N 175-12-U
175-13-N 175-13-U
175-14-N 175-14-U 1" 10.8 200 4.125 x x 7.00 2.375 2.12 14 [6.35]
175-15-N 175-15-U 11/4" 15.9 200 4.81 x x 7.50 3.25 2.50 17 [7.7]
175-16-N 175-16-U 11/2" 22.4 200 5.19 x x 8.00 3.50 2.69 18 [8.2]
175-17-N 2" 33.1 150 9.50 x x x 5.75 4.75 50 [22.7]
FLANGED
125# 250#
175-17-125 175-17-250 2" 33.1 150 – x 10.375 10.875 x 5.75 4.75 80 [36.3]
175-18-125 175-18-250 21/2" 47.5 65 150 x 10.625 11.25 x 7.00 5.00 96 [43.6]
175-19-125 175-19-250 3" 68.2 50 150 x 10.875 11.625 x 8.00 5.75 110 [49.9]
175-20-125 175-20-250 4" 109.5 40 150 x 10.50 13.125 x 8.75 6.50 160 [72.6]
Note: For 21/2” - 4” sizes, consult factory for proper actuators.
Size Maximum
Connection Capacity
1
/2" 3.2 250 4.125 x x 6.50 2.375 2.12 14 [6.35]
3
/4" 6.3 250 4.125 x x 6.50 2.375 2.12 14 [6.35]
Close-Off Pressure
Valve Type
Standard
Special
AAAABC
Threaded
125# FLG 250# FLG Union (lbs) [kg]
Dimensions
Approx.
Ship. Wt.
176
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Page 26
TEMPERATURE REGULATORS
Watson McDaniel reserves the
right to change the designs
and/or materials of its
products without notice.
©2010 Watson McDaniel Company
W91/W94 Series
Capacity Chart for Single Seated Valves
CAPACITIES –
Inlet
Pressure
(PSIG)
1 91 180 309 454 640 946 1357 1949 3129
3 103 203 348 512 722 1066 1530 2197 3527
5 115 226 387 570 803 1187 1703 2445 3926
10 144 283 486 715 1007 1488 2135 3066 4922
15 173 341 584 859 1211 1789 2568 3686 5919
20 202 398 682 1004 1415 2090 3000 4307 6915
25 231 455 780 1149 1618 2392 3432 4928 7912
30 260 513 879 1294 1822 2693 3864 5548 8908
40 319 627 1075 1583 2230 3295 4729 6790 10,901
50 377 742 1272 1872 2638 3898 5593 8031 12,894
60 435 857 1468 2162 3045 4500 6458 9272 14,887
70 493 971 1665 2451 3453 5102 7322 10,513 16,880
80 552 1086 1861 2740 3861 5705 8187 11,755 18,873
90 610 1200 2058 3030 4268 6307 9051 12,996 20,866
100 668 1315 2255 3319 4676 6910 9916 14,237 22,859
125 814 1602 2746 4043 5695 8416 12,077 17,340 27,841
150 959 1888 3237 4766 6714 9922 14,238 20,443 32,823
175 1105 2175 3729 5490 7734
200 1250 2462 4220 6213 8753
250 1542 3035
Notes: 1) For reduced-port 1/2” valves, consult factory. 2) All steam capacities based on Critical Drop (Choked Flow).
1/2" 3/4" 1" 11/4"1
175-12 175-13 175-14 175-15 175-16 175-17 175-18 175-19 175-20
Steam (lbs/hr)
Size & Valve Body Number
1
/2"2" 2
SINGLE SEATED VALVES
1
/2"3" 4"
Note: Verify that
Maximum Close-Off
Pressure for 2” - 4”
models does not exceed
max rating for selected
Valve Body Number and
Type. (Refer to Valve
Body Number chart
on previous page)
REGULATING VALVES
DIRECT-OPERATED
CAPACITIES –
Pressure
(PSI ΔP)
10 10 20 34 50 71 105 150 216 346
15 12 24 42 62 87 128 184 264 424
20 14
25 16 32 54 80 112 166 238 341 548
30 18 35 59 87 123 181 260 374 600
40 20
50 23 45 76 112 158 234 336 482 774
60 25 49 84 123 174 256 368 528 848
70 27
80 29 56 97 142 200 296 425 610 979
90 30 60 102 151 213 314 451 647 1039
100 32 63 108 159 224 331 475 682 1095
125 36 70 121 178 250 370 531 762 1224
150 39 77 132 195 274 405 582 835 1341
175 42 83 143 210 296
200 45 89 153 225 317
250
1/2” 3/4” 1” 11/4”1
175W-12 175W-13 175W-14 175W-15 175W-16 175W-17 175W-18 175W-19 175W-20
1 3.2 6.3 11 16 22 33 48 68 110
3 5.5 11 19 28 39 57 82 118 190
5 7.2
51 100
Water (GPM)
Size & Valve Body Number
14 24 36 50 74 106 152 245
28 48 71 100 148 212 305 490
40 68 101 142 209 300 431 693
53 90 133 187 277 397 571 916
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1
/2”2”2
SINGLE SEATED VALVES
1
/2”3” 4”
Note: When 175 Type Single
Seated Valves are used with water,
add W to the Valve Body Number.
Example:
175-17-N becomes 175W-17-N
Note: Verify that Maximum
Close-Off Pressure for 2” - 4”
models does not exceed max
rating for selected Valve Body
Number and Type. (Refer to
Valve Body Number chart on
previous page)
177
Page 27
DIRECT-OPERATED
TEMPERATURE REGULATORS
Watson McDaniel reserves the
right to change the designs
W91/W94 Series
Steam Required for Heating Water
Steam flow required through a temperature regulator (lbs/hr)
to heat a specified number of gallons of water per hour (gal/hr)
TABLE 1- Steam Flow Required in Pounds Per Hour (lbs/hr)
Temp ` Temp
Increase Increase
(˚F) 25 50 100 200 300 500 700 1000 2000 4000 10,000 20,000 (˚F)
5° 1 2 4 8 12 21 29 41 83 166 415 830 5°
10° 2 4 8 16 25 41 58 83 166 332 830 1660 10°
15° 3 6 12 25 37 62 87 124 249 498 1245 2490 15°
20° 4 8 17 33 50 83 116 166 332 664 1660 3320 20°
25° 5 10 20 42 62 104 145 207 415 830 2075 4150 25°
30° 6 12 25 50 75 124 174 249 498 996 2490 4980 30°
40° 8 16 33 66 100 166 232 332 664 1328 3320 6640 40°
50° 10 21 42 83 124 207 290 415 830 1660 4150 8300 50°
60° 12 25 50 100 149 249 348 498 996 1992 4980 9960 60°
70° 15 29 58 116 174 290 407 581 1162 2324 5810 11,620 70°
80° 17 33 67 133 199 332 465 664 1328 2656 6640 13,280 80°
90° 19 38 75 149 224 373 523 747 1494 2988 7470 14,940 90°
100° 21 42 83 166 249 415 581 830 1660 3320 8300 16,600 100°
REGULATING VALVES
115° 24 48 95 191 286 477 668 955 1909 3818 9544 19,088 115°
130° 27 54 108 216 324 539 755 1079 2158 4316 10,790 21,580 130°
145° 30 60 120 241 361 601 842 1200 2400 4812 12,030 24,060 145°
160° 33 66 133 266 398 664 929 1328 2656 5312 13,280 26,560 160°
175° 36 72 145 290 436 726 1017 1452 2900 5810 14,524 29,048 175°
200° 41 83 166 332 498 830 1162 1660 3320 6640 16,600 33,200 200°
225° 47 94 187 374 560 934 1307 1867 3735 7470 18,680 37,360 225°
250° 52 104 207 415 622 1037 1452 2075 4150 8300 20,750 41,500 250°
Gallons of Water per Hour To Be Heated
products without notice.
©2010 Watson McDaniel Company
and/or materials of its
HEATING WATER: The amount of steam required to heat water can be found using chart above.
Example:
HEA
Example:
To heat 1000 gallons per hour of water from 40˚F to 140˚F (Temp. increase 100˚F) requires 830 lbs/hr of steam.
TING FUEL OIL:
The amount of steam required to heat fuel oil is half of that to heat water. Use half the value found in chart above.
To heat 1000 gallons per hour of fuel oil from 40˚F to 140˚F (Temp. increase 100˚F) requires 415 lbs/hr of steam.
CAPACITY FORMULAS FOR STEAM LOADS
When BTU Load is Known Capacity of = BTU
When Square Feet Equivalent Capacity of
Direct Radiation (EDR) is Known steam required = Sq. ft. of EDR
When Heating Water with Steam Capacity of
When Heating Fuel Oil with Steam Capacity of
When Heating Air with Steam Coils Capacity of
178
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steam required 1000
(lbs/hr)
(lbs/hr) 4
steam required = GPM
(lbs/hr) 2
steam required = GPM
(lbs/hr) 4
steam required = CFM
(lbs/hr) 900
x Temp Rise °F
x Temp Rise °F
x Temp Rise °F
www.watsonmcdaniel.com
Page 28
TEMPERATURE REGULATORS
W91/W94 Series
COOLING
Dimensions in inches [mm]
Double Seated Valve Bodies
Double Seat • 3/4” – 4”
Stem In-To-Open
for Cooling
Actuator
Actuator
Mounting
Surface
C
C
B
B
FLOW
FLOW
A
A
3/4” – 2”
UNION
FLOW
FLANGED
FLOW
A
A
2” – 4”
Specifications
Body Material Trim Material Trim Style Connection Pressure & Temperature Rating
3/4” - 2” Bronze Stainless Steel Threaded with Malleable Iron Union Ends 250 PSI @ 410°F (210°C)
21/2” - 4” Cast Iron Stainless Steel 125# Flanged 125 PSI @ 350°F (149°C)
Mounting
Surface
C
C
B
B
REGULATING VALVES
DIRECT-OPERATED
Valve Body Selection – Threaded
Valve Body Number
(In-To-Open Cooling)
A24
A33 1 1" 12 250 6.0 [152] 2.3 [58] 2.3 [58] 6.1 lbs [2.75 kg]
A44 11/
A55 11/
A66 2 2" 47 250 8.6 [218] 3.1 [79] 3.1 [79] 17.0 lbs [7.65 kg]
Connection (NPT) Nominal Port
Size Maximum Approximate
3
/
4
4
2
Valve Body Selection – Flanged
Valve Body Number
(In-To-Open Cooling)
B74 21/2"2
B79 3" 3" 90 50 9.0 [229] 5.0 [127] 5.6 [142] 70 lbs [32 kg]
B84 4" 4" 196 40 11.4 [290] 6.3 [160] 6.5 [165] 100 lbs [45 kg]
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Connection Nominal Port
Size Maximum Appr
Capacity
3
/4" 8 250 5.6 [142] 2.3 [58] 2.3 [58] 5.0 lbs [2.25 kg]
11/4" 21 250 7.2 [183] 2.6 [66] 2.6 [66] 10.1 lbs [4.55 kg]
11/2" 30 250 7.7 [196] 2.6 [66] 2.6 [66] 11.1 lbs [5.00 kg]
Capacity
1
/2" 69 65 7.8 [198] 4.8 [122] 5.4 [137] 45 lbs [20 kg]
Close-Off Pressure Dimensions Shipping Wt.
C
v
Close-Off Pressure
C
v
(PSI ΔP)
(PSI ΔP) A
A B C (lbs) [kg]
Dimensions Shipping Wt.
BC
oximate
(lbs) [kg]
179
Page 29
TEMPERATURE REGULATORS
W91/W94 Series
Capacity Chart for Double Seated Valves
COOLING
Watson McDaniel reserves the
right to change the designs
and/or materials of its
products without notice.
©2010 Watson McDaniel Company
CAPACITIES –
Pressure
(PSI ΔP) A24 ITO A33 IT0 A44 IT0 A55 IT0 A66 IT0 B74 ITO B79 ITO B84 ITO
DIRECT-OPERATED
REGULATING VALVES
ITO = In-to-Open
Water (GPM)
Size, Valve Body Number & Coefficient (Cv)
Drop
1 8 12 21 30 47 69 90 196
3 14 21 36 52 81 120 156 339
5 18 27 47 67 105 154 201 438
10 25 38 66 95 149 218 285 620
15 31 46 81 116 182 267 349 759
20 36 54 94 134 210 309 402 877
25 40 60 105 150 235 345 450 980
30 44 66 115 164 257 378 493 1074
40 51 76 133 190 297 436 569 1240
50 57 85 148 212 332 488 636
60 62 93 163 232 364
70 67 100 176 251 393
80 72 107 188 268 420
90 76 114 199 285 446
100 80 120 210 300 470
125 89 134 235 335 525
150 98 147 257 367 576
175 106 159 278 397 622
200 113 170 297 424 665
225 120 180 315 450 705
250 126 190 332 474 743
3/4” 1” 11/4”1
Cv = 8 Cv = 12 Cv = 21 Cv = 30 Cv = 47 Cv = 69 Cv = 90 Cv = 196
1
/2”2”2
DOUBLE SEATED VALVES
1
/2”3” 4”
180
428 Jones Boulevard • Limerick Airport Business Center • Pottstown PA • 19464 • Tel: 610-495-5131 • Fax: 610-495-5134
www.watsonmcdaniel.com
Page 30
TEMPERATURE REGULATORS
W91/W94 Series
BRONZE
Dimensions in inches [mm]
MIXING FLOW DIAGRAM
STEM @ 0
%IN
ST
E
M@5
0% IN
ST
EM @ 1
0
0
%IN
for Mixing or Diverting
Actuator
Mounting
Surface
G
G
UPPER
UPPER
PORT
PORT
(C)
(C)
F
F
3-Way Valve Bodies
3-Way • 1/2” – 2”
DIVERTING FLOW DIAGRAM
STEM @ 0% IN
LOWER
PORT
(B)
(B)
LOWER
PORT
STEM @ 50% I
S
TEM @ 100% IN
N
REGULATING VALVES
DIRECT-OPERATED
COMMON PORT (A)
CAUTION: 3-Way Valves are not designed for use in steam applications.
To properly control the mixing of two flows, inlet pressures at ports B and C should be as equal as possible.
COMMON PORT (A)
E
E
Specifications
Body Material Trim Material Connection Pressure & Temperature Rating
Bronze Bronze Threaded with Malleable Iron Union Ends 250 PSI @ 300°F (149°C)
Valve Body Selection
Valve Body Number
Connection (NPT) Nominal Port C
A18
A25
Size
1
/2"
3
/4"
1
/2" 2.8 250 4.8 [122] 1.8 [46] 1.8 [46] 2.9 lbs [1.31 kg]
3
/4" 5.6 250 5.6 [142] 2.3 [58] 2.3 [58] 4.7 lbs [2.12 kg]
Capacity
v
A34 1" 1" 8.4 250 6.0 [152] 2.3 [58] 2.3 [58] 5.7 lbs [2.57 kg]
A45 11/4"1
A56 11/2"1
1
/4" 15 250 7.2 [183] 2.8 [71] 2.6 [66] 9.5 lbs [4.28 kg]
1
/2" 21 250 7.7 [196] 3.5 [89] 2.6 [66] 11.1 lbs [5.00 kg]
A67 2" 2" 33 250 8.6 [218] 4.1 [104] 3.1 [79] 16.7 lbs [7.55 kg]
Maximum
Close-Off Pressure Dimensions Approximate
(PSI ΔP) E F G Shipping Wt.
428 Jones Boulevard • Limerick Airport Business Center • Pottstown PA • 19464 • Tel: 610-495-5131 • Fax: 610-495-5134
www.watsonmcdaniel.com
181
Page 31
TEMPERATURE REGULATORS
W91/W94 Series
3-Way Valve Bodies
3-Way • 21/2”–4”
MIXING FLOW DIAGRAM
STEM @ 0% IN
STEM @ 50% IN
DIRECT-OPERATED
REGULATING VALVES
STEM @ 100% IN
for Mixing or Diverting
Actuator
Mounting
Surface
UPPER
PORT
(C)
T
LOWER
LOWER
PORT
CAST IRON
Dimensions in inches [mm]
DIVERTING FLOW DIAGRAM
STEM @ 0% IN
G
G
PORT
(B)
(B)
F
F
STEM @ 50% IN
STEM @ 100% IN
COMMON PORT (A)
COMMON PORT (A)
E
E
CAUTION: 3-Way V
To properly control the mixing of two flows, inlet pressures at ports B and C should be as equal as possible.
alves are not designed for use in steam applications.
Specifications
Body Material Trim Material Connection Pressure & Temperature Rating
Cast Iron Bronze 125# Flanged 125 PSI @ 300°F (149°C)
Valve Body Selection
Valve Body Number
182
428 Jones Boulevard • Limerick Airport Business Center • Pottstown PA • 19464 • Tel: 610-495-5131 • Fax: 610-495-5134
Connection Nominal Port
B75 21/2"2
B80 3" 3" 72 125 10.0 [254] 8.0 [203] 6.0 [152] 80 lbs [36 kg]
B85 4" 4" 102 125 13.0 [330] 10.0 [254] 6.9 [175] 140 lbs [64 kg]
Size Maximum
1
/2" 58 125 9.0 [229] 7.1 [180] 5.2 [132] 62 lbs [28 kg]
Capacity
C
v
Close-Off Pressure
(PSI ΔP) E F G Shipping Wt.
www.watsonmcdaniel.com
Dimensions Approximate
Page 32
TEMPERATURE REGULATORS
W91/W94 Series
Capacity Chart for 3-Way Valves
CAPACITIES –
Pressure
Drop
(PSI ΔP) A18 A25 A34 A45 A56 A67 B75 B80 B85
Cv = 2.8 Cv = 5.6 Cv = 8.4 Cv = 15 Cv = 21 Cv = 33 Cv = 58 Cv = 72 Cv = 102
1 2.8 5.6 8.4 15 21 33 58 72 102
3 4.8 10 15 26 36 57 100 125 177
5 6.3 13 19 34 47 74 130 161 228
10 8.9 18 27 47 66 104 183 228 323
15 11 22 33 58 81 128 225 279 395
20 13 25 38 67 94 148 259 322 456
25 14 28 42 75 105 165 290 360 510
30 15 31 46 82 115 181 318 394 559
40 18 35 53 95 133 209 367 455 645
50 20 40 59 106 148 233 410 509 721
60 22 43 65 116 163 256 449 558 790
70 23 47 70 125 176 276 485 602 853
80 25 50 75 134 188 295 519 644 912
90 27 53 80 142 199 313 550 683 968
100 28 56 84 150 210 330 580 720 1020
125 31 63 94 168 235 369 648 805 1140
150 34 69 103 184 257 404
175 37 74 111 198 278 437
200 40 79 119 212 297 467
225 42 84 126 225 315 495
250 44 89 133 237 332 522
Note: Oil service or high temperature service requires special O-ring.
Water (GPM)
Size, Valve Body Number & Coefficient (Cv)
1/2” 3/4” 1” 11/4”1
1
/2”2”2
3-WAY VALVES
1
/2”3” 4”
REGULATING VALVES
DIRECT-OPERATED
428 Jones Boulevard • Limerick Airport Business Center • Pottstown PA • 19464 • Tel: 610-495-5131 • Fax: 610-495-5134
www.watsonmcdaniel.com
183
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