82
845.778.5566 ● Fax: 845.778.7123 ●
www.nicholsonsteamtrap.com
O
PERATION
Regulator is actuated by changes in the
downstream pressure. Any increase in the
downstream pressure above the set point (due
to decreased fluid demand) will force the
diaphragm up and overcome the resistance of
the spring, allowing the valve to close. Any decrease in
the downstream pressure (due to an increased fluid
demand) will decrease the pressure on the diaphragm
and permit the spring to open the valve.
TYPE D50
STAINLESS STEEL
STEAM PRESSURE
REDUCING VALVE
Pressures To 300 PSIG (21 barg)
Temperatures to 420°F (216°C)
Tight Shutoff—Spherical seating surface on floating
stainless steel disc ensures ANSI/FCI 70-2 Class IV
Shutoff.
Unique Adjustable Aspirator—Allows valve to be
adjusted to suit service requirements.
Three Spring Ranges—Provide for wide range of
controlled pressures.
External Adjusting Screw—Allows for quick, accurate
change of reduced pressure set point.
High Grade Stainless Steel Spring—Accommodates
wide range of adjustment without dangerous spring
overload.
Large Area Diaphragm—Assures high sensitivity and
accurate control.
External Body Cap—Provides easy access to internal
screen for cleaning.
MODELS
●
D50SS–Stainless Steel D50
A
PPLICATIONS
●
Clean steam systems utilizing deionized
steam
●In-line sterilization of liquid storage tanks and
distribution equipment
●Cleaning and sterilizing process piping
systems
●Powering sterilizers and autoclaves
Canadian Registration # 0C0591.9
845.778.5566 ● Fax: 845.778.7123 ●
www.nicholsonsteamtrap.com
83
Connections: 1/2" – 1" Screwed
TYPE D50
STAINLESS STEEL
STEAM PRESSURE
REDUCING VALVE
SPECIFICATION
Valve shall be self operated, requiring no external energy source.
Valve shall operate quickly and provide dead end shutoff. Valve
shall have a stainless steel body and be rated 300 psi at 420°F.
Valve trim material shall be stainless steel. Valve shall have a
standard aspirator to allow for adjustment of operation.
MAXIMUM
OPERA TING CONDITIONS
PMO: Max. Operating Pressure 300 psig (20.7 barg)
TMO: Max. Operating Temperature 420°F (216°C)
PMA: Max. Allowable Pressure 300 psig (20.7 barg)
TMA: Max. Allowable Temperature 420°F (216°C)
M
ATERIALS OF CONSTRUCTION
Body ……………………………………ASTM 743 CF-8M
Stem ……………………304 St. Stl ASTM 276 Cond. A
Disc ………………………316 St. Stl. ASTM 276 Cond. A
Seat ………………………304 St. Stl ASTM 276 Cond. A
Gasket…………………………………………………Teflon
Diaphragm ………………304 St. Stl ASTM 276 Cond. A
Spring …………………………………………302 St. Stl.
SPRING RANGES
3-15 psig
10-30 psig
30-140 psig
Rated Steam Capacity Tables (lbs./hr)
Dimensions
Size
Dimensions, Inches (mm)
Weight
A B C D lbs (kg)
1
/2"51
5
/8 51/2 47/8 8
(13) (127) (41) (140) (124) (3.6)
3
/4", 1" 55/8 21/4 61/2 77/16 22
(19, 25) (143) (57) (165) (191) (10)
PSI IN 10 20 30 40 50 75 100 125 150 175 200 250 60 75 85 100 125 150 175
PSI OUT 5 10 10 30 30 30 30 30 30 30 30 30 50 50 50 50 50 50 50
1/2" 41 68 100 87 130 200 255 315 370 425 480 595 115 190 230 280 340 405 465
3/4" 59 97 145 125 185 290 370 450 530 615 695 855 165 275 335 410 500 590 675
1" 80 130 195 170 250 390 495 605 715 825 930 1150 250 420 510 625 760 895 1030
200 250
50 50
525 650
765 945
1170 1440
PSI IN 85 100 125 150 175 200 225 250 110 125 150 200 225 250 135 150 175
PSI OUT 75 75 75 75 75 75 75 75 100 100 100 100 100 100 125 125 125
1/2" 130 215 325 405 465 525 585 650 190 310 460 675 755 830 210 340 500
3/4" 190 315 470 590 675 765 855 945 310 500 745 1095 1220 1350 340 550 810
1" 290 480 720 895 1030 1170 1300 1440 380 620 920 1350 1510 1670 420 680 995
200 225 250 160 175 200 225 250
125 125 125 140 140 140 140 140
635 755 830 315 425 580 710 835
1030 1230 1350 510 690 940 1150 1350
1270 1510 1670 630 855 1160 1420 1670
3
/4" VALVE DROOP CHART*
35
25
15
10
5
0
DROOP, PSIG
REGULATOR CAPACITY IN PERCENT
*Droop for other sizes similar
0102030405060708090100
30-140
10-30
3-15
Rated Flow
Coefficients (Cv)
VALVE SIZE
1
/
2"
3
/
4"1"
2.2 3.3 4.9
C
A
D
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