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243-12-2
User Manual
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Sensus 243-12-4, 243-12-1, 243-12-2, 243, 243-12-6 User Manual

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Model 243
Service Regulators
R-1306
Rev. 10
243 Service Regulators
These large capacity service regulators are designed and built for commercial, industrial and gas distribution work. They are right at home in such places as factories and foundries, district regulator stations, commercial laundries and laundromats, motels-hotels and apartments, bakeries, restaurants, schools, churches and hospitals.
The versatile 243 is used for all kinds of gas fueled equipment . . .boilers, burners, furnaces, ovens, heaters, kilns, engines, air conditioners, etc.
Remarkable field versatility results from the union connection between the fully interchangeable bodies and diaphragm-case
Basic Models
243-12
Model Numbers
243-12-1 243-12-2 243-12-4 243-12-6
Standard* Regulator Regulator with Internal Relief Valve (IRV) Regulator with Low Pressure Cut-Off (LPCO) Regulator with both IRV and LPCO High Pressure Regulator Pressure Loaded Regulator
Outlet Pressure Ranges and Springs
For additional information on IRV refer to page 5. For LPCO refer to page 6 *The term standard refers to non-IR
Spring Color
Red-Black
V configurations.
Blue-Black Green-Black Red Blue Green Orange-Black Orange Black Cadmium Cadmium Cadmium
t
White
tWhite is nested inside Cadmium *Model 243-8HP only
Model Pipe Size
Pipe Sizes
243-12-1 and 243-12-2
243-8-1 and 243-8-2
243-8HP
1
1
⁄4”,1⁄2”
and 2”
1
⁄4”,11⁄2”
1 and 2”
1
1
⁄4”,11⁄2”
and 2”
assemblies. They are easy to install, adjust, inspect and serv­ice in all kinds of piping arrangements.
While used primarily for natural gas services, Model 243 regu­lators perform equally well on LPG vapor, air, dry CO
, nitrogen
2
and other inert gas applications. Contact your representative for special construction which may be available for certain cor­rosive gases.
Variation
243-8
Model Numbers
243-8-1 243-8-2 243-8-4 243-8-6 243-8HP 243-8PL
Outlet Pressure Range
243-12 243-8
---
---
---
31⁄2” to 61⁄2” w.c.
1
5” to 8
⁄2” w.c.
6” to 14” w.c. 10” to 18” w.c. 12” to 28” w.c.
1 to 2 psi
1
⁄2 to 3 psi
1
1
1
⁄2 to 3 psi
---
---
31⁄2” to 61⁄2” w.c.
1
5” to 8
⁄2” w.c.
6” to 14” w.c.
---
---
12” to 28” w.c.
---
1 to 2 psi
1
⁄2 psi
2 to 4
◆
3 to 5 psi
◆
3 to 61⁄2 psi*
6 to 10 psi*
◆
◆
Model 243-8-2 (IRV) only.
Spring Part Number
143-82-021-00 143-82-021-01 143-16-021-02 143-16-021-03 143-16-021-04 143-16-021-05 143-16-021-11 143-16-021-06 143-16-021-07 143-16-021-08 143-16-021-08 143-16-021-08 143-16-021-13
Temperature Limits
The Model 243 Regulator may be used for flowing gas temperatures from -20
o
F to 150oF.
Buried Service
The Model 243 Regulator is not recommended for buried service.
2
Copyright 2007, Sensus Metering Systems
Maximum Inlet Pressure, psig
*External Control Regulator Only
Regulator
Model
and Size
11⁄4”, 243-12
11⁄2”, 243-12
2”, 243-12 11⁄4”, 243-8 11⁄2”, 243-8
2”, 243-8 11⁄4”, 243-8HP 11⁄2”, 243-8HP
2”, 243-8HP
11⁄4” 30
15 15 15
1
3
3
40
40
3
⁄4”
o
10
-
60
-
60
60
­40
­40
40
­40
-
-
40
⁄2”
⁄4”
o
o
10
100 100 100
80 80 80 80 80 80
10
125
125
125
100
100
100
100
100
*11⁄4”
o
10
-
-
-
-
-
-
25 25 25
1”
25 25 25
25 25
25 25
*1”
o
o
10
30
40 40 40
-
-
-
-
-
-
-
-
o
30
-
-
-
-
-
-
1
⁄8”
⁄4”
10
125 125 125 125 125 125 125 125 125
.207”
o
10
-
-
­125 125
-
-
-
-
o
o
Fixed Factor billing
Regulator accuracy is essen­tial to measurement accuracy, and because the 243 is so precise, it is ideal for Pres­sure-Factor Measurement, Pressure Compensated Metering, Fixed Factor Billing, etc.
The table below gives the pressure accuracies obtain­able with 243-12 and 243-8 regulators at the capacities in the tables on pages 8 to 19.
Set Point
6” w.c. 7” w.c.
11” w.c.
.c.
18” w
1psi 1psi 2psi 3psi 3psi
The 243 will hold outlet pres­sure within the indicated per­centage limits from set flow (250 scfh) to the flows given in the capacity tables. Percent­ages are all based on absolute pressure using 14.4 psia as atmospheric.
Droop
1” w.c. 1” w.c. 2” w.c.
.c.
3” w
0.3 psi
0.2 psi
0.6 psi
0.3 psi
0.6 psi
As an example, referring to page 10, a 11⁄2” Model 243-12- 2 with 1” orifice, 30o, valve, 15 psig inlet and 11” w.c. set­point (green spring) at 2” w.c. droop has a gas capacity of 9800 scfh. Per the below table, this regulator at these conditions will hold outlet pressure at 11” w.c. = 1⁄2% (2” w.c.) from 250 to 9800 scfh (based on absolute pressure).
For higher outlet pressures, greater capacities, increased accuracies, and excessive inlet pressure variations, use the 243-RPC pilot operated regulator (see page 7).
Accuracy
+ 1⁄2% and -1⁄2%
1
+
⁄2% and -1⁄2% + 1⁄2% and -1⁄2% + 1% and -1% + 1% and -2%
+ 1% and -11⁄2%
+ 1% and -4% + 1% and -2%
+ 1% and -31⁄2%
3
Construction and Design Features
Model 243-8-1
2-Way Vent Valve
• Fast Response on Rapid Load Change
Vent
1” NPT
•
Interchangeable Diaphragm Assemblies
4 Bolt Union Connection
Easily Removable, Fast Off and On
• Full 360
•
Easy Access for Valve Inspection
•
o
otation for Best
R
iaphragm Assembly Position
D
nd Servicing
a
Molded Valve
Buna-N Disc in
• luminum Holder
A
Model 243-12-1 Travel Stop
Diaphragm
• Buna-N with Nylon Fabric Reinforcement
Die Cast Aluminum Alloy Diaphragm Case
• Light Weight
• High Strength
• Corrosion Resistant
Interchangeable Brass Orifices
A travel stop is located in the 243-12-1 and the 243-12-4 to provide overpressurization protection.
Cast Iron Bodies
(ASTM A126-81 Class B)
Pipe Sizes
2”, 11⁄2”, 11⁄4” NPT Screwed*
2” Flanged ANSI 125
*Can also be furnished with British Standard Threads (BST)
Caution: Turn gas on slowly. If an outlet stop valve is used, it should be opened first. Do not overload the diaphragm with a sudden surge of inlet pressure. Monitor the outlet pressure during start-up to prevent an outlet pressure overload. Refer to RM-1306 for
4
more detailed start-up procedures.
Operation of the Internal Relief Valve
The internal relief valve is optional (refer to Basic Models Table, page 2).
Often called an “IRV”, it is built into the center of the diaphragm assembly as shown in the adjoining sketch and works in essentially the same way as standard relief valves.
It opens when outlet pressure exceeds the setpoint by approximately 9” w.c. thereby allowing excess gas to escape through the vent to atmosphere. An optional spring is available on the 243­8-2 for relieving at approxi­mately 20” w.c. above set point. A cross-section of a complete 243 with IRV is shown on page 6.
Performance is given on the curves at the right. The IRV will prevent the outlet pres­sure from exceeding the value shown by the curves upon regulator failure at the condi­tions specified.
The IRV is a proven design of quality construction. Within its capacity limits it adds a meas­ure of safety protection to the outstanding and dependable performance of the 243.
, like any other relief valve, must be sized carefully
Caution: Note that an IR exceed the maximum safe limit it is essential to provide an additional relief valve carefully sized to handle the dif
V
. If the curves indicate that outlet pressure can
ference.
5
243 Variations
Internal Relief Valve
The 243 is available with an internal relief valve (IRV). It’s a built-in safety device for providing a limited level of overpressur­ization protection.
Like any relief valve, an IRV must be carefully sized.
ore complete description plus performance data is given on
M page 5. For Basic Models refer to the table on page 2.
Internal Relief valves are not available in the high pressure Model 243-8HP
Low Pressure Cut-Off
The low pressure cut-off (LPCO) is used for automatic gas shut­off when inlet pressure is too low for the required gas flow. Once closed, it must be manually reopened and reset.
Basic Models are given in the table at the bottom on page 2. Note: There is an LPCO version that also includes the internal relief valve.
Outlet pressures range from 4” w.c. to 30” w.c. and available ori­fices are capacities please refer to data bulletin RDS 1306-1.
1
⁄2”, 3⁄4” and 1”. For more complete information and
Pressure Loading
While pressure loading (self-operation) falls short of the remark­able accuracy inherent in the pilot operated regulator (relay­operation) it still does a good job. And the pressure loaded 243­8PL has a performance background of many years of depend­able, accurate pressure control.
1
Its outlet range is 3 to 35 psig. Pipe sizes are 1 It is available arranged either bleed to atmosphere or bleed to line. Capacities range to over 50,000 scfh.
⁄4”, 11⁄2” and 2”.
6
Monitoring and External Control Line
This 243 is used for the first regulator (upstream regulator) in a monitor set or for other applications requiring an external down­stream control line.
A throat block with an o-ring stem seal isolates the lower
iaphragm chamber which has a
d
xternal control line.
e
Use of this regulator for monitoring is shown on page 20. Capacities with the external control line are provided on pages 12 and 13.
1
FNPT connection for the
⁄2”
Pilot Operated Regulator
The 243-RPC is a genuine pilot operated regulator. It works on exactly the same relay-operation principle as the widely used models 1100 and 1200, and the 441-VPC.
Like its bigger brothers, it not only provides remarkably precise pressure regulation but it maintains that high level of accuracy even for wide variations in inlet pressure.
1
The 243-RPC can be used for any outlet pressure from 3 to 35 psig with capacity ranging as high as 75,000 scfh.
For detailed information please refer to Bulletin R-1343.
⁄2” w.c.
7
Model 243 Capacity Tables
2” Models 243-12-1 and 243-12-2 in SCFH of Natural Gas
Outlet Pressure
and Spring
Set Point 6” w.c. 1” w.c. Droop Red Spring 31⁄2” to 61⁄2” w.c.
43-16-021-03
1
Inlet
Pressure
psi
1
⁄2 1 2 5
10 15
1
⁄4”1”3⁄4”
1
o
30
2400 4000
6400 11000 13000 14000
25 40 60
80 100 125
1
2000
10
15
⁄2
3400
1
6000
2
11000
5
12500 14000
Set Point 7” w.c. 1” w.c. Droop Blue Spring 5” to 81⁄2” w.c.
143-16-021-04
25
40
60
80 100 125
3400
10
15
1
5600
2
10500
5
13000 14000
Set Point 11” w.c. 2” w.c. Droop Green Spring 6” to 14” w.c.
143-16-021-05
25
40
60
80 100 125
Last capacity figure in each group indicates maximum allowable inlet pressure (except for emergency conditions). Heavy stepped line indicates the recommended maximum capacity and inlet pressure for each orifice for operation within the
optimum performance
range.
Orifice Size and Valve Angle
o
30
2200 3600
6000 11000 15000 15000 15000
1800
3000
5600 11000 14000 15000 15000
3000
4700
9000 13000 14000 15000
(0.6 Specific Gravity - 14.65 psia - 60ºF)
30
1500 2700 4500
8200 12500 15000 20000 20000
3
o
⁄4”
o
10
1250 2100 3800 6500
9000 10300 11500 13000 15000
1
⁄2”
o
10
800 1300 2200 3800 5700 7100 9500
13000 13000 13000 13000
3
⁄8”
10
500
850 1400 2300 3300 4000 5300 7500
10000 12000 12000
12000 1400 2200 4000 8000
12000 15000 20000 20000
1100 2000 3200 6000
8400 10000 11500 13500 15000
700 1200 2000 3700 5600 7100 9500
12000 13000 13000 13000
500
750 1250 2100 3300 4000 5300 7500
10000 12000 12000
12000 2100 3700 7800
12000 15000 20000 20000
1950 3400 6900
9200 10500 12000 14500 15500
1150 2000 3500 5500 7000
9500 12500 13000 14000 14000
750 1200 2100 3200 4000 5300 7500
10000 12000 12000 12000
1
o
⁄4”
o
10
400
600 1000 1500 1750 2400 3300 4500 5700 7000 8000
400
600 1000 1400 1750 2400 3200 4400 5600 7000 8000
400
600 1000 1600 1800 2400 3200 4400 5600 7000 8000
Note: The performance data is based on normal testing at 70ºF flowing temperature.
8
Changes in performance can occur at extreme low flowing temperatures.
Model 243 Capacity Tables
2” Models 243-12-1 and 243-12-2 in SCFH of Natural Gas (0.6 Specific Gravity - 14.65 psia - 60
Outlet Pressure
and Spring
Set Point 18” w.c. 3” w.c. Droop Orange Spring 12” to 28” w.c.
43-16-021-06
1
Inlet
Pressure
psi
1 2
5 10 15
1
⁄4”1”3⁄4”
1
o
30
2500 4200
8000 12000 13500
25 40 60
80 100 125
6500
10
15
25
40
2
8000
5
9000
12000
Set Point 1 psi
0.31 psi Droop Orange Spring 12” to 28” w.c.
143-16-021-06
60
80 100 125
3350
10
15
25
2
6600
5
11000
13000
Set Point 1 psi
0.2 psi Droop Black Spring 1 to 2 psi
143-16-021-07
40
60
80 100 125
8200
Set Point 2 psi
0.6 psi Droop Cadmium Spring 11⁄2 to 3 psi
143-16-021-08
10
15
25
40
60
5
12500 15500
80 100 125
3500
Set Point 3 psi
0.35 psi Droop Cadmium Spring 11⁄2 to 3 psi
143-16-021-08
10
15
25
40
60
5
8000
10500
80 100 125
Last capacity figure in each group indicates maximum allowable inlet pressure (except for emergency conditions). Heavy stepped line indicates the recommended maximum capacity and inlet pressure for each orifice for operation within the
optimum performance
range.
Orifice Size and Valve Angle
o
30
2000 3400
7100 12000 14500 16500
o
30
1400 2700
5600 10500 15000 20000 20000
5000 7500
8500 11000 13500
4000 6000
8000 10000 12500 14000
3000
5900 10000 12000 15000
2000 4200 7600
9300 16500 20000
7400 11300 14500 18000
5200
8700 11500 16500 20000
3000
7000 10000 11500
2000 5500 8000 9800
21500
3
⁄4”
10
1200 2400 4700 7500
9500 11500 13500 15000
4000
6000
8000 10000 11500 13000 15000
1900
3900
6500
8300 11000 14000 15500
4800
7800 10000 13500 16500 16500
1800
5000
7000
9000 20000 21000
1
o
⁄2”
o
10
950 1500 2800 4800 6500 9200
12000 13000 14000 14000
3
⁄8”
10
650 1000 1800 2900 3900 5300 7500
10000 12000 12000
12000 2000 4000 5500 7000 9500
11000 13500 15000 16000
1300 2200 3000 4000 5500
7400 10000 13000 14000 14000
1200 2400 4100 5600
8500 12500 13000 14000 14000
1000 1600 2800 3800 5300
7500 10000 12000 12000 12000
2900 4800 6500
9000 12500 15500 16000 16000
1900 3000 3800 5300
7600 10000 12000 12000 12000
100
1400 3000 4000
5600 10500 14500 18000 20500
1 2000 3000 4500
7500 10500 13500 16400 19000
º
F) (continued)
o
1
⁄4”
10
500
950 1400 1700 2300 3200 4400 5600 7000 8000
500 1000 1400 1800 2400 3300 4500 6000 7000 8500
500 1000 1450 1700 2400 3400 4400 5600 7000 8000
900 1400 1700 2400 3400 4600 5600 7000 8000
750 1100 1600 2000 3500 4500 6000 7500 9000
o
Note: The performance data is based on normal testing at 70ºF flowing temperature. Changes in performance can occur at extreme low flowing temperatures.
9
Model 243 Capacity Tables
11⁄2” Models 243-12-1 and 243-12-2 in SCFH of Natural Gas (0.6 Specific Gravity - 14.65 psia - 60ºF)
Outlet Pressure
and Spring
Set Point 6” w.c. 1” w.c. Droop Red Spring
1
to 6
⁄2”
w.c.
31⁄2”
143-16-021-03
Inlet
Pressure
psi
1
⁄2 1 2 5
10 15
1
⁄4”1”3⁄4”
1
o
30
2000 2800 4000 6100 8200
9300 25 40 60 80
100 125
1
⁄2
10 15
1800
1
2600
2
3800
5
5700
8200
9300
Set Point 7” w.c. 1” w.c. Droop Blue Spring 5” to 81⁄2” w.c.
143-16-021-04
25 40 60 80
100 125
1
10 15 25
2700
2
4000
5
6000
8800
10000
Set Point 11“ w.c. 2” w.c. Droop Green Spring 6” to 14” w.c.
143-16-021-05
40 60 80
100 125
1
10 15 25
1800
2
3000
5
5600
8600
10000
Set Point 18” w 3” w.c. Droop Orange Spring 12” to 28” w.c.
143-16-021-06
.c.
40 60 80
100 125
Last capacity figure in each group indicates maximum allowable inlet pressure (except for emergency conditions). Heavy stepped line indicates the recommended maximum capacity and inlet pressure for each orifice for operation within the
optimum performance
range.
Orifice Size and Valve Angle
o
30
1600 2500 3500 5600 7700 9300
11000
10
1300 2100 3200 4800 6500 7400 9100
o
10500 12000
1550 2300 3300 5100 7600 9100
11000
1100 1850 2600 4200 6000 7000
8400 10000 10500
2300 3500 5600 8200 9800
11500
1900
2700
4500
6500
7700
9700
1500
1 12500
1300 2800 5200 7700 9300
1500
1
1100
2200
4200
6000
7400
9100 11000 12500
1
⁄2”
o
10
700 1200 2100 3700 5600 6800 8100 9800
11000 12000 12000
600
100
1 1900 3300 5400 6600 7800 9500
10500 11500 12000
1100 1900 3500 5500 6800 8100 9700
11500 12000 12500
800 1500 2600 4300 5800 7800 9500
11000 12500 13000
3
⁄8”
o
10
500
800 1300 2200 3100 3900 5100 7100 9300
10500 11000 11000
500
750 1250 2100 3100 3900 5100 7100 9300
10500 11000 11000
750 1200 2100 2900 3800 5100 7100 9300
10500 11000 11000
500 1000 1800 2900 3800 5100 7100 9300
10500 11000 11000
1
⁄4”
10
400
600 1000 1400 1750 2400 3200 4400 5600 7000 8000
400
600 1000 1400 1750 2400 3200 4400 5600 7000 8000
400
600 1000 1400 1750 2400 3200 4400 5600 7000 8000
500
950 1400 1750 2400 3200 4400 5600 7000 8000
o
Note: The performance data is based on normal testing at 70
10
Changes in performance can occur at extreme low flowing temperatures.
º
F flowing temperature.
Model 243 Capacity Tables
11⁄2” Models 243-12-1 and 243-12-2 in SCFH of Natural Gas (0.6 Specific Gravity - 14.65 psia - 60ºF) (cont’d.)
Outlet Pressure
and Spring
Set Point 1 psi
0.31 psi Droop Orange Spring 12” to 28” w.c.
43-16-021-06
1
Inlet
Pressure
psi
2
5 10 15 25
1
⁄4”1”3⁄4”
1
o
30
6500 8000 9000
12000
40 60 80
100 125
2800
10 15 25 40
2
5500
5
8000
10000
Set Point 1 psi
0.2 psi Droop Black Spring 1 to 2 psi
143-16-021-07
60 80
100 125
3500
Set Point 3 psi
0.35 psi Droop Cadmium Spring 11⁄2 to 3 psi
143-16-021-08
10 15 25 40 60
5
7000 9000
80
100 125
6000
Set Point 2 psi
0.6 psi Droop Cadmium Spring 11⁄2 to 3 psi
143-16-021-08
10 15 25 40 60
5
10000 13000
80
100 125
Last capacity figure in each group indicates maximum allowable inlet pressure (except for emergency conditions). Heavy stepped line indicates the recommended maximum capacity and inlet pressure for each orifice for operation within the
optimum performance
range.
Orifice Size and Valve Angle
o
30
5000 7500 8500
11500
13500
o
10
4000 6000
8000 10000 11500 13000 15000
2450 5100 7500 9100
11000
1500
3700
5700
7100
9300 11000 12500
3000 6000 8000
10000
2000
5000
7000
8000 11500 14000
5300
9300 12000 14500
4100 7100
8800 11000 13500 15000
1
⁄2”
10
2000 4000 5500 7000
9500 11000 13500 15000 16000
1200
2400
4000
5300
7300
9300 11000 12500 13000
1400
2500
3500
4800
6500
8000
9000 12000
2700
4700
6200
8600 11000 13500 15000 16000
3
o
⁄8”
o
10
1300 2200 3000 4000 5500
7400 10000 13000 14000 14000
850 1600 2700 3700 5100 7100 9300
10500 11000 11000
1100 2000 2500 4500 6000 7500 8000
11000 12000
1700 2900 3800 5200 7100
10000 12000 12000 12000
1
⁄4”
10
500 1000 1400 1800 2400 3300 4500 6000 7000 8500
500
950 1400 1750 2400 3200 4600 5600 7000 8000
500 1000 1500 1900 3500 4500 6000 7000 8500
900 1400 1700 2400 3200 4600 5600 7000 8000
o
Note: The performance data is based on normal testing at 70ºF flowing temperature. Changes in performance can occur at extreme low flowing temperatures.
11
Model 243 Capacity Tables
11⁄4”, 11⁄2” and 2” Model 243-12-1 with External Control Line in SCFH of Natural Gas
(0.6 Specific Gravity - 14.65 psia - 60ºF)
Outlet Pressure
and Spring
Set Point 6” w.c. 1” w.c. Droop
ed Spring
R
1
3
⁄2” to 61⁄2” w.c.
143-16-021-03
Inlet
Pressure
psi
1
⁄2 1 2 5
10 15 25
1
1
⁄4”* 1”
o
10
2200 3600
5600 10500 15000 19000 22000
40 60
80 100 125
1
⁄2
10
15
25
2000
1
3100
2
5000
5
7800 13000 15000 20000
Set Point 7” w.c. 1” w.c. Droop Blue Spring 5” to 81⁄2” w.c.
143-16-021-04
40 60
80 100 125
1
10
15
25
3200
2
5200
5
8500 13500 16000 20000
Set Point 11 “ w.c. 2” w.c. Droop Green Spring 6” to 14” w.c.
143-16-021-05
40 60
80 100 125
Last capacity figure in each group indicates maximum allowable inlet pressure (except for emergency conditions). Heavy stepped line indicates the recommended maximum capacity and inlet pressure for each orifice for operation within the
optimum performance
* 2” Body Only.
range.
Orifice Size and Valve Angle
3
o
10
1900 3200 4700
8200 12000 16000 20000 24000
⁄4”
10
1600 2300 3500 5700
8900 12000 16000 21000
o
27000
1700 2600 3800
6500 10000 14000 17000 21000
1500 2000 3000 5000 7000
9400 13500 17000 19000
2500 4200
7200 11000 14000 17000 24000
1900 3200 5200
8000 11000 14000 21000 25000
1
⁄2”
o
10
800 1300 2000 3500 5200 6700 9000
12000 15500 17000 19000
700 1100 1700 3100 4800 6400 8500
11500 15000 17000 19000
1100 1800 3200 5000 6500 9000
12000 15000 17000 19000
3
⁄8”
o
10
500
850 1400 2200 3000 4000 5200 7500
10000 12000 13500 15000
450
750 1200 2000 2900 4000 5200 7500
10000 12000 13500 15000
700 1300 2000 3000 4000 5200 7000 9800
12000 13500 15000
1
⁄4”
10
400
600 1000 1500 1750 2400 3200 4400 5700 7000 8000
400
600 1000 1500 1750 2400 3200 4400 5700 7000 8000
350
550 1000 1500 1750 2400 3200 4400 5700 7000 8000
o
Note: The performance data is based on normal testing at 70
12
Changes in performance can occur at extreme low flowing temperatures.
º
F flowing temperature.
Model 243 Capacity Tables
11⁄4”, 11⁄2” and 2” Model 243-12-1 with External Control Line in SCFH of Natural Gas
(0.6 Specific Gravity - 14.65 psia - 60ºF) (cont’d.)
Outlet Pressure
and Spring
Set Point 18” w.c. 3” w.c. Droop Orange Spring 12” to 28” w.c.
143-16-021-06
Inlet
Pressure
psi
1 2
5 10 15 25
1
⁄4”* 1”
1
o
10
2400 4200
6500 11000 14500 18000
40 60
80 100 125
3500
10
15
25
40
2
7000
5
10500 14500 18000
Set Point 1 psi
0.2 psi Droop Black Spring 1 to 2 psi
143-16-021-07
60
80 100 125
8600
Set Point 2 psi
0.6 psi Droop Cadmium Spring 11⁄2 to 3 psi
143-16-021-08
10
15
25
40
60
5
13000 17500 25000
80 100 125
Last capacity figure in each group indicates maximum allowable inlet pressure (except for emergency conditions). Heavy stepped line indicates the recommended maximum capacity and inlet pressure for each orifice for operation within the
optimum performance
*2” Body Only.
range.
Orifice Size and Valve Angle
3
o
10
2000 3200 5500
8000 11000 15000 21000
⁄4”
10
1200 2000 4100 6200 8000
11500
15000
o
20000
2900
5400
8500 10500 14500 20000
1700 4000 5800
7600 10500 15000 20000
6800 10500 13500 20000 25000
5300
7500 10500 14000 20000 25000
1
⁄2”
10
900 1500 2700 4200 5800 8000
11000 15000 17000 19000
1300 2600 4000 5400 7500
10500 15000 17000 19000
2700 4500 6000 8500
12000 15000 17000 19000
3
o
⁄8”
o
10
600 1000 1600 2800 3800 5000 7000 9800
12000 13500 15000
850 1600 2800 3800 5000 7000 9800
12000 13500 15000
1900 2900 3800 5000 7000
10000 12000 13500 15000
1
⁄4”
10
300 500
950 1500 1750 2400 3200 4400 5700 7000 8000
500
950 1500 1750 2400 3200 4400 5700 7000 8000
850 1400 1750 2400 3200 4400 5700 7000 8000
o
Note: The performance data is based on normal testing at 70ºF flowing temperature. Changes in performance can occur at extreme low flowing temperatures.
13
Model 243 Capacity Tables
11⁄2” and 2” Model 243-8-1 and 243-8-2 in SCFH of Natural Gas
(0.6 Specific Gravity - 14.65 psia - 60ºF)
Outlet Pressure
and Spring
Set Point 6” w.c. 1” w.c. Droop
ed-Black Spring
R
1
3
⁄2” to 61⁄2” w.c.
143-82-021-00
Inlet
Pressure
psi
1
⁄2 1 2 5
10 15 25
1”
30
1100 1950 3200 5200 7400 9100
12500
o
40 60
80 100 125
1
⁄2
10
15
25
1000
1
1600
2
2700
5
4800 7000 9100
12500
Set Point 7” w.c. 1” w.c. Droop Blue-Black Spring 5” to 81⁄2” w.c.
143-82-021-01
40
60
80 100 125
1
10
15
25
1650
2
2700
5
4800 7000 9000
11000
Set Point 11 “ w.c. 2” w.c. Droop Green-Black Spring 6” to 14” w.c.
143-82-021-02
40
60
80 100 125
Last capacity figure in each group indicates maximum allowable inlet pressure (except for emergency conditions). Heavy stepped line indicates the recommended maximum capacity and inlet pressure for each orifice for operation within the
optimum performance
range.
Orifice Size and Valve Angle
3
⁄4”
o
10
900 1600 2400 3900 5800 7100 8700
10500
1
10
700 1050 1550 2700 4500 5800 7200 9200
1000
1
⁄2”
o
11500
750 1150 1800 3500 5400 7000 8700
10500
650
900 1350 2350 3900 5000 6600 9000
11000 11500
1150 2000 3800 5400 7400 8800
11000
1000 1400 2600 4200 5500 7500 9600
1
1000
1500
1
3
⁄8”
o
10
500
750 1000 1900 3000 3800 5100 7100 9300
10500 11000
400
650
950 1600 2500 3500 5100 7100 9300
10500 11000
650 1000 1750 2800 3600 5100 7100 9300
10500
1000
1
1
⁄4” 0.207”
o
10
350 550
950 1350 1700 2400 3200 4400 5600 7000 8000
300
450
770 1250 1700 2400 3200 4400 5600 7000 8000
300
450
900 1300 1700 2400 3200 4400 5600 7000 8000
10
350 550
900 1150 1500 2100 2900 3700 4500 5600
350
500
900 1150 1500 2100 2900 3700 4500 5600
350
600
900 1100 1500 2100 2900 3700 4500 5600
o
Note: The performance data is based on normal testing at 70
14
Changes in performance can occur at extreme low flowing temperatures.
º
F flowing temperature.
Model 243 Capacity Tables
11⁄2” Models 243-8-1 and 243-8-2 in SCFH of Natural Gas (0.6 Specific Gravity - 14.65 psia - 60ºF)
Outlet Pressure
and Spring
Set Point 18” w.c. 3” w.c. Droop Green Spring 12” to 28” w.c.
143-16-021-05
Inlet
Pressure
psi
1 2
5 10 15 25
1”
30
1500 2100 4500 6600 8800
11500
o
40 60 80
100 125
4000
10 15 25 40
2
6000
5
7500 9000
12000
Set Point 1 psi
0.31 psi Droop Green Spring 12” to 28” w.c.
143-16-021-05
60 80
100 125
2100
10 15 25 40
2
4000
5
6500 8400
11000
Set Point 1 psi
0.2 psi Droop Orange Spring 1 to 2 psi
143-16-021-06
60 80
100 125
3000
Set Point 3 psi
0.35 psi Droop Black Spring 2 to 41⁄4 psi
143-16-021-07
10 15 25 40 60
5
4000 5200 7000
80
100 125
4400
Set Point 3 psi
0.6 psi Droop Black Spring 2 to 41⁄4 psi
143-16-021-07
10 15 25 40 60
5
7100 9600
12500
80
100 125
Last capacity figure in each group indicates maximum allowable inlet pressure (except for emergency conditions). Heavy stepped line indicates the recommended maximum capacity and inlet pressure for each orifice for operation within the
optimum performance
range.
Orifice Size and Valve Angle
3
⁄4”
10
1100 1700 3400 5700 7100 9100
11000
o
1
⁄2”
10
800 1300 2000 3500 5000 7100 9300
o
11000
12000
3500 5000 7000
8000 10000 12500
1800 3500 5000 6500 8000 9500
11500
12500
1650
3200
5200
6500
8600 11000
1200 2100 3100 4400 6500 8600
10500
11500
1800
2500
4000
5200
9000
1200 1800 2850 3600 5000 8300
10000
3400
5900
7500 10500 13000
2400 3600 4800 6500
9600 12500 13500
3
⁄8”
10
550
900 1350 2400 3400 5100 7100 9400
10500 11000
1200 2200 3000 4000 5000 7000 9500
11500 12500
850 1300 2200 3000 4400 6700 9000
10500 11000
1100 1500 2000 3100 4200 6500 8500 9000
1600 2400 3400 5000 7000 9300
1000
1 12000
1
o
⁄4” 0.207”
o
10
450
850 1300 1700 2400 3200 4400 5600 7000 8000
10
350 600
850 1050 1500 2100 2900 3700 4500 5600
500 1000 1500 1850 2000 3000 4500 6000 7000 8000
450
850 1300 1700 2400 3200 4400 5600 7000 8000
550
800 1000 1500 2100 2900 3700 4500 5600
900 1000 1400 1800 2200 3000 5000 6000 8000
800 1300 1700 2400 3200 4400 5600 7000 8000
750 1000 1500 2100 2900 3700 4500 5600
o
Note: The performance data is based on normal testing at 70ºF flowing temperature. Changes in performance can occur at extreme low flowing temperatures.
15
Model 243 Capacity Tables
11⁄4” Models 243-8-1, 243-8-2, 243-12-1 and 243-12-2 in SCFH of Natural Gas
(0.6 Specific Gravity - 14.65 psia - 60ºF)
Outlet Pressure
and Spring
243-12
Set Point 6” w.c. 1” w.c. Droop
ed Spring
R
1
3
⁄2” to 6” w.c.
143-16-021-03
Set Point 7” w.c. 1” w.c. Droop Blue Spring 5” to 81⁄2” w.c.
143-16-021-04
Set Point 11 “ w.c. 2” w.c. Droop Green Spring 6” to 14” w.c.
143-16-021-05
Set Point 18” w.c. 3” w.c. Droop Orange Spring 12” to 28” w
.c.
143-16-021-06
Outlet Pressure
and Spring
243-8
Set Point 6” w.c. 1” w.c. Droop
ed-Black Spring
R
1
3
⁄2” to 61⁄2” w.c.
143-82-021-00
Inlet
Pressure
psi
1
⁄2 1 2 5
10 15 25 40
3
⁄4”
10
900 1600 2250 2500 3100 3550 4200 4200
o
60
80 100 125
1
Set Point 7” w.c. 1” w.c. Droop Blue-Black Spring 5” to 81⁄2” w.c.
143-82-021-01
⁄2 1 2 5
10 15 25 40
750 1150 1700 2300 2900 3500 4200 4800
60
80 100 125
Set Point 11 “ w.c. 2” w.c. Droop Green-Black Spring 6” to 14” w.c.
143-82-021-02
1 2
5 10 15 25 40
1150 1850 2500 2900 3700 4250
5300 60 80
100 125
Set Point 18” w.c. 3” w.c. Droop Green Spring 12” to 28” w
.c.
143-16-021-05
1 2
5 10 15 25 40
100
1 1900 2250 2950 3450 4400
5300 60 80
100 125
Last capacity figure in each group indicates maximum allowable inlet pressure (except for emergency conditions). Heavy stepped line indicates the recommended maximum capacity and inlet pressure for each orifice for operation within the
optimum performance
NOTE: 1” x 30” and 11⁄4” x 30” orifice and valve angle are available on the 11⁄4” 243-12-1 and 243-12-2 models.
range.
Orifice Size and Valve Angle
1
⁄2”
10
700 1050 1500 2200 2900 3600 3800 4100 4800 5600
o
3
⁄8”
10
500
750 1000 1900 2650 2700 3300 3800 4400 5600
o
6000
650
900 1300 1900 2600 3100 3600 4000 4600 5600
400 650
950 1600 2200 2500 3300 3800 4400 5600 6000
1000 1350 2200 2700 3950 4000 4200 4850 5850
650 1000 1750 2450 2600 3300 3800 4400 5600 6000
800 1250 1700 2250 3600 3750 4100 4800 4850
500
900 1350 2100 2450 3300 3800 4400 5600 6000
1
⁄4” 0.207”
o
10
350 550
950 1350 1700 2400 3200 4400 5600 6000 6000
300
450
770 1250 1700 2400 3200 4400 5600 6000 6000
300
450
800 1300 1700 2400 3200 4400 5600 7000 8000
450
750 1300 1700 2400 3200 4400 5600 7000 8000
10
350 550
900 1050 1500 2100 2900 3700 4500 5600
350
500
900 1050 1500 2100 2900 3700 4500 5600
350
550
900
1100 1500 2100 2900 3700 4500 5600
350 550
850 1050 1500 2100 2900 3700 4500 5600
o
Note: The performance data is based on normal testing at 70
16
Changes in performance can occur at extreme low flowing temperatures.
º
F flowing temperature.
Model 243 Capacity Tables
11⁄4” Models 243-8-1, 243-8-2, 243-12-1 and 243-12-2 in SCFH of Natural Gas
(0.6 Specific Gravity - 14.65 psia - 60ºF) (continued)
Outlet Pressure
and Spring
243-12
Set Point 1 psi
0.31 psi Droop range Spring
O 12” to 28” w.c.
143-16-021-06
Set Point 1 psi
0.2 psi Droop
Black Spring 1 to 2 psi
143-16-021-07
Set Point 3 psi
0.35 psi Droop
Cadmium Spring 11⁄2 to 3 psi
143-16-021-08
Set Point 3 psi
0.6 psi Droop
Cadmium Spring
1
1
⁄2 to 3 psi
143-16-021-08
Outlet Pressure
and Spring
243-8
Set Point 1 psi
0.31 psi Droop reen Spring
G 12” to 28” w.c.
143-16-021-05
Inlet
Pressure
psi
2
5 10 15 25 40
3
⁄4”
10
3000 4000 5000 6000 7500 8000
o
60 80
100 125
Set Point 1 psi
0.2 psi Droop Orange Spring 1 to 2 psi
143-16-021-06
2
5 10 15 25 40
1850 2100 2700 3150 4150
5300 60 80
100 125
Set Point 3 psi
0.35 psi Droop Black Spring 2 to 41⁄4 psi
143-16-021-07
5 10 15 25 40 60
1200 2000 3300 4700 6300
80
100 125
Set Point 3 psi
0.6 psi Droop Black Spring
1
2 to 4
⁄4 psi
143-16-021-07
5 10 15 25 40
2200 3600 3800 5000
6300 60 80
100 125
Last capacity figure in each group indicates maximum allowable inlet pressure (except for emergency conditions). Heavy stepped line indicates the recommended maximum capacity and inlet pressure for each orifice for operation within the
optimum performance
NOTE: 1” x 30º and 11⁄4” x 30º orifice and valve angle are available on the 11⁄4” 243-12-1 and 243-12-2 models.
range.
Orifice Size and Valve Angle
1
⁄2”
10
1800 3000 4000 5100 6400 7400 8000 8500
o
3
⁄8”
10
1200 2000 3000 3900 4500 6100 7350 8000
o
8500
1150 1700 2000 3100 3250 3800 4600 4650
850 1350 1950 2050 2850 3600 4250 5600 6000
1000 1800 2800 3300 4900 5800 6500
800 1400 1800 2300 2800 5000 6400 6500
1950 2300 3400 3900 4300 5500 5500
1650 2150 2350 3250 3700 4400 5850 6550
1
⁄4” 0.207”
o
10
500 1000 1500 1900 2200 2600 4000 5100 6500 7000
450
750 1300 1700 2400 3200 4400 5600 7000 8000
500 1000 1400 1650 2000 2800 4600 4750 5000
700 1300 1700 2400 3200 4400 5600 7000 8000
10
500
800 1000 1500 2100 2900 3700 4500 5600
750 1000 1500 2100 2900 3700 4500 5600
o
Note: The performance data is based on normal testing at 70 Changes in performance can occur at extreme low flowing temperatures.
º
F flowing temperature.
17
Model 243 Capacity Tables
2” Models 243-8-1 and 243-8-2 in SCFH of Natural Gas (0.6 Specific Gravity - 14.65 psia - 60
Outlet Pressure
and Spring
Set Point 18” w.c. 3” w.c. Droop Green Spring 12” to 28” w.c.
43-16-021-05
1
Inlet
Pressure
psi
1 2
5 10 15 25
1”
30
1500 2400 5500
9400 12000 14500
o
40 60
80 100 125
Set Point 1 psi
0.31 psi Droop Green Spring 12” to 28” w.c.
143-16-021-05
2
5 10 15 25 40
5000
8000 14000 16500 17700
60
80 100 125
Set Point 1 psi
0.2 psi Droop Orange Spring 1 to 2 psi
143-16-021-06
2
5 10 15 25
2400 4000 7000
11000
14500 40 60 80
100 125
Set Point 3 psi
0.35 psi Droop Black Spring 2 to 41⁄4 psi
143-16-021-07
5 10 15 25 40 60
2000 4000 5800 7500
80
100 125
Set Point 3 psi
0.6 psi Droop Black Spring 2 to 41⁄4 psi
143-16-021-07
5 10 15 25 40 60
4400 7600
11000
15000
80
100 125
Last capacity figure in each group indicates maximum allowable inlet pressure (except for emergency conditions). Heavy stepped line indicates the recommended maximum capacity and inlet pressure for each orifice for operation within the
optimum performance
range.
Orifice Size and Valve Angle
3
⁄4”
30
1200 1800 3700
8400 12000 17500 20000
4000
7000 12800 14000 16900 18000
1800
3400
6000
9000 15000 17500
1600
3000
4200
5200
9100
3400
6000
9000 15000 17500
o
3
⁄4”
o
10
1100 1700 3500 6000
8100 10000 12000
4000
7000 10000 13900 15000 16500
1700
3300
5400
7000 10000 12000
1600
3000
4000
5000
9000
3300
5800
7500 10500 13000
1
⁄2”
o
10
800 1250 2300 3700 5600 8200
11500 13500 14000
3000 4000 5500 7750 9000
11500 15000 17000
1200 2200 3500 4600 7400
10500 12500 13500
1400 2000 2600 3900 6500
10000 14000
2400 3600 4800 8000
11000 14000 15000
3
⁄8”
10
600
950 1400 2400 3800 5600 7400
10000 11000 12000
1000 1900 3000 4500 5500 7400
10000 13800 14000
850 1300 2200 3100 4800 7000 9500
10500 11000
1000 1400 1800 2750 5800 7500
10000 12000
1600 2400 3500 5100 7000 9600
1000
1 12000
º
F)
1
o
⁄4”
o
10
500
900 1400 1700 2400 3400 4600 5600 7000 8000
500 1000 1500 1800 2500 3200 4600 6100 7000 9000
450
900 1400 1700 2400 3400 4600 5600 7000 8000
500 1000 1500 2300 3100 4600 6000 7000 9000
800 1300 1700 2400 3400 4600 5600 7000 8000
Note: The performance data is based on normal testing at 70
18
Changes in performance can occur at extreme low flowing temperatures.
º
F flowing temperature.
Model 243 Capacity Tables
Model 243-8HP in SCFH of Natural Gas (0.6 Specific Gravity - 14.65 psia - 60ºF)
1
1
nlet
I
ressure
utlet Pressure
O
Set Point 5 psi 1 psi Droop
admium
C
pring
S
1
to 6
3
⁄2 p
43-16-021-08
1
P
psi
1
3300
10
3400
15
4400
25
5800
40
si
60
80 100 125
Set Point
psi
7
psi Droop
1 Cadmium­White
prings
S
to 10 psi
6
43-16-021-03
1
10
1
25
40
60
80
2300
5
000
3 5400 7600
100 125
10
15
25
40
60
80
5400
7400 10000 12500
et Point
S 7 psi 2 psi Droop Cadmium White Springs 6 to 10 psi
143-16-021-03
100 125
15 25 40 60 80
100
2500
4800
7200
Set Point 10 psi 1 psi Droop Cadmium­White Springs 6 to 10 psi
143-16-021-03
125
15 25 40 60
80 100 125
6000 9000
12000
Set Point 10 psi 2 psi Droop Cadmium­White Springs 6 to 10 psi
143-16-021-03
Last capacity figure in each group indicates maximum allowable inlet pressure (except for emergency conditions). Heavy stepped line indicates the recommended maximum capacity and inlet pressure for each orifice for operation within the
⁄4” Model 243-8HP
Orifice Size and Valve Angle
3
1
⁄4”
⁄2”
o
0
o
0
1
2050 3100 3650 3800 4400 4500
2000
800
2 4100 5600 7500 8800
3500 5000
7600 10000 12500 14000
2200
3500
5000
6700
7800
4000
6500
9000 12000 13000
3
⁄8”
o
0
1
2000 2200 3050 3200 4100 5300 6000
1800
200
2 3300 4800 6200 7200 8600
2500 3500 5500 7500
9500 11500 13500
1800
2800
4000
5700
6600
7800
2800
5000
7000
9400
1000
1 13000
1
⁄4”
0
1
1300 1700 2400 3200 4400 5600 7000 8000 1000
400
1 2000 2800 3800 5200 5800 7000 1400 1800 2500 3500 4800 6100 7200 8800 1200 1900 2500 3500 4600 5400 6500 1700 2500 3500 4700 6000 7000 8800
”
1
o
o
0
3
6000 8600
12000
2500
000
5 8500
8000 10500 15000
3500
6500
8500 12000
11⁄2” Model 243-8HP
Orifice Size and Valve Angle
3
⁄4”
1
5500 6500 9300
12000
1
⁄2”
o
0
o
0
1
3200 4400 6100 8500
10000
11000
000
2000
500
2 4300 6500
2300 4 6500 9500
9000
11000
5500
8000 12000 16000
3500 5000 8000
11500 15000 17500
3000 5000 8000
10500
2000 3500 5500 7500 9000
6500 10500 15000
4000
7000 10000 14000 17000
optimum performance
3
⁄8”
o
0
1
2300 3200 4800 6100
8700 10000 11000
1600
200
2
3500
5000
6500
8500 10500
2500
3500
5000
7500
9500 12500 15500
1300
2500
4300
6000
7500
9500
2500
4500
7500 10000 12000 15000
range.
1
⁄4”
0
1
1300 1700 2400 3200 4400 5600 7000 8000 1000
500
1 2000 3000 4000 5000 5500 5500 1300 1700 2300 3300 4500 5500 7000 7000 1000 1900 2500 3500 4500 6000 7000 1500 2300 3000 4500 5500 7000 9000
2” Model 243-8HP
Orifice Size and Valve Angle
3
”
1
o
o
0
3
6000 8600
13000
1
5500 6000 8200
12000
1
⁄4”
o
0
1
3200 4400 6100
8700 10000 11500
3
⁄2”
o
0
1
2400 3200 4800 6100
8700 10000 11000
1
⁄8”
⁄4”
o
0
1
1300 1700 2400 3400 4600 5600 7000 8000
2700
900
5 8600
2500
300
4 6600
10000
2100
800
2 4600 7200 9700
12000
1600
2
3600
5600
7000
9000 11500
400
1000
500
1 2000 3000 4500 5500 7000 5500
8600 12700 18600
6000
8900 13500 19000
4300 5700
8600 12500 17000 20000
2700 3800 5700
8000 10000 13500 16500
1400 1800 2400 3500 4800 6200 7300
8100 3600 6800
3000 5700 8600
2000 4000 5700 8600
10500
1800 3000 4600 6400 8400
10700
1000
1900
2800
4300
5200
6500
8000 9000
15500
6600
1000
1 16500
4800 7400
1000
1 15000 18500
3000 5000
7700 10700 13000 16000
1500 2400 3200 4800 6000 7300 9000
o
0
Note: The performance data is based on normal testing at 70ºF flowing temperature. Changes in performance can occur at extreme low flowing temperatures.
19
Maximum Emergency Pressures
NOTE: The use of an internal or external relief valve is rec-
mmended for installations
o subjected to no flow for extended periods of time, such as pilotless ignition systems. A travel stop stem is located in the 243-12-1 and 243-12-4 to provide over-pressurization protection to internal compo­nents during overpressuriza­tion.
The maximum pressure the regu­lator inlet may be subjected to under abnormal conditions with­out causing damage to the regu­lator is the maximum allowable inlet pressure (from the capacity tables, pages 8 through 19) plus 50 psi.
The maximum pressure the diaphragm may be subjected to without causing damage to the internal parts of the regulator is:
243-12-1......... set point + 3 psi
243-12-2, 243-8-1 and
243-8-2........... set point + 5 psi
243-8HP........ set point + 5 psi
Set point is defined as the outlet pressure a regulator is adjusted to deliver.
If any of the pressure limits are exceeded, the regulator must be taken out of service and inspect­ed. All damaged or otherwise unsatisfactory parts must be repaired or replaced.
The maximum pressure that can be safely contained by the diaphragm case is: 243-12-1 and
243-12-2........................ 15 psi
243-8-1 and 243-8-2...... 15 psi
243-8HP....................... 25 psi
Safely contained means no leakage as well as no bursting
Before using any of the above data, make sure this entire sec­tion is clearly understood.
Overpressurization Protection
Monitoring
Protect the downstream piping system and the regulator’s low pressure chambers against over­pressurization due to possible regulator malfunction or failure to
A monitor set consists of two reg­ulators in series as shown. The monitor is the standby. It takes control if a failure in the operating regulator causes outlet pressure to exceed normal.
Either regulator may be used as the monitor. In both cases the upstream regulator must have a blocked throat and external con­trol line as shown for the 243 on page 7. Also, the control line for the upstream regulator connects into the outlet piping all the way downstream. . . that is, down­stream of the downstream regu-
.
lator
achieve positive lockup. The allowable outlet pressure is the lowest of the maximum pressures permitted by fed­eral codes, state codes, Bul­letin RDS-1498 or other
The illustration shows a typical 243 monitor set. While the downstream regulator is shown as operating and the upstream regulator is shown as the moni­tor, the two can be reversed. There are reasons for doing it one way or the other depending on user’s practice. Stop and bypass valves, not shown, like­wise would depend on user’s preference and practice.
Either way, the operating regulator is adjusted for the normal outlet pressure. The monitor is adjusted somewhat higher so it is normally full open. If a failure in the
applicable standards. The method of protection can be a relief valve, monitor regulator, shut-off device or similar mechanism.
operating regulator causes excessive increase in outlet pressure, the monitor will go into operation to hold outlet pressure at its set point.
Monitoring is an effective and dependable method of provid­ing overpressure protection. A significant advantage is that it provides the protection with­out wasting gas to atmos­phere. Refer to Bulletin RDS­1306-2 (Package monitor sets 243-DOT) for more informa tion.
When a 243 is used to monitor another 243 with an identical orifice size, the total maximum capacity through both can be figured at 70% of the rated capacity for one regulator. This applies with the monitor located upstream or down­stream.
-
Periodic Inspection: Regulators are pressure control devices with numerous moving parts sub­ject to wear that is dependent upon particular operating conditions. satisfactory operation, a periodic inspection schedule must be adhered to with the frequency of inspection determined by the severity of service and applicable laws and regulations.
20
See Bulletin RM-1306 field ser
vice instructions.
o assure continuous
T
Mounting Positions
The 243 Service Regulator can be provided in any of the posi­tions shown. Specify by posi­tion number when ordering.
CAUTION
The diaphragm case vent
ust be positioned to pro-
m tect against flooding, drain water, ice formation, traffic, tampering, etc. The vent must be protected against nest building, ani­mals, bees, insects, etc. to prevent vent blockage and minimize the chances of foreign materials from collecting in the vent side.
NOTE: If desired position is not shown use diagrams at right as guides to specify vent, diaphragm case, and body arrangement. Example: Position 105 would be D-4-Y.
Dimensions
Model
Shipping*
Weight
*
** 10” for 243-12-1 and 243-12-4, which include travel stop
***
**** ND-10 Flanges
243-12
243-8
A
14”
103⁄16”
**B
93⁄4”
­53⁄4” 71⁄2” 77⁄8” 27⁄8”
1013⁄32”
61⁄32”
11
4
⁄32”
27
lbs.
93⁄4”
53⁄4” 71⁄2” 77⁄8”
27⁄8” 8 427⁄32”
4
25
lbs.
1
B
C
1
***C
2
****C
D E F G
Add 9 lbs. for flanges on 2” body
ANSI Flanges
243-8HP
103⁄16”
-
-
123⁄4”
53⁄4” 71⁄2” 77⁄8” 27⁄8”
9
1
⁄32”
819⁄32”
427⁄32”
5
5
4
⁄32”
⁄32”
29
lbs.
CAUTION: It is the user’s responsibility to assure that all service regulator vents and/or vent lines exhaust to a non-hazardous location away from any potential sources of ignition. Refer to Bulletin
RM-1306 for more detailed information.
21
Materials of Construction
Body . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cast Iron
iaphragm Case . . . . . . . . . . . . . . . . . . . . Die Cast Aluminum Alloy
D
Diaphragm . . . . . . . . . . . . . . . . . . . Buna-N with Nylon Fabric Insert
Diaphragm Pans. . . . . . . . . . . . . . . . . . . . . . . . . . . Zinc Plated Steel
iaphragm Coupling . . . . . . . . . . . . . . . . . . . . . . . . Zinc Die Casting
D
Orifice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Brass
Valve. . . . . . . . . . . . . . . . . . . Buna-N Soft Seat in Aluminum Holder
tem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Brass
S
Lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Zinc Plated Steel
O-Rings and Tetra Seals . . . . . . . . . . . . . . . . . . . . . . . . . . . . Buna-N
djustment Spring Button & Seal Cap, Std. . . . . . . . . . . . . . . . . . . .
A
Zinc Die Casting
Adjustment Screw, 243-8HP . . . . . . . . . . . . . . . . . Zinc Plated Steel
Cover, 243-8HP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cast Iron
Seal Cap, 243-8HP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cast Iron
Full Open Capacity
Use the following formula for the full open capacity of 243 regulators.
1. Q = K Po(P
KP
2. Q = . . . . . . . . . . . . . . . . . . . . . (for greater than 1.894
1
2
). . . . . . . . . . . . . . . (for less than 1.894
1-P0
P
1
P
0
P
1
P
0
Q = maximum capacity of the regulator (in SCFH of 0.6 specific
gravity natural gas).
K = the P P
“K” factor, the regulator constant (from the table)
= absolute inlet pressure (psia).
1
= absolute outlet pressure (psia).
0
Other Cases
243 Regulators are mainly used on natural gas. However, they perform equally as well on LP gas, nitrogen, dry CO
ers. For capacities, multiply the table values on pages 8 thru 19 by the following correction factors:
, air and oth-
2
Orifice Size-in.K.207”
1
⁄4”3⁄8”1⁄2”3⁄4”1”11⁄4”
90 132 292 520 1100 1800 2480
When sizing relief valves for use with 243 regulators, use
capacity
. Do not use capacity from capacity tables pages 8
full open
through 19.
OTHER GASES CORRECTION FACTOR
Air (Specific Gravity 1.0) 0.77
Propane (Specific Gravity 1.53) 0.63
1350 BTU Propane-Air Mix (1.20) 0.71
Nitrogen (Specific Gravity 0.97) 0.79
Dry Carbon Dioxide 0.63 (Specific Gravity 1.52)
For other noncorrosive gases: CORRECTION FACTOR =
0.6
Specific Gravity
of the Gas
While used primarily on natural gas services, Model 243 regulators perform equally as well on LPG vapor, air, CO2, nitrogen and other inert gas applications. Please contact your Sensus Metering Sys­tems representative for special construction which may be avail­able for certain corrosive gases.
How to Order
Specify:
1. Pipe size and model number (page 2).
2. Screwed or flanged connections
3. Mounting position
22
4. Orifice size and valve angle.
5. Inlet pressure (also maximum and minimum if available)
6. Outlet pressure setting
7. Capacity required (scfh)
8. Type of gas (natural gas, propane, etc.)
9. Spring part number
Other Sensus Metering Systems Gas Pressure Regulators
ensus Metering Systems produces a broad product line of
S Gas Pressure Regulators which are widely used throughout the natural gas industry. These regulators are also suitable for non-corrosive industrial gas applications such as propane,
Multi-Purpose Service Regulators
Model 043-C Bulletin: TD-1309
1
⁄2”, 3⁄4”, 1”, 11⁄4” pipe sizes
Inlet pressures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .to 125 psi
Outlet pressures . . . . . . . . . . . . . . . . . . . . . 5” w.c. to 5 psi
Capacity to 3500 CFH Available with 90º angle or straight-through body. Standard with internal relief valve.
Model 143-80 Bulletin: R-1301
3
⁄4”, 1”, 11⁄4” pipe size
Inlet pressures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .to 125 psi
Outlet pressures . . . . . . . . . . . . . . . . . . . . . 3
Capacity to 2000 CFH Optional internal relief valve and low pressure cut off.
1
⁄2” w.c. to 6 psi
butane, air, nitrogen, dry CO2etc. For additional information on a particular model, please request the indicated bulletin
rom the local Sensus Metering Systems sales office, or visit
f
ur website at www.sensus.com
o
ndustrial Field Regulators
I
or intermediate to high pressure applications. Ideal on
F pipeline taps servicing plants and buildings. Appropriate for double stage reduction ahead of service regulators, and for high pressure burners and compressed air systems.
046 Bulletin: R-1312
3
⁄4”, 1”, 11⁄4” pipe sizes
Inlet pressures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .to 1000 psi
Outlet pressures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 to 200 psi
Capacity to 40,000 SCFH Optional monitor and internal relief valve.
141A Bulletin: R-1311 2” pipe size
Inlet pressures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .to 1500 psi
Outlet pressures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 to 400 psi
Capacity to 55,000 SCFH
Pilot Loaded Regulators
For intermediate and high pressure applications requir­ing precise pressure reduc­tion with minimal droop. Ideal for standard and high capaci­ty flows on burners, driers, dehydrators and compressor line. Appropriate for fixed fac­tor billing.
Sensus Metering Systems also produces Industrial and Combustion Regulators; High Pressure, High Capacity Regulators: and Safety Relief
alves. Detailed information available upon request.
V
243-RPC Bulletin: R-1343
1
1
⁄4”, 11⁄2” and 2” pipe size
Inlet pressures......to 150 psi
Outlet pressures...........3
1
w.c. to 35 psi
Capacity to 76,000 SCFH
1100 Bulletin: R-1341 Pipe Size: 2”
(screwed or flanged)
⁄2”
Inlet pressures......to 400 psi
Outlet pressures........3” w.c.
Capacity to 414,000 SCFH
1200 Bulletin: R-1342 Pipe Size: 2” (flanged)
Inlet pressures....to 1200 psi
Outlet pressures....20 to 600 psi
Capacity to 789,000 SCFH
to 100 psi
23
Sensus Metering Systems, 805 Liberty Boulevard DuBois, PA 15801 (814) 371-8000 FAX (814) 375-8460 www.sensus.com
Representatives in all principal cities.
Distributors throughout the world.
Authorized Distributor:
Sensus Metering Systems 805 Liberty Boulevard DuBois, PA 15801 www.sensus.com
NUPP 5/07 3M PRINTED IN U.S.A.
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