Bulletin 71.1:CP200
8
Capacity Information
Tables 6 through 23 give the CP200 Series natural
gas regulating capacities at selected inlet pressures,
outlet pressure settings and body outlet sizes. Flows
are in SCFH (60°F and 14.7 psia) and Nm³/h (0°C and
1.01325 bar) of 0.6 speci c gravity gas. To determine
equivalent capacities for air, propane, butane, or
nitrogen, multiply the capacity number in the tables by
the following appropriate conversion factor: 0.775 for
air, 0.628 for propane, 0.548 for butane, or 0.789 for
nitrogen. For gases of other speci c gravities, multiply
the given capacity by 0.775 and divide by the square
root of the appropriate speci c gravity.
The published capacities were obtained using inlet
and outlet piping the same size as the regulator
body size.
Relief Sizing
For critical fl ow:
To determine wide-open ow capacities for relief sizing
of 0.6 speci c gravity natural gas at 60°F at critical
pressure drops (absolute outlet pressure equal to
approximately one-half or less than one-half of the
absolute inlet pressure), use the following formula:
Q= P
1abs
(C
g
)(1.29)
Table 4. Outlet Pressure Ranges
OUTLET PRESSURE RANGE
(1)
PART NUMBER SPRING COLOR
SPRING WIRE DIAMETER SPRING FREE LENGTH
psig bar Inch mm Inch mm
1 to 2 69 mbar to 0.14 bar GE30199X012 Yellow Stripe 0.078 2.0 1.35 34.3
2 to 5 0.14 to 0.34 GE27213X012 Orange Stripe 0.100 2.5 1.47 37.3
5 to 10 0.34 to 0.69 GE39890X012 Black Stripe 0.114 2.9 1.47 37.3
10 to 20 0.69 to 1.4 GE30200X012 Purple Stripe 0.137 3.5 1.42 36.1
1. Oulet pressure range is controlled by 67CP Series pressure loading regulator spring.
SPRING RANGE
(1)
PART NUMBER SPRING COLOR
START-TO-DISCHARGE PRESSURE
RANGE ABOVE SETPOINT
psig bar psig mbar
1 to 2 69 mbar to 0.14 bar GE30199X012 Yellow Stripe 1 to 3.5 69 to 241
2 to 5 0.14 to 0.34 GE27213X012 Orange Stripe 1.75 to 5.5 121 to 379
5 to 10 0.34 to 0.69 GE39890X012 Black Stripe 2.5 to 6.75 172 to 465
1. Outlet pressure range is controlled by 67CP Series pressure loading regulator spring. Only the 1 to 2, 2 to 5, and 5 to 10 psig / 0.07 to 0.14; 0.14 to 0.34; and 0.34 to 0.69 bar
spring ranges are available with Token Relief.
Table 5. Token Relief Valve Start-to-Discharge Pressure Above Setpoint
For subcritical fl ow:
If pressure drops are lower than critical (absolute
outlet pressure greater than approximately one-half
the absolute inlet pressure), use the following formula
and convert according to the factors in the preceding
paragraph if necessary:
520
GT
3417
C
1
P
P
1
C
g
P
1
SIN DEG
Q =
where:
C
1
= C
g
/C
v
(see Table 3)
C
g
= Gas sizing coef cient (see Table 3)
G = Gas speci c gravity (air = 1.0)
P
1
= Regulator inlet pressure, psia
ΔP = Pressure drop across regulator, psig
Q = Gas ow rate, SCFH
T = Absolute temperature of gas at inlet, °Rankine
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