Data Sheet

Bulletin 71.1:1305
2

Figure 3 provides 1305 Series regulator capacities.
The initial setting was made with an initial inlet
pressure of 1000 psig (69,0 bar) and then the inlet
pressure was varied to obtain the different capacity
curves. To determine capacities 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. Then, if capacity is desired in normal
1. Type 1305C regulators have three spring ranges.
2. Type 1305D regulators have one spring range.
3. The pressure/temperature limits in this Bulletin and any applicable code limitations should not be exceeded.

cubic meters per hour (Nm
3
/h) at 0°C and 1,01325 bar,
multiply SCFH obtained in Figure 3 by 0.0268.
To determine wide-open ow capacity for relief valve
sizing of 0.6 specic gravity gas at temperature of
60°F, use the equation below for critical pressure
drops (absolute outlet pressure equal to one-half or
less than one-half the absolute inlet pressure).



g
(1.29)



(1)
: 1/4 NPT outlet connection
and 1 NPT inlet adaptor connection

(2)
: 1/4 NPT outlet connection
and 1 NPT inlet adaptor connection

(3)
4000 psig (276 bar)


With Spring 1D387227022 (Blue):
0 to 75 psig (0 to 5,2 bar)
With Spring 1B788527022 (Silver):
0 to 150 psig (0 to 10,3 bar)
With Spring 1D465127142 (Red):
0 to 225 psig (0 to 15,5 bar)
 200 to 500 psig (13,8 to 34,5 bar)

 250 psig (17,2 bar)
 550 psig (37,9 bar)

5/64-inch (2,0 mm)

See Capacity Information and Figure 3


g
: 5.5

1
: 38.5

 416 Stainless steel
 416 Stainless steel
 Brass
 Brass
416 Stainless steel
 416 Stainless steel
 Nylon (PA)
O-Rings: Nitrile (NBR)
Spring: Zinc-plated steel
NACE Construction
 316 Stainless steel
 416 Stainless steel
 Brass
 Brass
 316 Stainless steel
 316 Stainless steel
 Nylon (PA)
O-Rings: Nitrile (NBR)
Spring: Zinc-plated steel

-20° to 200°F (-29° to 93°C)

Outlet pressure adjusted by turning set screw

Outlet pressure registers internally under diaphragm

6 pounds (3 kg)
Options
1/4 NPT connection for optional reduced
pressure gauge or relief valve