Gas pressure regulator specifications 121


Gas pressure regulator type 121
The Sensus type 121 gas pressure regulator is a spring-loaded regulator. The regulator is normally open. The controller has a single diaphragm with a balanced valve. This makes the controller extremely suitable for precise pressure control with fast successive changes in pressure and flow capacity. Depending on the operating conditions you can choose between a membrane box of 8 “, 12″ or 16 ” diameter. The regulator is available in connection sizes ranging from 3/4 “up to 4”.
Types
121-8, 121-12 and 121-16.
Maximum inlet pressure
The maximum inlet pressure = 4.2 barg (60 psig) for connection sizes up to 2.1 / 2 “.
The maximum inlet pressure = 2.8 barg (40 psig) for connection size 3 “.
The maximum inlet pressure = 1.0 barg (15 psig) for connection size 4 “.
Operating temperature
-28.9 – +65.5° C (-20° F +150° F).
Spring range outlet pressure
12.0 – 700.0 mbarg (with different springs).
Connection sizes
3/4 “, 1”, 1.1/4 “, 1.1/2”, 2 “, 2.1/2” NPT.
Flanged in DN50 PN10, 2 “ANSI125lbs, 3” ANSI125lbs and 4 “ANSI125lbs.
Applicable gases
Natural gas, propane, butane, air and nitrogen. Various designs are available for special (corrosive) gases.
Options
V-port, for better control at minimum flow.
For special versions that were available in the past, please contact us.