The Actaris B31R-1-1/4 is a gas regulator featuring a 1" internal relief valve for great relief capacity. The valve has a 1/2" orifice and uses a gray spring with an outlet pressure ranging from 4.0 to 9.0" w.c (9.9 to 22.4 mbar).
The Series B31 Regulator is ideal for light commercial and industrial applications using small to medium-sized furnaces and boilers. If you are experiencing sudden on/off loads that could cause shock problems on your heating equipment, the B31 regulator is fitting for you as it is known for its quick response capabilities.
| Valve Body Size | 1-1/4" |
|---|---|
| Orifice Size | 1/2" |
| Outlet Pressure Range | 4 - 9" w.c (9.9-22.4 mbar) |
| Operating Temperature Range | -20°F to 150°F |
| Body Material | Cast Iron |
| Valve Stem | Aluminum |
| Vent Screen | Stainless Steel (16 mesh) |
| Internal Monitor Orifice | Brass |
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What circumstances might cause the line pressure on the lock-up regulator to exceed 100-125% of the set pressure? Generally, only two scenarios lead to this issue. Firstly, particularly in new installations, the absence of a strainer on the gas regulator's inlet side can allow small debris to pass through, preventing the regulator's seat from fully closing. Ensure the regulator is kept clean by installing a strainer. Secondly, in situations where the equipment's safety shutoff valves react rapidly, the lock-up regulator may not respond as swiftly, leading to an increase in gas pressure between the regulator and the shutoff valves beyond the 100-125% set pressure. Typically, when this occurs, the distance between the gas regulator and the equipment's safety shutoff valve is short, and extending this distance or piping length between the regulator and the safety shutoff valve can resolve the issue.
