Extensively used in large Pipe Lines, Small Reactors/Vessels to release pressure Generated by thermal expansion.

• Auto Re-circulation on a Refueller to control the pumping pressure of Air Crafts.
• Solenoid Override or Pneumatic Override to safeguard the system. This can be operated remotely to re-circulate full flow.
• When installed in Main line, it prevents upstream pressure dropping below preset value.
• When installed on a By-Pass line, it controls main line pressure by relieving excess pressure in By-Pass/sump.
• Ideal for pump by pass to protect the downstream equipments.
• Relief pilot (F16) is normally closed due to spring tension.
• With increase in upstream pressure above set value, Pilot (F-16) opens which makes Main Valve to open fully.
• Spring Range: Standard: 20-200 psig. Optional: 5-30 psig.