Liquid Safety Valve
Product Range
Liquid Safety Valve
Applicable Standards
- Design Standard: As per Manufacturer’s Standard
- End Connections: Flanged ends conforming to ANSI / DIN / BS / JIS / IS standards
- Testing Standard: API 527
When positioned “off the main line” on the branch connection of a tee, the valve operates as a Pressure Relief Control Valve. Under normal conditions, it remains in the closed position and responds immediately when upstream pressure exceeds the preset pilot setting, efficiently discharging excess pressure to protect the system.
When the valve is installed “in-line” between two distribution zones, it functions as a Pressure Sustaining Control Valve. If the upstream pressure drops below the preset pilot setting, the valve gradually modulates toward the closed position, maintaining the required pressure within the upstream zone.
When installed “in-line” at the pump discharge, the valve operates as a Backpressure Control Valve. If the pump discharge pressure decreases below the preset pilot setting, the valve progressively modulates toward the closed position, thereby increasing backpressure to maintain stable pump operation.
Features
- Ensures automatic re-circulation in refueller systems to effectively control aircraft fueling pressure.
- The Relief Pilot (F-16) is normally held closed by spring force.
- When positioned in the main line, it sustains upstream pressure by preventing it from dropping below the preset level.
- When installed on a bypass line, it regulates main line pressure by diverting excess pressure to the bypass or sump.
- Well-suited for pump bypass applications to protect downstream equipment from pressure fluctuations.
- Available with solenoid or pneumatic override arrangements for improved system safety, enabling remote activation for full-flow re-circulation.
- Upon upstream pressure exceeding the set value, the Pilot (F-16) actuates, causing the main valve to open completely.
- Spring Range: Standard: 20–200 psig | Optional: 5–30 psig
Applications
- Municipal water supply and distribution systems
- Aviation and aircraft fueling operations
- Sewage and wastewater treatment facilities
- General process industries
- Chemical and petrochemical processing plants