Total Valve Systems introduces ‘game-changing’ pressure relief valve
Valve and gauge application specialist Total Valve Systems has introduced patented technology in new non-reclosing pressure relief valve.
The model 6820 TRV can be reset in seconds from the field or remotely, the first of its kind to do this. Related product model 6220 is a shutdown version that shuts off when the valve reaches the set pressure or is triggered remotely.
Total Valve's engineering department has worked for a number of years to develop the ASME 'UD' certified Total Relief Valve (TRV) module, considered the 'brain' of the system.
The proprietary TRV system includes the TRV module, actuator and isolation valve, making it a reliable and accurate high flow capacity relief valve or shutdown device to help prevent downtime and catastrophic accidents. The system offers reliability for non-reclosing relief devices because it does not rely on the prediction of material failures.
No external power is required for 6820 TRV operation and its performance is not impacted by system backpressure. Module operation allows for complete control of valve set pressures at +/-2%. Options for dual sensing lines and fluid media filters are provided and the system is ideal for gas service where dirt, hydrates and high moisture levels occur in the fluid media.
Triple-offset valves are standard due to their performance and reliability across the spectrum of temperature, pressure and sealing classes. They operate from -267⁰C to 815⁰C in accordance with valve specifications. Its non-rubbing seat design offers a bubble-tight sealing performance.
Industry-proven actuation systems are integrated to the valve and TRV module. The system's design can include the use of special valve features such as accumulator tanks, thermal protection plugs and customer-specific devices. Additional systems can be added optionally to the actuator for PLC and control room remote operation. Operation can be paired to data acquisition systems for monitoring set pressures and relief points.
Also included is a test connection port for in-the-field testing. The device is a full-face design with pipe flange bolting for lug, wafer and short pattern configurations. Flange ratings are 150, 300 and 600. Set pressures are from 3-1500 psi.
The US-designed and manufactured system is available in two basic configurations: 6820 TRV-SP for single positive sensing line pressure applications, and 6820 TRV-DP for positive differential pressure applications. The system can also be used with gate and ball valves. When coupled with a ball valve, it has pigging capabilities and provides overpressure or shutdown protection.
