Type T289 serves as both a backpressure regulator and a high-flow relief valve with an adjustable setpoint. This dual functionality makes it effective in the monitoring of air, nitrogen, natural gas, propane and other industrial gases. A large diaphragm area and integral pitot tube booster permit quick response to excessive pressure-relief requirements. A simple, compact design allows the industrial gas backpressure regulator to be used in place of a standard relief valve for protection against overpressurization in the downstream system. 


Marsh Bellofram