The Knocks DRF.31 S is a high-performance, relieving diaphragm pressure regulator designed for precise control in pneumatic systems. Engineered for use with compressed air and other neutral gases, this regulator ensures a constant output pressure, independent of input pressure fluctuations. Its robust die-cast zinc body and NBR seals provide durability and reliable operation in demanding industrial environments. The relieving function allows the regulator to vent downstream pressure if it exceeds the set point, protecting sensitive components. The ‘S’ designation typically indicates a lockable adjustment knob, preventing unauthorized or accidental changes to the pressure setting.