Pressure Relief Valve, Piston Style, Brass, 0 - 300 PSI, 3/4" MPT Inlet, 3/4" FPT Outlet

Extra Sensitive Pressure Control - Standard design for pressures up to 700 PSI is built with two extra long, different tension Stainless springs. The lighter spring controls lower pressure settings and the stronger spring becomes operative at higher pressure settings.

Extra Large Valve Passage handles full flow of 3/4" supply line. Special inner rib construction provides flushing action around shut-off piston and springs. Prevents "salting out" of chemicals. Fast, responsive adjustment to changes in line pressure results. Pressure Setting Locks in Position and will not change due to vibration or jarring. Rated to 150° F. Buna Gaskets.