Product Details: The Chelsea New 1" Pipe Thread Inline Relief Hydraulic Relief Valve is constructed from high-strength cast iron for maximum durability. It features a 1" NPT connection size and a maximum operating temperature of +200 °F. It has a maximum flow rate of 60 G.P.M and a minimum operating temperature of -40 °F. It is actuated by hydraulic pressure and features an adjustable pressure control range. It is designed with a pilot-operated relief valve and an adjustable adjustment mechanism. It has a maximum operating pressure of 2000 psi and comes with a nitrile seal material. It is designed for in-line mounting. FleetPride is your First Click in Heavy Duty®.