Parker’s very robust check valves series RK and RB ensure a reliable operation even at high operating pressures up to 700 bar. They are designed to be screwed into simple, threaded cavities. The connection is O-ring sealed on the 118 Deg shoulder in the mounting cavity. The valve body is supplied as a unit, with a spring loaded, hardened and polished semisphere of stainless bearing steel inside. The seat is also hardened and ground. Markets: – Industrial Features/Benefits: – Proven, solid design – very good wear behaviour – Zero leakage in closed position – ensures reliable operation – Short delivery time – no warehousing necessary – Two variations: – RK: mounted in the blocked direction – RB: mounted in open flow direction Applications: – Suitable for general hydraulic applications