The check valve allows free flow from the directional valve (port ② ) to the load (port ① ) while a direct-acting, pilot-assisted relief valve controls flow from port ① to port ② .

Pilot assist at port ③ lowers the effective setting of the relief valve at a rate determined by the pilot ratio.

Restrictive valves have no relief capacity other than as a thermal relief.Maximum setting = 280 bar.280bar Maximum recommended load pressure at maximum setting = 215 bar

Internal Leakage:0.4ml/min max. to 85% of nominal setting.

Pilot Ratio:3：1

Maximum setting pressure should be 1.3 times the maximum load induced pressure.

Temperature:-40℃ to 120℃，with standard Buna seals;

Cavity:T08-3B

Standard Ported Body：Steel rated at 420 bar（6090 psi）.