安全阀在系统中起安全保护作用。当系统压力超过规定值时，安全阀打开，将系统中的一部分气体/流体排入大气/管道外，使系统压力不超过允许值，从而保证系统不因压力过高而发生事故。
北京华德液压全系列 具体型号及报价请联系客服
北京华德换向阀部分型号如下：
4WE10F31B/CW220-50N9Z4 4WE10F31B/CW220-50N9Z5
4WE10F31B/CW220-50N9Z5L 4WE10F31B/CW220-50NZ4
4WE10F31B/CW220-50NZ5 4WE10F31B/CW220-50NZ5L
4WE10G20B/AG24N 4WE10G20B/AW220-50
4WE10G20B/OAG24N 4WE10G20B/OAW220-50N
4WE10G20B/OFAG24N 4WE10G20B/OFAW220-50N
4WE10G31B/CG24N9Z4 4WE10G31B/CG24N9Z5
4WE10G31B/CG24N9Z5L 4WE10G31B/CG24NZ4
4WE10G31B/CG24NZ5 4WE10G31B/CG24NZ5L
4WE10G31B/CW220-50N9Z4 4WE10G31B/CW220-50N9Z5
4WE10G31B/CW220-50N9Z5L 4WE10G31B/CW220-50NZ4
4WE10G31B/CW220-50NZ5 4WE10G31B/CW220-50NZ5L
4WE10H20B/OFAG24N 4WE10H20B/OFAW220-50N
4WE10H31B/CG24N9Z4 4WE10H31B/CG24N9Z5
4WE10H31B/CG24N9Z5L 4WE10H31B/CG24NZ4
4WE10H31B/CG24NZ5 4WE10H31B/CG24NZ5L
4WE10H31B/CW220-50N9Z4 4WE10H31B/CW220-50N9Z5
4WE10H31B/CW220-50N9Z5L 4WE10H31B/CW220-50NZ4
4WE10H31B/CW220-50NZ5 4WE10H31B/CW220-50NZ5L
4WE10H31B/OFCG24N9Z4 4WE10H31B/OFCG24N9Z5
4WE10H31B/OFCG24N9Z5L 4WE10H31B/OFCG24NZ4
4WE10H31B/OFCG24NZ5 4WE10H31B/OFCG24NZ5L
4WE10H31B/OFCW220-50N9Z4 4WE10H31B/OFCW220-50N9Z5