安全阀主要被广泛应用于：蒸汽锅炉、液化石油气汽车槽车或液化石油气铁路罐车、采油井、蒸汽发电设备的高压旁路、压力管道、压力容器等。安全阀一般按结构形式分为弹簧式安全阀和杠杆式安全阀、脉冲式安全阀，其中弹簧式安全阀应用Zui为普遍;按连接方式分为螺纹安全阀和法兰安全阀。安全阀口径一般都不大，常用的都在DN15mm-DN80mm之间，超过150mm一般都称为大口径安全阀。
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：
4WE10A20B/OFAG24N 4WE10A20B/OFAW220-50N
4WE10A31B/CG24N9Z5L 4WE10A31B/CW220-50N9Z5L
4WE10B31B/CG24N9Z4 4WE10B31B/CG24N9Z5
4WE10B31B/CG24N9Z5L 4WE10B31B/CG24NZ4
4WE10B31B/CG24NZ5 4WE10B31B/CG24NZ5L
4WE10B31B/CW220-50N9Z4 4WE10B31B/CW220-50N9Z5
4WE10B31B/CW220-50N9Z5L 4WE10B31B/CW220-50NZ4
4WE10B31B/CW220-50NZ5 4WE10B31B/CW220-50NZ5L
4WE10B31B/OFCG24N9Z5L 4WE10B31B/OFCW220-50N9Z5L
4WE10C20B/OFAG24N 4WE10C20B/OFAW220-50N
4WE10C31B/CG24N9Z4 4WE10C31B/CG24N9Z5
4WE10C31B/CG24N9Z5L 4WE10C31B/CG24NZ4
4WE10C31B/CG24NZ5 4WE10C31B/CG24NZ5L
4WE10C31B/CW220-50N9Z4 4WE10C31B/CW220-50N9Z5
4WE10C31B/CW220-50N9Z5L 4WE10C31B/CW220-50NZ4
4WE10C31B/CW220-50NZ5 4WE10C31B/CW220-50NZ5L
4WE10D31B/CG24N9Z4 4WE10D31B/CG24N9Z5
4WE10D31B/CG24N9Z5L 4WE10D31B/CG24NZ4
4WE10D31B/CG24NZ5 4WE10D31B/CG24NZ5L