特点：
     防爆型主体结构与普通型基本相同
     快关阀安装位置尽量靠近主机
     视客户现场条件，可选择侧向泄爆或顶部泄爆方式
Features：
     Explosion-proof major structure is similar to the common one.
     The installation site of fast vavle is largely close to the main engine 
     According to the installation site, two alternatives are available: side pressure releasing and top pressure releasing