VICKERS威(wei)格(ge)士ST307-350-B壓(ya)力開(kai)關(guān)(guan)是當系(xi)統(tǒng)(tong)內(nèi)(nei)壓(ya)力高(gao)於(yu)或(huo)低於(yu)額(e)定的(de)安全(quan)壓(ya)力時,感(gan)應(ying)器內(nèi)(nei)碟片瞬(shun)時發(fā)生(sheng)移動(dong),通過(guo)連接導桿推動(dong)開關(guān)(guan)接頭(tou)接(jie)通(tong)或(huo)斷開(kai),當壓(ya)力降至(zhi)或(huo)升額(e)定的(de)恢(hui)復值(zhi)時,碟(die)片瞬(shun)時復(fu)位(wei),開關(guān)(guan)自動(dong)復位(wei),或(huo)者簡單的(de)說(shuo)是(shi)當(dang)被(bei)測壓(ya)力超(chao)過額(e)定值(zhi)時,彈(dan)性(xing)元(yuan)件的(de)自(zi)由(you)端(duan)產(chǎn)(chan)生(sheng)位(wei)移,直(zhi)接或(huo)經(jīng)過比較(jiao)後(hou)推動(dong)開關(guān)(guan)元(yuan)件,改變開(kai)關(guān)(guan)元(yuan)件的(de)通(tong)斷(duan)狀(zhuang)態(tài)(tai),達(da)到(dao)控制被(bei)測壓(ya)力的(de)目(mu)的(de)