Ivalvu yoKhuseleko oluSebenziswa yi-Pneumatic-Hydraulic: Icandelo loKhuseleko oluBalulekileyo kwiiNkqubo zoLawulo lweMithombo eDownhole
Ivalvu yokhuseleko eqhutywa yi-pneumatic-hydraulic inamacandelo amabini aphambili: ivalvu yovavanyo lwevalvu yokhuseleko kunye ne-hydraulic actuator, esebenza njengecandelo elilawulayo lenkqubo yokhuseleko engaphantsi komngxuma. Ioyile enoxinzelelo oluphezulu ingena kwigumbi eliphezulu le-actuator, icinezela indlela yentwasahlobo esezantsi ukuze ivule ivalvu. Xa isixhobo sentloko yemithombo siphantsi koxinzelelo oluyingozi, iyunithi yolawulo ifumana imiqondiso yesenzwa, ikhuphe uxinzelelo lwe-hydraulic cylinder, kwaye indlela yentwasahlobo iqhuba isiqu sevalvu ukuvala ivalvu kunye nendibano yentloko yemithombo, ukuqinisekisa ukusebenza ngokukhuselekileyo kwezixhobo zenkqubo.
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