I-NSEN ilungiselele amasethi amabili ama-valve, okuhlanganisa ama-valve angu-150LB kanye no-600LB, futhi womabili aphumelele ukuhlolwa komlilo.

Ngakho-ke, isitifiketi se-API607 esitholakale njengamanje singamboza ngokuphelele umugqa womkhiqizo, kusukela ekucindezelweni okungu-150LB kuya ku-900LB kanye nosayizi ongu-4″ kuya ku-8″ nangaphezulu.

Kunezinhlobo ezimbili zesitifiketi sokuphepha emlilweni: i-API6FA kanye ne-API607. Esokuqala sisetshenziselwa ama-valve ajwayelekile e-API 6A, kanti esesibili sisetshenziselwa ngqo ama-valve okusebenza angama-degree angu-90 njengama-valve e-butterfly nama-valve ebhola.

Ngokwezinga le-API607, ivalvu evivinyiwe idinga ukusha elangeni elingu-750℃ ~ 1000℃ imizuzu engama-30, bese yenza ukuhlolwa okungu-1.5MPA kanye no-0.2MPA lapho ivalvu isipholile.

Ngemva kokuqeda izivivinyo ezingenhla, kudingeka olunye ukuhlolwa kokusebenza.

I-valve ingadlula ukuhlolwa kuphela uma ukuvuza okulinganisiwe kungaphakathi kobubanzi obujwayelekile bazo zonke izivivinyo ezingenhla.