API 6A pulagi valavu pamwamba kapena pansi lolowera pulagi vavu

Valve ya pulagi ndi gawo lofunikira lomwe limagwiritsidwa ntchito pamagetsi othamanga kwambiri popanga simenti ndi fracturing m'munda wamafuta komanso oyenera kuwongolera pamadzi othamanga kwambiri. Pokhala ndi mawonekedwe ophatikizika, kukonza kosavuta, torque yaying'ono, kutsegula mwachangu komanso kugwiritsa ntchito kosavuta, valavu ya pulagi ndi yabwino kwa simenti ndi ma fracturing manifolds.

Pankhani yogwira ntchito, valavu ya pulagi imatha kuyendetsedwa pamanja, hydraulic, kapena magetsi, kupereka kusinthasintha kuti ikwaniritse zofunikira zowongolera ndi zodziwikiratu. Kuti mugwiritse ntchito pamanja, valavu imakhala ndi gudumu lamanja kapena lever yomwe imalola kusintha kosavuta komanso kolondola kwa pulagi. Pogwiritsa ntchito makina, valavu imatha kukhala ndi makina opangira magetsi omwe amayankha zizindikiro kuchokera ku dongosolo lolamulira, zomwe zimathandiza kuti ntchito yakutali ndi yolondola.