NSEN yakonza ma valve awiri, kuphatikizapo ma valve a 150LB ndi 600LB, ndipo onse awiri apambana mayeso a moto.

Chifukwa chake, satifiketi ya API607 yomwe yapezeka pano ikhoza kuphimba mzere wonse wazinthu, kuyambira kupsinjika kwa 150LB mpaka 900LB ndi kukula kwa 4″ mpaka 8″ ndi kukulirapo.

Pali mitundu iwiri ya satifiketi yoteteza moto: API6FA ndi API607. Yoyamba imagwiritsidwa ntchito pa mavavu okhazikika a API 6A, ndipo yachiwiri imagwiritsidwa ntchito makamaka pa mavavu ogwirira ntchito a madigiri 90 monga mavavu a gulugufe ndi mavavu a mpira.

Malinga ndi muyezo wa API607, valavu yoyesedwayo iyenera kuyaka pamoto wa 750℃ ~ 1000℃ kwa mphindi 30, kenako imachita mayeso a 1.5MPA ndi 0.2MPA valavu ikazizira.

Mukamaliza mayeso omwe ali pamwambapa, mayeso ena ogwirira ntchito amafunika.

Valavu imatha kupambana mayesowo pokhapokha ngati kutayikira koyezedwa kuli mkati mwa muyezo wa mayeso onse omwe ali pamwambapa.