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Subject: swings on a hinge or trunnion, either onto the seat to block reverse flow or off the seat to allow forward flow gen. Добрый день, есть трудности с переводом следующих 2-х предложений:A swing check valve or tilting disc check valve is check valve in which the disc, the movable part to block the flow, swings on a hinge or trunnion, either onto the seat to block reverse flow or off the seat to allow forward flow. The seat opening cross-section may be perpendicular to the centerline between the two ports or at an angle. дальше тоже не особо понимаю, но мне хотя б эти два...Даже боюсь показать,как сама перевела дабы у всех до конца дня не было коликов от смеха :) Tank pressure holding it closed is overcome by manual lift of the flapper. It then remains open until the tank drains and the flapper falls due to gravity. Another variation of this mechanism is the clapper valve, used in applications such firefighting and fire life safety systems. A hinged gate only remains open in the inflowing direction. The clapper valve often also has a spring that keeps the gate shut when there is no forward pressure.
Большое спасибо за любую помощь)
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