When the gate valve is closed, the sealing surface can be sealed only by the medium pressure, that is, the sealing surface of the shutter is pressed against the valve seat of the other side only by the medium pressure to ensure the sealing of the sealing surface, which is self-sealing.
The ball of the ball valve is floating. Under the action of the medium pressure, the ball can generate a certain displacement and press on the sealing surface at the outlet end to ensure the sealing of the outlet end.
The Onero trunnion mounted ball valve is designed according to the API6D standard and is available in two-piece and three-piece split designs. The valve can be used over a wide range of pressures and temperatures (150 LB ~ 2500 LB and -46 ~ 200 ° C).
Zhǐ huí fá kěyòng yú gěi qízhōng de yālì kěnéng shēng zhì chāoguò xìtǒng yā de fǔzhù xìtǒng tígōng bǔjǐ de guǎn lùshàng. Zhǐ huí fá zhǔyào kě fēn wéi xuán qǐ shì zhǐ huí fá (yī zhòngxīn xuánzhuǎn) yǔ shēngjiàng shì zhǐ huí fá (yán zhóuxiàn yídòng).
The check valve can be used to supply a line in which the pressure may rise to an auxiliary system that exceeds the system pressure.