上密封座設(shè)計(jì)
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0 ?8 ~) C5 u; ?7 t我公司提供的所有截止閥都有倒密封設(shè)計(jì),。通常情況下,,碳鋼截止閥的閥座設(shè)計(jì)采用分離式倒密封結(jié)構(gòu) ,不銹鋼截止閥的倒密封是直接加工或者是焊后加工。當(dāng)閥門(mén)在全開(kāi)位置時(shí),,倒密封的密封面非�,?煽�,。雖然按照標(biāo)準(zhǔn) API 600中有倒密封,但這不作為在帶壓情況下更換填料的依據(jù),。 ) S& f9 D5 Q8 f. B/ E
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Back Seating Design
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All ur globe valves have the back seating design.ln most Cases,the carbon steel globe valve is fitted with a renewable back seat,For stainless steel globe valve,the back seat is machined directly in the bonnet or is machined after welding.When the globe valve is at fully open position,the sealing of the back seat can be very reliable.However,as per the requirement of API600,it is not a dvisable to add or change packing by the mean of back seating when the valve is pressure containing. |