Overhead valve of pulp digester
A digester and pulp technology, which is applied to valve devices, cocks including cut-off devices, engine components, etc., can solve the problems of poor sealing performance, poor working reliability, easy leakage, etc., and achieve good sealing performance, stable and reliable operation, The effect of improving sealing performance
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[0014] like figure 1 The pulp digester top valve shown includes a valve body 1, a valve seat 8, a valve stem 12, a ball 6, a valve cover 4, seals and mounting parts, the valve seat 8 is fixedly installed in the inlet channel of the valve body 1, and the ball 6 Floating installation is adopted, and the hard alloy sealing surface is surfacing on the valve seat 8. The hard alloy sealing surface has a sealing curved surface that cooperates with the sealing surface of the ball 6. The ball 6 is fixedly connected with the valve stem 12, and the valve stem 6 is connected to the valve cover. Between 4 there is a sleeve bearing 9 and a sealing device, the sealing device is composed of a sealing packing 10 pressed into the packing chamber between the bonnet 4, the valve stem 12 and the sleeve bearing 9 through the pressure ring 11. The valve seat 8 is embedded in the annular vertical groove on the side wall of the inlet passage of the valve body 1, and the inner groove wall 20 of the ann...
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