平板闸阀的结构特点

译文：

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原文：
Structural characteristics of flat gate valve 1, there are two floating slab gate valve seat, each seat is designed to flow in both directions when the media can seal, so not only can achieve a two-way valve plate seal and can import and export the same time seal, valve housings " O "-ring seal and spring preload structure of the floating valve seat, when the thermal expansion valve, causing the pressure in the chamber greater than the pipeline Resilient Seated Gate Valves pressure, the role of media on both sides of the pressure difference in the seat will float valve seat pushed away from the gate, so that the pressure in the chamber through the gate and the valve seat gap between the vent into the pipeline, thus effectively protecting the safety valve, and the structure of the opening and closing moments for the general public and the valve 1 / 2 , can reach easily open and close the valve. 2, valve seat sealing surface inlaid with PTFE, a PTFE on metal and metal to metal double seal, PTFE sealing surface with a clear role in addition to gate. Metal on metal seal has a strong seal, resistance to erosion of pipeline with a variety of suspended particles Non rising stem resilient seated gate valvesin the medium will not have any impact on the seal pair to ensure no leakage, fully automatic compensation for wear of the sealing surface, at high temperature under the gate will not expand and get stuck, and where applicable to the regular switch. 3, flat gate valve of the valve body and valve cover design of the grease valve, sealing grease on the grease through the valve body can enter the valve seat sealing surface, play a secondary seal, joint sealing more reliable, zero leakage, Seal oil through the valve cover of the grease through the fill valve to the stem and separated into rings play a secondary seal between the role of filler, so that reliable, zero leakage sealing. 4, plate gate valve with Rising stem resilient seated gate valvesdiversion hole, whether full-or full closing board always coincide with the sealing surface, sealing surface to be protected from direct scouring medium, thus prolonging the service life. Valves fully open, the channel smooth straight line, stream shade coefficient is extremely small, no pressure loss, can pass the ball clean wool pipeline. 5, flat gate valve is sealed and exposed stem from the shield protection to prevent external impurities into gear, the valve is equipped with a visual indication rod, to indicate the valve open and closed. 6, plate gate valve as the leading pipeline products, as product tightness, high reliability and low manufacturing costs has been widely used.