排污阀

原文：
一：排污阀开启（排污过程） 1.逆时针转动手轮阀杆带动阀芯逐渐上移，密封面脱开，阀芯上的导流座逐渐移出阀座内孔，形成窄缝间隙，介质通过阀座上的对称节流孔进入阀座内部，减压阀少量介质可通过窄缝流出，逐渐降低系统压力。 2.继续逆时针转动手轮，阀芯向上运动，针型阀导流座上的节流孔移出阀座内腔，较多的介质通过导流座和阀套节流后顺利排出。 3.继续逆时针转动手轮，阀芯向上移至全开位置，此时，介质压力大大降低，大量杂质可直接从阀套节流孔处排出，并在倒置的密封座处形成涡流，调节阀不断清洁密封面，防止杂质粘附在密封面上。

二：排污阀关闭过程： 1.顺时针转动排污阀，阀杆带动阀芯下移，此时排污已结束，呼吸阀系统压力较低，阀套上的节流孔面积逐渐减小，导向套靠近阀座，并改变介质流向，介质经节流后以一定速度通过阀芯和阀做密封面，逐渐加强对密封面的清洁力度。 2.继续转动手轮，阀芯上的导流座进入阀座内孔，锻钢阀门形成窄缝节流，由于排污接近结束，介质中杂质已经较少，导向套和阀座间的窄缝阻止了残存的微小杂质流入密封面，介质通过窄缝快速流出，彻底清扫密封面，保证密封副接触时达到零泄漏。 3.继续转动手轮，阀芯和密封座接触。实现密封。

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译文：
1: sewage valve opening (discharge process) 1. Handwheel counterclockwise drive spool gradually move up the stem, sealing face torn off and the diversion valve seat gradually out of the valve seat hole, forming narrow gap, the medium through the orifice seat on the symmetry into the seat inside, a small amount ofBUTTERFLY VALVES media flow through the narrow, gradually reduce the system pressure. 2. To turn the hand wheel counterclockwise, upward movement of the spool, guide the throttle out of the seat pedestal cavity,CHECK VALVES more medium through diversion valve seat and a smooth exhaust throttle sleeve. 3. To turn the hand wheel counter-clockwise, move the spool up fully open position, this time, medium pressure greatly reduced, a large number of impurities can be set directly from the throttle valve discharge hole, and the inverted vortex formed at the sealing seat,GATE VALVES and constantly Clean the sealing surface to prevent adhesion of impurities in a sealed surface. 2: sewage valve closure process: 1. Clockwise rotating drain valve, valve stem drive down, this time the sewage has ended, the system pressure is lower, put onBALL VALVES the throttle valve hole size decreases, the guidance set close to the seat, and change the flow direction, medium after a certain speed by the throttle valve and the valve to do through the sealing surface, the gradual strengthening of the sealing surface of the cleaning efforts. 2. To turn the hand wheel, valve seat on the diversion into the valve seat hole, forming narrow throttle, because GLOBE VALVEthe sewage near the end, the medium has less impurity, guidance sets and the narrow gap between the valve seat to prevent the residual impurities into the sealing surface of the small, medium fast flow through the narrow, thoroughly clean the sealing surface to ensure sealing contact with zero leakage vice. 3. To turn the hand wheel, valve core and sealing contact with seat. Achieve seal.

原文来源：http://www.1xuansaifa.com/

2010-08-30 06:12