1), aetv One-way valve: generally suitable for cleaning media, should not be used for containing solid particles and a larger viscosity medium. 2) For aetv One-way valve below DN50mm, butterfly check valves, vertical lift check valves and diaphragm check valves are recommended. For DN greater than 200mm and less than 1200mm Low-pressure non-return valve should be selected without wear ball check valve; DN greater than 50mm, less than 2000mm low-pressure check valve, should choose butterfly check valve and diaphragm check valve. 3) The diaphragm check valve is suitable for easy to produce water hammer on the pipeline, the diaphragm can be very good to eliminate the water hammer caused by the media counter-current, but the temperature and pressure limits, generally used in low-pressure room temperature pipe. 4) For the requirements of water hammer stroke when the impact is relatively small or no water hit the pipe, should use the slow closing Swing Check Valve and slow closing butterfly check valve.
Lighting Switch,Light Switch,Cim Series Light Switch
Rocker Switch Co,.Ltd , http://www.onbswitch.net