Product Name: YQ98001 adjustable valve piston type filter 
 Category: 9800 filter control valve piston 
 Specifications: YQ98001 type 
 Product Diameter: DN40-400mm 
 Product pressure: 1.0-2.5MPa 
 Views: 257 
 Input time: 2008-10-25 
 Page Keywords: YQ98001 adjustable valve piston type filter 
 I. Overview 
 YQ98001 filter piston valve, is a use of the media to regulate and control its own energy intelligent line pressure valve. When the valve from the inlet water, the flow through the needle into the main valve control room, the role of the outlet pressure through the catheter to guide valve. When the pilot valve outlet pressure higher than the spring setting, the pilot valve closed. Control room to stop the drainage, when the main valve control room pressure rise and close the main valve outlet pressure will not rise. When the valve outlet pressure to a pilot valve spring set pressure, pilot valve opens, the control room to the downstream drainage. As guided needle valve system is greater than the amount of water displacement, the main valve pressure drop in the control room. Open the main valve inlet pressure. In the steady state, the control room water, drainage same, the main valve opening constant outlet pressure stability. Outlet pressure due to inlet pressure changes do not change, nor because of changes in the main valve outlet flow change, safe and reliable outlet pressure will remain at that setting. The decompression valve and accurate, stable, safe, reliable, easy installation and adjustment, long service life. Can be used for living water, fire systems and industrial water supply system. The main valve part material as follows: 

 Part Name Material 
 Body, bonnet cast iron, cast steel, stainless steel 
 Bronze seat, stainless steel 
 Valve carbon steel, stainless steel + nitrile rubber 
 Qinggang aluminum stem, chrome stainless steel 
 Chromium stainless steel + nitrile rubber piston 
 Stainless steel filter 
 Stainless steel spring