Product Name: YQ980010-LS20010 piston-type filter relief valve to prevent water hammer 
 Category: 9800 filter control valve piston 
 Specifications: YQ980010-16Q, 25Q 
 Product Diameter: 40-300mm 
 Product pressure: 1.6-2.5MPa 
 Views: 248 
 Input time: 2008-12-29 
 Page Keywords: YQ980010 filter piston relief valve to prevent water hammer 
 I. Overview 
 The multi-valve consists of a Y-valve chamber width of the main valve with filter, a low pressure pilot valve links the links high-pressure pilot valve of a composition, when unexpected power outages, pump shutdown, the pump starts and other situations, generate a low volatility, low-pressure pilot valve opens when open to atmosphere, the piston chamber pressure drops, open the main valve outlet and return water pressure coming in, keep looking for open state, when the pipeline pressure to the pressure conditions, low pilot valve and main valve is slowly closed. 

 When the pipeline pressure exceeds the safety value, high-pressure pilot valve opens and the atmosphere immediately connected, open the main valve to open when the discharge blood pressure, when the pressure returned to normal, the pilot valve and main valve to gradually close. 

 The valve can be widely used in water companies pump into the air-conditioning, plumbing and various industrial and mining enterprises in the water supply pipe network, the same as the other relief valve near the pump can be installed in the T-connection pipe, in fact, any pressure in the pipe network , cited the valve to prevent excess pressure or water hammer damage to the pipe network, played on the role of the network security insurance. 

 Second, characteristics 

 Unexpected power outage can protect the pump in the system from water hammer, but also to ensure the safety over-pressure water supply pipe network. 
 Easy to operate, as long as each of the two pilot valve plug on the regulator to adjust the stack, you can achieve high and low pressure settings. 
 Set high and low pressure is stable and reliable, emissions sensitive. 
 Y-type wide-body valve chamber, small flow resistance, strong anti-cavitation, no noise. 
 Pressure controlled by the medium itself, no external source for the driver. 
 Comes with filter and shockproof pressure gauge, the installation size reduced by about 40% less space, reduce investment costs. 
 Environmental protection both inside and outside surfaces are sprayed coating, corrosion protection and to ensure product safety. 
 If used in sea water indicate when ordering! 


 Main technical parameters of the main part materials 
 1, Main technical parameters: nominal pressure PN (MPa) 1.6 2.5 
 Nominal diameter DN (mm) 40 50 65 80 100 150 200 250 300 
 Strength test pressure (MPa) 2.40 3.75 
 Sealing test pressure (MPa) 1.76 2.75 
 Low-pressure pilot valve set pressure ≥ 0.1MPa 
 High-pressure pilot valve set pressure ≤ 1.6MPa ≤ 2.5MPa 
 Temperature 0 ~ 100 ℃ for 
 Ambient temperature -30 ~ 350 ℃ 
 For medium water