Product Name: YQ98008-LS20008-type emergency shutdown valve vacuum 
 Category: 9800 filter control valve piston 
 Specifications: YQ98008-16Q, 25Q 
 Product Diameter: 40-300mm 
 Product pressure: 1.6-2.5MPa 
 Views: 212 
 Input time: 2008-12-29 
 Page Keywords: YQ98008 vacuum relief valve 
 I. Overview: 
 In modern industrial and civil buildings, all kinds of new water supply system and fire protection systems continue to emerge, and thus the valve is more and more high performance requirements, more and more. This valve is designed for the new modern buildings valves doors, both with adjustable vacuum feature, and who can set a certain pressure points in the upstream, when the pressure exceeds the set pressure point of the emergency shutdown valve, to meet the design requirements. 

 The valve for domestic and fire systems share the water supply system, fire system is turned on when the pressure increases, the valve is closed, cutting off water, ensure that the fire water. 

 Second, characteristics: 
 1. The operational flexibility to adjust the valve, (the pressure does not exceed the set value) adjustment range, and reliable. 
 2. Decompression excellent results, regardless of how the changes in upstream pressure and flow, and set fixed downstream pressure equilibrium constant. 
 3. Can reduce dynamic pressure, static pressure can be reduced further. 
 Wide-body-shaped valve chamber, small flow resistance, strong anti-cavitation, no noise. 
 5. Emergency shutdown valve adjustment guide flexible, convenient and reliable. 
 6. The valve can also be single for the emergency shutdown valve. 
 7. Comes with filter and shockproof pressure gauge, the installation size reduced by about 40% less space, reduce investment costs. 
 8. Internal and external surfaces are sprayed green coating, anti-corrosion and to ensure product safety. 

 If used in sea water indicate when ordering. 


 Main technical parameters and 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 
 Temperature 0 ~ 100 ℃ for 
 Ambient temperature -30 ~ 350 ℃ 
 For medium water