Product Name: YQ980012-LS200012 adjustable piston-type vacuum filter flow control valve 
 Category: 9800 filter control valve piston 
 Specifications: YQ980012 - 16Q, 25Q 
 Product Diameter: 40-400mm 
 Product pressure: 1.6-2.5MPa 
 Views: 249 
 Input time: 2008-12-29 
 Page Keywords: YQ980012 filter vacuum piston adjustable flow control valve 
 One. Overview: 
 YQ980012 adjustable piston-type vacuum filter / flow control valve is a stable flow control valve while the pressure is not greater than the value of the goal set volume control valve, this valve before the water supply system is not stable flow and pressure changes impact. However, when the valve before the flow is less than the set value, the main valve fully open, will not increase traffic. 
 Passed by the Pitot pressure signal to limit the pilot valve, pilot valve and limit the implementation of two-way control valve, pilot valve regulating flow through the stack limit bolt adjustment of the valve reaches the set value after the flow through the relief valve guide stack bolt adjust the regulation to control the main valve upstream pressure; Piston cavity orifice and downstream connected, the valve can be closed red ribbon. main valve is a pressure difference across the valve Kai. closed the drive energy. 
 Mainly used to. Drainage. Fire. Air conditioning and various industrial and mining enterprises such as water supply networks to filter but also stability in the pressure and flow valve for control of the premises and working conditions. 

 Features: 
 1. A valve after the valve can achieve control of both pressure and flow, and the media can filter. 
 2. Pitot very sensitive to the pilot valve limiting pressure signal is passed without also cutting the orifice plate, no pressure loss, energy saving! 
 3. Just a pile of bolts on the vacuum by adjusting the pilot valve and pilot valve to adjust the current limit can be achieved on the downstream pressure and flow control settings, easy and accurate. 
 Wide-body-shaped valve chamber, small flow resistance. Anti-cavitation and strong, no noise. 
 5. Pressure on the media's own self-control, no external source for the driver. 
 6. The main valve seat between the flange and the import to set the filter, reduce investment costs and installation costs. 
 7. Internal and external surfaces are sprayed green coating, anti-corrosion and to ensure product safety. 



 If used in sea water indicate when ordering. 


 1. Pitot 2. Ball 3. Filter 4. Main valve 5. Needle 6. Opening position indicator 7. Limiting pilot valve 8. Relief pilot valve 9. Ball 



 III. The main technical parameters and the main part materials: 
 Nominal pressure PN (MPa) 1.6 2.5 
 Nominal diameter DN (mm) 40 50 65 60 100 150 200 300 
 Strength test pressure (MPa) 2.40 3.75 
 Sealing test pressure (MPa) 1.76 2.75 
 Flow adjustment range 05 ~ 5m / S 
 Temperature 0 ~ 10 for