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+91 86058 24555
info@normexvalves.com
 
 
 

Silent Check Valves, Silent Check Valve, Manufacturer, Pune, India

 
CHECK VALVES

 
Normex Valves Pvt. Ltd. brings this latest technology for the first time in India. Silent Check Valves are a short length double flanged valves with all the internals designed Hydrodynamically. This valves, when open, the annular area between the body & plunger available for flow, is equal to the nominal bore area. Therefore, unlike other spring loaded valves & conventional flapcheck valves, these valves offer lower head losses & maintains laminar flow. As the valve closes, due to return spring force, valve is “Quick Closing”. The valve gets closed before the start of back flow / return velocity. Hence, water hammer is eliminated in most of the cases.

Features:

1.Working principal Hydrodynamic guided closing.
2.The closing mechanism is guided & backed with return spring for quick closing,
   Opening and perfect sealing.
3.Due to Aero/hydro dynamic effect water hammer is eliminated.
4.Very low pressure loss
5.Most suitable for clear liquids & air.
6.Silent operation.
 
 
DESCRIPTION STANDARD  MATERIAL ON REQUEST
BODY/GUIDE CAST IRON (GG25)  
PLUNGER S.G. IRON  
SPRING STAINLESS STEEL  
SEAT RING L T BRONZE ST.STEEL
PAINT ENAMEL PAINT  
END CONNECTION FLANGED  
 
 
SIZE RANGE 40mm TO 400mm
PRESSURE TESTING BODY: 1.5 X PN
  SEAT : 1.1 X PN
   
PRESSURE RATING -KPa  
40mm TO 125mm PN 1.6
150mm TO 300mm PN 1.0
350mm & 400mm PN 0.6
INSTALLATION HORIZONTAL AS WELL AS VERTICAL
TEMPERATURE SUITABLE UPTO 800C
 
Dimensions (A = size in mm)
A 40 50 65 80 100 150 200 250 300 350 400
D 150 165 185 200 220 285 340 406 457 527 578
W 85 105 128 156 194 264 346 430 500 600 686
H 85 100 120 140 170 230 290 355 398 475 560
 
 
TECHNICAL COMPARISON
 
Check Valves - Hydrodynamic Guided Closing (HGC) Conventionally used Flap type
Normex HGC model H-01 Conventional Flap type
Innovative design, focused to eliminate all constraints of conventional one and offer optimum performance Conventional design carries lot of constraints.
Internals designed in such a way that laminar flow is not disturbed to a large extent. Turbulance is generated in fluid flow due to design limitations.
Very low pressure drop acros the valve which saves energy, reduces pump cycle time duration Comparatively high pressure losses, requires more energy increases pump cycle time duration.
Valve closing mechanism is guided by precise guide & plunger mechanism which ensures perfect sealing. Hing-pin-disc closing mechanism has lot of play which results in leakages.
Closing mechanism supported by spring force eliminates hammer to a large extent. Closing mechanism is by back force of fluid hence maximum effect of hammer which causes many a times damage of pump or bursting of pipes.
Compact space saving design. Reduces face-to-face length. Light weight hence easy handling. Standard full length valve higher in weight.
Vertical or horizontal installation is easily possible. Installation recommended for horizontal position.
Symmetrically shaped design hence no top or bottom side selection for installation. Cover side should be always on top for installation.
Material used is of grade FG 260 having higher tensile strength (26 N/mm2) Material recommended is FG 200 having lower tensile strength (20 N/mm2)
 
 
 
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