DI CHECK VALVE DOUBLE DOOR WAFER (CVW25)
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DI CHECK VALVE DOUBLE DOOR WAFER (CVW25)

  • Permit flows in one direction and close automaticaly if flow reverse size.  
  • Low wieght and short laying length saves initial cost, requires less space, and is easier to install. 
  • Independent springs provide quick-closing, non-slam shut off for reduced water hammer potential. 
  • Lightweight, spring-loaded discs have low cracking pressure for energy efficient operation. 
  • 200 Micron Fusion Bonded Epoxy Powder Coated internal and external ensured barrier to corrosive chemicals, moisture and humid air. 
  • Featuring dual lightweight discs, responsive independent springs and a durable resilient seat for reliable flow activated operation with tight sealing and reduced water hammer potential. 
  • EPDM rubber seat to faciliate quiet/Silent operations and improve disc seating without any leakage.
Category :
Part No Part Name Material
1 BODY DUCTILE IRON : BS EN 1563 EN-JS 1050
2 PLATES/DISC  NICKEL PLATED DUCTILE IRON : BS EN 1563 EN-JS1050 
3 SEAT  RUBBER : EPDM
4 BODY/PLATE/SPRING BEARING NYLON/PTFE : BS 6564
5 HINGLE PIN  STAINLESS STEEL : BS EN 10088-3 GR.1 4301 
6 STOP PIN  STAINLESS STEEL : BS EN 10088-3 GR.1 4301 
7 TORISION SPRING  STAINLESS STEEL : BS EN 10088-3 GR.1 4308 
8 HINGE PIN RETAINERS  STAINLESS STEEL : BS EN 10088-3 GR.1 4301 
9 PACKING  RUBBER : EPDM 
10 EYE BOLT STEEL

PRESSURE / TEMPERATURE RATING

Pressure Rating 25 bar
Temperature -10 to 120 °C

TEST PRESSURES

Shell 37.5 bar
Seat 27.5 bar

SPECIFICATION

  • Double door wafer pattern with spring assisted closure. 
  • Elastomer seat vulcanized to the body casting to ensure extended seal life. 
  • Suitable for mounting in horizontal and vertical pipelines. 
  • Ideal for fltting between flanges to BS EN 1092-2. 
  • Face to Face: BS EN 558:2008 
  • Testing standard: BS EN 12266-2.

DIMENSIONS & WEIGHTS

Size A B C Weight (kg)
65 MM 81 109 54 2.80
80 MM 99 130 57 3.20
100 MM 116 160 64 4.60
125 MM 143 194 70 7.40
150 MM 170 214 76 8.50
200 MM 219 270 95 16.10
250 MM 273 328 108 25.50
300 MM 324 378 143 39.50
305 MM 360 447 184 72.50
400 MM 406 511 191 94.50
450 MM 457 546 203 120
500 MM 508 603 213 150
600 MM 610 714 222 210

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