DI084 Ductile Iron Dual Plate Check Valve PN-25 (Wafer Type)

di084
  • Item Code: DI0084
  • Pressure Rating: PN-25
  • Testing Standard: API 598
  • Size Range: 50mm to 300mm
  • Product Standard: API 594

Suitable For

di084

Material Specification

P. NO. NAME OF PART MATERIAL SPECIFICATION
1 BODY DUCTILE IRON ASTM A395
2 DISC HOLDING PLATE CAST CARBON STEEL ASTM A216 Gr. WCB
3 BUSH STAINLESS STEEL ASTM A276 TYPE 304
4 DISC STAINLESS STEEL ASTM A351 Gr. CF8
5 SPRING STAINLESS STEEL TYPE 316
6 L-KEY BOLT STAINLESS STEEL TYPE 316
7 STOPPER PIN STAINLESS STEEL ASTM A276 TYPE 410
8 DISC HOLDER PIN STAINLESS STEEL ASTM A276 TYPE 410
9 EYE BOLT CARBON STEEL IS 2062
di084

Dimensional Data

di084
 
SIZE (mm) 50 65 80 100 125 150 200 250 300
L±2 60 67 73 73 83 98 127 146 181±3
∅C 50 65 70 99 125 150 200 250 300
∅D 101 119 130 167 190 214 273 334 403.5
∅dk 92 104.8 -- 157.4 185.7 -- 269.7 324 381

Principle Features

INTRODUCTION

Leader Ductile Dual Plate Check Valves are automatic, quick-acting valve designed to prevent the reversal of flow in a piping system. The two valve discs, eccentrically embedded, have springs which force the valve to close in case no pressure is available. The pressure of the fluid passing through the system opens the valve discs, while any reversal of flow will close the valve discs. Closure is accomplished by the spring action and by back pressure.

  • Design Standard: API 594.
  • Retainer-less Construction ensures that they do not drill entirely into the valve body to allow the hinge pin and the stop pin to be fitted with a dual-plate check valve. The feature ensures high integrity & tamper-proof design, ensures no leakage from the body.
  • Body & Disc castings made of superior Ductile Iron ASTM A395 grade to ensure additional strength.
  • Wafer type design, to take lesser space than the Reflux / Swing Check Valve.
  • Being light in weight has more rugged construction than the standard Swing Type Check Valve, which needs expensive foundation and special supports.
  • Less wear and tear of seat surface due to resilient integrally moulded body seating face.
  • Stopper pin prevents the discs from coming into contact with each other and thus prevents disc damage. The stopper pin also prevents spring failure by ensuring that the discs don’t travel beyond the full-open position.
  • Low cracking pressure design (operable at low pressures).
  • Independent spring design feature also available which gives less scrubbing of disc & independents movement of discs.
  • Inherently non-slamming, no external devices/attachment required.
  • Water hammering effect is minimized in this design since the closing of valve does not depend upon any back pressure or flow.
  • Either vertically (only upwards) or horizontally installed.
  • Lifting eyebolt option is provided.

END CONNECTION

  • Wafer type Suitable for clamping between flanges as per BSEN 1092 PN-25.
  • Suitability for insertion between other flange standards also available upon request.

UTILISATION & SERVICE

  • Best suited for water, HVAC, fire-fighting, compressed air applications.

WORKING PRESSURE & TEMPERATURE LIMITS

  • Maximum Working Pressure: 25 Bar.
  • Maximum Working Temperature: 120°C.
  • See Pressure / Temperature Diagram.

TEST PRESSURE (Hydrostatic)

Rating PN-25
Body (Hyd.) 37.5 Bar
Seat (Hyd.) 27.5 Bar

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