- Item Code: CI0085
- Disc: Ductile Iron
- Pressure Rating: PN-16
- Testing Standard: API 598
- Size Range: 40mm to 900mm
- Product Standard: API 594
Suitable For
Material Specification
| P. NO. | NAME OF PART | MATERIAL | SPECIFICATION |
|---|---|---|---|
| 1 | BODY | C.I | BSEN 1561 GJL200 |
| 2 | DISC | D.I. | ASTM A395 |
| 3 | DISC HOLDING PLATE | C.C.S | ASTM A216 Gr. WCB |
| 4 | BUSH | S.S | ASTM A276 TYPE 304 |
| 5 | SPRING | S.S.316 | - |
| 6 | L-KEY SCREW/BOLT | S.S.316 | - |
| 7 | STOPPER PIN | S.S | ASTM A276 TYPE 410 |
| 8 | DISC HOLDING PIN | S.S | ASTM A276 TYPE 410 |
| 9 | LIFTING HOOK | C.S. | IS 2062 |
Dimensional Data
| SIZE (mm) | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 600 | 650 | 700 | 750 | 800 | 900 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| L | 60 | 54±2 | 60±2 | 67±2 | 67±2 | 83±2 | 95±2 | 127±2 | 140±2 | 181±3 | 184±3 | 191±3 | 203±3 | 213±3 | 222±3 | 305±3 | 305±3 | 305±3 | 305±3 | 368±3 |
| ∅C | 50 | 50 | 65 | 70 | 100 | 125 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 604 | 650 | 700 | 750 | 777 | 900 |
| ∅D | 80 | 101 | 119 | 130 | 171 | 192 | 216 | 273 | 334 | 403.5 | 446 | 510 | 545 | 602 | 713 | 750 | 800 | 870 | 875 | 975 |
Principle Features
INTRODUCTION
Leader 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.
- 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 support.
- Less wear and tear of seat surface due to resilient integrally ‘molded 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.
- Flanged ends as per IS:1538 PN-1.6 (FF).
- Lifting eyebolt option is provided.
END CONNECTION
- Wafer type Suitable for clamping between flanges as per ANSI B16.1 Class-125 / ASME B16.5 Class-150 / 1S 6392.
- Suitability for insertion between other flange standards also available upon request.
UTILISATION & SERVICE
- Best suited for water, HVAG, fire-fighting, compressed air application.
WORKING PRESSURE
- Maximum Working Pressure: 16 Bar.
- See Pressure / Temperature Diagram.
TEMPERATURE LIMITS
- Maximum Working Temperature: 120°C.
- See Pressure / Temperature Diagram.
TEST PRESSURE (Hydrostatic)
| Rating | PN-16 |
|---|---|
| Body (Hyd.) | 24 Bar |
| Seat (Hyd.) | 17.6 Bar |