Seawater Service Dual Plate Check Valve
Seawater Service Dual Plate Check Valve - Image 2
Seawater Service Dual Plate Check Valve - Image 3
Seawater Service Dual Plate Check Valve - Image 4

Seawater Service Dual Plate Check Valve

Categories: ,

Description

TECHNICAL DATA SHEET

Double Plate Wafer Check Valve

Project: _______________________
Tag No.: _______________________
Qty: _______________________

1. General Information

Item Specification
Valve Type Double Plate Wafer Check Valve (Dual Plate Check Valve)
Model H76X-150LB (Example)
Nominal Size DN300 (12 inch)
Pressure Rating 150 LB (Class 150)
End Connection Wafer Type (Fits between ASME B16.5 Flanges)
Design Structure Dual Plate / Non-Slam
Medium Water, Oil, Gas, and Mild corrosive media
Operating Temp. -20°C to +120°C (-4°F to 248°F)

2. Bill of Materials (Materials of Construction)

Part Name Material Material Standard (ASTM/DIN)
Body Ductile Iron ASTM A536 (60-40-18) / DIN GGG-50
Disc (Plate) (x2) Aluminum Bronze ASTM B148 (C95800 / C95400) / BS 1400 AB2
Shaft / Pin Stainless Steel AISI 304 or AISI 316
Seat (Seal) EPDM (Ethylene Propylene Diene Monomer) Excellent resistance to hot water, steam, and dilute acids
Spring Stainless Steel AISI 301 or AISI 316

3. Technical Specifications & Performance

Item Specification
Design Standard API 594, API 6D, EN 593, BS 5153
Face to Face Dimension ASME B16.10 / API 594 (Short/Compact pattern)
Flange Drilling Standard ASME B16.5 (Class 150)
Pressure Test Standard API 598
Shell Hydrostatic Test 3.0 MPa (435 psi)
Seal Hydrostatic Test 2.2 MPa (319 psi)
Low Pressure Air Test 0.6 MPa (87 psi)
Installation Position Horizontal or Vertical (Flow direction upward)
Flow Direction Arrow cast on body (Flow –>)

4. Dimensional Data (Approximate)

Note: Wafer check valves have a short face-to-face length. The exact “L” dimension can vary slightly by manufacturer. Please verify the final dimension with the approved drawing.

Size Face-to-Face Length (L) Body Outside Diameter (D) Flange Bolt Circle Dia. (D1) No. of Bolt Holes & Dia.
DN300 (12″) 73 mm – 83 mm (Typical: 79 mm) Approx. 340 mm 451 mm (ASME B16.5 150LB) 12 – 25 mm (Φ25)

Important Installation Note:
Ensure the pipeline flanges spread apart to insert this valve. The bolts are long-pass bolts that go through the entire valve body.

5. Product Features

  1. Compact & Lightweight: The wafer body design significantly reduces weight and installation space compared to traditional swing check valves.

  2. Low Pressure Drop: Streamlined disc design minimizes flow resistance.

  3. Corrosion Resistance: The Aluminum Bronze disc offers superior resistance to corrosion from seawater, chlorides, and various acidic media, making it ideal for harsh environments.

  4. Tight Shut-Off: The combination of a metal disc and an EPDM resilient seat provides bubble-tight sealing.

  5. Non-Slam Performance: Stainless steel springs ensure quick closing of the plates before flow reversal, effectively preventing water hammer.

6. Inspection & Warranty

  • Valves are pressure tested in accordance with API 598.

  • Marking per MSS SP-25.

  • Free from porosity and structural defects.

If you need to adjust this sheet:

  • Change the seat material (e.g., to Viton® or PTFE).

  • Update specific face-to-face dimensions if provided by the manufacturer.

  • Add torque values or actuator data.

Related products