Seawater Service Dual Disc Check Valve

Valve Type Double Plate Wafer Check Valve (Dual Plate Check Valve)
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

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설명

TECHNICAL DATA SHEET

Double Plate Wafer Check Valve

General Information

Item	사양
밸브 유형	Double Plate Wafer Check Valve (Dual Plate Check Valve)
공칭 크기	DN300 (12 inch)
압력 등급	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)

Bill of Materials (Materials of Construction)

Part Name	재료	Material Standard (ASTM/DIN)
몸	연성 주철	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
봄	Stainless Steel	AISI 301 or AISI 316

Technical Specifications & Performance

Item	사양
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 –>)

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.

크기	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.

Product Features

Compact & Lightweight: The wafer body design significantly reduces weight and installation space compared to traditional swing check valves.
Low Pressure Drop: Streamlined disc design minimizes flow resistance.
Corrosion Resistance: 그만큼 Aluminum Bronze disc offers superior resistance to corrosion from seawater, chlorides, and various acidic media, making it ideal for harsh environments.
Tight Shut-Off: The combination of a metal disc and an EPDM resilient seat provides bubble-tight sealing.
Non-Slam Performance: Stainless steel springs ensure quick closing of the plates before flow reversal, effectively preventing water hammer.

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.

보증:

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