Description
TECHNICAL DATA SHEET
Double Plate Wafer Check Valve
- General Information
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Item
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Specification
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Valve Type
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Double Plate Wafer Check Valve (Dual Plate Check Valve)
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Nominal Size
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DN300 (12 inch)
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Pressure Rating
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150 LB (Class 150)
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End Connection
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Wafer Type (Fits between ASME B16.5 Flanges)
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Design Structure
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Dual Plate / Non-Slam
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Medium
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Water, Oil, Gas, and Mild corrosive media
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Operating Temp.
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-20°C to +120°C (-4°F to 248°F)
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- Bill of Materials (Materials of Construction)
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Part Name
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Material
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Material Standard (ASTM/DIN)
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Body
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Ductile Iron
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ASTM A536 (60-40-18) / DIN GGG-50
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Disc (Plate) (x2)
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Aluminum Bronze
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ASTM B148 (C95800 / C95400) / BS 1400 AB2
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Shaft / Pin
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Stainless Steel
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AISI 304 or AISI 316
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Seat (Seal)
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EPDM (Ethylene Propylene Diene Monomer)
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Excellent resistance to hot water, steam, and dilute acids
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Spring
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Stainless Steel
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AISI 301 or AISI 316
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- Technical Specifications & Performance
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Item
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Specification
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Design Standard
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API 594, API 6D, EN 593, BS 5153
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Face to Face Dimension
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ASME B16.10 / API 594 (Short/Compact pattern)
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Flange Drilling Standard
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ASME B16.5 (Class 150)
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Pressure Test Standard
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API 598
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Shell Hydrostatic Test
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3.0 MPa (435 psi)
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Seal Hydrostatic Test
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2.2 MPa (319 psi)
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Low Pressure Air Test
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0.6 MPa (87 psi)
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Installation Position
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Horizontal or Vertical (Flow direction upward)
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Flow Direction
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Arrow cast on body (Flow –>)
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- 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.
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Size
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Face-to-Face Length (L)
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Body Outside Diameter (D)
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Flange Bolt Circle Dia. (D1)
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No. of Bolt Holes & Dia.
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DN300 (12″)
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73 mm – 83 mm (Typical: 79 mm)
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Approx. 340 mm
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451 mm (ASME B16.5 150LB)
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12 – 25 mm (Φ25)
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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: The 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.
GUATANTEE:
SAVVY VALVES is committed to delivering exceptional product quality and worry-free after-sales service. Our valves are guaranteed to provide a minimum service life of 12 months, during which we will supply all necessary spare parts and detailed maintenance instructions free of charge. Within the warranty period, if any non-human-induced damage occurs, we will replace components at no cost and provide professional technical support. After the warranty expires, customers only need to pay for the cost of spare parts, while still benefiting from discounted maintenance services. Our goal is to help clients reduce operational costs and enhance production efficiency through reliable quality and comprehensive after-sales support. Whether for technical inquiries or maintenance needs, our expert team will respond promptly to ensure your valve system maintains optimal performance at all times.