Dual Plate Wafer Check Valve Technical Data Sheet
- General Specifications
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Item
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Spesifikasi
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Jenis Injap
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Wafer Dual Plate Check Valve
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Penilaian Tekanan
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PN16 (Equivalent to Class 150)
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Saiz Nominal
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DN50 – DN600 (NPS 2″ – 24″) Specify as required
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End Connection
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Wafer Type / Lug Type Select as required
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Face to Face Dimension
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API 594 / EN 558 Series 20
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Sealing Type
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Metal-to-Metal Hard Seal
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Medium
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Water, Oil, Gas, and Corrosive Media (Compatible with CF3M)
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Operating Temperature
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-29°C to +425°C (-20°F to +800°F)
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Bahan Badan
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ASTM A351 Grade CF3M (Equivalent to 316L Stainless Steel)
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Disc (Plate) Material
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ASTM A351 Grade CF3M (Equivalent to 316L Stainless Steel)
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Shaft / Hinge Pin Material
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ASTM A276 Type 316 / 316L Stainless Steel
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Seat / Sealing Surface
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Hard Facing (Stellite / Cobalt-based Alloy) on Body
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- Bill of Materials (ASTM Standards)
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Part Name
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bahan
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Material Grade / Specification
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ASTM Standard
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Badan
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Austenitic Stainless Steel
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CF3M
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ASTM A351
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Discs (Dual Plate)
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Austenitic Stainless Steel
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CF3M
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ASTM A351
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Shaft / Hinge Pin
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Precipitation Hardening / SS
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17-4PH / 316 SS
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ASTM A564 / A276
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Seat Ring (Integral)
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Hardfaced Alloy
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Stellite (or equivalent)
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–
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Spring (Torsion)
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High-Temperature Alloy
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Inconel X-750 / 17-7PH
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ASTM A638 / A693
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Locating Dowel Pin
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Stainless Steel
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Type 316
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ASTM F593
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Gasket / O-Ring (Opt.)
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Flexible Graphite / Viton
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–
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–
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- Technical Parameters & Performance
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Item
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Unit
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Value / Description
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Pressure Testing
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API 598 / ASME B16.34
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– Shell Hydrostatic Test
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psi (MPa)
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1.5 x PN (Appx. 348 psi / 2.4 MPa)
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– High Pressure Seat Test
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psi (MPa)
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1.1 x PN (Appx. 255 psi / 1.76 MPa)
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– Low Pressure Pneumatic Test
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psi (MPa)
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80 psi (0.6 MPa)
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Operational Limits
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– Max. Flow Velocity
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ft/s (m/s)
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Water: ≤ 16 ft/s (5 m/s); Gas: ≤ 164 ft/s (50 m/s)
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– Closure Pressure
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Backpressure prevents reverse flow. (Seat Leakage: Per API 598 / ISO 5208 Rate D for Metal Seats)
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Disc Action
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Spring-assisted automatic closure. Recommended installation on horizontal lines with shaft vertical, or vertical lines with upward flow.
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- Dimensions & Connection Data (Wafer Type, Units: mm / inches)
Note: Dimensions are for reference. Please refer to the specific manufacturer’s drawing for exact fit.
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Size DN (NPS)
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Valve Length L (mm)
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Flange Dia. D (mm)
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Bolt Circle K (mm)
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Recommended Bolts
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Approx. Weight (kg)
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50 (2″)
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43
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165
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125
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4 x M16
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~2.5
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80 (3″)
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64
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200
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160
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8 x M16
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~5.0
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100 (4″)
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64
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220
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180
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8 x M16
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~7.5
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150 (6″)
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76
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285
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240
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8 x M20
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~14.0
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200 (8″)
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95
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340
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295
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12 x M20
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~25.0
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250 (10″)
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114
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405
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355
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12 x M24
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~38.0
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300 (12″)
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114
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460
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410
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12 x M24
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~55.0
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350 (14″)
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127
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520
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470
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16 x M24
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~75.0
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400 (16″)
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140
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580
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525
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16 x M27
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~95.0
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- Applicable Standards
- Design & Manufacture: API 594, ASME B16.34
- Bersemuka: API 594, ISO 5752 Series 20
- Flange Dimensions: ASME B16.5 (for Class 150), ASME B16.47
- Pressure Testing: API 598, ISO 5208
- Material (Body/Disc): ASTM A351 Grade CF3M
- Material (Other): ASTM A276, ASTM A564, etc.
- Marking: MSS SP-25
- Teguran
- Material Characteristics: ASTM A351 CF3M is the cast equivalent of UNS S31603 (316L) . It features ultra-low carbon content, providing excellent resistance to intergranular corrosion after welding and in chloride environments.
- Metal Seated Feature: This valve features a Metal-to-Metal Hard Seal, making it suitable for high-temperature applications. The allowable leakage rate typically conforms to ISO 5208 Rate D(or API 598) for metal seats (a minute leakage is permissible; zero leakage is generally not guaranteed for standard metal seats).
- Flow Direction: A permanent flow directional arrow is cast or marked on the valve body. Installation must align with the pipeline flow direction.
- Installation Guidance: Best installed in horizontal pipelines with the shaft in a vertical position. For vertical installations, flow must be in the upward direction to allow the discs to open properly.
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