Dual Plate Wafer Check Valve Technical Data Sheet
- General Specifications
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Item
|
Specification
|
|
Valve Type
|
Wafer Dual Plate Check Valve
|
|
Pressure Rating
|
PN16 (Equivalent to Class 150)
|
|
Nominal Size
|
DN50 – DN600 (NPS 2″ – 24″) Specify as required
|
|
End Connection
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Wafer Type / Lug Type Select as required
|
|
Face to Face Dimension
|
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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Body Material
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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
|
ASTM A276 Type 316 / 316L Stainless Steel
|
|
Seat / Sealing Surface
|
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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Material
|
Material Grade / Specification
|
ASTM Standard
|
|
Body
|
Austenitic Stainless Steel
|
CF3M
|
ASTM A351
|
|
Discs (Dual Plate)
|
Austenitic Stainless Steel
|
CF3M
|
ASTM A351
|
|
Shaft / Hinge Pin
|
Precipitation Hardening / SS
|
17-4PH / 316 SS
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ASTM A564 / A276
|
|
Seat Ring (Integral)
|
Hardfaced Alloy
|
Stellite (or equivalent)
|
–
|
|
Spring (Torsion)
|
High-Temperature Alloy
|
Inconel X-750 / 17-7PH
|
ASTM A638 / A693
|
|
Locating Dowel Pin
|
Stainless Steel
|
Type 316
|
ASTM F593
|
|
Gasket / O-Ring (Opt.)
|
Flexible Graphite / Viton
|
–
|
–
|
- Technical Parameters & Performance
|
Item
|
Unit
|
Value / Description
|
|
Pressure Testing
|
|
API 598 / ASME B16.34
|
|
– Shell Hydrostatic Test
|
psi (MPa)
|
1.5 x PN (Appx. 348 psi / 2.4 MPa)
|
|
– High Pressure Seat Test
|
psi (MPa)
|
1.1 x PN (Appx. 255 psi / 1.76 MPa)
|
|
– Low Pressure Pneumatic Test
|
psi (MPa)
|
80 psi (0.6 MPa)
|
|
Operational Limits
|
|
|
|
– 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
|
|
Backpressure prevents reverse flow. (Seat Leakage: Per API 598 / ISO 5208 Rate D for Metal Seats)
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|
Disc Action
|
|
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.
|
Size DN (NPS)
|
Valve Length L (mm)
|
Flange Dia. D (mm)
|
Bolt Circle K (mm)
|
Recommended Bolts
|
Approx. Weight (kg)
|
|
50 (2″)
|
43
|
165
|
125
|
4 x M16
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~2.5
|
|
80 (3″)
|
64
|
200
|
160
|
8 x M16
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~5.0
|
|
100 (4″)
|
64
|
220
|
180
|
8 x M16
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~7.5
|
|
150 (6″)
|
76
|
285
|
240
|
8 x M20
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~14.0
|
|
200 (8″)
|
95
|
340
|
295
|
12 x M20
|
~25.0
|
|
250 (10″)
|
114
|
405
|
355
|
12 x M24
|
~38.0
|
|
300 (12″)
|
114
|
460
|
410
|
12 x M24
|
~55.0
|
|
350 (14″)
|
127
|
520
|
470
|
16 x M24
|
~75.0
|
|
400 (16″)
|
140
|
580
|
525
|
16 x M27
|
~95.0
|
- Applicable Standards
- Design & Manufacture: API 594, ASME B16.34
- Face-to-Face: 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
- Remarks
- 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.
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.
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