CF3M Wafer Dual Plate Check Valve

Pressure Rating PN16 (Equivalent to Class 150)
Nominal Size DN50 – DN600 (NPS 2″ – 24″) Specify as required
End Connection Wafer Type / Lug Type Select as required
Face to Face Dimension API 594 / EN 558 Series 20
Sealing Type Metal-to-Metal Hard Seal

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Dual Plate Wafer Check Valve Technical Data Sheet

General Specifications

Item	仕様
バルブタイプ	Wafer Dual Plate Check Valve
圧力定格	PN16 (Equivalent to Class 150)
公称サイズ	DN50 – DN600 (NPS 2″ – 24″) Specify as required
End Connection	Wafer Type / Lug Type Select as required
Face to Face Dimension	API 594 / EN 558 Series 20
Sealing Type	Metal-to-Metal Hard Seal
Medium	Water, Oil, Gas, and Corrosive Media (Compatible with CF3M)
Operating Temperature	-29°C to +425°C (-20°F to +800°F)
ボディ素材	ASTM A351 Grade CF3M (Equivalent to 316L Stainless Steel)
Disc (Plate) Material	ASTM A351 Grade CF3M (Equivalent to 316L Stainless Steel)
Shaft / Hinge Pin Material	ASTM A276 Type 316 / 316L Stainless Steel
Seat / Sealing Surface	Hard Facing (Stellite / Cobalt-based Alloy) on Body

Bill of Materials (ASTM Standards)

Part Name	材料	Material Grade / Specification	ASTM Standard
体	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	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	ft/s (m/s)	Water: ≤ 16 ft/s (5 m/s); Gas: ≤ 164 ft/s (50 m/s)
– Closure Pressure		Backpressure prevents reverse flow. (Seat Leakage: Per API 598 / ISO 5208 Rate D for Metal Seats)
Disc Action		Spring-assisted automatic closure. Recommended installation on horizontal lines with shaft vertical, or vertical lines with upward flow.

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	~2.5
80 (3″)	64	200	160	8 x M16	~5.0
100 (4″)	64	220	180	8 x M16	~7.5
150 (6″)	76	285	240	8 x M20	~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
対面： 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.

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