Dual Plate Wafer Spring Loaded Disc Check Valve

Product Details:

Place of Origin:	中国
Brand Name:	GOLD TOP
Certification:	API 6D

Payment & Shipping Terms:

Minimum Order Quantity:	1pcs
Price:	Price to be negotiated in person
Packaging Details:	Plywood Case
Delivery Time:	30days
Supply Ability:	100+pcs+30days

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Detailed Product Description

Size:	2"～48"	End Connection:	RF / RTJ / BW
Inspection & Testing:	API598	Pressure Range::	150 #～2500#
Type:	Dual Wafer	Design:	API6D
High Light:	dual plate check valve , wafer lug type check valve

Flanged Dual- Plate Wafer Check Valve

Product Details:

Dual-plate check valves are bonnetless and mounted between pipe flanges (wafer style). In this case, the valve includes two spring loaded half-moon shaped discs that rotate about their shaft. The actual designs of these valves vary between design models and manufacturers. Most have multiple flat seats. The dual-plate check valve disc has short rotational disc travel and responds quickly to flow stoppage or reversal, thus the potential for moderate water hammer does exist. It is somewhat better than the swing check valve at minimizing potential water hammer, but with a much higher pressure drop.

Depending on the design, maintenance effort ranges from relatively simple to difficult. All dual-plate check valves must be removed from the line to perform maintenance due to the bonnetless design. The dual-plate check valve also results in a higher pressure drop when compared to a tilting disc check valve of the same size.

Although most of the wafer check valves are installed between two flanges, and no need to be flanged type, some other applications may need flanged type wafer check valve for better alignment of valves. The flanged valve body could be cast or forged upon customer’s requirement.

Features of Flanged Dual-plate Wafer Check Valves:

One Piece Body Design
Short Face-to-face
Inline Double Plate
Spring-loaded Disc for Quick Closure
Flanged Wafer End

Applicable Standards of Flanged Dual-plate Wafer Check Valves:

a) Design&Manufacture: API 6D, API 594
b) Face to Face: API 6D, ASME B16.10, EN 558
c) Connection End: ASME B16.5, EN 1092, JIS B2220
d) Test and Inspection: API 6D, EN 12266, API 598

Sizes: 2″ – 48″ or DN50 – DN1200
Pressure Rating: Class150 – Class1500 or PN16 – PN250
Material of Valve Body: WCB, LCB, WC6, WC9, C12, C5, CF8, CF3, CF3M, CF8M, etc.

Standard Material List

No.	Part Name	Material	No.	Part Name	Material
1	Body	ASTM A216-WCB	5	Washer	ASTM A182-F316
2	Plug	Steel	6	Hook Screw	Steel
3	Stop Pin	ASTM A182-F316	7	Spring	ASTM A276-316
4	Hinge Pin	ASTM A182-F316	8	Plate Disc	ASTM A351-CF8M

Design and Manufacturing Standards:
Basic Design:	API 6D / API 594
Face to Face Dimension:	API 6D / ANSI B16.10
Pipe Flange standard:	ANSI B16.5
Inspection & Testing to:	API 6D / API 598