Lug Double Disc Check Valve

Lug Double Disc Check Valve
Product Details

Lug Double Disc Check Valve

Product Description

Size Range

1.5"-36" (   DN40-DN900)

Pressure  Rating For ASME

  1500LB,2500LB,Suit For ASME/MSS/API Flange

Pressure  Rating For ISO

PN10,PN16,PN25,PN40,Suit For ISO Flange

Pressure  Rating For JIS

5K,10K,20K,Suit For JIS Flange

Body Material




Design Standard

API 594 and Manafacture's

End Facing



Main Parameter Specification

BW end DimensionASME B16.25

Face to Face and End to EndASME B16.10

Pressure-temperature ratingsASME B16.34

Wall Thickness DimensionAPI 600,BS 1868

Inspection and TestAPI598,API600 or API 6D

Design and ManufactureCast Steel Check Valve to BS 1868,ASME B16.34,API 6D

End Flange DimensionASME B16.5(for NPS≤24,ASME B 16.47 series B,API 605,ASME B16.47 A Series,MSS SP-44(for NPS24)

Structural Feature

Bolted Bonnet; Swing and lift disc; Metallic seating surfaces.

Body and Bonnet Connection
The body and bonnet of Class150~Class900 check valves are usually with studs and nuts. And the body and bonnet of Class1500~Class2500 check valves are usually of pressurized seal design.

Body-To-Bonnet Joint
Stainless steel + flesible graphite wounded gasket is used for Class 150 and Class 300 check valve; Stainless steel + flexible graphite wounded gasket is used for Class 600 check valve, and joint gasket is also optional for Class 600 check valve; Ring joint gasket is used for Class900 check valve; Pressurized seal design is used for Class 1500~Class 2500 check valves.
For carbon steel check valve, the seat is usually forged steel. The sealing surface of the seat is spray welded with hard alloy specified by the customer. Renewable threaded seat is used for NPS<10 check valves, and welded on seat can be also optional if being requested by the customer. Welded on seat is used for NPS>12 crbon steel gate valves. Forstainless steel check valve, integral seat is usually adopted, or to weld hard alloy directly integrally. Threaded or welded on seat is also optional for stainless steel check valve if being requested by the customer.

Equipped with a professional factory, Naibang Valve is a professional manufacturer and supplier of Lug Double Disc Check Valve in China. If you want to buy quality product of various beautiful bags, you can get it at a cheap price from us.