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Cast Steel Check Valve

The check valve indicates a kind of valve in which the valve disc is automatically opened by the pressure produced by the flowing of the medium itself, and closed by the reverse pressure or the weight of the valve disc, so as to make the fluid flow toward one direction.

The check valves include different types such as swing type, lift type and tilting disc type. Designed in accordance with specifications in API6D, the full-open type check valves are applied in transportation lines for crude oil and natural gas.

 

Describes the design and product range:

Design basis: ASME B16.34, GB12236, API6D

Flanged ends: ASME B16.5, GB9113

Butt-welding ends: ASME B16.25

Face-to-face dimension: ASME B16.10, GB12221

Inspection and test: API598, API6D, JB/T9092

Pressure rating: Class150~2500, PN16~PN420

Product range: 2"~36", DN50~DN900

Materials of main parts: WCB, LCB, WC6, Wc9, C5,

CF8M, Alloy20

Trim materials: as per API600

 

 

Design features:

Swing type valve disc

Tilting disc type valve disc

Bolted bonnet

Pressure self-sealing type bonnet

Suitable for horizontal and vertical installation

Flanged ends

Butt-welding ends

Pressure self-sealing type bonnet

Overlay welding by hard alloy can be performed on the seat surface according to specifications in API600

Replaceable valve seat Integral seat and back seat are adopted in stainless steel valves

The built-in structure is adopted for connecting the pin and valve disc, so there is no external leakage point

 

 

Forged Steel Check Valve

The forged steel valve is generally used for the high pressure valve. These valves include forged steel gate valves, globe valves and check valves in accordance with American standard and national standard.

The valves of this kind produced by Y&B Company have multiple varieties and diversified specifications ranging from 1/2" to 3", which can meet customer's technical demands and delivery requirement.

We can provide trims and shells of various materials according to specifications in API602.

 

Describes the design and product range:

Design basis: API602, BS5352, ASME B16.34

Socket welding ends: ASME B16.11, DIN3202

Threaded ends: ASME B1.20.1

Butt-welding ends: ASME B16.25

Face-to-face dimension: ASME B16.10, GB12221

Inspection and test: API598, API6D, JB/T9092

Pressure rating: Class600~2500, PN100~PN420

Product range: 1/2"~3", DN15~DN80

Materials of main parts: A105, F11, F22, F5, F316

Trim materials: as per API600

 

 

Design features:

Bolted bonnet

Welded bonnet

Pressure self-sealing type bonnet

Screwed ends

Socket welding ends

Design of outside screw and yoke for gate valves and globe valves

Lift type valve disc (spring can be added) for check valves

Swing type valve disc is also available for check valves

Overlay welding by hard alloy can be performed on the seat surface according to specifications in API602

Body seat is adopted in stainless steel valves

Bellows seal can be made according to requirements