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
