Self pressure valve - Self pressure valve

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Compared with other valve products, the self pressure valve has its feature that it is used in high temperature and high pressure circumstance and some parts are of welding type. Its performance and technical features and special working conditions endow the product with characteristics that can't be replaced by other products.
The self pressure valve of Y&B Company adopts mold forged, casting or precise CNC machining. It can provide absolutely reliable pressure with sealed bonnet. And it is guaranteed that the seat leakage is lower than the standard leakage. It passed the USA VOC middle shaft leakage test. If it is cast, the important parts of shell and butt-welding ends are subjected to radiation test according to specifications in ASME B16.34.
For the self pressure valve of Y&B Company, the body materials include carbon steel and Cr-Mo-V Steel. Overlay welding by cobalt-base alloy is performed on the sealing surface. The stem surface adopts anticorrosive nitriding

Describes the design and product range:
◇ Design basis: ASME B16.34, API600, DLT 531-1994, JBT3595-2002
◇ Socket welding ends: ASME B16.11, DIN3202
◇ 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"~24", DN15~DN600
◇ Materials of main parts: WCB, WC6, WC9, C5, C12, Alloy20

Design features:
◇ Bolted bonnet (below PN100)
◇ Pressure self-sealing type bonnet (above PN100)
◇ Butt-welding ends
◇ Socket welding ends (below 2")
◇ Design of outside screw and yoke for gate valves and globe valves
◇ Swing type valve disc or tilting disc type valve disc for check valves
◇ Overlay welding by cobalt-base alloy is performed on the sealing surface
◇ The stem surface adopts anticorrosive nitriding protection or chemical nickel plating protection
◇ Butt-welding ends 100% RT
◇ Important parts of shell 100% RT