HDH500A Triple Offset Metal Seated Butterfly Valve
Description
HDH500A disc seal rings are composed of alternating layers of corossion-resistant alloy and composite graphite. Each individual piece provides an independent seal, even if one-piece damages, the remaining alloy ring and graphite ring can still ensure the tight sealing of the valve, moreover the laminated design of the seal ring also effectively reduces the valve operating torque, the seat is directly welded STELLITE alloy on the valve body.
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Parameter
Design：API609、DIN3840、ANSI B16.34
Pressure Rating：Class 150~2500
Face to Face : API609、ISO5752、ANSI B16.10
Range Ends：ASME B16.5、ISO7005、DIN2501、ASME B16.47 B Series,
Other size according to the customers
Testing：API598、API6D、ISO5208 RATE A、DIN3230 RATE1
Min. Thickness：ASME B16.34
Temperature：-196℃~650℃
Operation Method：Manual，Penumatic actuator, Electric actuator, Penumatic- hydraulic actuator, Electric-hydraulic actuator
Other standard products can also be produced.
Summary
Large size，High pressure, Replaceable metal seat, Zero-leakage
Special Design:
SEAT: Seat is replaceable in the valve body, When the impurity in the pipe or the wear of long-term service damage the valve seat. Don’t have to replace the whole valve body and only replace a new seat. The maintenance cost of valve is greatly reduced. It is very meaningful in the maintenance of large diameter valves. Stellite is the standard cone seal area of the seat.
Valve Trim (Butterfly Valve Plate): Stellite is the standard cone seal area of the butterfly valve plate, All the seal area built-up welding and machining are made by our factory itself, so the quality meets the requirements of the drawing& the specification and the costs are cheaper.
Stellite surfacing welding technology on the butterfly valve plate seal area, Stellite 6 is the standard, The thickness is ≥3000μm, The hardness is 45HRC, The temperature is up to +550℃. Stellite 6 can be combination best with all weldable materials, such as WCB, 316SS, Duplex SS etc.
Cone Seal:
When finely processed cone seal area of the plate and the seat contact, wedge effect occurs. It is good for sealing.
Bi-directional Shut-off:
Whether the flow direction is the shaft or the seat, the valve is designed to bi-directional shut-off.
Leakage Class:
Triple offset butterfly valve is true metal-to-metal sealing without using secondary elastomeric seals. Guaranteed shut-off class is ASME FCI 70.2 VI, API 598 VI (0~ bubble-tight).
Applications:
HOED Triple offset metal seated butterfly valves are widely used in:
►High temperature flue gas and steam pipeline in power plant;
►With the function of large diameter temperature and flow control valve, discharge pipeline valve and vent pipeline valve in Refining and Chemical plant
►Molecular sieve system valve in air separation plant
►With the function of large diameter temperature and flow control valve, shut-down valve and vent valve of shift gas, raw gas and methanol in synthesis section of coal chemical industry.
►Seawater desalination
