China Three Eccentric Butterfly Valve

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1. Brief introduction of High Performance Quarter Turn Butterfly Valves

The WZSOLID Quarter Turn Valve is a ZERO LEAKAGE metal Seated Valve that features a triple eccentric, non-rubbing conical metal seat which offers tight shut off for many thousands of cycles. The seating of the valve is actually enhanced by continued operation. These unique design features combine to give the Solid valve the following attributes: Bidirectional tight shut off on services ranging from cryogenic to 600 degree centigrade, limitations being governed by the selection of body, disc and seal materials. The Solid is inherently fire safe which means the valve can offer ZERO LEAKAGE before, during and after the fire as there are no soft components in the valve seating areas. Simple direct mounted on ISO standard mounting flanges. The Solid has good control characteristics through most of its travel, and with the addition of a positioned will give control suitable for many applications. The standard valve is wafer pattern conforming to API 609 dimensions and has enormous space and mass savings when compared with other types of valves. Solid valves are also available in full lug and flanged patterns with dimensions in accordance with ISO 5752 or API 600, making them interchangeable with gate, ball and plug valves. As can be seen from the illustration, this design utilizes a wedging action to put the laminated seal ring in compression when in contact with the body seat. Further, as the seal ring has clearance between disc and the inside of the lamellar it is able to self align and also flex to absorb stresses that might be induced by temperature fluctuations or pipeline movement.
2. Structural characteristics of High Performance Quarter Turn Butterfly Valves

The WZSOLID Design is ideal (and proven) for use in Mining Service water applications:
• metal Seating provides longer life
• Compact design
• Ease of 90° operation
• From 16bar to 150bar pressure ratings
• Ideal for Actuated Pump control as it has linear flow Characteristics
metal seated, non-rubbing, "Zero Leakage", bidirectional
• Non-rubbing rotation
• Anti-blowout shaft
• Zero fugitive emission
• Resilient metal seal
• Torque seated
• Inherently fire safe
• Sizes 100mm - 1000mm
(other sizes on application)
• Class ratings ANSI 150 through 900
• PN 10 to PN 150
3. The Application of Large Capacity Heavy Oil Pump
• Mining - Service Water
• Petroleum
• Chemical and Process Plants
• Gas Production and Transportation
• Off-shore Oil and Gas Platforms
• Pulp and Paper
• Emergency Shut Down Valves (ESDs)
• Steel Mills
• Sugar Mills
• Pipeline Isolation
• Low Pressure Steam
• Hot Gases (including Flue Gas)
• Cryogenic Services
• High Cycle and Switching Valves
• Water Treatment and Distribution
• Power Generation

4. Material Combination:

The material selection will determine the suitability of the valve for the service media and the expected temperature range. The responsibility
for final material selection rests with the customer. We can, however, suggest suitable combinations based on our experience. The following
table shows the current material selection that is available, but special materials can be substituted to suit particular applicationsBody and discSeatSpindle and keysLaminated seal ringBearingPacking and GasketsCarbonSteel/ENCStainless steelAISI 431AISI 304Stainless chrome or
nickle platedGraphite/gaphoilStainless steelStellite 21 or
Colmonoy wearresistant
facings17-4ph
AISI 630AISI 316Stellite shellGraphoilAcid resistant alloy
steelsSpecial alloys FAL 223Hardened stainlessGraphite with
Bearing prot graphoilSteels for high
and cryogenic
temperaturesSintered PTFE and
bronze

5. about our Products:

WENZHOU SOLID MECHANICAL EQUIPMENT CO., LTD