China Double Eccentric Butterfly Valve DN250 with Wormgear - Reliable Suppliers from Factory
Double Eccentric Butterfly Valve Product Features
GGG40/50 Ductile Iron Body & Disc allows high impact and stretching resistance.
Double Eccentric / Double Offset Disc Design.
Resilient Seated Type.
Disc sealing ring EPDM as default. NBR or VITON options are available.
Block moulded solid/one-piece T-shaped disc sealing ring extends drop-tight sealing life time.
Easy to replace disc sealing ring without dismantling the valve from the pipeline and without dismantling the disc from the valve itself just by taking out the retaining ring.
SS308/316 grade stainless steel welding seat on the body is manufactured through automatic welding machines and microfinished precise milling operation.
Drop-tight closure when fully closed.
Double O-ring feature on both shafts ensures high sealing.
Shafts are equipped with bronze bushings having high corrosion resistance.
Ensures minimized pressure loss and increased energy efficiency with double shaft design.
With the o-rings on the bearing bushings, disc pin holes are protected against corrosion. Dry shaft up to request.
Easy to operate with self-locking gearbox equipped with mechanical indicator.
Low torque requirements during operation.
Easy to install on the line, light weight and occupies less space.
Full coating on the body and disc internally & externally with an average of 250 microns. Higher thicknesses available.
WRAS approved coating available upon request which meets hygienic requirements for potable water.
Maintenance free design for the valve and gearbox.
Default operation is gearbox with ISO top flange ready to connect electrical or pneumatic actuators.
Designed bi-directional according to EN1074-2. Direction arrow on body should be considered during installation.
Operation with extended spindle version is also available.
Balanced positioned lifting holes on the body ease transportation and installation.
Hydrostatic test pressure for seat: PN x 1.1 , for shell: PN x 1.5 according to EN 12266-1.
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Frequently Asked Questions (FAQ)
What materials are used for the body and disc of the valve?
The valve features a GGG40/50 Ductile Iron body and disc, which provides high impact and stretching resistance for durable operation.
Is it difficult to replace the disc sealing ring?
No, the disc sealing ring is designed for easy replacement. It can be replaced without dismantling the valve from the pipeline or removing the disc from the valve itself, simply by taking out the retaining ring.
What type of coating is applied to the butterfly valve?
The valve has a full internal and external coating on the body and disc with an average thickness of 250 microns. A WRAS approved coating for potable water applications is also available upon request.
Can the valve be connected to electrical or pneumatic actuators?
Yes, the default gearbox comes with an ISO top flange ready to connect electrical actuators. Additionally, pneumatic actuators can be installed directly on the top flange of the valve.
What are the hydrostatic test pressure standards for this valve?
According to the EN 12266-1 standard, the hydrostatic test pressure is PN x 1.1 for the seat and PN x 1.5 for the shell.