Double Eccentric Butterfly Valve

Product Features

Valve design to EN 593, BS5155, DIN3354
Flange to EN 1092, ASME B16.5, ASME B16.1, AWWA C207
Face to face length to EN 558-1 / ISO 5752 series 14 or series 13

• Stainless steel weld and finished body seat ensures a corrosion and wear resistant seat face.
• Streamlined low profiled disc design verified by finite element analysis ensures the higher strength and the lower flow resistance
• By means of seal gasket designed at joint between shaft bearing and disc, double O ring on shaft bearing and closed disc eyes, they form a dry operating condition for shaft and shaft seal to avoid the corrosion from service medium.
• Anti-blow out shaft design.
• Disc to shaft connection by means of taper pin or key(optional).
• Self lubricating bearing in bronze or stainless steel lined PTFE reduce shaft friction and operating torque, the bearings keep the disc in center and prevent axial movements;
• Multiple O rings in shaft sealing system could prevent outleakage and dirt into. The O rings on packing gland and shaft cover could be replaced easily without removing the valve from pipeline.
• Suitable for full vacuum service conditions.
• T profiled resilient seal ring is secured on the disc by a retainer ring and bolts, and ensures reliable sealing performance in double direction. The seal ring could be adjusted or replaced easily on site. Don’t need special tools.
• External locking device will be provided on the non-drive shaft ends, to enable the gear to be removed with the valve remaining in service in the open or closed position.
• Disc locking pin design is available as client’s request.
• Operated with gearbox + handwheel and with ISO 5210 top flange to be coupled with an electric actuator, if required at a later date.
• Valve externally and internally fusion bonded epoxy coated with a thickness of 250micron (different coating/lining is available as special request) and color code RAL5005/5015/5017.
• Suitable for the applications involving throttling service and for applications requiring valve actuation after long periods of inactivity.

Product Material

Product Dimension

Dimensions/PN10

Dimensions/PN16

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