Butterfly valve 14

with handwheelelectrically-actuatedfor water

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. 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.