AWWA C504 Butterfly Valve

Description

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

Valve design, materials and testing conform to requirements of AWWA C504
Robust body with min. shell thickness to the standard, and of ductile iron ASTM A536 grade 65-45-12 or grade 60-40-18
Body with flange X flange ends of flat face, flange drill to ASME B16.1, ASME B16.5, AWWA C207
Victaulic grooved ends or other type of connection ends are also available.
Solid single disc or lattice disc(for larger sizes) both with high strength, greater free flow area.
Higher Cv and lower head loss/pressure drop
Rubber seat located on disc, the full 360°uninterruptible seal ring secured with a retainer ring for bidirectional service up to full rated pressure, and easy for adjustment and replacement without special tools.
Two-piece, stub-type shaft of corrosion-resistant material SS630, other materials available as request.
The body seat ring is made of stainless steel weld, micro-finished with long service time.
Aluminum bronze shaft bush in both trunnions of body with high bearing strength, maintenance free.
Multiple O rings on the bearing bush and V shaft packing form reliable shaft sealing system.
V type shaft packing and extended top bracket design, to realize the online adjustment and replacement of shaft packing without disassembly of the gearbox.
Disc to shaft connection by SS630 taper pins. Other methods available as request.
Cycle tested per AWWA C504 requirements, proven reliability over the life of the valve
Actuation options: Manual gearbox with handwheel or chainwheel,
Gearbox with ISO5210 top works for electric actuator,
Electric actuator
Hydraulic or pneumatic cylinder
Protection coating: fusion bonded epoxy coating non-toxic to potable water approved from WRAS/NSF.
Other options:
– Shaft locking device(during equipment maintenance, even removing the valve operation mechanism, the valve can be kept in full close/full opening position.
– The material solution of Aluminum bronze/nickel aluminum bronze( such as ASTM B148 C95400/C95500/C95800 body & disc and nickel-copper alloy(such as Monel k500 etc.) shaft is available for desalination of sea water project.
– Rubber lining(ebonite lining)
– Extended bonnet