SALIENT TECHNICAL FEATURES

Manually operated with Gear Box Single Offset Flanged end Butterfly Valve, Size : 500 mm NB with 1 no. spare disc seal of MOC same as supplied valve

Design code IS 13095 /BS 5155/BSEN 593 Material of Construction

Body & Disc: Cast iron as per IS-210 Gr. FG260 /Ductile Iron Grade GGG40/ IS 1865 Gr 500/7

Valve shaft: Stainless Steel ASTM-A-479 type 304/ SS 410 Seat Ring : Stainless Steel ASTM-A-240 type 304

Shaft Bearing: Brass with O-rings for 100% leak tightness Gland Packing: Impregnated Teflon or better for no leakage Disc Seal/O-ring: Nitrile Rubber / EPDM

Clamping ring: Stainless Steel ASTM-A-351 GR CF8 Surface Protection Epoxy powder coating or epoxy liquid Fasteners: Stainless steel

The worm gear box should be self locking, completely water tight and the disc and gear box connecting shaft should have bronze bearings with O rings for zero water leakage including mechanical position indicator.

These valves are required for one to one replacement in our Cooling Tower (Paharpur make) Fluid to be handled : Raw Water,

Temperature range : -5 Deg C to 50 Deg C, End connection : Flat faced Flanged Ends, Pressure rating : PN 10,

OD OF Flange : 705mm, Bolt Circle Dia : 635mm,

Nos. of Holes : 20 (4 holes of flanges are tapped holes M24), Hole Dia : 30mm,

Face to Face : 152mm,