Non-Rising Stem, Single Wedge Disc
Fig 768
Designed to withstand severe operating conditions with renewable discs and seats.
Bodies
Proportioned for maximum strength, made of corrosion resistant steam bronze. Extra length pipe threads prevent pipe ends from jamming against seats.
Stems
Resistant to wear, corrosion and embrittlement. Long, accurately machined threads provide full thread contact. Heavy disc-stem connection withstands wearing action when opening valve and prevents stem failure under strain.
Screw-in Bonnets
Heavy bonnet collar with ample thread engagement insures a tight body-bonnet joint.
Discs for non-rising stems
Singe wedge discs are designed with built-in flexibility for pressure tight seating and are bronze in sizes smaller than 1″ and nickel alloy in larger sizes.
Seats
Two types available:
Renewable nickel alloy rings in 1″ and larger sizes.
Integral seats in smaller sizes, precision tapered for accurate seating.
Repacking
Valves are repackable under pressure when wide open. Deep stuffing box and packing nut insure firm thread engagement when fully packed. Back seats above stem threads make scale formation unlikely and provide a tight seal.
Hexagon head gland
Permits the use of a light wrench to easily loosen and raise gland.
Non-slip handwheel
Insures tight closing.
Screw End: Fig 768 (Class 200); Fig 771 (Class 300)
