Fig 3125

Union bonnet valves provide strong, safe reliable service in industrial applications. The bonnet is centered by a lip extending into the neck of the valve, securely held in place so that it cannot be accidentally backed out of position.

Bonnets Union Design

Heavy bonnet rings are octagonal to provide a firm wrench hold and increase strength.

Bodies

Full, cylindrical body minimizes distortion. Octagonal pipe ends. Diaphragm configuration practically eliminates distortion of diaphragms by pipe ends. Disc guide channels are beveled at top of body for easy assembly.

Stems

Resistent 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.

Repacking

Valves are repackable under pressure when wide open. Stuffing box and packing nut are exceptionally deep to insure firm thread engagement when fully packed. Back seats above stem threads make scale formation unlikely and provide a tight seal.

Discs

Renewable. Double wedge (Uni-ball construction): Disc readily adjusts to the seat taper, insuring a tight valve. Sturdy disc collar strengthens disc-stem connection. Easy to assemble and with valve wide open the disc is drawn up into the bonnet and cannot drop off stem.

Seats

Integral. Accurately tapered to insure perfect seating of the discs.

Hexagon head gland

Permits the use of a light wrench to easily loosen and raise gland.

Non-slip handwheel

Insures tight closing.

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Screw end: Fig 3125 (Class 125); Fig 3150 (Class 150)

Class 125: Fig 3125 – Specs
Class 150: Fig 3150 – Specs