M & H 4500

• AWWA Class 150-B Butterfly Valves
• Suggested Specifications: 4" Thru 24"
• Butterfly Valves with Operator
• Specifications by Body Type & Operator

A. GENERAL

All butterfly valves shall be of the rubber-seated tight-closing type. They shall meet or exceed AWWA Standard C504. All valves shall be M&H 4500 butterfly valves, or approved equal.

Both valve ends shall be mechanical-joint (or other, as available) per AWWA Standard C111. Accessories (bolts, glands, and gaskets) shall be supplied by the valve manufacturer.

All valves must use full AWWA C504 Class 150B valve shaft diameter, and full C class 150 B underground-service-operator torque rating throughout entire travel, to provide capability for operation in emergency service.

B. VALVE

Valve body shall be high-strength cast iron ASTM A126 Class B with 18-8 Type 304 stainless steel body seat. Valve vane shall be high-strength cast iron ASTM A48 Class 40, having rubber seat mechanically secured with an integral 18-8 stainless steel clamp ring and 18-8 stainless steel self-locked screws.

Rubber seat shall be a full-circle 360o seat not penetrated by the valve shaft. For valves 4"-12" the valve shaft shall be one piece, extending full size through the entire valve.

For 14" and larger, valve shaft shall be 18-8 stainless steel stub shaft design keyed to the vane with stainless steel taper pins.

Body Type

All butterfly valves shall be of the rubber-seated tight-closing type. They shall meet or exceed AWWA Standard C504. All valves shall be M&H butterfly valves, or approved equal.

Valve ends shall be: (Select desired)

Wafer Type Body - Suitable for installation between 125# or 150# ASA flanges. (Available 4" thru 20")

Flanged - Short body valves per Table 2 of AWWA Spec. C504. Flanges shall be 125# ANSI. (Available all sizes.) Also flanged by AC ends in 6", 8" and 12" sizes, and flanged by MJ in 6", 8", 12" and 16" sizes.

Mechanical Joint - Both ends of valve shall be "MJ" per AWWA C111. "MJ" accessories (bolts, glands, gaskets) must be supplied by valve manufacturer. (Available all sizes-also flanged by MJ in 6", 8", 12" and 16" sizes.)

C. OPERATOR

Underground
Valve operator shall be of the traveling-nut type, sealed, gasketed, and lubricated for underground service. It shall be capable of withstanding an overload input torque of 450 ft. lbs. at full-open or -closed position without damage to the valve or valve operator. It shall be designed for submergence in water to 25ft. head pressure for up to 72 hours. Number of turns to operate valve shall be as listed below in order to closely resemble conventional distribution valve practices; and to minimize water hammer.

Valve shall be capable of easy closure by one man using standard valve key, even under emergency line-break conditions as severe as those that would cause a valve maximum opening torque requirement of as much as two times AWWA Class 150B.

All valves shall open left(right), and be equipped with 2" AWWA operating nut.

Crank, Handwheel or Chainwheel - All manual operators for service other than underground shall have position indicator and shall be totally enclosed and permanently lubricated. In any event, a maximum pull of 80 lbs. on the crank or wheel shall produce full Table 1 output torque throughout entire travel. Operators shall accept 300 lbs. pull on crank or wheel at full-open and closed positions without damage to valve or operator. Operators shall be of the "Traveling-Nut" type. All valves shall open left (clockwise to close.)

Cylinder - Cylinder operator shall be of the base mounted configuration. Cylinder barrel shall be of molybdenum-disulfide lined glass fiber reinforced epoxy tubing, to provide a corrosion-free, self-lubricated high strength barrel. Rod seal shall be of urethane, molybdenum-disulfide filled, to provide a self-lubricated, long life seal.