Series 810

Mosser Series 810 Butterfly Valves

Specifications

     All 4" and larger butterfly valves shall be of the tight closing, rubber seated type conforming to the design standards of the latest revision of AWWA C-504. Valves shall be the product of a manufacturer who is experienced in butterfly vale design and construction and who has regularly produced to AWWA specifications for at least 15 years. Valves shall be bubble tight at rated pressure in either direction and shall be suitable for throttling service and/or operation over long periods of inactivity. All valves shall be of significant US content of at least 80 percent and shall be certified to the actual percent of content.

Body

     All valve bodies shall be constructed of cast iron ASTM A-126 Grade B with true ANSI B16.1 flange thickness and drilling.

Disc

     Valve disc shall be constructed of cast iron ASTM A-48 Class 40, ductile iron ASTM A-536 or steel alloy. Valve disc shall be capable of receiving a stainless steel disc edge. Shafts shall be of solid stainless steel and correspond to the design requirements of AWWA C-504 latest revision. A shake proof connection of the disc to the shaft shall be provided without impairing shaft strength.

Bearing

     All shaft bearings shall be of the self-lubrication corrosion-resistant type. Bearings shall be designed for vertical or horizontal shaft loading.

     All valves shall utilize a self adjustable v-ring polypack packing set that is positively retained to the body.

Finish

     All interior and exterior finishes shall be in accordance with the latest revision of AWWA C-504.

Testing

     All valves shall be hydrostatic and lead tested in accordance with the latest revision of AWWA C-504.

Actuator Sizing

     Operators for Mosser 810 series butterfly valves are sized to meet the torque requirements for individual pressures and flow conditions. They provide smooth continuous torque output for seating, unseating and valve movement under all conditions in an given application. Pneumatic, Hydraulic and electric actuators can be furnished for open/close or throttling applications.

     Manual gear type operators will require 80 pounds or less input force to produce torque sufficient to fully cycle the valve under full flow and pressure. All manual gear units have standard AWWA stop limiting device and valve position indicator.