Model No. 60-08 or 660-08 BOOSTER PUMP CONTROL VALVE Size: 2 1/2" - 24" Function The booster pump control valve is designed for installation on the discharge of booster pumps to eliminate starting and stopping surges caused by the pump. The valve shall be equipped with a built-in lift-type check feature to prevent reverse flow, operating independently of the solenoid control. Main Control Valve The valve shall be hydraulically operated, single diaphragm actuated, globe pattern valve. A resilient synthetic rubber disc shall have a rectangular cross section and shall be retained on three and one-half sides to assure proper gripping under extreme hydraulic conditions. The two piece stainless steel valve stem shall be guided by two bearings located in the cover and intermediate body. The main valve shall consist of two distinct operating chambers that are detachable and completely independent of the flow through the main valve body. Main Control Valve The valve shall consist of four components: the body with seat installed, the power unit body with center bearing installed, the cover with cover bearing installed, and the diaphragm assembly. No fabrication or welding shall be used in the manufacturing process. The diaphragm assembly shall be the only moving part and shall form a seal between the two operating chambers. Packing glands and/or stuffing boxes are not permitted. There shall be no pistons operating the main valve or pilot controls. The valve shall contain a resilient, synthetic rubber disc with a rectangular cross-section contained on three and one-half sides by a disc retainer and forming a tight seal against a single removable seat insert. No O-ring type discs (circular, square, or quad type) shall be permitted as the seating surface. The disc guide shall be of the contoured type to permit smooth transition of flow and shall hold the disc firmly in place. The disc retainer shall be of a sturdy one piece design capable of withstanding line shocks due to abnormal pump stoppage. No hourglass-shaped disc retainers shall be permitted and no V-type disc guides shall be used. The diaphragm assembly containing a non-magnetic two-piece stainless steel stem of sufficient diameter to withstand high hydraulic pressures shall be guided by two bearings; in the valve cover and the power-unit body. The built-in lift type check function shall be created by the lower portion of the diaphragm assembly being free to close when the operating differential is at zero and is designed to prevent pressure reversal caused by power failure. The upper stem shall be drilled and tapped in the cover end to receive and affix such accessories as may be deemed necessary. The main valve lower stem assembly shall include the resilient, synthetic rubber disc, the disc retainer, the disc guide, and the lower stem. The lower stem shall fit into a guide machined into the lower portion of the upper stem so to continuously remain in contact with lower stem with very low friction. The lower stem assembly shall remain fully engaged in the uppermost position of the upper stem guide throughout the entire valve stroke and shall independently lower to seal against the valve seat only when the valve pressure differential reverses. The flexible, non-wicking, FDA-approved diaphragm shall consist of nylon fabric bonded with synthetic rubber compatible with the operating fluid. The center hole for the main valve stem must be sealed by the vulcanized process or a rubber grommet sealing the center stem hole from the operating pressure. The diaphragm shall be fully supported in the valve body and cover by machined surfaces which support no less than one half of the total surface area of the diaphragm in either the fully open or fully closed position. The main valve seat, the power-unit body and the stem bearing in the valve cover shall be removable. The cover bearing and seat in 6" and smaller size valves shall be threaded into the cover and body. The valve seat in 8" and larger size valves shall be retained by flat head machine screws for ease of maintenance. To insure proper alignment of the valve stem, the valve body, the power-unit body, and the valve cover shall be machined with a locating lip arrangement. No "pinned" covers to the valve body shall be permitted. All necessary repairs and/or modifications other than replacement of the main valve body shall be possible without removing the valve from the pipeline. Valve shall meet NSF-61/ANSI standards for drinking water contact. The valve manufacturer shall warranty the valve to be free of defects in material and workmanship for a period of three years from date of shipment provided the valve is installed and used in accordance with all applicable instructions. Electrical components shall have a one year warranty. The valve manufacturer shall be able to supply a complete line of equipment from 2 1/2" through 24" sizes and a complete selection of complementary equipment. Main Valve Material Specification Valve Size: Main Valve Body and Cover: Main Valve Trim: End Detail: Pressure Rating: Temperature Range: Rubber Material: Pilot Control System The valve operation shall be controlled by an externally mounted pilot control system with a four-way solenoid operated pilot control. The solenoid pilot valve shall be designed to operate on AC current and have a manual-operator installed and shall be rated to maximum 500 psi operating differential pressure. It shall be of brass with Kanigen plating and stainless steel construction. It shall have a continuous duty, molded coil and integral enclosure with NEMA ratings of 1, 2, 3, 3S, 4, and 4X general-purpose, watertight and NEMA ratings of 6, 6P, 7, and 9 watertight and explosion-proof. The pilot system shall control valve operating pressure alternately applied to either of the two control chambers of the main valve to open and close the main valve when signaled as shown by the electrical interlock wiring diagram. Pilot system components shall include: four-way solenoid pilot valve, opening and closing speed controls, shut-off isolation valves, strainers and CVS-1 shuttle valve to provide the highest available operating pressure to the pilot system. Limit Switch An adjustable limit switch assembly shall be mounted on the main valve, connected to the main valve stem. It shall be actuated by opening or closing of the valve and easily adjusted to operate at either point of the valve's travel. The limit switch will be used to complete the pump off cycle. The actuating point of the limit switch shall be adjustable. A direct factory representative shall be made available for start-up service, inspection, and necessary adjustments. Pilot Control System Material Specification: Control Components: Tubing and Fittings: Operating Fluids: Seals: Solenoid Voltage: Solenoid Coil Enclosure: The valve shall be a Cla-Val Co. Model No. 60-08 or 660-08 Booster Pump Control Valve as manufactured by Cla-Val Company, Newport Beach, California, 92659-0325.