CCPV-OM2 - Val-Matic Valve and Manufacturing Corp.

VAL-MATIC'S CAM-CENTRIC PLUG VALVEOPERATION, MAINTENANCE AND INSTALLATIONINTRODUCTIONThe Cam-Centric Plug Valve has been designed togive years of trouble-free operation. This manual willprovide you with the information to properly install andmaintain the valve to ensure a long service life. Thevalve is an eccentric, resilient seated, quarter-turn plugvalve capable of handling many types of fluidsincluding fluids with suspended solids. The Size,Cold Working Pressure (CWP), Actuator Rating, andModel No. are stamped on the nameplate forreference.CAUTION: Do not use valve for line testing atpressures higher than nameplate rating orleakage and damage to valve may occur.The "Cold Working Pressure" is the non-shockpressure rating of the valve at 150 o F. The valve is notintended as a block valve for line testing above thevalve rating. The “Actuator Rating” is the pressure thatwas used to size the actuator for operating conditionsand may be less than the “Cold Working Pressure”.Because the valve is eccentric, the valve may have adifferent actuator rating for reverse and direct pressure.If the valve is operated at pressures higher than theactuator ratings, the valve may be difficult to operate orleak.RECEIVING AND STORAGEInspect valves upon receipt for damage in shipment.Unload all valves carefully to the ground withoutdropping. Do not lift valves with slings or chainsaround the actuator or through the seat area.FIGURE 1. PLUG VALVE WITH GEAR ACTUATORThe eccentric offset causes the plug to lift and rotateoff the seat simultaneously to reduce seat friction andwear during operation. Direct Pressure pushes theplug into the seat and Reverse Pressure pushes theplug away from the seat. The valve can be operatedwith a direct nut, lever, or gear actuator. The gearactuator as shown in Figure 1 requires multi-turn inputon a 2” square nut, handwheel, or chainwheel. Thevalve can also be automated with power actuatorssuch as an electric motor or hydraulic cylinder.Valves should remain crated, clean and dry untilinstalled to prevent weather-related damage. For longterm storage greater than six months, the valve mustremain open and the rubber surfaces of the plugcoated with a thin film of FDA approved grease suchas Dow Corning # 7. Do not expose plug to sunlight orozone for any extended period.DESCRIPTION OF OPERATIONAs shown in Figure 2, the valve consists of a body andquarter-turn plug that is offset from the seat centerline.FIGURE 2. PLUG VALVE TERMS2