D. Pump shall be designed for hydraulic cartlift service, having a steady discharge without pulsation to give smooth and quiet operation. Pump output shall be capable of lifting cartlift with rated capacity, with a speed variation of no more than five (5) percent between no load and full load. Hydraulic fluid by-pass shall discharge directly into storage tank. E. Provide motor specifically designed for cartlift service, synchronous speed not more than 1800 RPM, not to exceed nameplate full load current by more than 10%, and rated 120 starts per hour without exceeding a rise of 40 degrees C. F. Provide isolation units of rubber to prevent transmission of pump and motor vibration to the building. 2.12 HYDRAULIC SYSTEM A. Construct the storage tank of sheet steel, welded construction, and a steel cover with means for filling, a minimum one-inch protected vent opening, and a valve drain connection. Tank shall be sized to pass through machine room door as shown on drawings. Provide marked gauge to monitor hydraulic fluid level. Tank shall be sized to hold volume of hydraulic fluid required to lift cartlift to stop ring, plus a reserve of not less than ten gallons. Provide a baffle in the bottom of the tank to prevent entry of any sediment or foreign particles into hydraulic system. Baffle shall also minimize aeration of hydraulic fluid. Permissible minimum hydraulic fluid level shall be clearly indicated. Hydraulic fluid shall be of good grade to assure free flow when cool, and have minimum flash point of 380-400 degrees F. Provide initial supply of hydraulic fluid for operation of elevator. 1. Provide a means to maintain the fluid viscosity in the reservoir, pump, and control valve at a recommended operating temperature. 2. Provide a data plate on the tank framing indicating the characteristics of the hydraulic fluid used. B. Furnish and install connections between the storage tank, pump, muffler, operating valves, and cylinder complete with necessary valves, pipe supports, and fittings. Pipe shall be minimum schedule 40 steel with threaded, flanged, or welded mechanical couplings. Size of pipe and couplings between cylinder and pumping unit shall be such that fluid pressure loss is limited to 10 percent. C. Do not subject valves, piping, and fittings to working pressure greater than those recommended by the manufacturer.
D. Pump shall be designed for hydraulic cartlift service, having a steady discharge without pulsation to give smooth and quiet operation. Pump output shall be capable of lifting cartlift with rated capacity, with a speed variation of no more than five (5) percent between no load and full load. Hydraulic fluid by-pass shall discharge directly into storage tank. E. Provide motor specifically designed for cartlift service, synchronous speed not more than 1800 RPM, not to exceed nameplate full load current by more than 10%, and rated 120 starts per hour without exceeding a rise of 40 degrees C. F. Provide isolation units of rubber to prevent transmission of pump and motor vibration to the building. 2.12 HYDRAULIC SYSTEM A. Construct the storage tank of sheet steel, welded construction, and a steel cover with means for filling, a minimum one-inch protected vent opening, and a valve drain connection. Tank shall be sized to pass through machine room door as shown on drawings. Provide marked gauge to monitor hydraulic fluid level. Tank shall be sized to hold volume of hydraulic fluid required to lift cartlift to stop ring, plus a reserve of not less than ten gallons. Provide a baffle in the bottom of the tank to prevent entry of any sediment or foreign particles into hydraulic system. Baffle shall also minimize aeration of hydraulic fluid. Permissible minimum hydraulic fluid level shall be clearly indicated. Hydraulic fluid shall be of good grade to assure free flow when cool, and have minimum flash point of 380-400 degrees F. Provide initial supply of hydraulic fluid for operation of elevator. 1. Provide a means to maintain the fluid viscosity in the reservoir, pump, and control valve at a recommended operating temperature. 2. Provide a data plate on the tank framing indicating the characteristics of the hydraulic fluid used. B. Furnish and install connections between the storage tank, pump, muffler, operating valves, and cylinder complete with necessary valves, pipe supports, and fittings. Pipe shall be minimum schedule 40 steel with threaded, flanged, or welded mechanical couplings. Size of pipe and couplings between cylinder and pumping unit shall be such that fluid pressure loss is limited to 10 percent. C. Do not subject valves, piping, and fittings to working pressure greater than those recommended by the manufacturer.