ࡱ> ceby ^3bjbj *N{{^+ (dA=ggg<<<<<<<$9>@<ggggg<<g <g<|8<@x.q;F<=0A=F;BAqA<A<$ggggggg<<"gggA=ggggAggggggggg : 8211 VERTICAL ASIAL-FLOW PROPELLER PUMP SPECIFICATIONS OPEN LINESHAFT CONSTRUCTION PART 1. GENERAL This specification includes the supply of ____ vertical axial-flow propeller product lubricated open lineshaft pump(s). Each unit shall include a bowl assembly, (optional suction strainer), column and open lineshaft, discharge head (or motor pedestal and discharge elbow), sealing assembly and driver. 1.02 QUALITY ASSURANCE All pumping equipment furnished under this Section shall be of a design and manufacture that has been used in similar applications, and it shall be demonstrated to the satisfaction of the Owner that the quality is equal to equipment made by that manufacturer specifically named herein. Unit responsibility. Pump(s), complete with motor, necessary guards and all other specified accessories and appurtenances shall be furnished by the pump manufacturer to insure compatibility and integrity of the individual components, and provide the specified warranty for all components. The vertical mixed-flow propeller pump(s) specified in this section shall be furnished by and be the product of one manufacturer. Pumps are to be engineered and manufactured under a written Quality Assurance program. The Quality Assurance program is to be in effect for at least ten years, to include a written record of periodic internal and external audits to confirm compliance with such program. Pump(s) are to be engineered and manufactured under the certification of ISO-9001:2000. PERFORMANCE The pump(s) shall be designed for continuous operation under normal service. OPERATION CRITERIA  Flow (GPM) TDH (ft.) Max. Pump Speed (RPM)Max. Solids PassageMax. Shutoff Head (ft.)Minimum Submergence Over Bell (inches)Design ConditionSecondary Condition Total dynamic head shall be as measured at the discharge of the pump and shall include velocity head and vertical static head from the minimum water level to the centerline of the pump discharge. Minimum water level shall be at elevation ________ feet. Pump(s) are to be mounted at _________ feet elevation with the sump floor at _________ feet elevation. Pump discharge centerline shall be at _________feet elevation. Maximum pump speed shall not exceed ______ RPM. Driver size shall be limited to _______ HP maximum in the hydraulic curve range. Liquid pumped is _______ with a maximum temperature of ___ deg. F. Pump(s) shall be operated in the manufacturers published performance curve range. PART 2, PRODUCTS PUMPS Manufacturers Pump(s) shall be the product of Fairbanks Nijhuis. Manufacturer shall have installations of like or similar application with a minimum of 5 years service for this pump size. Design Rotation The pump will be counterclockwise rotation when viewed from the driver end looking at the pump. Propeller The propeller shall be of bronze construction conforming to ASTM B584, C83600. They shall be of one-piece construction, axial-flow ____-vane design capable of passing a ____ solid. Vane leading edges shall be rounded to prevent accumulation of fibrous material. Propeller(s) shall be statically and dynamically balanced to limit vibration and supported on both sides by sleeve-type bearings for stability. Propeller(s) are to be secured to the shaft by means of longitudinal key to prevent axial movement and a snap ring. Propeller location within the bowl shall be adjustable by means of a top shaft-adjusting nut when utilizing a vertical hollow-shaft motor, or by an adjustable coupling when using a vertical solid-shaft motor. Bowls The bowls shall be made of close-grained cast iron conforming to ASTM A48 CL30. Castings shall be free from blowholes, sand holes and shall be accurately machined and fitted to close dimensions. Bowls shall be flange connected. Bowls shall be designed with smooth passages to ensure efficient operation. The bowl assembly shall include a cast iron suction bell of the flared inlet type incorporating a permanently grease-packed bronze bearing. The suction bell shall incorporate a minimum of three guide vanes designed to minimize entrance losses and reduce vortexing. A bronze sand cap shall be provided to prevent entrance of sand into the suction bell bearing. The discharge bowl shall be provided with a bronze bearing immediately above the propeller as well as a bronze connector bearing. OPTIONAL Bronze bowl liners shall be supplied. Liners shall be of bronze construction conforming to ASTM, B505 C93200, or ASTM B584, C83600. Propeller Shaft Propeller shaft shall be of stainless steel construction conforming to ASTM A582 (416 stainless steel) designed to transmit the drive torque required. The shaft shall be supported by bronze bearings located on both sides of each propeller. Propeller shaft coupling shall be of carbon steel construction conforming to ASTM A108 GR12L14. Column Column pipe shall be not less than ___ inches nominal diameter and weigh not less than ___ pounds per foot. Column pipe shall be flanged and furnished in sections not over ten feet in length. Lineshafts Lineshafting shall be of ample size to transmit the torque and operate the pump without distortion or vibration. Lineshafting shall be made of carbon steel conforming to AISI 1045 (or ASTM A582, 416) and be furnished in sections not over ten feet in length. Lineshafting shall be coupled with extra-strong threaded steel (or 416 stainless steel) couplings machined from solid bar steel. Lineshafting shall be fitted with stainless steel replaceable sleeves at each bearing and shall conform to AISI 304 material. Lineshaft bearings shall be of neoprene material construction. Lineshaft bearings shall be retained in bronze guides that are fitted into the column coupling and secured in place by the butted column pipe ends. (For 20 and larger column sizes, retainers will be steel and fabricated into the column assembly. Discharge Head Assembly (above ground, packed box) The pump discharge head shall be of the above ground type of either cast iron for discharge sizes of 8 through 12, or fabricated steel construction for discharge sizes 14 and larger with an ANSI 125# discharge flange. The discharge head shall be of sufficient design to support the entire weight of the pump and driver. If the application uses a variable frequency drive, discharge heads of fabricated steel shall be specifically designed to elevate the discharge head natural frequency above the operating speed. A drive shaft of the same material as the lineshaft shall extend through the sealing assembly of the discharge head and be coupled to a vertical hollow shaft or vertical solid shaft driver. The shaft sealing assembly shall consist of a cast iron packing box, cast iron packing gland, bronze packing box bushing, stainless steel packing gland nuts and bolts and synthetic packing. Packing box shall be rated for 175 PSI. Discharge head openings shall be fitted with guards to prevent injury from the rotating shaft and/or coupling. OR 7. Discharge Head Assembly (above ground, mechanical seal) The pump discharge head shall be of the above ground type of either cast iron or fabricated steel construction with an ANSI 125# discharge flange. The discharge head shall be of sufficient design to support the entire weight of the pump and driver. If the application uses a variable frequency drive, discharge heads of fabricated steel shall be specifically designed to elevate the discharge head natural frequency above the operating speed. A drive shaft of the same material as the lineshaft shall extend through the sealing assembly of the discharge head and be coupled to a vertical solid shaft driver using a spacer type coupling to permit easy field removal of the mechanical seal. (Vertical hollow shaft motors may be used in conjunction with a steady bushing.) The shaft sealing assembly shall consist of a cast iron packing box, bronze packing box bushing, steel gland nuts and bolts and mechanical seal. Packing box shall be rated for 175 PSI. Discharge head openings shall be fitted with guards to prevent injury from the rotating shaft and/or coupling. OR 7. Discharge Head Assembly (below ground, packed box) The pump discharge shall be of the below ground construction and consist of a driver mounting-base, underground elbow and riser pipe. The driver mounting-base shall be of sufficient design to support the entire weight of the pump and driver. If the application uses a variable frequency drive, the mounting-base shall be fabricated steel and specifically designed to elevate the mounting-base natural frequency above the operating speed. The underground elbow shall be of fabricated steel and have an ANSI 125# discharge flange. A driveshaft of the same material as the lineshaft shall extend through the sealing assembly of the driver-mounting base and be coupled to a vertical hollow shaft driver. (Vertical hollow shaft motors may be used in conjunction with a steady bushing.) The shaft sealing assembly shall consist of a cast iron packing box, cast iron packing gland, bronze packing box bushing, stainless steel packing gland nuts and bolts and synthetic packing. Packing box shall be rated for 175 PSI. Driver mounting-base shall be fitted with guards to prevent injury from the rotating shaft and/or coupling. OR Discharge Head Assembly (below ground, mechanical seal) The pump discharge shall be of below ground construction and consist of a driver mounting-base, underground elbow and riser pipe as required. The driver mounting-base shall be of sufficient design to support the entire weight of the pump and driver. If the application uses a variable frequency drive, the mounting-base shall be fabricated steel and specifically designed to elevate the mounting-base natural frequency above the operating speed. The underground elbow shall be of fabricated steel and have an ANSI 125# discharge flange. A drive shaft of the same material as the lineshaft shall extend through the sealing assembly and be coupled to a vertical solids shaft driver using a spacer type coupling to permit easy field removal of the mechanical seal. (Vertical hollow shaft motors may be used in conjunction with a steady bushing.) The shaft sealing assembly shall consist of a cast iron packing box, bronze packing box bushing, steel gland nuts and bolts, and mechanical seal. Packing box shall be rated for 175 PSI. Driver mounting-base shall be fitted with guards to prevent injury from the rotating shaft and/or coupling. Vibration Limitations (Field) The limits of vibration as set forth in the standards of the Hydraulic Institute shall govern. Testing A certified factory performance test shall be performed on each bowl assembly in accordance with Hydraulic Institute Standards, latest edition. Tests shall be sufficient to determine the curves of head, input horsepower, and efficiency relative to capacity from shutoff to 150% of design flow. A minimum of six points, including shutoff, shall be taken for each test. 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