Series 1510 Centrifugal Pumps Technical Bulletin. Bulletin B-207G Bell & Gossett

Transcription

1 Bulletin B-7G Bell & Gossett Series 1 Centrifugal Pumps Technical Bulletin For hydronic heating and cooling systems, industrial, pressure boosting and general pumping applications High efficiency, low operating costs Easy maintenance Seal options Part of the Bell & Gossett Equipment Selection Program

2 Table of Contents Useful Pump Formulas Standard Features Technical Data Materials of Construction Selection Charts Performance Curves Centrifugal Pump Dimensions The B&G End Suction Pump System Typical Specifications Useful Pump Formulas Pressure Head (Feet) x Specific Gravity = (PSI) 2.1 Head Pressure (PSI) x 2.1 = (Feet) Specific Gravity Vacuum Dynamic Suction Lift (Feet) x.88 = (Inches of Mercury) x Specific Gravity Horsepower GPM x Head (Feet) x Specific Gravity = (Brake) 960 x Pump Efficiency Horsepower GPM x Head (Feet) x Specific Gravity = (Water) 960 Efficiency = (Pump) NPSH = (Available) Horsepower (Water) x 0 Per Cent Horsepower (Brake) Positive Factors Negative Factors Affinity Laws: Effect of change of speed or impeller diameter on centrifugal pumps. Impeller Diameter Change GPM Capacity Ft. Head BHP Q2 = D2 Q1 D1 2 H2 = ( D2 D1 ) H1 P2 = ( D2 D1 ) P1 Speed Change Q2 = RPM2 Q1 RPM1 H2 = ( RPM2 RPM1 2 ) H1 P2 = ( RPM2 RPM1 ) P1 Where Q = GPM, H = Head, P = BHP, D = Impeller Dia., RPM = Pump Speed 2

3 Take away these seven standard features and you ll have a pump like everyone else s. TRUE BACK PULLOUT A B&G standard in design and construction. Ease in service is assured, while piping and motor remain undisturbed. Extended delays for repairs are virtually eliminated. INTERNALLY SELF-FLUSHING MECHANICAL SEAL This design is way ahead of its time. This unique seal design is proven in many years of service. It requires no special external flushing provisions, since the design provides for constant efficient flushing action internally. This standard feature ensures maximum seal face lubrication, heat dissipation and debris removal without vulnerable, external flush tubing. The internal flushing action passes two and a half to three times the flow over the seal faces compared to a few GPM for conventional, stuffing-box designed pumps. SOLID-FOOT MOUNTED VOLUTE All Series 1 pumps are provided as standard with an integrally cast volute foot located directly beneath the pump volute. This integrally cast foot ensures that the alignment between the volute and motor assembly is maintained. Without solid support beneath the volute, the piping weight alone will cause distortion which can lead to premature failure of the bearings, shaft and mechanical seal. This feature is equally important on hot water applications. The Series 1 volute foot provides a solid foundation and eliminates the deflections which would otherwise exist within an unsupported overhung volute during the normal thermal expansion of the system piping against the volute. COMPUTER CONTROLLED IMPELLER BALANCING 1 impellers are balanced to HI/ANSI section , balance grade G6. standards. This method of computer balancing Impellers provides for quiet, efficient, vibration free performance. Diameters are computer selected at the factory to furnish assurance that your capacity requirements will be met. CENTER DROP-OUT SPACER COUPLING Unlike conventional jaw type or rigid style couplings, a center drop-out spacer coupling allows removal of the bearing frame and rotating element without disturbing the pump end pipe alignment or motor electrical connections. HEAVY DUTY, RUGGED BASEPLATE The Bell & Gossett fabricated heavy duty baseplate is supplied as standard on every Series 1 pump. Unlike rolled steel and C channel baseplates, the Series 1 baseplate provides a heavy duty saddle assembly, full seam welds, closed baseplate ends and an open top to provide ease of access for proper equipment grouting. ANSI/OSHA-COMPLIANT COUPLING GUARD The coupler guard complies with ANSI B1.1, Section 8 and OSHA The guard offers increased protection against potential injuries and is standard on all 1 pumps. The guards include slotted viewing windows for easy inspection.

4 Technical Data BALANCE STANDARDS Impellers are balanced to Hydraulic Institute Standards (ANSI/HI ), section Refer to Figure 1.6. The allowable residual unbalance in the impeller rotating assembly conforms to ANSI grade G6.. ANSI Balance Quality Grades of G2. and G1 for the rotating assembly are also available. Consult your local Bell & Gossett Representative for additional details. VIBRATION LIMITS Series 1 pumps conform to Hydraulic Institute ANSI/HI , section for recommended acceptable unfiltered field vibration limits (as measured at the pump bearings per H.I , Figure 1.8.) for pumps with rolling contact bearings. OVERALL DISPLACEMENT (Unfiltered) PUMP SPEED RPM Peak to Peak-Mils (.001") SEISMIC CAPABILITIES Series 1 pumps are capable of withstanding a horizontal load of 0.g* without adversely affecting pump operation. *Piping and/or fasteners used to anchor the pump to the mounting pads on the floor are excluded. MECHANICAL SEAL Seal Features Standard Seal Type B&G Internally Flushed Seal Yes Enlarged Seal Chamber Yes Standard Seal Construction Buna-Carbon-Ceramic Standard Working Pressure 17 psig (12 Bar) Maximum Working Pressure psig (17 Bar) Standard Seal Temperature Rating 22 deg F (7 C) Optional Temperature Rating deg F (121 C) The ceramic material is 99.% pure alumina oxide, ceramic seat hardness of 68 Rockwell C, or a tensile strength of 00,000 psi.

5 Materials of Construction 1 Gauge Tapping 9 Volute Gasket Seal Assembly Shaft Vent Plug 2 Volute Impeller Gauge Tapping Bronze Casing Wearing Ring (Optional) 1 Packing Packing Gland Shaft 9 Volute Gasket 2 Volute Gauge Tapping Lantern Ring Impeller Gauge Tapping Bronze Casing Wearing Ring (Optional) Slinger Slinger Shaft Sleeve Impeller Key 6 Impeller Washer 7 Impeller Lock Washer Impeller Cap Screw Shaft Sleeve Impeller Key 6 Impeller Washer 7 Impeller Lock Washer Impeller Cap Screw Drain Plug Standard Configuration Optional S Configuration BRONZE FITTED ALL IRON ALL BRONZE PUMP (STANDARD PUMP PUMP* DESCRIPTION CONFIGURATION) (OPTIONAL) (OPTIONAL) 11 Shaft Steel SAE 11 Steel SAE 11 Steel SAE Volute Cast Iron Cast Iron Cast Bronze ASTM #A19 ASTM #A19 ASTM #B8 1 Impeller Cast Bronze Cast Iron Cast Bronze ASTM #B8 ASTM #A19 ASTM #B8 1 Shaft Sleeve Aluminum Bronze #0 Stainless Steel Aluminum Bronze ASTM #B111 ASTM #A12 ASTM #B111 1 Impeller Key #0 Stainless Steel #0 Stainless Steel #0 Stainless Steel Impeller Washer 1 Steel Stainless Steel Brass 17 Impeller Lock Washer #0 Stainless Steel #0 Stainless Steel #0 Stainless Steel 18 Impeller Cap Screw #0 Stainless Steel #0 Stainless Steel #0 Stainless Steel 19 Volute Gasket Cellulose Fiber Cellulose Fiber Cellulose Fiber Seal Assemblies Standard Seal Bellows Buna N Buna N Buna N Faces Carbon-Ceramic Carbon-Ceramic Carbon-Ceramic Metal Parts Brass Stainless Steel Brass Spring Stainless Steel Stainless Steel Stainless Steel For Stuffing Box A Flushed Single O-Rings EPR EPR Faces Carbon-Tungsten Carbon-Tungsten Carbide Carbide Metal Parts Stainless Steel Stainless Steel Spring Stainless Steel Stainless Steel Packed Packing Graphited Graphited Impregnated Teflon Impregnated Teflon Gland Bronze Cast Iron Lantern Ring Filled TFE Filled TFE * All Bronze Construction NOT available in following sizes: 1 1 /2AC, AC, BC, AC, A, BC, BC, 6BC, all E, and all G sizes, or stuffing box configuration. ** For operating temperatures above F, a cooled flush is required and is recommended for temperatures above 22 F for optimum seal life. On closed systems, cooling is accomplished by inserting a small heat exchanger in the flush line to cool the fluid. Flush-line Filters and Sediment Separators are available on special request. OPTIONAL FEATURES All Iron Construction All Bronze Construction* Bronze Casing Wear Ring Stainless Steel Shaft Sleeve Stainless Steel Shaft Drip Pan EPT/Tungsten Carbide Seal (Standard Configuration only) Stuffing Box Construction with several seal and packing options SEAL SELECTION GUIDE FOR: A. STANDARD SEALS BUNA-PH Limitations 7-9; Temperature Range F to +22 F EPT-PH Limitations 7-11; Temperature Range F to + F For use on open or closed clear water systems. Maximum working pressure 17 psi. B. FLUSHED SINGLE SEALS (Stuffing Box Design) PH Limitations 7-11; Temperature Range F to +00 F** For use on closed or open systems where the temperature or pressure requirements exceed the limitations of the standard seal. Available in 17 psi, or psi working pressures. C. FLUSHED DOUBLE SEALS (Stuffing Box Design) PH Limitations 7-9; Temperature Range 0 F to + F For use on closed or open low pressure systems which may contain a high concentration of abrasives. An external flush is required. Maximum working pressure 17 psi. D. PACKING (Stuffing Box Design) PH Limitations 7-9; Temperature Range 0 F to +190 F For use on open or closed systems which require a large amount of make-up water, as well as systems which are subjected to widely varying chemical conditions and solids buildup.

6 Selection Charts Hz RPM TOTAL HEAD, ft. of water RPM 1 RPM Hz CAPACITY, gpm 2900 RPM TOTAL HEAD, ft. of water RPM CAPACITY, gpm 6

7 Series 1 Performance Curves RPM G TOTAL HEAD, FEET BC BC G 2E E E 2BC 22 1 BB BC GB G E BC BC 6E 6BC 6G 8G AC AC 2AC AB AC AC A CAPACITY IN U.S. GALLONS PER MINUTE RPM E TOTAL HEAD, FEET BC BC 2BC E BB BC E BC AC AC 2AC AB AC AC A CAPACITY IN U.S. GALLONS PER MINUTE 7

8 Dimensions DISCHARGE Z HA HO Series 1 Centrifugal Pumps HD SUCTION Y HL HP GAUGE TAPPINGS* HB Motor Horsepower and Frame Tabulation three phase (Dripproof Enclosure) Horsepower 170 RPM 00 RPM Horsepower 170 RPM 00 RPM. 1 /2 6 26T 2T T 26T 1. 1T 0 286T 28TS 1. 1 /2 1T 0 2T 286TS 2. 1T 1T 0 26T 2TS. 182T 1T 60 6T 26TS. 18T 182T 7 6T 6TS 7. 1 /2 21T 18T 0 0TS 6TS. 21T 21T 12 0TS 1. 2T 21T *Gauge Tapping Sizes: 1 " for NPT, 1 " for flanged sizes STANDARD MECHANICAL SEAL STUFFING BOX CONSTRUCTION DIMENSIONS INCHES (MM) PUMP MODEL 1, 1-F PUMP MODEL 1-PF, 1-S PUMP SIZE SUCTION MOTOR FRAME DISCHARGE SIZE SIZE HA HB HD HL HO HP Y Z HA HB HD HL HO HP Y Z AC 1T-1T (0) (70) 9 (79) 1 1 /2 (NPT) 182T-18T 1(787) (28) 1 (7) (11) 1 (879) /2 (28) () (7) (11) 1 1 /2 21T-21T (879) (6) (71) 9 (00) (76) 1 1 (76) (NPT) 1T-1T / 18 (8) (71) 1 1 BC 182T-18T (787) 1 1 / 18 (8) (879) (27) (6) (76) (27) (6) (76) (NPT) 21T-21T 9 (00) 1 /2 6 1 /2(1181) /2 12 2T-26T 6 1 /2 12(0) 2 1 / (08) () 1 (0) 2 1 / (08) () (7) 28TS-286TS (1181) 1(0) (7) 21() (11) 1(0) 21() / 1 1 /2 AC 1T-1T (0) (70) 9 (78) / 1 (879) (NPT) 182T-18T 1(787) (28) (00) (117) (71) (28) () (00) (76) (117) 21T-21T (879) 9 (00) 2T-26T 9 (00) (2) 6 1 /2(1181) 12(0) 2 1 /(71) 18(7) 2 1T-1T (76) 11 / 1 1 (NPT) 182T-18T (71) (787) () 17 (79) 1 1 (879) 1 11 / 17 1 (79) (27) (71) (27) () (8) (76) 1 1 /2 BC 21T-170 (879) (8) 9 (00) (NPT) 21T-21T-00 9 (00) () 6 1 /2(1181) /2 () 2T-26T 6 1 /2 12(0) 2 1 / 18 1 /2(70) 1 (0) 2 1 / (70) (71) 28TS-286TS (1181) 1(0) (71) 19 1 /2(9) (11) 1(0) 19 1 /2(9) 2 AC / / 1 1T-1T (0) (70) 9 (90) 1 (71) (879) (28) (6) (1) (76) 182T-18T 1(787) (28) (1) 1 /2 1 /2 2 (89) (121) (89) (121) 21T-21T (879) / 6 1 /2(1181) 11(279) / 17 1 /2() (6) 2T-26T 9 (00) 17 1 (8) (76) 1 (11) 12(0) (8) 18 1 /2(70) /2 1T-1T 1 (71) 182T-18T (787) 2 11 / 1 17 (879) 2 11 / 17 (27) (68) (71) (27) (68) (1) (76) 21T-21T-170 (879) (1) 9 (00) 2 BC 2T-00 9 (00) 6 1 /2(1181) (2) (19) (2) (19) 2T-26T 12(0) 1 / 19(8) (0) (8) 1 / 28TS-286TS 6 1 /2 1(0) (97) (08) 1 (1181) (11) 1(0) (97) (08) 2TS-26TS 12(0) 19(8) 12(0) 19(8) 182T 18T 2 21T 6 1 / /2 (7) () (7) () 21T /2 2 E 2T (6) (9) (6) (9) () TS 6 1 /2(1181) () 2TS /2 /2 () (11) () () 26TS (11) () 6TS /2 2 1 / /2 2 1 /2 6 6TS (6) (122) (19) (121) (622) (12) (6) (122) (19) (121) (622) (12) 2 G 21T-21T 6 1 /2 6 1 /2(1181) 2T-26T (1181) (6) (98) (8) (18) (6) (98) (8) (18) 28T 1 (11) (11) T-1T (0) (70) 9 (111) /2 AB 182T-18T 1(787) (28) (00) 1 (71) (879) (28) (76) (00) (76) 11 / 1 11 / (8) (119) (8) (119) 21T-21T (879) 6 1 /2(1181) 11(279) (76) (76) 2T-26T 9 (00) (2) 1 (11) 12(0) () (2) (71) 182T-18T 1(787) /2 1 (879) /2 (27) 21T-21T (879) (70) () (71) 9 (00) (27) (70) () (76) /2 BB 28TS-286TS 6 1 /2 1(0) 19 (02) 1(0) 19 (02) 2TS-26TS (1181) 12(0) (2) (12) 1 18 (76) 12(0) (2) (12) 18 (76) (98) (11) (98) 6TS 1 (11) 1(0) 19 (02) 1(0) 19 (02) AC 1T-1T 12(0) 28 (70) /(1) / T-18T 1 1(787) (71) (879) (28) (7) (00) (76) / (28) (00) (76) 21T (71) 9 (00) (7) /2(1181) 11(279) 17(2) () 2T-26T 6 1 /2 12(0) 1 / 18(7) 1 12(0) / () 18(7) () 28TS-286TS (1181) 1(0) () 19(8) (11) 1(0) 19(8) These dimensions are not to be used for installation purposes unless certified. psi (17 bar) available Maximum Working Pressure 17 psi (12 bar) 8

9 Series 1 Centrifugal Pumps cont. d STANDARD MECHANICAL SEAL STUFFING BOX CONSTRUCTION DIMENSIONS INCHES (MM) PUMP MODEL 1, 1-F PUMP MODEL 1-PF, 1-S PUMP SIZE SUCTION MOTOR FRAME DISCHARGE SIZE SIZE HA HB HD HL HO HP Y Z HA HB HD HL HO HP Y Z 182T-18T 1(787) 1 (879) 11 / T-21T (870) 11 / 18 1 (71) 9 (00) (27) (9) (6) (76) BC (71) (27) (9) (6) (76) 2T 9 (00) /2(1181) 12(0) 19 1 /2(9) 6 1 (121) () 28TS-286TS 6 1 /2 1(0) 1 / 1 /2(21) 1 1(0) / (121) () 1 /2(21) (122) 2TS-26TS (1181) 12(0) (122) 19 1 /2(9) (11) 12(0) 19 1 /2(9) 18T E 2 21T-21T 6 11 / / (7) 1 (170) 2 2T /2 (7) 1 (170) 2 1 /2 (6) (97) 26T 6 1 /2(1181) /2 7 (6) (97) 1 / 1 /2 7 / () (187) () (187) 26TS 1 (11) (1) (11) (1) 6TS-6TS /2 1 / /2 1 / TS (6) (122) (19) (12) (660) (12) (6) (122) (19) (12) (660) (12) 21T-21T 6 1 /2 6 1 /2(1181) 2T-26T (1181) 1 G 2 1 / /2 8 28T-286T 1 (6) () (97) (1) () 1 (6) () (97) (1) () (11) 2T (11) 1T T-18T 1 (787) / 18 1 (71) (879) / 18 1 (27) (1) (6) (76) 21T (71) (870) (27) (1) (6) (76) 9 (00) AC 21T 9 (00) / 6 1 /2(1181) / /2 (12) () (12) () 2T-26T 12(0) 19 1 /2(9) (0) (9) 7 / 6 28TS-286TS /2 1(0) / 1 1 /2(21) 1(0) (18) 1 /2(21) (1181) (18) (11) 2TS-26TS 12(0) 19 1 /2(9) 12(0) 19 1 /2(9) 21T-21T 1 (870) /2(1181) 2T (71) 9 (00) (2) (2) (27) (76) (6) (10) (9) (178) 26T 6 (11) 1 /2 BC 286TS (1181) 1 7 (178) 1 (6) (10) 22 (9) 2TS-26TS 1 (11) 6TS-6TS /2 2 1 /2 6 N/A 0TS (6) (122) (19) () (622) (12) 21T-21T / / 2T (7) (170) (7) (170) E T 6 1 /2(1181) 1 2 (6) (60) 28T-286T 1 / 9 / (6) (60) / 9 / 7 1 (1) (11) (18) (11) (1) (11) (18) 2TS-26TS (11) 6TS-6TS /2 1 / /2 1 / TS (6) (122) (19) (12) (667) (12) (6) (122) (19) (12) (667) (12) 21T-21T 6 1 /2 6 1 /2(1181) GB 2T-26T (1181) / / 28T-286T 1 (81) (17) (6) (12) (217) 1 (81) (17) (6) (12) (217) (11) 2T (11) 182T-18T 1 1(787) (879) T-21T (71) (870) (2) () (0) (76) (71) 9 (00) (2) () (0) (76) A 2T-26T 6 1 /2 1 / / TS-286TS (1181) /2 (18) (19) /2 (18) (19) 2TS-26TS 1 (6) (17) (72) (11) (6) (17) (72) 6TS (11) 21T-21T 9 / 6 1 /2(1181) 6 2T /2 (1) BC /2 6 7 / /2 (1181) 26T 6 (6) (12) (191) 7 / 1 () (6) (12) (191) 1 28T 1 (11) () 1 (81) (81) 6 2T-26T 6 1 /2(1181) (11) E 28T-286T 1 / 2 1 /2 7 / 7 1 / 7 / 2 1 /2 7 / 7 1 / (11) (68) (18) (2) (11) (68) (18) (2) 2T (11) 2T-26T G 28T-286T /2 7 / 29 1 / /2 7 / 29 1 / T-26T (6) (122) (19) (18) (79) (12) (12) (229) (6) (122) (19) (18) (79) (12) (12) (229) 6T-6T 2T-26T 6 1 /2(1181) 6 BC T-286T / / (81) (21) (68) (178) (2) (11) (81) (21) (68) (178) (2) 2T-26T (11) 2T-26T 6 E 28T-286T / / / / / /2 2T-26T (6) (122) (19) (12) (699) (12) () (2) (6) (122) (19) (12) (699) (12) () (2) 6T 8 L FRAME TO AND INCLUDING 12 1 /2" IMPELLER 26T 28T-286T 2T-26T / / /2 9 / / / /2 9 / (6) (122) (19) (19) (77) (12) () (27) (6) (122) (19) (19) (77) (12) () (27) 6 G * 6T-6T 0TS XL FRAME 12 " IMPELLER AND LARGER 6TS / /2 9 / / /2 9 / 0TS-0TS (660) () (2) () (787) (12) () (27) (660) () (2) () (787) (12) () (27) These dimensions are not to be used for installation purposes unless certified. psi (17 bar) available Maximum Working Pressure 17 psi (12 bar) *1 1 /2" impeller for RPM service with L frame. 8G ONLY STUFFING BOX CONSTRUCTION DIMENSIONS INCHES (MM) PUMP MODEL 1-S PUMP SIZE SUCTION MOTOR FRAME DISCHARGE SIZE SIZE HA HB HD HL HO HP Y 8G 28T-TS () (2) (711) (1778) (6) (11) (907) (2) (121) Flanges are: 12# ANSI - Standard DISCHARGE HA SUCTION HO HD HL HP Y HB HM 9

10 THE B&G End Suction Pump System Consists of: B&G Series 1 Pump B&G Triple Duty Valve B&G Suction Diffuser Triple Duty Valve Lowest Pressure Drop ASHRAE 90.1 Energy Efficient Design Three Valves in one! Nonslam drip-tight check valve Positive shutoff valve Calibrated system balance valve EPDM Disc Soft Seat Design Repack Under Pressure Brass Seat & Bronze Disc Stainless Steel Stem Multi-turn Valve (8-9 turns) vs 1 turn range of control Available connections Threaded Flanged Grooved ESP-Plus System Selection Suction Diffuser Full length stainless steel straightening vanes Oversize cylinder assures minimum strainer pressure drop Pressure gauge tap Magnetic drain plug to protect pump seals Adjustable support foot Space saving design reduces the footprint size of the unit Available connections Threaded Flanged Grooved Reducer and elbow provide multiple combinations of inlet and pump suction configurations which eliminate the need for reducer fittings ESP-Plus System Selection

11 Typical Specification for Series 1 Base Mounted, Flexible Coupled, End-Suction Pumps Furnish and install pumps with performance characteristics as shown on plans. Pumps shall be base mounted, single stage, end suction design with a foot mounted volute to allow removal and service of the entire rotating assembly without disturbing the pump piping, electrical motor connections or pump to motor alignment. Pump volute shall be Class 0 cast iron with integrally-cast pedestal support feet. The impeller shall be cast bronze enclosed type, balanced to ANSI/HI , section , figure 1.6, balance grade G6. and keyed to the shaft and secured by a locking capscrew. The liquid cavity shall be sealed off at the pump shaft by an internally-flushed mechanical seal with ceramic seal seat and carbon seal ring, suitable for continuous operation at 22 F (7 C). A replaceable bronze shaft sleeve shall completely cover the wetted area under the seal. Pump shall be rated for minimum of 17 psi (12 bar) working pressure. Volute shall have gauge tappings at the suction and discharge nozzles and vent and drain tappings at the top and bottom. The pump(s) vibration limits shall conform to Hydraulic Institute ANSI/HI , section for recommend acceptable unfiltered field vibration limits (as measured per HI , Figures 1.8) for pumps with rolling contact bearings. Baseplate shall be of structural steel or fabricated steel channel with fully enclosed sides and ends, and securely welded cross members. Grouting area shall be fully open. The combined pump and motor baseplate shall be sufficiently stiff as to limit the susceptibility of vibration. The minimum baseplate stiffness shall conform to ANSI/HI for Horizontal Baseplate Design standards. The seismic capability of the pump shall allow it to withstand a horizontal load of 0.g, excluding piping and/or fasteners used to anchor the pump to mounting pads or to the floor, without adversely affecting pump operation. A flexible type, center drop-out design coupler, capable of absorbing torsional vibration, shall be employed between the pump and motor. Pumps for variable speed application shall be provided with a suitable coupler sleeve. The coupling shall be shielded by a dual rated ANSI B1.1, Section 8 & OSHA compliant coupling guard and contain viewing windows for inspection of the coupling. Motor shall meet NEMA and EPACT 92 (where applicable) specifications and shall be of the size, voltage and enclosure called for on the plans. Pump and motor shall be factory aligned, and shall be realigned by the contractor per factory recommendations after installation. The pump(s) selected shall conform to ANSI/HI standards for Preferred Operating Region (POR) unless otherwise approved by the engineer. The pump NPSH shall conform to the ANSI/HI standards for Centrifugal and Vertical Pumps for NPSH Margin. Each pump shall be factory hydrostatically tested per Hydraulic Institute standards. It shall then be thoroughly cleaned and painted with at least one coat of high grade paint prior to shipment. The pump(s) shall be manufactured, assembled and tested in an ISO 9001 approved facility. Pumps shall be Series 1 as manufactured by ITT Bell & Gossett or equal. 11

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