Section 11215 CENTRIFUGAL BOOSTER PUMPS

Section 11215

CENTRIFUGAL BOOSTER PUMPS

PART 1 - GENERAL

1.1 THE REQUIREMENT

A. The CONTRACTOR shall furnish and install single stage, horizontal, end suction booster pumps with enclosed electric motors, controls and all appurtenant Work, complete and operable, in accordance with the requirements of the Contract Documents. Each Pumping Unit shall be rated for continuous duty in accordance with the operating conditions. Each unit shall be furnished with pump, motor, horizontal pump/motor baseplate with flexible coupling and guard.

1.2 RELATED WORK SPECIFIED ELSEWHERE

A. The requirements of the following sections and divisions apply to the Work of this section. Other sections and divisions of the Specifications, not referenced below, shall also apply to the extent required for proper performance of this Work.

1. Division 01, Additional General Requirements

2. Section 09800, Protective Coating

3. Section 11005, Equipment: Basic Requirements

4. Section 11210, Pumps, General

5. Section 16418, VFDs Below 100 hp

6. Section 16220, Electric Motors

7. Division 16, Electrical, applicable sections

8. Section 17300, Control Strategies

9. Section 17405, Process Instrumentation and Control

1.3 REFERENCE SPECIFICATIONS, CODES, AND STANDARDS

A. All Work specified herein shall conform to or exceed the applicable requirements of the referenced portions of the following publications to the extent that the provisions thereof are not in conflict with other provisions of these Specifications.

B. Comply with the applicable editions of the following codes, regulations and standards.

1. Industry Standards:

ASTM International (ASTM)

ASTM A 48 Standard Specification for Gray Iron Castings

C. Comply with the applicable reference Specifications as directed in the General

Requirements and the Additional General Requirements.

1.4 CONTRACTOR SUBMITTALS

A. Submittals shall be made in accordance with Section 11210, Pumps, General, and as specified herein.

1.5 QUALITY ASSURANCE A. General

1. Comply with the requirements specified herein and the applicable reference

Specifications of the General Requirements and Additional General Requirements.

2. Comply with applicable parts of Section 11005, Equipment: Basic Requirements, and Section 11210, Pumps, General.

1.6 WARRANTY

A. The pumps and all components specified in this Section shall be warranted by the manufacturer for a minimum one (1) year period after beneficial occupancy of the Work pursuant to “Use Prior to Final Completion” of the General Conditions, against defects in workmanship and materials.

PART 2 - PRODUCTS

2.1 PUMP NAME: 17BPMP410, 17BPMP420, 17BPMP430

A. General: Pumps shall conform to the following requirements:

1. Number of Pumping Units: 3

2. Location: Thickening Dewatering Building, Outdoors, North Side of Building

3. Operation: Intermittent and continuous

B. Operating Conditions:

1. Design Capacity (gpm): 1000

2. Total Dynamic Head (TDH-ft): 161 at a full speed and flow with a minimum pump efficiency of 80%.

3. Secondary Conditions at Reduced Speed: 600 gpm at 61 FT TDH at 1050 RPM,

750 gpm at 97 FT TDH at 1350 RPM

4. Minimum Shutoff Head (TDH-ft): 178

5. Maximum Suction Pressure (psi); 100

6. Minimum Suction Pressure (psi): 34

7. Liquid to be Pumped: Potable water

8. Max Pump Speed (rpm): 1800

9. Max Motor Size (horsepower): 60

10. Sphere Size Passable, Minimum (in): 1

11. Minimum Suction Size (inches): 6

12. Minimum Discharge Size (inches): 5

2.2 PUMP REQUIREMENTS

A. Construction: Construction of pumps shall conform to the following requirements:

1. All major pump parts shall be made of cast iron conforming to ASTM A 48, Class 30 or better. The casing assembly and drive connection shall permit the removal of the rotating element without disconnecting the piping. Casing parts shall have registered fit to maintain alignment. The nozzle flanges shall be flat faced, with ANSI/ASME B16.1, Class 125 diameter and drilling. Pipe-tapped openings shall be provided for draining, priming, and venting the casing. Cast iron casings shall be provided with plugged gauge cock connections on the suction and discharge nozzles. The pump shall contain no points of critical clearance nor require periodic adjustment or replacement to maintain reasonable pumping efficiency. All waterway passageways shall be free from hollows, pinholes, cracks, fins, and projections that might cause cavitation.

2. Impeller: The impeller shall be a one-piece casting. The impeller shall be completely machined on all exterior surfaces, except when high chrome alloy material is specified. The interior water passages shall have uniform sections and smooth surfaces and shall be free from cracks and porosity. The impeller shall be securely locked to the shaft so that it will not be loosened by reverse rotation, but shall be easily removable. The impeller shall be of the enclosed type, statically and hydraulically balanced, and keyed to the pump shaft.

3. Bearings: Regreasable lubricated ball bearing type. Bearings shall have an ABMA L10 Life Rating of 40,000 hours at specified operating conditions. The pump shaft speed shall not exceed the limits specified by the bearing manufacturer.

4. Shaft: Steel, AISI 1045.

5. Seal: Mechanical seal, single or double, internally cooled.

6. Wear Ring: Bronze (ASTM-B584-932).

7. Hardware: All exposed nuts, bolts, and miscellaneous hardware shall be Type

316 stainless steel if available as a manufacturer’s standard option. Otherwise manufacturer’s standard shall be supplied.

8. Mounting Method: Support foot casing supports.

9. Pump Connection: Flanged with dimensions conforming to ANSI B16.1, Class

125.

B. Drive: Each pump shall be driven by a TEFC motor through a flexible coupling. The motor shall be suitable for use with a variable frequency drive and meet the requirements of Section 16220, Electric Motors. The motor shall be furnished by the pump manufacturer and be coordinated with the requirements of the VFD, and pump, sized to be non over loading during operation at any point on the pump curve. The flexible coupling shall have a horsepower rating 1.25 times the motor nameplate horsepower when the misalignment is within the manufacturer's tolerance limit. Coupling design shall permit removal of the pump rotating element without disconnecting the piping, moving the drive unit, or axial movement of the coupling halves on the shaft. When the pump is installed in a classified area, it shall be approved and labeled for such area. Refer to the Drawings for area classification information.

C. Control: The Instrumentation and controls shall be provided as indicated on the P&IDs, elementary diagrams (control schematics) and shall be in accordance with Divisions 16, Electrical, and 17, Instrumentation and Control, of the Specifications. The design Drawings shall be modified to support the selected over temperature switch configuration used by the manufacturer for the motor.

D. Painting: Pumps and motors shall be painted according to Section 09800, Protective

Coating, of these Specifications.

2.3 MANUFACTURERS

A. The manufacturer shall be one of the following, Or Equal:

1. Bell and Gosset.

2. Taco.

3. Aurora.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Pumping equipment shall be installed in accordance with approved procedures submitted with the shop drawings and as shown, unless otherwise accepted by the ENGINEER.

B. General installation requirements shall be as specified for "Execution" in Section

11210, Pumps, General.

3.2 TESTING

A. The electrical system shall be tested in accordance with Section 16080, Electrical

Testing.

3.3 MAINTENANCE OF INSTALLED EQUIPMENT

A. Maintain the operability and functionality of all installed equipment between the time of installation and the commissioning period. See Specification section 01660 for requirements.

3.4 MANUFACTURER’S FIELD SERVICES

A. Furnish the services of authorized technical representatives of the Manufacturer to assist/inspect the installed equipment and to certify that the equipment has been properly installed and is ready to operate, train OCSD personnel, conduct pre-operational mechanical checkout of the equipment, place equipment into operation, optimize the performances of the equipment and perform the field performance testing.

B. At a minimum, conduct three separate site visits as follows:

1. Inspection of equipment installation (8 hours minimum)

2. Training of OCSD Personnel: See Specification section 01820, Training of

OCSD Personnel, for requirements.

3. Commissioning. See Specification section 01810, Commissioning, for requirements. Number of hours shall be as required to meet all testing and commissioning requirements, but shall not be less than 8 hours.