SECTION 11310
SUBMERSIBLE SEWAGE PUMPS
PART 1 GENERAL
1.01 WORK INCLUDED
A. Submersible pump equipment and accessories for Lift Station, SBR Basins,
Digester Basin, and Decant Sump.
1.02 RELATED WORK
A. Section 05500: Metal Fabrications
B. Section 11373: Equipment Control Center
1.03
C. Division 16: Electrical
REFERENCES
A. Hydraulic Institute Standards
B. National Electric Code Standards
C. Section 01340: Shop Drawings, Product Data, and Samples
D. Section 01600: Material and Equipment
1.04
E. Section 01730: Operating and Maintenance Data
SUBMITTALS
A. Product Data: Section 01340
B. Operation and Maintenance Manuals: Section 01730
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1.05 PROJECT SITE CONDITIONS
A. Elevation: See Schedule
2.
Inspect and verify that conditions are satisfactory before beginning work.
3.
Do not begin work until all unsatisfactory conditions are corrected.
1.06
4.
Beginning of work indicates acceptance of conditions.
WARRANTY
A. In printed form and apply to all similar units
B. Five years or 10,000 hours under municipal permanent installation policy to include parts and labor.
C. Manufacturer's authorized warranty repair station within 200 mile radius of installation; service station to have been appointed at least two years prior to start of this project.
PART 2 PRODUCTS
2.01 ACCEPTABLE MANUFACTURERS
A.
Pumps: Flygt Inc.
B. Accessories: Flygt Inc. or Halliday Products Inc.
2.02
C. All pumps specified in this section by same manufacturer
PERFORMANCE AND DESIGN REQUIREMENTS
A. See Schedule
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2.03 PUMP MATERIALS
A. Volute, Impeller, Motor Housing, Discharge Elbow, and Other: Gray cast iron
Class 30.
B. Shaft: Stainless steel ANSI 431 or CS 1034
C. Motor
1.
2.
Rotor bars and short circuit rings: Aluminum
Stator winding and lead insulation: Class F
D. Mechanical Seal
1.
2.
Lower: tungsten carbide.
Upper: tungsten carbide.
E. Wear Ring
1.
2.
Case wear ring: Steel with nitrite rubber molded
Impeller wear ring: ANSI 304 SS
F. Exposed Nuts and Bolts: 304 stainless steel
2.04 PUMP CONSTRUCTION
A. Water Tight Seatings: Nitrile rubber rings against machined surfaces
B. Cable Entry Design:
1. Seal: Torque-free mechanical compression type with strain relief
(epoxies, silicones or other secondary sealing not acceptable)
2. Junction chamber to be sealed from motor by terminal board and elastomer compression seal.
C. Pump Motor
1.
2.
Air filled, squirrel cage induction type, housed in air-filled watertight chamber
Stator to be dipped and baked three times in Class F varnish and heat shrink-fitted into the stator housing (designs requiring penetration of stator
3. housing are not allowed)
Equipped with winding over-temperature switch.
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D. Motor Cooling System Designed to Allow:
1.
Thermal radiators integrally cast into stator housing up to 10.5 HP
2. Circulation of pumped media through a cooling jacket
E. Pump Shaft
1. Rotate in two permanently lubricated ball bearings a. b.
Upper bearing to be single row deep groove ball bearing
Lower bearing to be a two-row angular contact ball bearing; shaft
2. to be completely isolated from pumped liquid
Sealed from pumped liquid
F. Minimum B10 Bearing Life: 20,000 hours at any point on head-capacity curve.
G. Mechanical Seals: Tandem independent and run in a standard motor oil reservoir.
H. Impeller: Dynamically balanced, double shrouded, non-clog, single vane capable of handling 3-inch diameter solids, unless otherwise scheduled.
I. Each pump to be equipped with submersible pump power cable of sufficient length to terminate at control panel unspliced.
J. Sliding guide bar bracket to be integral part of pump unit to guide on at least two rails. No portion of the pump or guidance system shall bear on sump floor.
2.05
K. Discharge pump/elbow connection seal to be metal to metal, diaphragm or o-ring type seals are not acceptable.
PUMP MOTOR PERFORMANCE
A. Non-overloading throughout pump curve.
B. Capable of fifteen evenly spaced starts per hour.
C. Capable of running dry indefinitely without damage.
D. Capable of continuous operation unsubmerged.
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2.06 PROTECTION COATING
A. Pump Exterior: Plasite 7122 epoxy phenolic - 12 to 15 mils dry film thickness.
2.07
B. Impeller: acrylic dispersion zinc phosphate primer.
ACCESSORIES
A. Pump installation accessories required for proper installation and/or recommended by manufacturer to be supplied by pump manufacturer (all components 304 stainless steel):
1.
2.
3.
4.
5.
Upper and intermediate guide bar brackets
Safety chain hook
Cable holder and support grips
Anchorage
Retrieval guide bars
B. Each submersible pump shall be furnished with a pump lifting-chain positive recovery system consisting of the following components.
1. Minimum of 30 feet of stainless steel wire, of diameter to provide tensile strength capacity to support length of chain sling, connected to a short length (approximately ten links long) of high tensile strength proof-tested stainless steel chain sling of required capacity, connected to the lifting eye or lifting bail of the submersible pump.
2.
A forged "grip-eye" of wrought alloy steel, provided separately to connect to the end of the lifting cable or chain of the pump lifting device.
C.
Furnish portable and adjustable pump hoist.
1.
Stainless steel construction.
2.
1000 pound lifting capacity.
3.
Provide stainless steel embed socket at installation points identified on plans.
4.
Minimum of 30 feet of stainless steel cable and safety hook.
5.
Dutton-Lainson hand winch assembly.
6.
Embed sockets for lifting points.
2.08 CONTROLS
A. Provided as integral part of Equipment Control Center.
B. Comply with Division 16.
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PART 3 EXECUTION
3.01 INSTALLATION
A. Manufacturer's recommendations.
B. Level, plumb, accurate alignment, leak-proof pump connection, easily removed without entering wet well as appropriate.
C. No splices allowed in cable.
3.02 FLOATS
A. Suspend as shown on the Drawings.
B. No splices allowed in cables.
C. Set to levels shown on the Drawings.
3.03 START-UP SERVICES
A. A factory trained service engineer to be present to check installation and operation.
B. A factory trained service engineer to provide a minimum of 4 hours per pump station of training to operating personnel on operation and maintenance of pumping equipment.
C. A report certifying that the equipment has been installed and is operating correctly is to be provided by the service engineer.
3.04
SPARE PARTS
A.
Provide the following spare parts to be delivered to the Owner:
1. One (1) Lift Station pump with the same design operation point shown in
Paragraph 3.05 Schedule. The spare lift station pump to be supplied from the same manufacturer and include spare cable of sufficient length to terminate at control panel unspliced.
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3.05 SCHEDULE
A. Lift Station Pumps:
1.
2.
Maximum shutoff head: 80 feet
Design operating point: 250 gpm @ 55’ TDH.
3. Flygt series NP-3127-484, impeller code 484 HT, 10 hp, 1,750 rpm, 3 phase, 230/460 VAC or Engineer-approved equivalent.
4. Number of submersible pumps: two.
B. SBR Sludge Pumps:
1.
2.
Maximum shutoff head: 30 feet.
Design operating point: 99 gpm @ 20’ TDH.
3. Flygt series DP-3067, impeller code 473 MT, 1.7 hp, 1,640 rpm, 3 phase,
230/460 VAC or Engineer-approved equivalent.
4. Number of submersible pumps: two.
5.
Provide pump housing 398 90 21 with blind flange for potential future installation of mix-flush system. Do not provide mix-flush valve.
C. Digester Sludge Pump:
1.
2.
Maximum shutoff head: 40 feet
Design operating point: 150 gpm @ 30’ TDH.
3. Flygt series NP-3085, impeller code 434 MT, 3.0 hp, 1,750 rpm, 3 phase,
230/460 VAC or Engineer-approved equivalent.
4. Number of submersible pumps: one.
5.
Provide pump housing 398 90 21 with blind flange for potential future installation of mix-flush system. Do not provide mix-flush valve.
D. Decant Sump Pump:
1. Maximum shutoff head: 30 feet
2.
3.
Design operating point: 99 gpm @ 20’ TDH.
Flygt series DP-3067, impeller code 473 MT, 1.7 hp, 1,750 rpm, 3 phase,
4.
230/460 VAC or Engineer-approved equivalent.
Number of submersible pumps: one.
5.
Provide pump housing 398 90 21 with blind flange for potential future installation of mix-flush system. Do not provide mix-flush valve.
E. Controller Components (Lift Station Pumps only):
1.
2.
3.
4.
230/460 volt, 3 phase, 4 wire
Two - 30 amp 3 pole Q frame pump C/B
Two - 10 horsepower FVNR mag starter w/ 3 overload elements
One - duplex logic chassis (24V power to float switches and an anodized aluminum sub-assembly) with Logic Panel including: a. Two - Hand-Off-Auto selector switches b. Two - Run pilot lights
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c. d. e. f. g. h. i.
24V Power On pilot light
Level Alarm pilot light
Alarm Silence push-button
Duplex Alternator
Lead Pump selector switch (1.2-Alt-2.1)
Provision for normally closed motor over-temperature contact connections from each pump motor
LED status indication pilot lights for each relay function
5.
6.
7.
8.
One - 15A/1P (control ckt)
One - 240 volt phase monitor relay
One - lightening surge arrester
Two - GFI convenience outlets
9. Two - elapsed time meters
10. One - motor overtemp lockout/reset (verify NC contact)
11.
One - alarm horn
12. One - alarm beacon
13. One - flasher
14. NEMA 4X Painted steel enclosure
15. Terminal Strip
F. Controller Components (Decant Sump Pump only):
1. 230/460 volt, 3 phase, 4 wire
2.
3.
4.
One - 20 amp 3 pole Q frame pump C/B
One – 3.0 horsepower FVNR mag starter w/ 3 overload elements
One - duplex logic chassis (24V power to float switches and an anodized aluminum sub-assembly) with Logic Panel including: a. One - Hand-Off-Auto selector switch b. c.
One - Run pilot light
24V Power On pilot light
5.
6.
7. d. e. f. g.
Level Alarm pilot light
Alarm Silence push-button
Provision for normally closed motor over-temperature contact connections from each pump motor
LED status indication pilot lights for each relay function
One - 15A/1P (control ckt)
One – 240 volt phase monitor relay
One - lightening surge arrester
8.
9.
One - GFI convenience outlet
One - elapsed time meter
10. One - motor overtemp lockout/reset (verify NC contact)
11.
One - alarm horn
12. One - alarm beacon
13. One - flasher
14. NEMA 4X Painted steel enclosure
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15. Terminal Strip
G. Provide one (1) Halliday D2B36B portable pump hoist and five (5) embed sockets.
H. Provide pump retrieval system accessories as identified in Section 2.07.A and B. for each pump.
END OF SECTION
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