SECTION 11316 SUBMERSIBLE PUMPS

This spec was part of the Des Plaines, IL River WRF project tat bid Feb 26, 2015.

SECTION 11316 SUBMERSIBLE PUMPS

PART 1 GENERAL

1.1 DESCRIPTION

A. Submersible Pumps:
1. Dryer Condensate Lift Station:
a. Dryer Condensate Lift Station Pump No. 1: P-11-15.
b. Dryer Condensate Lift Station Pump No. 2: P-11-16.
2. Major components included, but not limited to:
a. Pump and motor.
b. Mounting system.
c. Mix flush valve.
d. Wet Well and Valve Vault Access Covers.
e. Instrumentation and control.
f. Spare parts.

1.2 SYSTEM DESCRIPTION

A. The lift station pumps will pump dryer condensate and Dryer Buidling drains into the aeration tanks.

1.3 REFERENCES

A. Hydraulic Institute Standards.
1. ASTM A 108 - C41 - Specification for Steel, Carbon, Cold-Rolled Standard Quality.
2. ASTM A 48 - Gray Iron Castings.
3. AFBMA Std. 9 - Load Ratings and Fatigue Life for Ball Bearings.
4. AFMBA Std. 11 - Load Ratings and Fatigue Life for Roller Bearings.

1.4 DESIGN REQUIREMENTS

A. General Requirements:
1. Liquid pumped: Dryer Condensate.
2. Pump Installation: Submersible.
3. Specific gravity of liquid: 1.0.
4. Maximum liquid temperature (F): 100.
5. Percent solids (%): <0.5.
6. Discharge size (inch): 4-inch.
7. Suction size (inch): 4-inch.
8. Solids Handling: Minimum 3-inch soft solids.

B. Hydraulic Requirements:
1. Design flow, gpm: 400.
2. Design TDH, feet: 56.

3. Minimum shutoff head, feet: 83.
4. Minimum Pump Efficiency: 70%.
5. Minimum Overall Efficiency: 60%.

1.5 SUBMITTALS

A. Include all submersible pumps in a single submittal package. Partial or incomplete submittals will not be reviewed.

B. Shop drawings: Submit under provisions of Division 1, including the following:
1. Complete performance curves showing:
2. Capacity.
3. Head.
4. Horsepower.
5. Efficiency.
6. Pump data and dimensions.
7. Impeller type.
8. Motor data.

C. Submit operations and maintenance manual under the provisions of Division 1.

D. Submit certificates of proper installation and operator training under provisions of Division 1.

1.6 DELIVERY, STORAGE AND HANDLING

A. Deliver, store and handle the equipment under the provisions of Division 1.


PART 2 PRODUCTS

2.1 MANUFACTURER

A. Flygt Xylem, Pewaukee, WI.

B. Or Equal.

2.2 GENERAL

A. All equipment shall be the end product of one pump system manufacturer. The manufacturer shall be responsible for the complete system including all items covered herein and in the Detailed Specification Section.

2.3 METAL FABRICATION

A. Furnish metal parts described herein conforming details in the Drawings.

B. Anchor bolts, fasteners, nuts, and washers: 316 stainless steel.

2.4 EQUIPMENT

A. Motors:
1. Motor nameplate horsepower: 10 HP.
2. Type drive: Adjustable Speed.
3. Motor shall be inverter duty rated and meet NEMA MG1, Part 31.
4. Motor rpm: 1735 rpm.
5. 460 VAC, three phase, 60 Hz.
6. Moisture resistant Class H insulation.
7. Continuous duty, 30 starts per hour.
8. Enclosure: Submersible.
9. Rating: Class 1, Div. 1, Groups C & D.
10. Service Factor: 1.15.
11. The motor shall not be overloaded beyond the nameplate rating under any normal conditions encountered, throughout the entire pump performance range.
12. Temperature sensors embedded in motor windings (TSH-11-15, TSH-11-16).
13. Moisture sensors in stator chamber (MSH-11-15, MSH-11-16).
14. Motor shaft: AISI Type 431 Stainless Steel.

B. Electrical Power and Signal Cable:
1. Type: Water proof.
2. Power cord entry to pump: Protected with a compression fitting consisting of a single cylindrical elastomer grommet flanged with washers to provide ease of changing the cable.
3. Length (each): 60 feet.

C. Pump Construction:
1. Pump volute, motor and seal housings:
a. Construction: Close-grained cast iron ASTM A 48 Class 35B.
b. Seals: External mating parts machined and fitted with Nitrile or Viton rubber O-rings.
c. Exposed fasteners: AISI Type 316 stain-less steel.
2. Shaft:
a. Construction: AISI Type 431 Stainless Steel.
3. Shaft bearings:
a. Provide an upper and lower set of bearings that compensate for axial thrust and radial forces, AFBMA 9 and AFBMA 11.
b. Bearing life: B-10 life of 50,000 hours AFBMA 9 and AFMBA 11
c. Lubrication: Permanently grease lubricated.
4. Mechanical seal:
a. Number of seals: Two.
b. Type: Mechanical with tungsten carbide versus tungsten carbide seal faces for the lower primary seal, and tungsten carbide versus tungsten carbide for the upper secondary seal faces.
c. Mounting: Tandem with an oil chamber between seals.
d. Lubrication: Oil bath.
5. Impeller:
a. Construction: ASTM A532 (Alloy IIIA) 25% chrome cast iron RC 60.

b. Impeller type: Semi-open, multi-vane backswept design. Leading vane edges hardened to RC 45.
c. Balancing: Dynamically balanced.

D. Base Elbows and Mounting System:
1. Discharge elbow: 6-inch
a. Provide vertical discharge with 6-inch ANSI 125 pound flange.
b. Construction: Closed-grained cast iron ASTM A48 CL30.
c. Include guide rail lower mounting fitting.
2. Guide rails:
a. Number of guide rails per pump: 2.
b. Length, feet: See Drawings.
c. Construction: 2-inch stainless steel.
d. Provide a 40 foot stainless steel lifting cable for each pump. Provide stainless steel cable holders.
3. Include upper and intermediate guide rail supports for each pump.

2.5 ACCESSORIES

A. Mix Flush Valve:
1. Provide Flygt Mix-Flush Valve(s), or approved equal, for each pump.
2. Provide valve mounted directly on volute of one of the pumps for a duplex station and on two of the pumps for a triplex station.
3. Valve shall be positioned so as to provide non-clogging operation and discharge greater part of pumped volume into sump to flush solids into suspension at each pumping cycle.
4. Valve shall be open at start of each pump cycle and close under full pump discharge pressure.
5. Valve open time shall be adjustable.
6. Valve shall operate by liquid being pumped and through a self-contained hydraulic system. No external power source shall be required to operate valve.

B. Access Cover and Frame:
1. Furnish access covers compatible with the pumping equipment herein and the building sumps shown in the Contract Drawings. Access covers shall conform to the detailed requirements herein:
a. Designed loading: 300 pounds per square feet loading.
b. Indoor locations: Gas tight; bolted and gasketed.
c. Materials of Construction: Steel plate per Section 05500.

2.6 FINISHING

A. Shop and Field Painting: Conform to Section 09900, System No. 5. Verify compatibility of shop prime and field paint.

2.7 INSTRUMENTATION AND CONTROL

A. Pump Control Sensors:
1. Moisture Detectors: Provide in motor stator chamber.

a. Upon the moisture sensors sensing moisture in the stator chamber, the controls shall shut down the pump, indicate pump fail alarm, and activate the remote common fail.
2. Temperature Sensors: Provide thermal switches for each phase in pump motor.
a. Upon the temperature sensors sensing a high temperature in the motor stator, the controls shall shut down the pump, indicate pump fail alarm, and actuate the remote common fail. Automatically reset when temperature returns to normal.
3. Provide Flygt Mini CAS Relay with each pump to be mounted in Motor Control Center (MCC).
a. Other pump manufacturers to provide similar moisture and motor high temperature protection relay(s) to MCC supplier to provide separate moisture and high temperature signals.
4. Deliver the Mini CAS Relays to the Motor Control Center supplier for installation. Provide technical data to MCC supplier prior to MCC design submittal. Pump supplier shall coordinate electrical requirements with MCC supplier.


PART 3 EXECUTION

3.1 INSTALLATION

A. Install pumps in accordance with the Drawings, shop drawings and manufacturer's instructions.

B. Level bases and grout with non-shrinking grout.

3.2 MANUFACTURER'S SERVICES

A. Provide manufacturer's services under provisions of Section 01445.

B. Minimum Service Requirements:
1. Installation: As required for proper installation.
2. Start-up and Field Testing: One half day on site.
3. Operating Training: One half day on site.

C. Service to Repair Defective Work: Provide during one-year warranty period under the provisions of the General Conditions.


END OF SECTION