SECTION 11328A CHEMICAL METERING PUMPS ALUM METERING PUMPS

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


SECTION 11328A

CHEMICAL METERING PUMPS ALUM METERING PUMPS


PART 1 GENERAL

1.1 WORK INCLUDED

A. Chemical Metering Pumps:
1. Alum Metering Pump No. 1: P-8-26-1.
2. Alum Metering Pump No. 2: P-8-26-2.
3. Alum Metering Pump No. 3: P-8-26-3.
4. Alum Metering Pump No. 4: P-8-26-4.

B. Major components included with, but not limited to:
1. Pump.
2. Drive Mechanism.
3. Accessories.
4. Controls.

1.2 SYSTEM DESCRIPTION

A. The chemical metering pumps shall transfer a chemical solution of liquid alum in metered quantities from the storage tank to the belt presses or the filtrate pump station.

1.3 DESIGN REQUIREMENTS

A. Liquid Handled: Liquid Alum.

B. Pump Type: Motor driven, reciprocating, mechanically actuated diaphragm pump.

C. Minimum Pump Capacity: 41.5 GPH.

D. Maximum Discharge Pressure: 145 psig.

E. Suction Lift: 1 foot maximum.

F. Operating Temperature: Ambient 40-90 °F.

1.4 SUBMITTALS

A. See General Pump Specification, Section 11328, CHEMICAL METERING PUMPS - GENERAL.

1.5 DELIVERY, STORAGE AND HANDLING

A. See General Pump Specification, Section 11328, CHEMICAL METERING PUMPS - GENERAL.

PART 2 PRODUCTS

2.1 ACCEPTABLE MANUFACTURERS

A. See General Pump Specification, Section 11328, CHEMICAL METERING PUMPS - GENERAL.

2.2 GENERAL

A. See General Pump Specification, Section 11328, CHEMICAL METERING PUMPS - GENERAL.

2.3 METAL FABRICATION

A. See General Pump Specification, Section 11328, CHEMICAL METERING PUMPS - GENERAL.

2.4 EQUIPMENT

A. Motor:
1. Furnish motor compatible with the driven equipment herein. Motors shall conform to the detailed requirements herein:
a. Motor nameplate horsepower: ¾ HP.
b. Type drive: Variable speed.
c. Nominal (synchronous) motor rpm: 1800 rpm.
d. Enclosure: TEFC
e. Power: 120 volt, single phase, 60 Hz.
f. The motor shall not be overloaded beyond the nameplate rating under any normal conditions encountered.

B. Pump:
1. Drive:
a. Type: Positive displacement, mechanically actuated diaphragm.
b. Exposed fasteners: Stainless steel.
c. Maximum strokes per minute (adjustable): 160 spm.
d. Stroke length adjustment: Manual 0 to 100% adjustment.
2. Liquid end materials of construction:
a. Head: PVDF or PP.
b. Diaphragm: PTFE.
c. Ball Check: Ceramic.
d. Ball Seat: PVDF or PP.
e. Gaskets: PTFE faced Viton.
3. Pump Accuracy: +/- 1%.

C. Maximum skid dimensions:
1. Depth, inches: 30
2. Width, inches: 30
3. Height, inches: 60

D. Pump Piping, Valve, and Accessory Package

1. See General Pump Specification, Section 11328, CHEMICAL METERING PUMPS - GENERAL.

2.5 INSTRUMENTATION AND CONTROL

A. See General Pump Specification, Section 11328, CHEMICAL METERING PUMPS - GENERAL.


PART 3 EXECUTION

3.1 INSTALLATION

A. See General Pump Specification, Section 11328, CHEMICAL METERING PUMPS - GENERAL.

3.2 MANUFACTURER'S SERVICES

A. See General Pump Specification, Section 11328, CHEMICAL METERING PUMPS - GENERAL.


END OF SECTION