TechicalSpecsSection15806.pdf

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SECTION-15806

Hot and Cold Water Pumps

PART 1 - GENERAL

1.01 DESCRIPTION:

A. Furnish single-stage, four (4) hot water, ten (10) cold water and three (3) primary hot water heating supply centrifugal type, electrically driven pumps.

Pumps to be direct connected base mounted by means of a flexible- shaft coupling on a cast iron or steel subbase. Pumps of same size and performance to replace pumps at locations noted on Attachment A. Pump Motor recommended for service conditions by the manufacturer of the pump in compliance with attached section 15806 subpart 2.01

1.02 REFERENCE STANDARDS:

A. American Society for Testing Materials (ASTM)

1. A36: Specification for Structural Steel

B. American National Standards Institute (ANSI):

1. B3.15: Life of Ball Bearings

2. B3.16: Life for Roller Bearings.

C. The Anti Friction Bearing Manufacturers Association Inc. (AFBMA) Standards:

1. 9: Load Ratings and Fatigue Life for Rollers Bearings.

2. 11: Load Ratings and Fatigue Life for Ball Bearings

1.03 SUBMITTALS:

A. Submit the following after the bid award:

1. Shop drawings stamped and signed by a

Massachusetts Registered Professional Engineer.

2. Manufacturer’s literature to supplement data.

3. Operation and Maintenance Manual.

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4. Shop Manuals.

5. Bearing temperature range for the specified service conditions.

6. Recommended spare parts.

7. Recommendations for short and long term storage.

8. Shop testing procedures and testing equipment to be used.

9. Lead time for manufacture of pumps and delivery to Deer Island.

1.04 QUALITY ASSURANCE:

A. Pumps to be Manufacturer’s standard cataloged product.

B. Supplier to provide pumps from a single Manufacturer, as a complete package for compatibility of equipment.

1.05 GENERAL REQUIREMENTS:

A. Standard Products: Provide materials and equipment that are standard cataloged equipment.

1.06 DELEVERY, STORAGE AND HANDLING:

A. Shipping: to Deer Island Treatment Plant 190 Tafts Avenue, Winthrop, MA, CO

Mr. Ralph Bickford, Area Supervisor, Electrical/Piping

1. Ship equipment and material fully assembled except where partial disassembly is required by transportation regulations or for protection of components.

2. Pack and ship spare parts together with equipment and material.

PART 2 - PRODUCTS

2.01 MANUFACTURERS:

A. A list of Manufacturers appears below:

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1. Bell and Gosset Co., Morton Grove IL.

2. H. A. Thrush Co., Peru, IN.

3. Taco, Inc. , Cranston, RI

4. Or equal

B. Impeller:

1. Enclosed type, double suction, precision cast in one piece.

2. Material: Bronze ASTM B584 Alloy 836

3. Dynamically and statically balanced.

4. Secure to shaft with full length key.

C. Wearing Rings:

1. Casing and Impeller.

2. Material: Bronze ASTM B505 Alloy 932

D. Mechanical Seals:

1. Gland: Type 316 stainless steel

2. Rotary Holder: Type 316 stainless steel

3. Hardware: Type 316 stainless steel.

4. Springs: Hastelloy C.

5. Rotating Faces: Silicon Carbide.

6. Stationary Faces: Silicon Carbide

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E. Shafts:

1. Heat treated steel, machined along its entire length. Threads machined adjacent to the impeller will not be acceptable.

2. Material; Steel ASTM A322 Grade 4140

3. Shaft Deflection: 0.002 inches maximum measured at stuffing box for all conditions on pump performance curve.

4. Provide shaft with strength and rigidity with critical speed at least 25% in excess of actual operating speed.

5. Sleeves: Provide Bronze ASTM B505 Alloy 932 sleeves that position the impeller on the shaft.

F: Bearings

1. Provide single row antifriction ball bearings. Outboard to be thrust bearing and inboard to be radial type held by two bearing brackets.

Bearings to be grease lubricated

2. Provide bearings with minimum B-10 life rating of 100,000 hours based on latest AFBMA and ANSI Standards.

3. Bearings supported in bearing housings attached to pump casing and arranged to prevent water from entering. Bearings sealed to exclude moisture and dirt.

I. Coupling :

1. Coupling between pump and motor to be all metal, flexible coupling designed for both angular and parallel misalignment and free end float, fully housed, and provided with means of lubrication.

G. Pump Housing:

1. Housing: close grained cast iron.

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2.07 SHOP PAINTING:

A. Provide epoxy coating with primer to all exposed ferrous surfaces.

B. Provide a shop coating of grease or rust-resistant coating to ferrous surfaces not to be painted.

Part 3 – WARRANTY:

A. Furnish a Manufacturer’s warranty ensuring that the motors will be free from defects in design, materials and workmanship for a period of 12 months from delivery date.

PART 4 - EXECUTION: N/A

END OF SECTION