Progressive Cavity Pump

PROGRESSIVE CAVITY PUMP

PART 1 GENERAL

1.01        SCOPE OF WORK

A. Furnish all labor, materials, equipment and incidentals required and install a two (2) horizontal, motor driven, progressive cavity pumps complete with variable frequency drives (VFDs) as shown on the Drawings and as specified herein.

1.02.       RELATED WORK

1.    Dewatering Centrifuge is included in Section 11363.

2.    Operating and Maintenance Data is included in Section 01730.

3.    Field painting is included in Section 09901.

1.03        SUBMITTALS

       A. Submit, in accordance with this Section, the following:

1. Certified shop and erection drawings showing all important details of construction, dimensions and anchor bolt locations.

2.    Descriptive literature, bulletins and/or catalogs of the equipment.

3.    Data on the characteristics and performance of the pump. The data shall include guaranteed performance curves, based on actual shop tests of like pumping units, which show that they meet the specified requirements for head, capacity and horsepower.

4.    Complete data on motors and operations on a Variable Frequency Drive.

5. Complete master wiring diagrams, elementary or control schematics, including coordination with other electrical control devices.

6.    The total weight of the equipment, including the weights of the larger components.

7.    A complete total bill of materials for all equipment.

8. A list of the manufacturer's recommended spare parts with the manufacturer's current price for each item.  Include gaskets, etc on the list.  List bearings by the bearing manufacturer's numbers only.

9.    Noise data.

10.  Complete description of surface preparation and shop prime painting.

B.    Operating and Maintenance Data

1. Operating and maintenance instructions shall be furnished to the Engineer as provided herein. The instructions shall be prepared specifically for this installation and shall include all cuts, drawings, equipment lists, descriptions, etc, that are required to instruct operating and maintenance personnel unfamiliar with such equipment.

2. A factory representative who has complete knowledge of proper operation and maintenance of the pump shall be provided to instruct representatives of the Owner on proper operation and maintenance. Provide training agenda and training materials and onsite training.

1.04        REFERENCE STANDARDS

A.    American National Standard Institute (ANSI)

B.    American Bearing Manufacturers Association (ABMA) 

C.    National Electrical Manufacturers Association (NEMA) 

D.    American Gear Manufacturers Association (AGMA)

E.    Occupational Safety and Health Administration (OSHA)

F. Where reference is made to one of the above standards, the revision in effect at the time of bid opening shall apply.

1.05        QUALITY ASSURANCE

A. Should equipment that differs from the specified requirements be offered and determined to be equal to that specified, such equipment shall be acceptable only on the basis that any revisions in the layout and construction of the structures, piping, electrical, and appurtenant equipment, required to accommodate such a substitution shall be made at no additional cost to the Owner.

B. Pump, drive unit and motor shall be furnished by the pump manufacturer and be factory-mounted on a common base plate of cast iron or fabricated steel.

1.06        SYSTEM DESCRIPTION

A.    The pumps to be provided under this section will be installed in the basement of the Aerobic Digester Building.

B.    Design Criteria

Quantity	2
Pump Use	Pump Aerobic Digested Sludge
Solids Concentration Range	2-5 percent
Design Capacity each (gpm)	150
Design Total Dynamic Head (ft)	200
Maximum PumpSpeed (rpm)	300
Minimum Motor Size (Hp)	20

1.07        MAINTENANCE

A.    Tools and Spare Parts

1. One set of all special tools required for normal operation and maintenance shall be provided.

2.    The following spare parts shall be provided:

a.   One set of packing for each pump. 

b.   One set of gaskets for each pump. 

c.   One rotor and one stator.

d.   One set of shaft universal joints.

3.    Special tools and spare parts shall be furnished in accordance with this Section.

1.08       WARRANTY

A. The progressive cavity pump, , motor and appurtenances, furnished shall be warranted to be free from defects in materials and workmanship for a period of 1 year after successful completion of testing for continuous operation on a Variable Frequency Drive. The warranty shall cover all repairs including parts and labor for all systems and all costs for removal, transportation and reinstallation. Said warranty shall conform to the requirements herein and shall be in a form acceptable to and be for the benefit of the Owner and shall be submitted by the manufacturer. Replacement of equipment caused by neglect or abusive operation shall be the responsibility of the Owner. If the equipment should fail during the warranty period due to a defective part(s),

the part(s) shall be replaced in the equipment and the unit(s) restored to service at no expense to the Owner.

PART 2 PRODUCTS

2.01 MANUFACTURERS 

      A.    Seepex.

B.    Netzsch. 

C.    Moyno.

D.    No other manufacturers shall be accepted.

2.02 MATERIALS AND EQUIPMENT 

    A.   General

1.    The equipment specified herein is intended to be pumping equipment of proven ability as manufactured by a reputable firm having experience in the production of such equipment. The equipment furnished shall be designed, constructed and installed in accordance with the best practices and methods and shall operate satisfactorily when installed as shown on the Drawings.

2.    All parts shall be so designed and proportioned as to have liberal strength and stiffness and to be especially adapted for the work to be done. Ample room and facilities shall be provided for inspection, repairs and adjustment.

3.    All necessary foundation bolts, plates, nuts and washers shall be furnished by the

equipment manufacturer and shall be of Type 316 stainless steel. Minimum foundation bolt diameter shall be 3/4-in.

4.    Brass or stainless steel nameplates giving the name of the manufacturer, the rated capacity, head, speed and any other pertinent data shall be attached to the pump.

5.    The manufacturer shall supply motor, belts and sheaves, guards all  factory mounted to a common base plate with the pump.

6.    The nameplate rating of the motor shall not be exceeded, nor shall the motor design service factor be reduced when its pump is operating at any point with the design conditions.

7. Pump and pump base shall have suitable provisions to collect seal leakage and permit it to be drained away.

B.    Pump

1.   Pump shall be heavy duty, positive displacement, single stage, progressive cavity type. 

      The pump body shall be of thick- walled cast iron and shall incorporate two inspection ports

180 degrees apart. The pump shall be cradle mounted to permit the suction port to be rotated to any angle perpendicular to the centerline of the pump. Suction and discharge connections shall be 6-in (max), 125 lb ANSI cast iron flanged. The discharge flange shall have a vent/gauge connection that can be rotated in 90º increments. The discharge support feet shall be separate from the discharge flange.

2.  The suction body of the pump shall be oversized at the entrance of the rotor and stator pumping elements to allow the free flow of high solids materials. The rotor joint head shall be set back from the stator and the leading edge of the stator shall be chamfered so not to restrict the flow into the pumping elements. If the pump does not incorporate the aforementioned features the use of a rag deflector shall be required.

3     The pump shall be supplied with adequate NPT connections for stuffing box drainage, pump drainage, flushing and gauge connections.

4.    The pump rotor shall be machined of high carbon tool steel, hardened to a Rockwell "C" value of 57 to 60 and covered with a heavy layer of hard chrome plate at least 0.01-in thick for abrasion resistance.

5.    The rotor shall rotate relative to a one-piece, Buna N stator of approximate 65 Durometer hardness (Shore A) chemically bonded to its steel tube housing. The stator shall be arranged to prevent the pumped material from contacting the bonding or the tube.

6.    The rotor shall be joined to the drive shaft by a carbon steel connecting rod and

crowned-gear type, grease-lubricated, sealed universal joints of chrome alloy tool steel of adequate design to transmit the required thrust and torque while allowing the rotor to move through is eccentric path. The gear joint seals shall be clamped at both outside and inside

diameters and recessed within heavy walled steel tubing to prevent damage by rags or other objects.

7.    To maximize universal joint and seal life, the connecting rod operating angle shall not exceed 1-1/4 degrees off center. To minimize the moment of the transmitted radial force on the bearings and to minimize overall pump length, the connecting rod shall telescope within a hollow drive shaft and shall be attached to the drive shaft in close proximity to the bearings.  This point of attachment shall not be more distant from the nearest bearing than the spacing between the two bearings. This method of drive shall minimize the shaft deflection in the stuffing box area.

8.    The drive shaft shall be mounted in two ball or tapered roller bearings. The ABMA minimum B-10 life expectancy of the bearings shall be in excess of 100,000 hours at the maximum operating conditions specified herein. Fittings shall be provided for grease lubrication of the bearings.

9.    The stuffing box shall be equipped with a ductile iron gland, split teflon lantern ring to permit repacking of the pump without removing the bearings or drive shaft components. Fittings shall be provided for grease lubrication of the packing.

C.    Motor

1.    Motor shall be horizontal, totally enclosed, fan cooled, foot mounted, NEMA Design B, of horsepower and speed as specified above.

2.  Provide a factory-installed winding temperature detector with leads terminating in the main conduit box. The winding temperature detector shall be normally open, bimetallic contacts, one per phase winding.

3.    The drive shall come complete with guards in conformance with OSHA. 

         D.    Base

1.    The motor, drive and pump shall be mounted to a common base of welded steel or cast iron. Provide grout holes for grouting to the concrete base.

2.02        SURFACE PREPARATION AND SHOP PRIME PAINTING

A. All surfaces shall be prepared and shop primed as part of the work under this Section. Surface preparation and shop priming shall be as specified in Section 09901.

PART 3 EXECUTION

3.01        INSTALLATION

A. Installation shall be in strict accordance with the manufacturer's instructions and recommendations in the locations shown on the Drawings. The pump assembly shall be installed under supervision of a representative of the manufacturer supplying the equipment. Installation shall include furnishing the required oil and grease for initial startup and one year’s operation. The grades of oil and grease shall be in accordance with the manufacturer's

recommendations and shall be acceptable for use in food packaging plants or NSF 61 approved. Anchor bolts shall be set in accordance with the manufacturer's recommendations.

3.02        INSPECTION AND TESTING

A. Furnish the services of a factory representative for a minimum of two days who has complete knowledge of proper operation and maintenance to inspect the final installation and supervise a test run of the equipment.

B. After the pump has been completely installed, the DESIGN/BUILDER, under the direction of the manufacturer's factory representative, shall conduct in the presence of the Engineer, such tests as are necessary to ensure that pump operation and performance conforms to the requirements specified. Supply all electric power necessary to complete the field tests. Pump shall be operated for at least 24 hours prior to test completion.

C. If the pump performance does not meet the specified requirements, corrective measures shall be taken, or pump shall be removed and replaced with pump which satisfies the conditions specified at no additional cost to the Owner.

END OF SECTION