PROGRESSING CAVITY PUMPS

Here is another progressing cavity pump spec from the same project as the spec in the last post. If this isn't the type of pump you are looking for try this pump: "Dominator Wastewater and Sewage Pump - 9S Series"

PROGRESSING CAVITY PUMPS

PART 1   GENERAL

1.1      DESCRIPTION OF WORK

A.   The Work of this section includes all labor, materials, tools and equipment necessary to furnish and install progressive cavity pumps specifically designed to convey primary sludge  (3-4 percent solids concentrations), Waste Activated Sludge (WAS) and Trickling Filter Sludge (3 percent solids concentrations), centrifuge thickened sludge (4-6.5 percent solids concentrations) and digested sludge (3-4 percent solids concentrations), active and dilute polymer as specified herein and shown on the Drawings.

1.2      DESIGN CRITERIA

A.   The  materials  and  equipment covered  by  this  Specification are  intended  to  be standard materials and equipment of proven ability as manufactured by reputable companies.  Equipment shall be designed and constructed in accordance with the best practice of the industry and shall be installed in accordance with the manufacturer's recommendations and  the  Contract  Documents. The  Specifications call  attention  to certain features but do not purport to cover all details entering into the construction of the equipment.   All Work  shall conform  to  the  requirements of  Section 11210,  Pumps, General.

1.3      RELATED SECTIONS

A.   The requirements of the following sections and divisions apply to the Work of this section.  Other sections and divisions of the Specifications, not referenced below, shall also apply to the extent required for proper performance of this Work.

1.   Additional General Requirements

2.   Operation and Maintenance Manuals

3.   Commissioning

4.   Training of OCSD Personnel

5.   Protective Coating

6.   Pumps and Equipment, General

7.   Electric Motors

8.   Variable Frequency Drives Below 100 HP

9.   Variable Frequency Drives 100 HP and Above

10. Electrical, applicable sections

11. Process Instrumentation and Control

1.4      REFERENCES

A.   XXXXXXXXXX

1.5      SUBMITTALS

A.   The CONTRACTOR shall submit complete shop drawings for acceptance in accordance with Shop Drawing Submittals of the General Requirements and as specified herein.

B.   In addition to the submittal requirements of Section 11210, Pumps, General, the following shall be submitted:

1.   Shop drawings showing complete fabrication and construction details, materials, weights, dimensions, clearances, anchorage locations and bolt detail, piping and utility requirements, and step-by-step sequence of controls.

2.   Pump manufacturer, type and model, rpm  at design point condition, size of suction and discharge flanges, and maximum bhp requirement at maximum differential pressure condition.

3.   Certified Pump Curves showing maximum and minimum speeds.

4.   For pump control panels, complete master wiring diagrams, elementary or control schematics, including required coordination with other electrical control devices operating in conjunction with the pumping system and acceptable outline Drawings shall be furnished for acceptance before proceeding with manufacture.  Due to the complexity of the control functions, it is imperative the above Drawings be clear and carefully prepared to  facilitate interconnections with  other  equipment.   Standard preprinted sheets or Drawings simply marked to indicate applicability to this Contract will not be acceptable.

5.   Coordination letter stating that the pump manufacturer has coordinated with the manufacturer of the Variable Frequency Drives specified in Specification section 16418,  Variable  Frequency Drives  below  100  Horsepower and  16419,  Variable Frequency Drives 100 Horsepower and Above for complete compatibility.

6.   Bearing Life Calculations.

7.   Operation and Maintenance Manuals.

1.6      DELIVERY, STORAGE, AND HANDLING

A.   All materials and equipment shall be shipped, stored, handled and installed in such a manner as not to degrade quality, serviceability or appearance.  The equipment shall be stored in a clean, dry location free from construction dust, precipitation and excess moisture. If stored for more than two weeks, the equipment shall receive all maintenance considerations required by the manufacturer for proper storage of the equipment.

1.7      DESIGN CONDITIONS

A.   The design conditions and other pertinent requirements for the progressive cavity pumps are listed in Table 1, at the end of this section.   The pumps shall be as manufactured by Moyno Inc., Springfield, OH, Seepex Inc., Enon, OH, or NETZSCH Pumps North America, LLC, Or Equal.

B.   All chemical feed pumps shall be manufactured by a single manufacturer.

C.  All sludge pumps shall be manufactured by a single manufacturer.

D.  Different manufacturers may provide the sets of chemical feed and sludge pumps.

E.   Pumps shall be designed to operate continuously.

1.8      WARRANTY

A.   The pumping units shall be warranted by the manufacturer for a minimum three (3) year period after Beneficial Occupancy of the Work pursuant to “Use Prior to Final Completion” of the General Conditions, against defects in workmanship and materials. Wear items such as seals, bearings, impellers, motor rotors and stators may be prorated during the three year period.

1.9      SPECIAL TOOLS

A.   If required for pump operation and maintenance, two sets of special tools required for pump operation and maintenance shall be provided at the time of pump deliver.

PART 2   PRODUCTS

2.1      PROGRESSIVE CAVITY PUMPS

A.   Pumps  shall  conform  to  applicable  provisions  listed  in  Section  11210,  Pumps, General.

B.   The pumps shall be horizontal, heavy duty, positive displacement, progressive cavity pumps. The pump and drive shall be direct coupled and mounted as shown on the Drawings.

1.   Pump Casing:

a.   The casing shall be close-grained cast iron of sufficient strength, weight and metal thickness to insure long life, accurate alignment and reliable operation. The  volute  shall  be  a  symmetrical  waterway  to  provide  an  unobstructed discharge flow.  Two inspection ports with removable covers having its interior surfaces matching the volute contour shall be provided located 180 degrees apart on the casing housing.  The pump shall be mounted to permit the suction port to be rotated in 90 degree increments perpendicular to the centerline of the pump.   Pump shall be supplied with adequate number of connections for seal water flushing, stuffing box drainage, pump drainage and gauge connections.

2.   Casing Connections:

a.   Suction  and  discharge  connections  shall  be  ANSI  125  pound  flat  face flanges. Suction and discharge flanges shall be provided with 1/2 inch NPT drilled and tapped holes with threaded plugs.

3.   Rotor and Drive Train:

a.   The pump rotor shall be machined from chrome-plated tool steel with a minimum chromium content of 11-13.5 percent, air hardened to a Rockwell "C" hardness of 57 to 60 and covered with a minimum 0.01 inch thick layer of hard chrome plating for abrasion resistance.   The rotor shall be joined to the drive shaft by a connecting rod and crown gear type oil or grease-lubricated, single sealed universal joints of adequate design to transmit the required thrust and torque while allowing the rotor to move through its required eccentric path without distortion or vibration.  The universal joint shall be sealed by a Buna-n bellows clamped positively at both the I.D. and O.D. and protected on the outer diameter from damage by foreign materials by a thick walled steel casing on the rotor end and the shaft end.

b.   Rotor for polymer pumps XXXXX shall be polished 316 stainless steel and shall have no surface coating.

4.   Stator:

a.   The  rotor  shall  rotate  within  a  Buna-n  rubber  stator  of  approximate 70 Durometer hardness (Shore A) chemically bonded to high strength steel tube. The stator shall be attached to the suction housing by four thru-bolts for ease of assembly and disassembly.   The stator end shall be sealed or gasketed to prevent the material being pumped from contacting the stator bonding and tube.

b.   Stator for polymer pumps XXXXXX shall be Fluoroelastomer (FPM) material.

5.   Shaft:

a.   The drive shaft shall be mounted in two bearings.   The connecting rod operating angle shall not exceed 1 degree off-center (2 degree total operating angle).  Driveshaft where it passes through the stuffing box shall be hard chrome plated. Designs which rely on the gear reducer for radial and axial thrust of the pump are not acceptable except on polymer service. Bearings must be held in place with solid metal shoulders. Snap ring designs are not acceptable, except on polymer service.

b.   Shaft for polymer pumps (XXXXX) shall be 316 stainless steel.

6.   Bearings:

a.   The shaft shall be mounted in two ball bearings or two tapered roller bearings designed for all radial and thrust loads encountered in the service conditions. The bearings shall be pre-lubricated and fully sealed and shall have a minimum B-10 life of 100,000 hours. Manufacturer shall submit proof that bearings meet this requirement.

b.   Bearings  for  polymer  pumps  (XXXX) shall be 316 stainless steel.

7.   Stuffing Box:

a.   Stuffing box shall be provided with tapped connection for seal liquid. The stuffing box shall be sealed with a split mechanical seal per Section 11210, Pumps and Equipment, General.  Stuffing box shall be sealed with a source of water external from the pump.   A 3/4 inch drain in the stuffing box shall be provided.

b.   All wetted components including seals metal parts for the polymer pumps (XXXXXX) shall be 316 stainless steel.

8.   Baseplate:

a.   Each pump and drive unit shall be mounted on a common baseplate of neat design, with rounded corners.  All exposed seams and contact surfaces of steel plates and shapes shall be continuously welded and ground smooth.   Pipe tapped openings shall be provided to ensure positive drainage from the base. At least one drain opening shall be provided for each base.  A ½ inch NPT drain connection shall be provided to convey leakage to the nearest floor drain.

b.   Openings shall be provided in the top of the base to facilitate grouting.  An opening shall also be provided, if necessary, for electrical conduit to the drive unit.

9.   Anchor Bolts

a.   Anchor bolts shall be accurately located and centered in pipe sleeves having an inside diameter and length as shown on the Standard Drawings.

b.   Anchor bolts for the polymer pumps (XXXXXX) shall be 316 stainless steel.

2.2      MOTORS AND DRIVES

A.   Motors shall conform to the requirements listed in Table 1.  All motors shall be TEFC, with a  Class 1,  Division 2 rating, suitable for  wet and corrosive environments, and conform  to  the  requirements  specified  in  Section  16220,  Electric  Motors.  Motor orientation shall be as shown on the Drawings.

B.   Motor nameplate horsepower shall be the maximum noted in Table 1 except that the pump motor shall not be overloaded nor operate within the service factor at any point on the published pump curve up to the maximum pump speed and the pressures noted in Table 1.

C.  Selection of the motor bearing sizes shall be based on a B-10 life of 100,000 hours.

D.  Motors shall be driven by constant torque VFD’s and shall be inverter duty rated, compatible with the variable frequency drive controllers specified under Section 16418 and  16419.    Each motor shall be  of  adequate power for  starting and  continuously operating its respective pumping unit under all specified load conditions without overloading. .

E.   The drive unit shall operate the pump at the speed noted in Table 1.

F.   The pumps shall be suitable for Class 1, Division 2 and wet and corrosive area installation.

2.3      ACCESSORIES

A.   Each pump shall be equipped with suction vacuum switch and discharge pressure switch to protect against a closed suction or discharge valve situation. Switches shall be mounted on stainless steel annular pressure sensors mounted off-line with isolation ball valves mounted above, and below the pressure sensor ring to allow removal of the unit, or facilitate sampling. They shall be wired under Division 16, Electrical.

B    Each pump shall be supplied with a three (3) inch minimum diameter pressure relief valve with an integral limit switch. The pressure relief valve shall be constructed with a cast iron body and ductile iron cover, to withstand severe shock conditions. The body shape shall be 90° angle pattern to permit side or downward discharge. The cover shall provide an air gap between the surge valve and the hydraulic cylinder. The valve stem shall  be  connected to  the  hydraulic cylinder  by  means  of  a  self  aligning universal connector to provide smooth positive opening, without binding.  The hydraulic cylinder shall be removable from the valve without dismantling or removing the valve from the line. The closing speed shall be externally adjustable by means of a coded micrometer control valve. The valve disc shall be normally closed against the system operating pressure by means of a spring or springs. When the system pressure exceeds the factory setting of 90 psig the surge relief valve shall open immediately to relieve the pressure surge and close slowly as the system pressure returns to normal. The hydraulic cylinder shall be capped on both ends (totally enclosed) to prevent dirt or dust from fouling up the cylinder operation. It shall be fitted with an atmospheric oil reservoir. The relief pressure shall be set at the factory. The valve shall be field adjustable by increasing or decreasing the tension on the externally adjustable springs. The surge relief valve shall be constructed of the following materials:

1.   Body shall be Cast Iron ASTM A126 Grade B

2.   Body Seat Ring shall be Aluminum Bronze ASTM B148

3.   Cover shall be Ductile Iron ASTM A536

4.   Disc Seat shall be Buna-N

5.   Disc shall be Steel ASTM A36

C.  Each polymer pump (XXXX) shall be supplied with 1 1/2-inch diameter pressure relief valve. Valve body, top, spring and all wetted components shall be 316 stainless steel. Diaphragm shall be Teflon/Viton or 316 stainless steel disc. Seals and/or O-rings shall be Teflon or Teflon encapsulated Viton. Valve shall be adjustable in the range of 10 to 250 pounds per inch. Valve shall be rated for pressure of 400 pounds per inch. Valve shall have flanged connections. Pressure relief valve shall be manufactured by, Or Equal:

1.   Tyco/Kunkle Valve Model 171S

2.   Griffco Valve, Model G-Series

D.  The couplings shall be effectively covered by means of protective metal guards, conforming to OSHA standards.

E.   The pump, motor, speed reducer and couplings shall all be accurately aligned and mounted on a fabricated structural steel base.

F.   A seal water system shall be provided for each pump as shown on the Drawings.

G.  Provide rotor locking to prevent reverse rotation.

PART 3   EXECUTION

3.1      INSTALLATION

A.   All materials and equipment shall be installed in a neat, workmanlike manner.

B.   All wiring of the equipment shall be as specified under Division 16, Electrical, of these Specifications.

C.  All   equipment   specified   herein   shall   be   installed   in   accordance   with   the manufacturer's recommendations and the Drawings.

D.  Where anchor bolts and other parts to be embedded in concrete are required, such parts shall be furnished to the site in advance of the equipment along with templates and instructions for their installation.

E.   Such installation shall be done under Division 3, Concrete.

3.2      PAINTING

A.   Shop painting and the surface preparation is a part of the Work specified in this section and shall be as specified in Section 09800, Protective Coatings.  Stainless steel shall not be painted.

3.3      CLEAN-UP

A.   Prior to start-up and field testing, all foreign matter shall be removed from the pumps, interconnecting piping, and spillage of lubricants used in servicing the equipment shall be cleaned from pumps, piping and concrete surfaces.

3.4      LUBRICATION REQUIREMENTS

A.   All lubricants required for the first year of operation shall be provided for the system.

3.5      MAINTENANCE OF INSTALLED EQUIPMENT

A.   Maintain the operability and functionality of all installed equipment between the time of  installation  and  the  commissioning  period.    See  Specification section  01660  for requirements.

3.6      MANUFACTURER’S FIELD SERVICES

A.   Furnish the services of authorized technical representatives of the Manufacturer to assist/inspect the installed equipment and to certify that the equipment has been properly installed and is ready to operate, train OCSD personnel, conduct pre-operational mechanical checkout of the equipment, place equipment into operation, optimize the performances of the equipment and perform the field performance testing.

B.   Conduct multiple separate site visits as follows:

1.   Inspection of equipment installation – four trips

a.   Trickling Filter Sludge Pumps – two trips (4 hours minimum, each)

b.   Polymer Pumps (8 hours minimum)

c.   Centrifuge Feed Pumps (8 hours minimum)

2.   Training of OCSD Personnel. See Specification section XXXX for requirements.

3.   Commissioning.  See Specification section XXXXX for requirements.  Number of trips and hours shall be as required to meet all testing and commissioning requirements, but shall not be less than 60 hours.

3.7      SPARE PARTS

A.   Spare parts shall be provided for the equipment furnished as outlined in Table 1.

3.8      PUMP TESTS

A.   Pump tests shall be performed for all equipment supplied under this section.


B.   Manufacturers’ field services shall be as specified in Section 01810, Commissioning.

C.  Manufacturers’ training of OCSD personnel shall be as specified in Section 01820, Training of OCSD Personnel. D.  The following spare parts shall be furnished, one set for each system:
1.   Rotor

2.   Stator

3.   Shaft sleeve



SEE FOLLOWING TABLE 1

TABLE 1
SPECIFIC CONDITIONS AND REQUIREMENTS PROGRESSING CAVITY PUMPS

A.   Design Conditions:


Tag #: PMP110, 210, 310

System: Thickening Centrifuge Feed Pump

Location: Centrifuge Building Basement

Fluid Conveyed: 0.5-3.5 percent WAS/Primary Sludge

Design Flow Condition (gpm): 1600

Design Pressure (psig): 70

Suction Diameter (inch): 12

Discharge Diameter (inch): 12

Maximum Pump Speed (rpm): 300

Motor (hp): 125

Type of Seal: Single Seal

Mfg No./ Or Equal: Chesterton 442 Split Seal w/ Flushing

Motor Voltage & Drive Type:  480 V, 3 PH, 60 HZ, Class 1, Division 2 motor with VFD

Diaphragm Metering Pumps

PUMPING EQUIPMENT: DIAPHRAGM METERING PUMPS

PART 1 - GENERAL

1.1      SUMMARY

A.   The CONTRACTOR shall furnish and install chemical feed diaphragm pumps and necessary appurtenances as shown on the Drawings and specified herein, including speed and stroke controls, calibration cylinders, back pressure valves and pulsation dampeners for complete operation.

1.2      RELATED SECTIONS

A.   The Work  of  the  following Section applies to  the  Work  of  this  Section.    Other Sections, not referenced below, shall also apply to the extent required for proper performance of this Work.

1.3      CONTRACTOR SUBMITTALS

A.   Shop  Drawings:     The  CONTRACTOR  shall  submit  shop  drawings  showing fabrication, assembly, foundation, and installation details, along with detailed specifications   and   data   covering   materials   of   construction,   devices,   and   other accessories forming a part of the equipment.  The shop drawings shall be provided in accordance with this Section and the requirements of Section 11005, Equipment:  Basic Requirements, and Section 11210, Pumps, General.

B.   Documentation:  The CONTRACTOR shall submit documentation that all equipment and piping is compatible with chemical in service.

C.  Diaphragm Metering Pumps:  For diaphragm metering pumps, the CONTRACTOR shall submit capacity, discharge pressure, HP and data on assembly, anchor bolts, and mounting.   The CONTRACTOR shall provide data on variable speed drives that shall include catalogue cuts on all drive equipment, controls, accessories, and wiring requirements.

D.  Motors:   For motor driven equipment, the CONTRACTOR shall submit motor data meeting the requirements of Section 16220, Electric Motors.

E.   Instrumentation:  For instrumentation associated with chemical feed equipment, the
CONTRACTOR shall submit catalogue cuts, wiring diagrams, and equipment data.

F.   Instructions:    The  CONTRACTOR shall  provide  field  assembly,  installation  and operation and maintenance instructions in conformance with Section 11005, Equipment: Basic Requirements.

1.4      QUALITY ASSURANCE

A.   All equipment furnished shall be new and of best quality entirely suitable for the purpose intended.

1.5      WARRANTY

A.   The metering pump drive train, including gear reducer, transmission, hydraulic make- up system, and housing and all components specified in this Section shall be warranted by the manufacturer for a minimum five (5) year period after beneficial occupancy of the Work pursuant to “Use Prior to Final Completion” of the General Conditions, against defects in workmanship and materials.    Other components shall have a one (1) year warranty period after beneficial occupancy.

PART 2 - PRODUCTS

2.1      DIAPHRAGM METERING PUMPS

A.   General:  The metering pumps shall be hydraulically balanced diaphragm type with non-loss motion drive. The drive motor shall actuate a flat, Teflon diaphragm. The liquid ends shall provide for easy maintenance. The feed pumps shall be capable of feeding the indicated fluid of service from the corresponding storage tank to the injection point as shown on the Drawings.

B.   Pump Features:
1.   Pumps shall accept readily available "off-the-shelf" NEMA 56C flange motor in accordance with requirements of Section 11005, Equipment: Basic Requirements.
2.   Capacity adjustment shall be 0 to 100 percent by calibrated external stroke adjustment accurate to  approximately 1  percent  which shall show stroke length setting.
3.   Valves shall be flange-mounted or union coupled to permit easy access for cleaning and  service so  that  piping  does  not  have  to  be  disconnected.   Valve chambers shall be such that individual components can be replaced rather than entire assemblies.
4.   Pumps shall have a manual stroke adjustment from 0 to 100 percent that can be accomplished while idle or operating. An auto-lock for the manual stroke adjustment shall be provided.
5.   The drive mechanism and gearing shall be of hardened and ground steel and bronze. Gear box shall be water resistant. Plastic gear boxes will not be acceptable.
6.   Pumps shall be able to operate dry indefinitely without damage.
7.   All pumps, fittings, gear boxes, etc. shall be chemical and corrosion resistant.
8.   A relief valve shall be provided, which, in the event of discharge line stoppage, shall recycle hydraulic fluid back to the reservoir.
9.   At a constant motor speed, the metering pumps shall feed within plus or minus 1 percent of the set rate throughout a 10:1 feed range. The repeatability of the set point shall be within plus or minus 1 percent of actual.
10. Pulsation dampeners shall be provided.
11. Pump head shall have gravity seated ball-type check valves on the inlet and outlet sides. Valve ball shall be ceramic with PTFE seats. Spring loaded check valves are not acceptable. Valves and seat shall be individually replaceable and sealed with PTFE O-ring or flat gasket.

C.  Pump Quality:   All pumping equipment furnished under this Section including the variable speed drives shall be of a design and manufacture of:
1.   MilRoyal by Milton Roy.
2.   Pulsar by Pulsafeeder.
3.   Or Equal.

D.  Sodium Hypochlorite Feed Pump

1.   Design Conditions:

a.   Tag  Numbers:    XXXXX
b.   Capacity (gallons/hour): 12
c.   Minimum Flowrate (gallons/hour): 4
d.   Operating Backpressure (pounds per inch): 50
e.   Maximum Backpressure (pounds per inch): 150 f.    Fluid: Sodium Hypochlorite 12.5 percent
g.   Wetted Parts: PVDF
h.   Diaphragm: PTFE
i.    Inlet/Outlet Size NPT: 1 inch ID

2.   Pump Requirements:

a.   Pump shall be equipped with auto-degassing device to prevent gas locking the pump. Degassing device shall be integral to pump and supplied by pump manufacturer.
b.   Pump shall be equipped with leak detection to detect diaphragm failure. Leak detection shall be by the original pump manufacturer.
c.   All wetted parts, O-rings and seals shall Teflon.

E.   Sodium Hydroxide Feed Pump:

1.   Design Conditions:

a.   Tag  Numbers:     XXXXX
b.   Capacity (gallons/hour): 5
c.   Minimum Flow rate (gallons/hour): 0.5
d.   Operating Backpressure (pounds per inch): 50
e.   Maximum Backpressure: 150
f.    Fluid: Sodium Hydroxide 25 percent
g.   Wetted Parts: CPVC or PVDF
h.   Diaphragm: PTFE
i.    Inlet/Outlet Size NPT: 1 inch ID

2.   Pump Requirements:

a.   Pump shall be equipped with leak detection to detect diaphragm failure. Leak detection shall be by the original pump manufacturer.
b.   All wetted parts, O-rings and seals shall be Teflon.

F.   Sulfuric Acid Feed Pump:

1.   Design Conditions:

a.   Tag Numbers: XXXXXX
b.   Capacity (gallons/hour): 12
c.   Minimum Flowrate (gallons/hour): 0.3
d.   Operating Backpressure (pounds per inch): 50
e.   Maximum Backpressure (pounds per inch): 150
f.    Fluid: Sulfuric Acid 93 to 98 percent
g.   Wetted Parts: PVDF or PTFE
h.   Diaphragm: PTFE
i.    Inlet/Outlet Size NPT: 1 inch ID

2.   Pump Requirements:

a.   Pump shall be equipped with leak detection to detect diaphragm failure. Leak detection shall be by the original pump manufacturer.

b.   All wetted parts, O-rings and seals shall be Teflon.

G.  Pump Controls:
1.   Metering pumps shall  be  controlled as  described in  Section  17300,  Control Strategies and as shown on the P&IDs. Failure of the duty pump shall close a set of contacts and actuate alarms. The speed of  the feed pumps shall be controlled through speed indicating controllers and shall be flow paced from a 4-20 mA DC signal from the programmable logic controller (PLC). The speed indicating controllers shall be mounted in the field control panel (FCP). Remote contacts shall be provided to indicate operating lights and alarms on the face of the UCP. The chemical pumps shall be capable of remote starting and stopping through two sets of voltage free contacts from the PLC. The chemical pumps shall be provided with a low suction pressure switch and a high discharge pressure switch for pump protection. The pump shall be shutdown in either condition. Reset switches shall be provided to reset alarms.

H.  The UCP shall interface with the PLC, as shown on the Drawings.

I.    Variable Speed Drives: Variable speed drives shall be of the direct current drive type equipped to follow a 4 to 20 mA signal from the PLC.  Variable speed drives shall have the following features.

1.   Drive controllers shall be in a dust and oil tight enclosure with speed adjustment dial, manual-automatic, on-off, and start-stop switches.

2.   Input power shall be 115 V, 60 Hz, single phase.

3.   Drives shall be capable of overload up to 150 percent of full load torque for one minute.

4.   Drives shall be equipped to follow output signals (4 to 20 mA DC).  Full motor speed shall occur at maximum input signal; minimum motor speed shall occur at minimum input signal. Drive shall have isolated input for receiving PLC output signal of 4-20mA.

5.   Drives shall have a tachometer feedback for speed regulation with 1 percent accuracy over a 95 percent load change and shall provide 4-20 mA signal to pump station PLC. Drive shall have isolated output for providing PLC input signal of 4-20mA corresponding to speed of the pump with 20mA at maximum speed.

6.   The drive controller shall be provided with spare contactors for interconnection with remote devices.

7.   The   drive   manufacturer   shall   provide   isolation   transformers   and   other accessories to produce an operating system responsive to the requirements herein.

8.   The drive controller shall be mounted in the corresponding UCP and each drive controller shall be contained in a NEMA 4X 316 Stainless Steel enclosure.

9.   The drive controller shall have adjustments for maximum speed, minimum speed, current limit and torque.

10. The  pump  supplier  shall  have  unit  responsibility  for  the  performance  and operation of the variable speed chemical feed pumps and drives.

11. EMI and RFI emissions shall not exceed the levels referenced in FCC Rules and Regulations Volume 2 Part 15 Subpart J Class A. If after installation, any interference or  noise occurs, the  supplier shall take corrective action by installing additional equipment or corrective measures required, at no additional cost to the OCSD.

J.   Motors: Motors shall be 1/2 HP, 3 phase, totally enclosed non-ventilated (TENV) with NEMA 56C face with mounting feet and thermal overload and 1,750 rpm base speed. Thermal overload shall be connected to the failure alarm.  Motors shall be in accordance with Section 16220, Electric Motors.

K.   Fasteners:  All bolts and cap screws shall be Type 316 stainless steel. All anchor bolts, nuts and washers shall be Type 316 stainless steel and of sufficient length to allow
1-1/2 inches of grout under pump bases.

L.   Guards:   Guards shall be provided at all exposed couplings, drives and shafts in compliance with Section 11005, Equipment: Basic Requirements.

2.2      CALIBRATION CYLINDERS

A.   Calibration cylinders shall be designed for chemical pump calibration. The calibration cylinders shall consist of a plastic, graduated cylinder with a capacity and mounting nipple as indicated below. Calibration cylinders shall be supplied by Griffco, Koflo, Milton Roy, Pulsafeeder, Or Equal.

2.3      PULSATION DAMPENERS

A.   Sodium Hypochlorite and Sodium Hydroxide Service:   Each diaphragm metering pump shall be equipped with a pulsation dampener and isolation ball valves. Pulsation dampeners shall be single diaphragm type and shall limit pressure oscillation above and below mean pressure to a maximum of 5 percent with the air chamber charged to a pressure of 50 percent of mean line pressure.   Pulsation dampeners shall of the chargeable type and shall include a  2-1/2-inch stainless steel pressure gauge. The bottom chamber shall be CPVC or PVDF, the top air chamber shall be CPVC or PVDF, and the diaphragm shall be Hypalon.  Pulsation dampener shall be rated for 150 pounds per inch pressure. Pump manufacturer shall submit calculation for the size of the dampener based on stroke volume of the selected pump. Pulsation dampeners shall be Blacoh, Milton Roy, Pulsafeeder, Or Equal.

B.   Sulfuric Acid Service:   Each diaphragm metering pump shall be equipped with a pulsation dampener and isolation ball valves. Pulsation dampeners shall be single diaphragm type and shall limit pressure oscillation above and below mean pressure to a maximum of 5 percent with the air chamber charged to a pressure of 50 percent of mean line pressure. Pulsation dampeners shall be of the chargeable type and shall include a 2-1/2-inch stainless steel pressure gauge. For the sulfuric acid service, the pressure gauge shall be 2-1/2-inch molded PVDF. The bottom chamber shall be PVDF, the top air chamber shall be PVDF, and the diaphragm shall be Teflon.  Pulsation dampener shall be rated for 150 pounds per inch pressure. Pump manufacturer shall submit calculation for the size of the dampener based on stroke volume of the selected pump. Pulsation dampeners shall be Blacoh, Milton Roy, Pulsafeeder, Or Equal.

2.4      ACCESSORIES

A.   The  CONTRACTOR  shall  provide  discharge  pressure  gauges  with  isolation diaphragm seals and valves for chemical feed systems as shown on the Drawings and specified in Section 17405, Process Instrumentation and Control.

2.5      UNIT CONTROL PANEL

A.   Refer to Section 16442, Control Panels, and applicable section of Section 17405, Process Instrumentation and Control.

2.6      OTHER MATERIALS

A.   Fabrications: Steel fabrications for mountings and anchorages shall conform to the requirements of ASTM A-36 for fabricated steel.

B.   Shop Coatings: Shop coat exposed ferrous metal surfaces in conformance with
Section 09800, Protective Coating.

PART 3 - EXECUTION

3.1      INSTALLATION AND STARTUP

A.   The CONTRACTOR shall examine the equipment delivered to the site to determine that it is in conformance with the approved shop drawings.   The equipment shall be installed in conformance with Section 11005, Equipment: Basic Requirements.   The CONTRACTOR  shall  coordinate  activities  with  the  instrumentation,  monitoring  and control work specified in Division 17. At no additional cost to the OCSD, the CONTRACTOR shall furnish the services of a competent factory-trained representative of equipment supplier or manufacturer to assist in and supervise the initial operation.

3.2      FIELD COATING

A.   Field coat exterior surfaces in conformance with Section 09800, Protective Coating. Before placement of any equipment, the CONTRACTOR shall finish coat any exterior surfaces which will rest on slabs or be otherwise covered up.

3.3      SPARE PARTS

A.   One complete set of spare parts to include a diaphragm, a set of check valve seats and balls, gaskets, O-rings, and other consumable parts shall be included for each pumping head on each of the systems.

3.4      MAINTENANCE OF INSTALLED EQUIPMENT

A.   Maintain the operability and functionality of all installed equipment valves between the time of installation and the commissioning period. See Specification section 01660 for requirements.

3.5      FIELD SERVICES

A.   Furnish the services of authorized technical representatives of the Manufacturer to assist/inspect the installed equipment and to certify that the equipment has been properly installed and is ready to operate, train OCSD personnel, conduct pre-operational mechanical checkout of the equipment, place equipment into operation, optimize the performances of the equipment and perform the field performance testing.

B.   At a minimum, conduct four separate site visits as follows:

a.   Inspection of equipment installation – two trips (8 hours minimum, each)

b.   Training of  OCSD  personnel.  See  Specification section  01820,  Training  of OCSD Personnel, for requirements.

c. Commissioning.    See Specification section 01810, Commissioning, for requirements.   Number of hours shall be as required to meet all testing and commissioning requirements, but shall not be less than 16 hours.

3.6      EQUIPMENT TESTING

A.   Equipment testing shall conform to the requirements of Section 11005, Equipment: Basic Requirements.