# Development of Chemical Precipitation Purchased Equipment Costs: Chemical Feed Systems

Purchased Equipment Costs are the sum of the following cost elements:

(1) Pump Costs
(2) Tank Costs (3) Chemical Feed System Costs
(4) Mixer Costs
(5) Clarifier Costs (6) Filter Press Costs
(7) Sand Filter Costs

Each cost component includes the cost of freight and associated ancillary equipment such as piping,
valves, and controllers.

The following documents provided by a vendor support EPA’ s development of cost element (3 ) by providing details and specifications for solid chemical feed systems used in the Steam Electric cost

model.© EnPro Technologies Ltd Revision: 1/2011 

# S ILO 

# P AC 

# TM

Reduce Operator Handling of Dry Chemicals

Typical Hydrated

Lime Silo Configuration  The Most Efficient Delivery Method in the Industry

 Various Pump Types, and Models

Available

 8’ to 15’ Diameter Available in Factory

Welded

 16’ to 36’ Diameter Available in Field

Welded

 Concave Mix Tank for Maximum Equipment Room Space

 All Piping and Conduit located under floor

or above head to eliminate hazards

 PLC Controlled Systems for Complex

Processes

The EnPro Silo Pac is a unique product that eliminates quality control issues that are typically seen in most silo systems. EnPro provides the

Silo Pac in two sections as described below.

The lower equipment room is where all of the process equipment is located this section is typically 12’ diameter by 11’ tall. This section will have all of the process equipment installed at our manufacturing facility. Here we can not only install the equipment, but we also operate the entire system as if it was already in the field. This insures that startup will be as painless for the customer as possible.

The upper storage section will be shipped to the job site so the contractor can bolt it to the top of the lower equipment room. Each section has a junction box located at the bolting flange to allow the contractor to electrically connect the two pieces. This process is the most efficient delivery method in the industry. Custom models and options

available, consult factory.

Contact us at

4225 NE Port Dr. Lee’s Summit, MO 64064 816-795-6333 phone

816-795-6030 fax www.enpro-tech.com© EnPro Technologies Ltd Revision: 1/2011 The EnPro Silo Pac is used to st ore, feed, dissolve, and deliver chemical to the desired process point. They are used in many applications for municipal and industrial waste and water treatment applications. Typi cal applications include:

 Neutralization and PH control

 Heavy metal removal

 Taste/odor control

Each silo is custom engineered to your specifications with multiple options available. These systems normally include:

 Storage Silo (pre assembled two piece design) – Sizes range from 8’-0” up to 15’-0” in diameter.

 Pneumatic silo fill pipe assembly with NEMA 4X operator station.

 Dust collection system (mounted on roof).

 Osha approved caged ladder & hand rail for roof

access.

 Silo level devices. Continuous and or point level.

 Bin Activator or Vibrators.

 Volumetric screw feeder with washdown inverter duty motor and variable frequency drive.

 Slurry make down/storage tank with mixer, and level

devices.

 Slurry feed pumps if required.

 All required piping and valves.

 Local control system with programmable logic controller (PLC) including pre-programmed system logic. All systems are comple tely tested with water for the engineer or customers viewing before leaving our facility. All of EnPro’s control panels are UL or CUL

listed.

 Silo systems are provided with ventilation fans, heaters and lighting. The interi or of the skirt section is

insulated.

The Silo Pac Advantages

 Factory testing on all of our systems. These tests

include:

o Pressure testing all piping, and valves.

o Hydrostatic testing of our mix tanks.

o Complete sequencing of all devices, including motors and solenoids.

o All inspected by an EnPro quality assurance inspector.

 Due to the fact that EnPro provides the most complete pre assembled silo system on the market, it ultimately saves time for the contractor, and eliminates frustrating installation issues.

 EnPro’s service and technical support staff are the most experienced in the industry. Contact our applications department for more details on the Silo PAC System at the following:

David Jones: (816) 350-5242

Troy Litherland: (816) 350-5223

Jesse Kuntz: (816) 350-5244 

# S ILO 

# P AC 

# TM

Reduce Operator Handling of Dry Chemicals[proj ect] Page 1 of 11



### PLEASE CONTACT ENPRO FRO SPECIFICATIONS IN WORD FORMAT

SPECIFICATION: BULK DRY CHEMICAL SILO STORAGE AND FEED SYSTEM

- MIX TANK



## ENPRO TECHNOLOGIES LTD.

NOTE: All items in red are optional or decisions to be made regarding voltage, tank capacity, metering p umps if applicable,

panel enclosure material, etc.

PART 1 GENERAL

1.01 SECTION INCLUDES

A. Bulk d ry chemical silo storage and feed s ystem

1. The bulk dry chemical silo storage and feed system shall be capable of storing up to XXX cubic feet of dry che mical, metering the dry chemical and mixing the chemical with water for feed to process.

1.02 WARRANTY

A. The system shall be covered by a one (1) year limited warranty against defects in materials and workmanship.

1.03 SUBMITTALS

A. P roduct Data:

1. One (1) electronic copy of submittal data will be supplied for the system

. 2. One (1) Hard copy and one (1) electronic copy of the operations and maintenance manual will be shipped with the system.

B. Shop Drawings:

1. Component data and shop drawings of the system will be supplied , including dimensions, weight , and parts list.

2. C ontrol panel elevation, control schematics and component data will be supplied

.

1.04 QUALITY ASSURANCE

A. Manufacturers Qualifications:

1. The equipment shall be the product of a systems supplier who is regularly engaged in chemical feed system design and supply.

2. The major comp onents of the Bulk Storage and F eed System shall be furnished by a single supplier to facilitate maintenance and stocking of repair parts as well as providing a single source of responsibility over the system.[proj ect] Page 2 of 11 3. The specifications and drawings covered by this section are based on the equip ment manufactured by EnPro Technologies Ltd.

4. The system supplier shall prepare shop drawings that verify that each system component is compatible with other components of the system, and that piping materials and sizes are appropriate, and that all devices necessary for a properly functioning system have been provided.

5. Demonstrate to the satisfaction of the ENGINEER that the quality is equal to equipment made by the manufacturers named herein.

6. Owner may require verification of qualificatio ns by requesting the following

information: a) Financial Capability. b) That the manufacturer maintains a design office with a qualified technical

staff. c) That the manufacturer has and will maintain competent service personnel to service equipment furnished. d) That manufacturer has successfully provided similar work for at least five (5) years.

B. System to be pre

- assembled and shop

- tested to the fullest extent practical to assure compliance with the operational requirements.

PART 2 PRODUCT S

2.01 MANUFACTURERS

A. Provide a quantity of

_____ bulk dry chemical silo storage and feed system(s) as manufactured by EnPro Technologies of Lee’s Summit, MO or engineer pre

approved equal

. Should equi pment of a different type or size w hich otherwise differs from that specified herein be offered, such equipment shall be acceptable only on the basis that any revisions in the design and/or construction of the structure, piping, appurtenant equipment, electrical work, etc, required to

accom modate such a substitution shall be made at no additional cost to the Owner, shall be the responsibility of the Contractor and shall be as approved by the Engineer.

2.02 IDENTIFICATION

A. A corrosion resistant nameplate shall be supplied on the system

. Nameplate information to include equipment model numbe r, serial number and contact phone number for support.

2.03 EQUIPMENT

A. Storage Silo :

1. The storage silo shall be of all we lded, mild steel construction. Silo roof, straight

- wall, cone, and support skirt shall be fabricated of ASTM A

- 36 steel per manufacturer’s professional engineer’s design based on the silo diameter, height & configuration. The maximum overall silo height shall be approximately 33 feet (not includ ing bin vent filter / dust collector), and 12 feet[proj ect] Page 3 of 11 diameter. The height of the silo shall be such that the usable capacity of the storage section is approximately 1500 cubic feet.

2. The storage silo shall be designed to accommodate all dead loads including vibration from bin vibration devices plus a full live load of chemical ( XXXXX

lbs minimum for design purposes) having a bulk density of XX pounds per

cubic foot (for weight calculation purposes). Seismic load forces shall be per

IBC 2006.

3. The interior of the storage compartment shall be smooth with no inward projecting elements (except for plates to protect the bin level sensors specified elsewhere).

4. The storage bin shall be completely dust

- tight and watertight. All connections to the storage compartments shall be by flanged gasketed connections.

Gaskets shall be of the full

- faced type of neoprene or approved equal. All bolted connections shall utilize zinc plated or stainless steel nuts, bolts, and

washers.

5. The interior skirted portion of the silo shall be furnished with minimum 1”
thick, closed

- cell foam. All seams are to be taped.

6. The storage silo shall be delivered to the job site in two sections as outlined

below.

a. The equipment room section shall house all equipment including but

not limited to mix tank, feeder, bin activator, pumps, and control panel. All of which shall be installed at the factory and pre

- piped and pre

wired and hydraulically tested and demonstrated to the customer at the manufacturers facility. The equipment room section shall cons ist of the lower silo ring and shall be supplied with a bolting flange to allow the storage section to bolt to the top of the equipment room

section.

b. The storage section shall be structurally designed to store the required chemical. The storage section sha ll have all components including but not limited to level devices, dust collector blower, and dust collector shaker. All of which shall be pre

- wire to junction boxes.

7. Anchor bolts, Sixteen (16), to be supplied by the installing contractor.

B

. Painting an d Preparation :

1. Sandblast to SSPC

- SP

- 6.

2. Primer shall be a corrosion inhibitive polyamide epoxy primer.

3. Finish Coat shall be a two

- component polyurethane. Factory

- applied, thermally cured.

4. The color shall be EnPro standard.

C. Bin Roof :

1. The bin roo f shall be pitched 1:12 for drainage purposes. The roof shall be designed to support all roof appurtenances, plus superimposed live load of at least 50 pounds per square foot.

2. At least four (4) lifting lugs shall be provided at the top of the bin. Lift ing lugs

shall be 3⁄4

- inch thick or larger steel plate with 2

- inch diameter hole for use with lifting devices.

3. Railings and kick plates shall be provided around the perimeter of the storage bin roof as shown on the drawings. All ladders, cages, platforms, a nd[proj ect] Page 4 of 11 handrails shall conform to OSHA standards as well as any other applicable building or safety codes. All handrails shall be 2

- rail handrail type with kick plate.

4. The bin roof shall have the following connections:

a. A flanged nozzle type connection of 1⁄4

- in ch steel plate suitable to support

the bin vent filter.

b. A 24

- inch diameter (minimum) steel man way with hinged, gasketed

cover and handle

- type locking mechanism.

c. A flanged nozzle suitable for use with the high level sensor.

d. A flanged nozzle suitable for us e with a pressure vacuum relief valve.

e. A flanged nozzle suitable for use with the target box of the chemical supply piping.

D. Discharge Hopper :

1. The discharge hopper shall be cone shaped with side slope measuring 60 degrees from horizontal. The bott om of the hopper shall have a flanged connection and drilled to match the equipment specified herein.

2. The side of the storage compartment shall include an opening for the

intermediate and low level sensors and located to be accessible to the operators. Pi tched plates with angles greater than the angle of repose of the chemical being stored shall be positioned above the level sensor to protect the sensor from falling material during silo filling. These plates shall be the only protrusion on the inside silo wall.

3. Size of anchoring pressure plates shall be determined by manufacturer’s design as designed by a professional engineer.

E. Wall Penetrations :

1. All wall penetrations shall have a minimum thickness of 1/’4

- inch for all square or rectangular shapes, all round penetrations shall not be less than schedule 40. All penetrations shall be completely seal welded.

F

. Flanges :

1. Where applicable, all flanges shall be a minimum 150

- pound connection unless otherwise noted within these specifications.

2. Angle Rings shall be provided at the cone intersect and silo roof intersect if required by manufacturers manufacturing process. Angle rings shall be 3” x 3” x 1⁄4” rolled angle. If required for structural purposes, suitable flat plat is acceptable.

G. Bin L evel Switches :
1. Bin level switches shall be mounted for high, intermediate, and low level indication in the chemical storage bin. These switches shall be of the stainless steel rotating paddle type, electrically operated. All bin level

switches shall be easily accessible. An audible and visual alarm shall be activated when either high or low

- level bin switch is activated. High and low level switches shall include an extra set of contacts for user direct hookup on[proj ect] Page 5 of 11 terminal strips provided in the main c ontrol panel for remote monitoring

purposes.
2. The bin level switches shall be manufactured by Bindicator or engineer approved equal.

H. Bin Activator(s):

1. A heavy

- duty, motor driven bin activator shall be mounted to the silo

cone. The bin activato r shall be a minimum of 4

- foot diameter with a discharge opening suitably sized for the mating equipment. Controls of

the bin activator will be inter

- locked with the feeder control circuit and will operate only when the feeder is in operation.

2. The bin act ivator shall operate on 460 volt, three

- phase power.

3. The bin activator shall be as manufactured by Kinergy or eng ineer approved equal.

I

. Maintenance / Knife Gate:

1. A manually operated, slide type maintenance gate shall be provided

between the cone and flexible connection.

2. The bin gate shall be manually operated, dust tight and arranged for easy access by plant operators.

3. The bin gate shall be manually operated with a chain wheel arrangement for ease of operation from the equipment room floor.

4. The bin gate shall have a minimum clear opening of 144 square inches to provide chemical flow out of the storage bin.

5. The bin gate shall be as manufactured by Dezurik or engineer approved equal.

J

. Bin Vent Filter:

1. A bin vent filter shall be flange mounted on the chemical storage bin roof. The unit shall be pre

- wired and functionally checked. Units shall be mounted by the installation contractor. Unit shall be an open bottom, flanged mounted mechanical shaker type collector designed to shake

retai ned bag dust directly into the storage silo during shaker operation.

2. The bin vent filter shall have a venting capacity of 1500 cfm, based upon a maximum air to cloth ration of 5 cfm per square foot, at 3” of water

differential.

3. Filter shall be fabricated o f weatherproof and drip

- proof construction, with

self

- contained bag shaker and exhaust fan assemblies.

4. All parts of unit subject to service or maintenance, shall not be more than five feet above the mounting flange, and be accessible without the use of

any service platforms or ladders.

5. The bin vent filter housing shall be fabricated of not less than 12 gauge carbon steel. The housing shall be of one

- piece construction with all seams continuously welded. Spot welding or skip welding shall not be acceptable . The housing shall have two (2) access doors, which shall be totally removable, or be able to open on a swing hinge assembly for quick inspection. The doors shall give complete access to the filter bag compartment and to the shaker compartment.

6. The clot h area of the filter shall be 300 square feet.[proj ect] Page 6 of 11 7. Filter bags shall be cylindrical and removable without the use of any tooling. Each bag shall pivot on a filter tube sheet and hang from the

shaker mechanism with an automatic self

- tensioning spring. Envelop e type bags or bags without self

- tensioning shall not be acceptable.

8. Unit shall be designed so that an operator may be able to open the inspection door during operation, without allowing dust to escape while unit is in operation. Each bag shall be constru cted of materials suitable for handling the chemical specified. All bags shall be installed at the factory, Bag manifold shall be constructed to prevent filter bags from falling into the storage silo.

9. An electrically operated mechanical bag shaking mecha nism shall be provided as an integral part of the bin vent filter. Shaker assembly shall be operated by a 1/3 HP, 230/460, 1725 RPM, TEFC motor.

10. Unit shall contain a mechanical oscillator assembly, sealed for life lubrication system, and be enclosed in a weatherproof enclosure.

11. Oscillator assembly shall be directly connected to a free

- floating bag holding manifold which shall shake the dust collector bags during operation. Shaking mechanism shall be a direct drive unit. Belt drive units are unacceptable.

12. An exhaust fan shall be included as an integral part of the bin vent assembly. The fan shall be a squirrel cage type, operating at 3450 RPM. The unit shall provide a negative pressure within the storage silo during truck unloading operation, and shall be operated by a 3 HP, 230/460 VAC, TEFC motor.

13. NEMA 3R disconnect switches shall be furnished for the exhaust fan and shaker mechanism motors. Disconnects shall be factory mounted and wired adjacent to each motor.

14. The unit shall be Model 17

- 04, as manufa ctured by EnPro Technologies without exception.

K

. Silo Fill Piping :

1. Conveying Pipe: A 4

- inch diameter, Schedule 40, carbon steel conveying pipe shall be furnished complete with all the necessary compression type couplings. Conveying pipe shall begin at the truck unloading station and terminate at the inlet target box. Fill system conveying pipe shall be mounted at the factory, and removed for shipping purposes. The CONTRACTOR shall be responsible for re

- mounting the conveying pipe

in the field

. 2. Long Radius Elbows: Wherever the filling pipe makes a turn, a 4

- inch diameter Schedule 40, carbon steel elbow, 4 ft. radius (minimum), shall be provided and installed. Compression type couplings shall be provided to join the elbows with the vertical fi ll lines, the inlet target box, and the

individual horizontal/vertical runs.

3. Fill System Pipe Adapter: A 4

- inch bronze Kamlock type adapter shall be mounted on the fill pipe at the truck unloading station. A bronze or painted carbon steel dust cap and ch ain shall be provided.

4. Inlet Target Box: A heavy

- duty inlet target box shall be mounted on the storage bin roof flanged connection. Target box shall be designed to kill the velocity of the chemical being conveyed, and allow it to drop into the[proj ect] Page 7 of 11 storage bi n in an even patter. Target box shall be provided with a removable end cap to facilitate cleaning of the fill system.

L

. Limit Switch:

1. A limit switch shall be mounted on the pipe adapter to provide automatic operation of the bin vent filter, during and after truck unloading cycle. Limit switch assembly shall be adjustable and secured to a heavy

- duty mounting bracket for dependable operation. Limit switch shall be complete with two sets of N.O. and two sets of N.C. contacts wired into the unloading control panel to numbered terminal strips for remote

indication.

M

. Truck Unloading Control Panel:

1. A NEMA 4X stainless steel control panel shall be wall mounted at the termination of the fill pipe and as shown on the drawings. Panel shall be

pre

- wir ed by the supplier and contain, but not be limited to the following items of equipment: High, reorder and low bin level indicating lights, alarm horn with press

- to

- test pushbuttons, H

- O

- A switches for bin vent filter motor(s), and adjustable timer, (0

- 15 minutes) for operating bin vent filter mechanical bag shaker. Numbered terminal strips pre

- wired for connection of bin level alarms and unloading indication and a numbered terminal strip with at least 25 percent extra terminal blocks shall be provided. T ruck unloading station shall be installed and tested at the factory. Truck unloading panel shall be integrated into the silo PLC. All

wires shall be numbered with adhesive labels. All electrical components interconnected to the control panel shall termin ate at numbered and labeled terminal blocks. The terminal blocks shall be sized for 14 ga. wire. Wires shall be neatly run through wire race

- way and numbered with adhesive type labels. The truck unloading panel shall be manufactured by a UL508 panel shop. All control panels shall be UL508 certified and labeled. Control panels that do not have a UL label shall not be acceptable

.

N

. Volumetric Feeder:

1. A heavy

- duty volumetric feeder shall be provided to feed chemical at a

maximum rate of XX.X pounds per h our.
2. Feeder controls shall incorporate an ac drive, which shall be capable of receiving a 4

- 20mA signal from the silo PLC located in the system control panel. The drive must be capable of sending a 4

- 20mA signal to the silo PLC. The signal shall be propor tional to the actual drive speed. This speed shall be displayed on the silo operator interface terminal. The drive shall be a Power Flex 40 manufactured by Allen Bradley or engineer approved equal.

3. Feeder shall have a repeatable accuracy of plus or minus 2 percent.

4. Feeder shall have an inlet opening of at least 144 square inches to insure a positive flow of chemical out of the storage hopper through the feeder.

5. Motor shall be a TENV 1/2 HP (minimum) inverter duty permanent magnetic type.

6. Materials of Const ruction:

i. Housing Assembly

– 304 stainless steel, minimum 10 gauge.

ii. Discharge Spout

– 304 stainless steel and PVC[proj ect] Page 8 of 11 iii. Auger

– 304 stainless steel.

7. Mechanical Features:

i. Solid flight feed auger

ii. The feeder discharge shall include a PVC downspout with

removable ca p.
iii. The inlet of the downspout shall be slotted for easy removal.

iv. The downspout shall have a close tolerance fit to the adapter plate on the mix tank.

O

. Transitions:

1. Provide a flexible transition required to interconnect volumetric feeder to

silo dis charge while reducing vibration transfer from the bin acti vator to the process equipment.

2. Provide rigid transitions as required to interconnect volumetric feeder to the flexible transition at the silo discharge.

P

. Solution/ Mix Tank:

1. A XXX

- gallon che mical solution/slurry mix tank shall be provided below

the chemical feeder.

2. The mix tank shall be constructed of 10

- gauge type 304 stainless steel.

3. The tank shall include a minimum of four (4) hold down clips for anchoring

4. The tank design shall provide for a minimum of 4” freeboard, be properly baffled to prevent short

- circuiting of chemical from tank inlet to outlet, and will include a hydraulically operated dust and vapor remover system. The water from the dust and vapor remover shall be directed into th e opposite

side as the feeder inlet side of the baffle.

5. The solution tank shall have, as a minimum, the following connection:

i. Inlet water connection

– 1 1⁄2”.

ii. Tank drain connection

– 2”.

iii. Overflow connection

– 2”.

iv. All solution/slurry tank piping shall be rigi dly mounted on the tank at the factory.

6. The solution tank shall have easy access to internal operating devices for observing operation and performing routine maintenance. Each solution tank shall have a stainless steel hinged or lift

- off cover to observe operation and provide access to all system components within the tank.

7. A mechanical mixer shall be provided to maintain a uniform strength solution or slurry. The mixer shaft and mixer blades shall be type 304

stainless steel. The mixer motor shall be a minimum 1⁄4 HP, TEFC, 480 VAC, 3 Ph, 60 Hz, inverter duty. The mixer shall be controlled by a variable frequency drive to allow turn down. The drive shall be a Power flex 4 manufactured by Allen Bradley or engineer approved equal.

8. A dilution water panel for control of supply water to the solution tank shall be furnished. It shall contain Schedule 80 PVC piping. The water supply lines and distribution of inlet water shall have the following components

as a minimum:

i. Qty 1

- 1 1⁄2” solenoid valve.

ii. Qty 1

– Pressur e gauge with scale of 0 to 100 psi.

iii. Qty 1

– Rotometer with 0 to XX GPM.

iv. Isolation Valves as required.[proj ect] Page 9 of 11 9. The solution tank shall be provided with an automatic level alarm system of the pressure transducer type for monitoring level continuously. The

pressure transducer shall be compatible with the required chemical. The pressure transducer shall send a 4

- 20mA signal to the silo PLC to set the proper alarms. The pressure transducer shall be manufactured by Endress & Hauser or engineer approved equal. The level points shall be

as follows:

i. High Level Alarm: This alarm function shall light a light on the control panel, sound an audible alarm on the control panel, close a dry contact for remote alarm indication, and shut off the dry chemical feeder.

ii. System Disable: This level point will turn off the feeder and

solenoid valve.

iii. System Enable: This level point will turn on the feeder and

solenoid valve.

iv. Low Level Alarm: This alarm function shall light a light on the control panel, sound an audible alarm on the control panel, close a dry contact for remote alarm indication, shut off the dry chemical feeder, and close the control valve.

Q

. Slurry Pumps:

1. The pumps shall be manufactured by XXXXXX or engineered pre

approved equal.

2. The pump capacity shall be XX gpm at XX psi.

3. The lime system shall be supplied with two XXXXX pumps located inside the equipment room of the silo.

4. The pumps shall be variable speed and controlled by a variable frequency drive. The drives shall be provided by the silo manufacturer and located in the lime main control panel. The variable frequency drive shall be Allen Bradley power flex 40 or engineer pre

- approved equal.

R

. Controls:

1. Provide a wall mountable NEMA 4X, 304 or 316 stainless steel system control panel to control the operation of t he chemical mix tank and its associated equipment. The main control panel shall house all electrical components required for a fully functional system. The system shall be designed to receive a 480 VAC / 3 phase service. The control panel shall supply all required transformers

, relays, and other control devices required for a complete operable system. The control panel and all components shall be industrial duty. All electrical components interconnected to the control panel shall terminate at numbered and labeled terminal blocks. The terminal blocks shall be sized for 14 ga. wire. Wires shall be neatly run through wire race

- way and numbered with adhesive type labels.

2. The system shall utilize a programmable logic controller. The PLC shall be capable of com municating with the supervisory system via Ethernet. The PLC shall be manufactured by Allen Bradley or engineer approved equal.

3. The operator interface terminal shall be located on the front of the enclosure. The operator interface shall have all required s oftware pushbuttons and selector switches for a fully functional system. The[proj ect] Page 10 of 11 operator interface shall display all running indications, all alarm messages. The operator interface shall be a Panel View Plus manufactured by Allen Bradley or engineer approved equal.

4. The main control panel shall be manufactured by a UL508 panel shop. All control panels shall be UL508 certified and labeled. Control panels that

do not have a UL label shall not be acceptable

. 5. The operator interface terminal shall have the followin g features:

a. Auto Control Page

I. System Start

II. System Stop

III. Concentration Numeric input (0

- 10%)

IV. Master Auto

V. Master Hand

VI. Running indications for the following:

1. Feeder

2. Mixer

3. Solenoid Valve

4. Bin Activator

5. Exhaust Fan

6. Pump 1

7. Pump 2

8. Actual Speed Readout for the fo llowing:

a. Feeder (0

- 100%)

b. Pumps Page

I. Pump 1 On/Off/Remote

II. Pump 2 On/Off/Remote

III. Pump 1 local speed set point (0

- max gpm)

IV. Pump 2 local speed set point (0

- max gpm)

V. Pump 1 Actual speed (0

- max gpm)

VI. Pump 2 Actual speed (0

- max gpm)

c. Alarms Page

I. Alarm messages for t he following alarms:

1. Mixer Overload

2. Feeder Fault

3. Pump 1 VFD Fault

4. Pump 2 VFD Fault

5. Pump 1 Leak Detected

6. Pump 2 Leak Detected

7. Bin Activator Overload

8. Mix Tank Low Level

9. Mix Tank High Level

d. Mix Tank Page

I. Mix Tank Level (0

- 100%)

II. High Level Set Point Numeric In put

III. Low Level Set Point Numeric Input

2.0 6 OPTIONS

1. Water Pressure re duc ing valve (provided lo o se for field installation).[proj ect] Page 11 of 11 2. Load cells for bulk bag frame weight

3. Loss of weight volumetric feeder.

4. Electronic water flowmeter with analog output to volu metric feeder for constant concentration of chemical. Requires PLC based controls.

PART 3 EXECUTION

3.02 INSTALLATION

1. Bulk d ry chemical silo storage and feed system ( s ) shall be installed in strict

conformance with the manufacturers installati on instructions. Installation to

include sub

- asembly of major components, field piping, interconnecting wiring

and all supports and miscellaneous hardware not specifically stated herein. This work shall include bringing sources of power, water and compressed air (if required) to the system suppliers termination points.

2. Checkout of final installation, start

- up, calibration and instruction of opera ting personnel shall be performed by an authorized representative of the

manu facturer . Startup service to be performed in two (2) trips; (1) trip of three (3 ) day s for installation check and equipment start

- up and (1) trip of two (2) days

of on

- site training of personnel exclusive of travel

.

.



### - END SECTION

-[Schematic diagram has been redacted to prevent disclosure of material for which a claim of confidential

business information has been made.][Schematic diagram has been redacted to prevent disclosure of material for which a claim of confidential

business information has been made.]