Supply and deliver approximate two American-made dry chemical feeders

Town of Merrimack,
New Hampshire
6 Baboosic Lake Rd * Merrimack, NH 03054 * www.merrimacknh.gov
September 29, 2026
REQUEST FOR BID
DRY CHEMICAL FEEDER
Sealed bids will be received by the Town of Merrimack until 2:00 pm on Monday, October 19,
2026 to furnish and deliver approximate two (2) American Made complete dry chemical feed
systems to the Town of Merrimack Wastewater Treatment Facility according to the enclosed
specifications and following conditions.
The bid shall be submitted on the Bid Form furnished herewith and shall exclude state and federal
taxes not applicable to municipalities. The bid price shall include delivery and be quoted F.O.B.
Town of Merrimack, Wastewater Treatment Facility, located at 36 Mast Rd, Merrimack, NH. The
time required for delivery must be indicated on the Bid Form and be guaranteed.
The Town reserves the right to reject any or all bids, to waive irregularities in the bids, and to
accept the bid which best serves the interest of the Town.
Two copies of the bids must be sealed and marked "Bid on Dry Chemical Feed System" and be
delivered to the Town of Merrimack Finance Department, 6 Baboosic Lake Rd, Merrimack, NH
03054 by the time specified above .
It is the bidder's responsibility to confirm the bid is received by the Finance Department by the
date and time specified.
The Town of Merrimack's Purchasing Policy is available on the Town's website:
https://www.merrimacknh.gov/322/Bid-Opportunities; a copy may contact the Purchasing Agent.
For additional information, please contact Sandra Song, Purchasing Agent, at
ssong@merrimacknh.gov or (603) 424-7075.

TOWN OF MERRIMACK, NEW HAMPSHIRE
TOWN _______________________________________________
FINANCE DEPARTMENT
6 Baboosic Lake Road Tel: 603-424-7075
Merrimack, NH 03054
BID SPECIFICATION
PART 1 - GENERAL
1. DESCRIPTION
A. The Town anticipates purchasing approximate two (2) complete, factory-assembled dry
chemical feed systems. However, the actual quantity purchased may be less than the estimated
quantity and will be determined based on bid price and available funding.
B. Bidders shall provide a firm unit price for each complete, factory-assembled dry chemical feed
system, as specified herein, for delivery to the Town and installation by the Town.
C. The feeder shall be the volumetric dry solids type for feeding Sodium Bicarbonate with an
approximate bulk density of 66 pounds per cubic foot, at a maximum rate of 500 pounds per
24-hour day.
2. QUALITY ASSURANCE
A. The dry chemical feeder system shall be furnished by a single bidder with all manufacturing
and assembly of the equipment and controls carried out in the supplier's facilities.
B. The bidder shall have a minimum of twenty (20) years of experience in providing similar
equipment in municipal installations.
C. Due to supply chain issues the town of Merrimack will only consider American Made
3. SUBMITTALS
A. Shop Drawings
1. Shop drawings shall show the design, dimensions, connections, and other details necessary
to ensure that they accurately interpret the Contract Documents and shall show adjoining
work in such detail as required to provide proper connection with same. Where adjoining
work requires shop drawings, they shall be submitted for review at the same time so that
connections can be accurately checked.
2. Data sheets shall show illustrated cuts of item to be furnished, scale details, dimensions,
capacity, performance, characteristics, efficiencies, wiring diagrams, controls and other
pertinent information, as applicable.
3. Shop drawings shall be submitted within four (4) weeks from the Notice of Award.

TOWN OF MERRIMACK, NEW HAMPSHIRE
TOWN _______________________________________________
FINANCE DEPARTMENT
6 Baboosic Lake Road Tel: 603-424-7075
Merrimack, NH 03054
B. Operation & Maintenance Manual:
The Operation & Maintenance Manual submittal shall be specific to the equipment furnished.
Initially, one (1) draft copy shall be submitted for town review. Upon approval, the manufacturer
shall furnish two (2) copies and one (1) electronic copy.
PART 2 - PRODUCTS
1. ACCEPTABLE MANUFACTURERS
A. Acrison W105Z, Inc., Moonachie, NJ
B. Vibra Screw VSF 150, 755 Union Blvd, Totowa, NJ 07512
C. Or Equal
2. VOLUMETRIC FEEDER
A. The feeder shall employ a dissimilar speed, Double Concentric Auger Metering
Mechanism mechanically geared together in a specific ratio to each other that produces
uniform product density for accurate and continuous material feed without flooding,
bridging or voids. The feeder housing shall be dust-tight with a minimum of 11 gauge steel
construction. The feeder shall be heavy-duty and designed to provide easy cleaning without
the need for removing the feeder from its mounting, or disassembling flexible connectors,
hoppers. The feeder shall be constructed to provide complete access to its internal
components by simply removing its discharge spout. The feeder's double augers, drive
shafts and seal housing shall be constructed of 304 stainless steel; the seals shall be
synthetic.
B. The Double Concentric Auger Metering Mechanism shall consist of a solid flight metering
auger and a concentric conditioning auger (Intromitter) operating in a mechanically "fixed-
ratio" to each other. The larger conditioning auger (Intromitter) shall span the full length
of the feeder chamber and shall be driven at a slower speed than the smaller metering auger,
filling the auger from a full 360 degrees, thereby eliminating the possibility of the metering
auger not filling with material. This mechanical design shall increase the torque capability
associated with the large conditioning auger (Intromitter) to ensure low speed starting. The
feeder shall be powered by a single, 1/2 HP, AC inverter duty motor, wash down.

TOWN OF MERRIMACK, NEW HAMPSHIRE
TOWN _______________________________________________
FINANCE DEPARTMENT
6 Baboosic Lake Road Tel: 603-424-7075
Merrimack, NH 03054
C. All chemical contact areas of the feeder including the double augers, seal assembly and
discharge cylinder shall be constructed of 304 stainless steel. Minimum sheet metal
thickness shall be 11 gauge and all welds shall be continuous.
D. The feeder shall have a volumetric metering accuracy of +/- 1% (error) for free- flowing
chemicals and a maximum of +/- 2% (error) for non-free flowing chemicals based on a
given number of consecutive one-minute samples.
E. The feeder screw and tube shall extend a minimum of 24" beyond the feeder housing
3. STORAGE HOPPER
A. The feeder shall be supplied with an integral supply hopper to provide 5 cubic feet of
storage capacity. The hopper shall be constructed of 11 gauge 304 stainless steel.
B. The feeder/hopper assembly shall be placed on a mild steel frame base capable of
supporting the feeder and its accessories. The base shall be supplied by the feeder
manufacturer and finished same as the feeder.
4. HOPPER VIBRATOR
A. The manufacturer of the storage hopper shall furnish, mounted on the hopper, a suitable
electrical vibrator to prevent arching or bridging of the chemical. A vibrator controller
and cycle timer shall be provided in the local control panel.
5. HOPPER LEVEL PROBE
A. The storage hopper shall be equipped with a paddle-type low-level probe.
6. CONTROLS
A. Local controls Hand, Off Auto installed in a NEMA 4X Enclosure, unit Capable of remote
control 4-20 ma analog signal through a PLC to SCADA Computer
B. The control panel shall include the following functions, switches and statuses:
1. Feeder Hand/Off/Auto Switch - When the feeder and is in the auto position, a local or
remote start signal shall after a delay of a few seconds, start the feeder. Upon a stop
signal, the feeder shall stop immediately.

TOWN OF MERRIMACK, NEW HAMPSHIRE
TOWN _______________________________________________
FINANCE DEPARTMENT
6 Baboosic Lake Road Tel: 603-424-7075
Merrimack, NH 03054
2. Feeder Running Light
3. Feeder Alarm Light
4. Vibrator Hand/Off/Auto Switch - In auto, vibrator will cycle on and off for preset
times. The timer shall be sized to ensure effective hopper agitation without compaction
of the material.
5. Vibrator Running Light
6. Hopper Low Level Alarm Light
7. Dry Contacts as required
PART 3 - EXECUTION
1. INSTALLATION
A. The system will be installed by the Town in strict conformance with the manufacturer's
installation instructions. The manufacturer's field service personnel shall perform checkout
of final installation, start-up, and instruction of operating personnel.
2. TRAINING
A. The equipment manufacturer shall provide one trip, up to two (2) days total of start-up and
operator training.
3. WARRANTY
A. The warranty for the equipment shall be for a period of three (3) years from the date of the
manufacturer's certification, start-up and training.

TOWN OF MERRIMACK, NEW HAMPSHIRE
TOWN _______________________________________________
FINANCE DEPARTMENT
6 Baboosic Lake Road Tel: 603-424-7075
Merrimack, NH 03054
Bid for Dry Chemical Feeder
Bid Form
Due by 2:00PM on Monday, October 19, 2026
One Complete Factory-Assembled American Made Dry Chemical
Feed System according to the Town's bid specifications $____________
*Delivery cost shall be included in the total price
One Complete Factory-Assembled American Made Dry Chemical
Feed System according to the Town's bid specifications $____________
*Delivery cost shall be included in the total price
Delivery will be made within ____ calendar days after receipt of the Town's related purchase
order.
The above bid is provided in accordance with the Town's bid invitation dated September 29, 2026,
except as indicated below:
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
Bidder: _______________________________________________________________________
Street Address: _________________________________________________________________
City, State, Zip Code: ____________________________________________________________
Phone No: ______________________________ Fax No: _______________________________
E-Mail:_______________________________________________________________________
Authorized Signature: ___________________________________________________________
Printed Name: _________________________________________Date:____________________