Description
LMI Milton Roy A141-352SI Electromagnetic Dosing Pump 120V 0.58 GPH 250 PSI
The LMI Milton Roy A141-352SI is a compact electromagnetic metering pump designed for precise chemical dosing in water treatment and chemical injection applications. It uses an electromagnetically driven diaphragm to deliver repeatable, adjustable flow with no rotating parts in the fluid path. Output is controlled via two front-panel dials — one for stroke length (volume per stroke) and one for stroke rate (strokes per minute) — allowing independent adjustment of flow rate across its operating range.
Specifications & What's Included
- Model: A141-352SI
- Manufacturer: LMI Milton Roy, Acton, MA USA
- Type: Electromagnetic Dosing / Metering Pump
- Max Flow Rate: 0.58 GPH
- Max Pressure: 250 PSI
- Input Voltage: 120 VAC
- Current Draw: 1.40 A
- Frequency: 50/60 Hz
- Controls: Stroke Length dial and Stroke Rate dial (front panel)
- Thread Type: NPT (inlet and outlet)
- Enclosure Rating: Enclosure 3 – Suitable for Outdoor Use
- Thermal Protection: Yes – Thermally Protected
- Certifications: UL Listed (File 7B42), cUL, NSF
- Includes: Pump with power cord and pump head fittings as shown
Applications
Electromagnetic metering pumps like the LMI Milton Roy A141-352SI are standard equipment in water treatment systems, used to inject chemicals such as chlorine, sodium hypochlorite, acids, antiscalants, and corrosion inhibitors into water lines at precise, controlled rates. The high maximum pressure rating of 250 PSI makes this model suited for injection into pressurized systems including municipal water, well water treatment, boiler feed, cooling tower treatment, and industrial process water. The NSF listing indicates it meets standards for use in potable water applications. LMI (Liquid Metronics Inc.), operating under the Milton Roy brand, has been a widely used name in chemical feed pump equipment for water and wastewater treatment facilities, swimming pools, and light industrial processes. The electromagnetic drive — with no cam, gears, or motor in the liquid path — reduces maintenance compared to motor-driven designs and allows precise low-flow dosing at high backpressure.
This LMI Milton Roy A141-352SI Electromagnetic Dosing Pump is in used condition and shows signs of previous service. The yellow housing has orange-brown staining and mineral deposit spotting across multiple surfaces, most visible on the pump head area and lower housing. The black plastic pump head manifold and check valve fittings show mineral buildup and discoloration consistent with chemical service use. The front panel controls (stroke length and stroke rate dials) are intact and the NSF and LMI branding labels are legible. The power cord is present. This pump has not been powered or tested at our facility, but it came out of a working environment where it was previously in use. Please view our photo set and contact us if you have any questions.
Warranty Information
Additional Information
Brand: |
LMI Milton Roy |
Model: |
A141-352SI |
MPN: |
A141-352SI |
Type: |
Electromagnetic Dosing Pump |
SKU: |
42858 |
Max Flow Rate: |
0.58 GPH |
Max Pressure: |
250 PSI |
Voltage: |
120 VAC |
Current: |
1.40 A |
Frequency: |
50/60 Hz |
Power Requirements: |
120 VAC, 1.40 A, 50/60 Hz |
Enclosure Rating: |
Enclosure 3 – Suitable for Outdoor Use |
Certifications: |
UL Listed (7B42), cUL, NSF |
Thermal Protection: |
Yes – Thermally Protected |
Thread Type: |
NPT |
Controls: |
Stroke Length and Stroke Rate Dials |
Application: |
Chemical Dosing, Water Treatment, Chemical Injection |
Country/Region of Manufacture: |
United States |
Seller Notes: |
Pump only — includes power cord and pump head fittings as shown |
Condition Notes: |
This LMI Milton Roy A141-352SI Electromagnetic Dosing Pump is in used condition with mineral deposit staining on the housing and pump head fittings from prior chemical service. Not tested at our facility; pulled from working use. Power cord included. |
California Prop 65 Warning: |
WARNING: This product can expose you to chemicals including lead and lead compounds, and DEHP (a phthalate), which are known to the State of California to cause cancer and birth defects or other reproductive harm. Go to P65Warnings.ca.gov |
