Overview
The Milton Roy LMI AA971-353SI is a microprocessor-controlled electromagnetic dosing pump engineered for precise liquid metering in industrial chemical treatment and process control systems. This pump combines reliable PVDF/TFE construction with electronic flow control to maintain tight accuracy across varying pressure conditions, making it a trusted choice for facilities requiring consistent chemical dosing over extended service intervals.
Key Features
- Microprocessor-controlled electromagnetic operation for precise flow regulation
- PVDF/TFE head and TFE diaphragm construction resists corrosive chemicals
- Ball check internal design ensures consistent, pulsation-free discharge
- 4FV solenoid valve configuration for reliable on-off control
- Compact footprint suitable for retrofit and space-constrained installations
Technical Specifications
- Model Number: AA971-353SI
- Flow Rate: 0.42 GPM (1.6 LPM)
- Maximum Pressure: 140 PSI (9.7 bar)
- Input Voltage: 120 V AC, 50/60 Hz
- Current Draw: 1.40 Amp
- Pump Head Material: PVDF (polyvinylidene fluoride)
- Diaphragm Material: TFE (Teflon®)
- Internal Valve Type: Ball check with 4FV solenoid
- Condition: New in Box
- Series: LMI (Liquid Metronics)
Typical Applications
Milton Roy LMI pumps are widely deployed in water treatment facilities for chlorine and biocide injection, cooling tower chemical treatment, boiler water treatment, and pharmaceutical/food processing operations requiring precise additive control. The AA971-353SI’s low-flow, high-pressure combination makes it ideal for point-of-use chemical metering where space is limited and regulatory compliance demands documented flow accuracy.
Compatibility & Replacements
Compatible With
- Standard 120V AC industrial control systems
- Chemical treatment monitoring and control panels
- Water treatment and HVAC automation systems
- Flow-paced and time-paced dosing protocols
Replaces / Drop-In Replacement For
- Milton Roy AA971-353SM (similar flow rate, alternate solenoid configuration)
- Milton Roy AA971-353SN (similar flow rate, alternate solenoid configuration)
- Milton Roy AA971-353SU (alternate control module variant)
Works With
- Milton Roy liquid metering control modules and timers
- Standard industrial 120V AC power distribution
- Chemical treatment sensor networks and PLCs (via external relay logic)
- Corrosive chemical supplies (PVDF/TFE compatible with most industrial chemicals)
