Coupling M71 for rotary pump, ref. ROEU-COUPLING-M71

Overview

This accouplement M71 (ref. ROEU-COUPLING-M71) provides the mechanical coupling between the electric motor and the RO rotary pump body. An essential motor-to-pump assembly part, it ensures alignment and torque transmission. Choose it according to the motor flange size (M71 or M80). Without a suitable coupling and adapter, the motor can neither align nor transmit torque correctly to the pump: this part therefore governs the reliability, quiet running and service life of the complete motor-pump assembly.

Operation & performance

The adapter and coupling form the standardised interface (M71/M80) between motor and pump: they ensure shaft alignment, torque transmission and safe assembly. Use the size matching your motor flange.

Installation & maintenance

Mount the pump on a stable support, couple it to the suitable motor, respect the rotation direction and connect suction/discharge (BSPT/NPT by model). Check tightness, avoid dry running and ensure alignment. Periodic maintenance (vanes, seals, coupling) extends service life; wear parts are available in the catalogue.

Materials & options

Body available in brass, bronze or stainless (AISI 303/304) by required corrosion resistance. Threaded BSPT or NPT connection. Flows from 150 to 1000 L/h. Single- or three-phase motors (300 W to 1 HP) and M71/M80 adapters/couplings complete the range.

Safety & good practice

Protect the pump against dry running and overcurrent (motor thermal protection recommended). Filter the water upstream to preserve the vanes and body, bleed the air at commissioning and regularly check tightness and running noise. Respect the indicated voltage and frequency and connect the motor earth.

Compatibility & assembly

The pump, motor and coupling form one assembly: check the flange match (M71/M80), the rotation direction and the supply type (single/three-phase) before mounting. Flows range from 150 to 1000 L/h; pair the pump with the correctly rated motor and the matching coupling for reliable, quiet operation. When in doubt about the flange size or power, our team confirms the right combination for your setup.

Applications

These rotary pumps and their motors equip RO units, boosters and small water-treatment installations (residential, commercial, light industry, agriculture). They feed reverse-osmosis membranes, provide circuit boosting and dosing, with stable flow and compact mounting.

Choosing right

Choose the flow (150 to 1000 L/h), the body material (brass, bronze, stainless by corrosion) and the motor (single/three-phase, power) to suit your installation. Don’t forget the adapter and coupling matching the motor flange (M71/M80). The DIMM team helps you size the pump + motor assembly.

Key specifications

DIMM service & support

DIMM distributes the RO rotary pumps (150 to 1000 L/h, brass/bronze/stainless body), their single- and three-phase motors and the M71/M80 adapters/couplings, plus wear parts. Our teams advise on the pump + motor choice by your flow and pressure, handle assembly and supply consumables. Every item is identified by its article code for reliable ordering and easy re-supply.

Warranty & re-supply

Product distributed by DIMM and identified by its Business Central article code for reliable ordering. It carries the manufacturer’s warranty; motors, adapters, couplings and wear parts remain available in the catalogue throughout its service life.