IMOVILLI M25 - User Manual

Imovilli Pompe S.r.l.
Reggio Emilia – Italy
www.imovillipompe.it
Manuale d’officina – Pompe a membrana 1/11
WORKSHOP MANUAL
DIAPHRAGM PUMPS
1.0 A-M VALVE ZONE CONTROL on pumps with internal manifolds
(M25 – M29 – M30 – M35 – M 50 – M60 – M73 – M104S – M135S)
1.1 Remove the valve covers and remove the A-M valves
from the cylinder head
NOTE: The suffix A-M means "Suction / Delivery"; in
fact, the pump valves can be used indifferently in
suction and delivery
1.2 Break down the valves into the individual elements and
proceed with their inspection; if a component is
particularly worn or damaged they will need to be
replaced.
1.3 Check the inside of the valve covers: if they show signs
of wear in the contact areas with the valve caps or
damage in the plasticization, they must be replaced.

Summary

1.0 A-M Valve Zone Control (Internal Manifolds)

Remove Valve Covers and A-M Valves

Remove the valve covers and the A-M valves from the cylinder head.

Valve Disassembly and Inspection

Break down valves into individual elements for inspection.

Valve Cover Inspection

2.0 Tested Control in the A-M Valve Zone

Support Surface Check for Valve Sag

O-Ring Diameter Check for Abrasions

3.0 Reassembly

O-Ring Gasket Replacement and Lubrication

Tighten Valve Covers

4.0 A-M Valve Zone Control (External Manifolds)

Manifold Removal and Valve Extraction

Inspection Procedure

5.0 Reassembly

O-Ring Gasket Replacement

A-M Valve Repositioning

6.0 Diaphragm Control and Replacement

Diaphragm Removal and Condition Checks

Remove diaphragms and inspect for swelling, cuts, or piston contact.

7.0 Cylinder Control

Cylinder Scratch Inspection

Shaft and Bearing Service

Shaft Removal

Through Shaft Procedures and Disassembly

Pump Shaft Condition Control

Reassembly and Initial Startup

Reassembly Steps

Air Bleeding Procedure

Bleed air from the pump after reassembly and oil filling.

Post-Maintenance Startup and Air Bleeding

Initial Startup and Progressive Operation

Start with pressure canceled, gradually increase speed/pressure, cycle pump.

Final Checks and Stable Operation

Repeat procedures, monitor pressure/vibrations for stable pump noise.

IMOVILLI M25 Specifications

General

Pressure	1.5 bar
Power	0.37 kW
Max Head	15 m
Voltage	220-240V
Frequency	50 Hz
Inlet/Outlet Size	1 inch
Flow	25 m³/h
Max Flow Rate	25 m³/h