moyno A4015A, A4050A, A4190A, A2400A, A4100A Service Manual

Max. Pressure 300 PSI, 20 bar

Section:

METERING/DOSING PUMP

Page: 1 of 5
Date: July 2009

SERVICE MANUAL

METERING/DOSING PUMP

BARE SHAFT

A4015A, A4050A, A4100A, AND A4190A, A2400A, and A4400A MODELS

DESIGN FEATURES

Suction Housing: Stainless steel
Bearing Housing: Cast iron
Pump Rotor: Chrome plated, 300 series stainless steel
Pump Stator: Nitrile, EPDM, Fluoroelastomer
Shaft: 300 series stainless steel
Bearings: Prelubricated, fully sealed ball bearings
Seal: Single or double mechanical seals, packing
Flexible Joint: Prelubricated and sealed

INSTALLATION

Mounting. Provide the proper alignment between the pump

and drive by mounting both to a common flat base. Pump may
be mounted in any position. When mounting vertically, it is
necessary to keep bearings above seals to prevent possible
seal leakage into bearings. Loosen screws on body support
and stator support to rotate pump to desired position.

Pre-Wetting. Prior to connecting pump, wet pump elements
and mechanical seal or packing by adding fluid to be pumped
into suction port. Turn shaft over several times in a clockwise
direction when viewed from the shaft end to work fluid into
pump elements.

Piping. Piping to pump should be self-supporting to avoid
excessive strain on pump housings. The suction port is 1-1/2"
NPT and the discharge port is 1-1/4" NPT. Use pipe “dope” or
tape to facilitate disassembly and to provide seal.

Drive. On belt driven units, adjust belt tension to point of non­slip. Do not overtighten.

On direct drive units, coupling components should be aligned
and spaced at least 1/16" apart.

– Pump rotation must be clockwise when facing shaft. –

Check direction of rotation before startup.

– Maximum speed is 1750 rpm.

OPERATION

Self-Priming. With wetted pumping elements, the mechanical

seal model pump is capable of 15 feet of suction lift when
operating at 1750 rpm with pipe size equal to port size.

DO NOT RUN DRY. Unit depends on liquid pumped for
lubrication. For proper lubrication, flow rate should be at least
10% of rated capacity.

Storage. Always drain pump for extended storage periods
using pipe plug in suction housing.

Pressure Limits. See Table 1 for maximum discharge
pressure of each model.

Table 1

Temperature Limits. Unit is capable for service at 10°F to

210°F with nitrile, and to 260°F with EPDM, and 350°F with
fluoroelastomer. Note: an undersize rotor may be required for
elevated temperature applications.

TROUBLESHOOTING

WARNING: Before making adjustments, disconnect power

Failure to Pump.

1. Belt or coupling slip: Adjust belt tension or tighten set screw
on coupling.

2. Wrong rotation: Rotation must be clockwise when facing
shaft.

3. Excessive suction lift, vacuum or obstruction in suction
piping.

4. Flexible joint broken; possible excessive pressure: Replace
joint, check pressure at discharge port.

Will Not Start.

1. Insufficient horsepower: Check motor starting torque for
minimum model starting torque given on performance
curves.

2. Low voltage: Check power supply.

Models

4015
4050
4100
4190
2400
4400

source and thoroughly bleed pressure from
system. Failure to do so could result in
electric shock or serious bodily harm.

Max. Pressure 300 PSI, 20 bar
Max. Pressure 300 PSI, 20 bar
Max. Pressure 300 PSI, 20 bar
Max. Pressure 300 PSI, 20 bar
Max. Pressure 175 PSI, 12 bar