Milton Roy mRoy A User Manual (English)

Other manuals for Milton Roy mRoy A

Actuator Capacity Control Manual33 pages

Installation, Operation And Maintenance Manual72 pages

Questions and Answers:

R
rlucasAug 16, 2025
Why Milton Roy mRoy A motor won't operate?
- A
  Alexis RivasAug 16, 2025
  The Milton Roy Water Pump motor might not be operating due to several reasons: * There's no power. In this case supply correct power in accordance with motor nameplate. * The fuse is blown. Check for a short circuit or overload. * The thermal overload device in the starter is open. Reset the overload. * There is a broken wire. Locate and repair it. * The voltage is low. Check for wiring that is too thin. * The liquid level is low (if a low-level cutoff is used). Fill the tank. * The oil is frozen in the pump. Thaw it out. * The motor is bad and needs replacement.
L
Lori JenkinsAug 22, 2025
What to do if Milton Roy Water Pump delivers erratically?
- D
  dean32Aug 22, 2025
  If your Milton Roy Water Pump is delivering erratically, here are some potential causes and solutions: * **Leaky suction line:** Repair or replace the piping. * **Worn or dirty valves or seats:** Clean or replace the cartridges. * **Excessive excursion of ball valves from seats (indicated by ball chatter):** Replace the cartridges. * **Insufficient suction pressure:** Increase suction pressure by raising the tank level or pressurizing the suction tank. * **Liquid too close to boiling point:** Reduce the temperature or raise the suction pressure. * **Leaky system relief valve:** Repair or replace the relief valve.
B
bglennAug 25, 2025
How to fix Milton Roy mRoy A motor that overheats thermal overload switches?
- S
  Sara FloresAug 25, 2025
  If the motor of your Milton Roy Water Pump is overheating the thermal overload switches, it could be due to: * A power supply that doesn't match the motor characteristics. Check the power supply against the motor nameplate data. * An overload caused by operating the pump above its discharge pressure. Check the operating pressure against the pump manufacturer’s data plate maximum rating and correct the cause of the pressure abnormality.
D
Dakota MitchellAug 27, 2025
What causes improper oil level in Milton Roy mRoy A Water Pump reservoir to increase and overflow?
- J
  Julie WellsAug 27, 2025
  The improper oil level in the Milton Roy Water Pump reservoir increases and overflows when the flexible diaphragm is punctured by foreign material. To fix this, replace the diaphragm.
J
John RhodesAug 30, 2025
Why Milton Roy mRoy A Water Pump delivery is not adjustable?
- V
  Vincent WilliamsAug 30, 2025
  The delivery of your Milton Roy Water Pump might not be adjustable because the system pressure is too low. To resolve this, install a back pressure valve in the discharge line (preferred method), or install a back pressure spring (provided) into the discharge cartridge.
J
johnsonkennethSep 2, 2025
What to do if the ACC on my Milton Roy mRoy A Water Pump always moves to the same position?
- A
  Adam MartinSep 2, 2025
  If the ACC moves to the same position regardless of the signal applied, the issue could be due to an improper command signal or an incorrect mode setup. First, connect a mA meter into the signal line to read the signal. If necessary, correct the signal source, as there may be a broken wire or loose connection. If the signal is correct, review the initial start-up procedure to ensure the mode setup is correct.
S
Shawn HarrisSep 5, 2025
What to do if my Milton Roy mRoy A Water Pump is making a pounding noise at high discharge pressure?
- M
  mauricecoxSep 5, 2025
  The pounding noise at high discharge pressure in the drive casing is due to fluid compressibility causing a reversal load on the gears at the end of the pressure stroke. This is not considered detrimental, so no action is needed.
P
Paul NormanSep 7, 2025
Why does my Milton Roy mRoy A Water Pump motor overheat and trigger thermal overload switches?
- A
  Alicia BenjaminSep 7, 2025
  The motor overheats and triggers thermal overload switches for the following reasons: the power supply does not match the motor characteristics, so you should check the power supply against the motor nameplate data. Another reason might be overload caused by operating the pump above its discharge pressure, so you should check the operating pressure against the pump manufacturer’s data plate max. rating and correct the cause of the pressure abnormality.
M
Mrs. Anna BellSep 9, 2025
What to do if my Milton Roy mRoy A Water Pump delivery is not adjustable?
- D
  daniel56Sep 10, 2025
  If your Milton Roy Water Pump delivery is not adjustable, consider the following: the flexible diaphragm may be punctured by foreign material, requiring you to replace the diaphragm; the O-rings on the control spool may be nicked, requiring you to replace the O-rings (note: you must use a special tool).

Milton Roy mRoy A Specifications

General

Brand	Milton Roy
Model	mRoy A
Category	Water Pump
Language	English

Summary

PRECAUTIONS

Protective Clothing

Wear OSHA-approved protective clothing, face shield, safety glasses, and gloves.

Hearing Protection

Recommended if sound level (TWA) exceeds 85 dbA.

Electrical Safety (Lock-out / Tag-out)

Ensure power is off, connect pump to earth, use proper fuses.

Liquid Compatibility

Verify wetted component materials for solution compatibility.

Pumps Water “Primed”

Flush pump head if process solution differs from factory test water.

Plumbing and Electrical Connections

Adhere to local plumbing and electrical codes for connections.

Line Depressurization

Depressurize suction and discharge lines before servicing for chemical contact reduction.

Over Pressure Protection

Install safety/pressure relief valve to protect system components from damage.

Lifting Procedures

SECTION 1 - GENERAL DESCRIPTION

1.1 INTRODUCTION

Overview of the mRoy pump as a controlled volume diaphragm pump.

1.2 GENERAL INFORMATION

Details pump capacity adjustability, accuracy, and application limits.

1.3 PUMP CHARACTERISTICS

Guidance on identifying pump model and product code.

1.4 PUMP PERFORMANCE

Refers to performance charts and derating tables for mRoy A & B pumps.

1.5 PRINCIPLE OF OPERATION

Explains the four basic components and operation of the mRoy pump.

Accuracy Specifications

Pump accuracy specification of ±1% steady state over 10:1 turndown.

Drive System

Hydraulic bypass design allows 0-100% capacity adjustment while running or stopped.

Liquid End Features

Features high-performance check valves for efficient operation.

Diaphragm Details

Hydraulically actuated diaphragm offers long service life compared to mechanical types.

Capacity Control Options

Options include Micrometer (standard), Electronic (4-20 mA), and Pneumatic (3-15 psi).

mRoy Series Capacity/Pressure Selection

Metallic Liquid Ends

Tables showing capacity and pressure ratings for metallic liquid ends.

Plastic Liquid Ends

Tables showing capacity and pressure ratings for plastic liquid ends.

mRoy Pump Flow Derating

SECTION 2 - INSTALLATION

2.1 UNPACKING/INSPECTION

Procedures for checking shipment for damage and verifying contents against packing list.

2.2 STORAGE GUIDELINES

Guidelines for short-term and long-term storage to prevent corrosion.

Pump Drive Preparation

Instructions for preparing pump drive components for storage.

Electrical Equipment Preparation

Steps for preparing electrical equipment, including motors, for storage.

2.3 SAFETY PRECAUTIONS

General safety guidelines for installation, operation, and maintenance.

2.4 PUMP MOUNTING & LIFTING/LOCATION

Mounting surfaces, lifting procedures, and location considerations for pump reliability.

2.5 OUTDOOR INSTALLATIONS

Recommendations for outdoor installation to protect against environmental extremes.

2.6 FLANGE MOUNTED MOTORS

Procedure for mounting customer-supplied flange motors to the pump.

2.7 ELECTRICAL CONNECTIONS

Checking electrical supply, motor rotation, and wiring.

2.8 MOTOR SPECIFICATIONS

Details on mRoy A & B motors, power, enclosure, and cooling considerations.

2.9 PUMP LUBRICATION

Instructions for filling and checking pump oil levels.

Recommended Oil Types

Lists AGMA and Zurn Oil Co. specifications for recommended lubricants.

Nominal Oil Capacity

Provides oil capacity for AGMA and Zurn Oil Co. lubricants.

2.10 PIPING GUIDELINES

General piping recommendations, support, flushing, and strainer installation.

Suction Piping Requirements

Guidelines for suction piping diameter, length, and NPSH requirements.

Discharge Piping Installation

Recommendations for discharge piping, safety valves, and minimum pressure.

2.11 OPERATION WITH SUCTION LIFT

Explains NPSH requirements and considerations for operation with suction lift.

SECTION 3 - OPERATION

3.1 INITIAL START-UP

Steps for initial pump start-up, including torque checks and priming.

Priming Procedures

Detailed steps for priming the pump liquid end and bleeding air.

3.2 RESETTING THE RELIEF VALVE

Procedure and explanation for resetting the internal relief valve.

Relief Valve Setting Adjustment

Steps to adjust the relief valve to the desired working pressure.

3.3 ROUTINE OPERATION

Routine checks for satisfactory pump operation and leak inspection.

SECTION 4 - MAINTENANCE

4.1 SPARE PARTS

Recommended spare parts to maintain for pump support and availability.

4.2 RPM KIT COMPONENTS

Lists components included in Routine Preventive Maintenance (RPM) Kits.

4.3 RETURNING UNITS TO THE FACTORY

Procedure for returning pumps for repair, including RMA and SDS requirements.

4.4 ROUTINE MAINTENANCE

Regular checks and cleaning for optimal pump performance.

4.5 SEMI ANNUAL OIL CHANGE

Recommends draining and refilling pump oil twice a year.

4.6 CHECK VALVE CARTRIDGES

Recommendation for annual replacement and troubleshooting indicators.

4.7 DIAPHRAGM(S) REPLACEMENT

Recommendation for yearly diaphragm replacement and when to replace after head removal.

4.8 RELIEF VALVE POPPET

Recommendation for yearly replacement of the relief valve poppet.

4.9 CORRECTIVE MAINTENANCE

Procedures for fixing issues and replacing worn parts.

4.9.1 Check Valve Cartridge Replacement

Instructions for replacing check valve cartridges, with model-specific details.

4.9.1.1 Metallic Liquid Ends

Disassembly and reassembly steps for metallic liquid end check valves.

4.9.1.2 mRoy A Plastic, Current Design

Disassembly and reassembly for mRoy A plastic check valves.

4.9.1.3 mRoy B Plastic Liquid End

Disassembly and reassembly for mRoy B plastic check valves.

4.9.2 Relief Valve Poppet Replacement

Steps for removing and installing a new relief valve poppet.

4.9.3 Diaphragm Replacement

Disassembly and reassembly steps for diaphragm replacement.

4.9.4 Motor and Worm Replacement

Procedures for removing and replacing the motor and worm assembly.

4.9.5 Control Spool O-Rings Replacement

Steps for replacing O-rings on the control spool.

4.9.6 Worm Gear Replacement

Disassembly and reassembly procedures for the worm gear.

4.9.7 Connecting Rod and Plunger Replacement

Steps for replacing the connecting rod and plunger.

SECTION 5 - TROUBLESHOOTING GUIDE

Symptoms and Remedies

Lists common pump symptoms and their corresponding remedies for troubleshooting.

SECTION 6 - PARTS

6.1 GENERAL PARTS INFORMATION

Introduction to replaceable components and parts information.

6.2 ILLUSTRATED PARTS LIST

Explanation of columns and how to use the illustrated parts list.

Basic Parts List for Drive Models mRoy A

Detailed list of parts for mRoy A drive models with drawing location numbers.

Parts Common to Metallic Liquid End Models mRoy A

Parts list common to mRoy A metallic liquid end models.

Diaphragm Head Design - 8 Bolt E & F Liquid Ends

Parts list for mRoy A diaphragm head design E & F liquid ends.

Diaphragm Head Design - 8 Bolt C & D Liquid Ends

Parts list for mRoy mRoy C & D diaphragm head design.

High Viscosity Suction Check Valve Parts

Specific parts for the mRoy high viscosity suction check valve option.

mRoy A: E & F Plastic Liquid End Parts

Parts list for mRoy A E & F plastic liquid end models.

mRoy A Motor Mount Parts

List of parts for mRoy A motor mounts, including close coupled flange motors.

Electronic Capacity Control Mounting Parts

Parts list for electronic capacity control mounting assemblies.

Pneumatic Capacity Control Parts

Parts list for pneumatic capacity control systems.

Simplex Leak Detection Parts

Parts for simplex leak detection systems (Figure 22).

Double Diaphragm Parts E & F Plungers

Parts for double diaphragm E & F plunger liquid ends.

Basic Parts List for Drive Models mRoy B

Detailed list of parts for mRoy B drive models.

Liquid End mRoy K Parts

Parts list for mRoy K liquid ends.

Model mRoy B12 & M12 Plastic Liquid End Parts

Parts list for mRoy B12 & M12 plastic liquid ends.

mRoy B Motor Mounts Parts

Details on motor mounts for mRoy B models.

Simplex Leak Detection Parts - Gauge & NEMA Switch

Parts for simplex leak detection with gauge and NEMA switch (Figure 25).

Double Diaphragm Parts for Metallic Liquid End

Parts for double diaphragm metallic liquid ends (Figure 26).

Double Diaphragm Parts - Conductivity Probe Plastic Liquid End

Parts for double diaphragm plastic liquid ends with conductivity probe.

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