Calpeda MXV-B, MXV, MXVL, MXVL4, MXV4

Questions and Answers

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torresjessicaAug 5, 2025
How to troubleshoot a Calpeda MXV-B, MXV, MXVL, MXVL4, MXV4 Water Pump when the motor does not start?
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  Susan BarrettAug 5, 2025
  If the Calpeda Water Pump motor doesn't start, first ensure the mains frequency and voltage match the indicator plate's electrical characteristics. Then, verify the power supply cable is correctly connected to the terminal board and the thermal overload protection is properly set. Also, check if the engine overload protective device has activated. If fuses are blown or defective, replace them after inspecting the power supply and the items mentioned earlier. If the shaft is blocked, remove the blockage. If none of these steps work, the engine may be malfunctioning, and you should seek repair or replacement from an authorized service center.
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Stephanie KennedyAug 10, 2025
Why is there insufficient flow from my Calpeda MXV-B, MXV, MXVL, MXVL4, MXV4 Water Pump?
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  Chris MurphyAug 11, 2025
  If your Calpeda Water Pump has insufficient flow, check that the pipes and accessories aren't too small, causing excessive head loss. Clean the rotor to remove any deposits or solid bodies in its internal passages, and install a suction filter to prevent future blockages. If the rotor is deteriorated or worn, along with the pump case, replace them. Ensure the liquid's viscosity isn't too high and that the pump's rotation is correct by inverting the electrical connections if needed. Reduce the suction head if it's excessive and shorten the suction pipe or use a wider one if it's too long.
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danakellerAug 16, 2025
How to reduce noise and vibrations from a Calpeda Water Pump?
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  sandovalheatherAug 16, 2025
  If your Calpeda Water Pump is exhibiting noise and vibrations, start by checking the rotor for obstructions. Replace worn bearings and ensure the pump and pipes are firmly attached. If the flow is too strong for the delivery pipe's diameter, use larger pipes or reduce the pump flow. Reduce the flow by adjusting the feeder gate and/or using pipes with a bigger internal diameter. Verify the mains voltage is correct and realign the pump-motor unit if necessary.
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Jennifer JohnstonAug 23, 2025
What to do if my Calpeda MXV-B, MXV, MXVL, MXVL4, MXV4 functions but no water comes out?
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  Justin HallAug 23, 2025
  If your Calpeda Water Pump is running but no water is coming out, check for air infiltration from suction tube connections, drain plugs, the pump filling point, or suction pipe gaskets and seal any leaks. Ensure the foot valve isn't blocked and the suction pipe is fully immersed in the liquid. Also, inspect the suction filter for blockages and clean or replace it if needed.
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moniquehoustonAug 29, 2025
Why is my Calpeda Water Pump leaking from the mechanical seal?
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  Sarah ScottAug 29, 2025
  If the mechanical seal on your Calpeda Water Pump is leaking, ensure the pump casing and suction pipe are full of liquid and all air is expelled. If the seal is scored by abrasive parts, install a suction filter and use a seal suited to the liquid. If the seal is unsuitable for the application, choose one with appropriate characteristics. If there's just a slight initial drip, wait for the seal to adjust.

Summary

General Information

Symbols

Explains symbols used in the manual for warnings, information, and operational guidance.

Manufacturer Name and Address

Provides the official name and location of the pump manufacturer, Calpeda S.p.A.

Authorized Operators

Defines who is permitted to operate and maintain the pump, specifying end-users and technicians.

Warranty

Outlines the terms, conditions, and limitations of the product warranty.

Technical Assistance

Directs users on how to obtain further technical information, documentation, or spare parts.

Technical Description

Intended Use

Specifies the types of liquids and operating temperature range for which the pump is designed.

Improper Use

Details forbidden applications and clarifies the manufacturer's non-liability for misuse.

Marking

Describes the information found on the pump's external name-plate, including example diagrams.

Technical Features

Technical Data

Lists key specifications like nominal speed, protection rating, voltage, power, sound pressure, and starts per hour.

Operating Conditions

Specifies the required ambient conditions and installation site requirements for optimal pump performance.

Safety

General Provisions

Emphasizes reading all safety instructions and complying with applicable standards and laws.

Safety Devices

Mentions the external case designed to prevent contact with internal moving parts.

Residual Risks

States that the pump, when used correctly, has no residual risks.

Information and Safety Signals

Notes that this product type does not typically feature specific on-product signals.

Individual Protection Devices

Recommends the use of personal protective equipment (PPE) during installation, starting, and maintenance.

Transportation and Handling

Handling

Provides guidelines for careful handling, avoiding impacts, and lifting procedures for packages exceeding 25 kg.

Installation

Dimensions

Refers users to the technical catalogue for detailed pump dimensions.

Ambient Requirements and Installation Site Dimensions

Details site preparation, ventilation needs, and prohibitions on explosive environments.

Unpacking

Instructs on inspecting the pump for transport damage and proper disposal of packaging materials.

Installation

Covers vertical and horizontal installation requirements, including base mounting and support feet.

Connecting the Motor

Guides on securely connecting the electric motor to the pump, including shaft alignment and lubrication.

Horizontal Installation

Details specific steps for mounting the pump horizontally, including support feet attachment and leveling.

Pipes

Provides essential advice on pipe sizing, securing, and connecting to prevent stress and ensure proper flow.

Suction Pipe

Explains the correct setup for suction pipes, including foot valves, strainers, and airtightness.

Delivery Pipe

Covers installation of delivery pipes, including gate valves, pressure gauges, and check valves.

Electrical Connection

Outlines essential safety and procedural steps for electrical hook-up by a qualified electrician.

Startup and Operation

Preliminary Checks Before Startup

Lists critical checks to perform on the pump and coupling before initial operation.

Filling

Details the necessary steps for priming the pump with liquid before starting, including air venting.

Starting and Checking Operations

Guides on the correct sequence for starting the pump and verifying its performance and operation.

Switch Off of the Pump

Explains the procedure for safely shutting down the pump by disconnecting the power supply.

Maintenance

Routine Maintenance

Covers regular checks, cleaning, and inspection of the pump for optimal performance and early detection of issues.

Dismantling the System

Describes the initial steps required to prepare the pump for dismantling, such as closing valves and draining.

Dismantling the Pump

Provides detailed, step-by-step instructions for disassembling the pump and its components.

Replacing the Mechanical Seal

Guides on the correct procedure for replacing the mechanical seal, ensuring proper installation.

Replacing the Ball Bearing

Explains how to select and replace ball bearings based on motor size and type.

First-Stage Bearing and Intermediate Bearing

Details the types and locations of specific bearings within the pump stages.

Remounting

Tightening Torque

Specifies the correct torque values for various fasteners during reassembly to ensure proper sealing and function.

Axial Position of the Pump Rotor

Describes the method for correctly positioning and locking the pump rotor shaft during reassembly.

Disposal

Spare Parts

Spare-Parts Request

Instructs on the necessary information to provide when ordering replacement parts for the pump.

Troubleshooting

The Motor Does Not Start

Lists common causes and solutions for a pump motor failing to start.

Pump Blocked

Identifies reasons for the pump becoming blocked and provides remedies.

The Pump Functions but No Water Comes Out

Addresses issues causing the pump to run without delivering water, such as air leaks or blocked suction.

Insufficient Flow

Explains causes for reduced flow rate and offers corrective actions.

Noise and Vibrations from the Pump

Provides potential causes and solutions for excessive noise or vibration during pump operation.

Leakage from the Mechanical Seal

Details reasons for mechanical seal leaks and steps for repair or replacement.

Calpeda MXV-B, MXV, MXVL, MXVL4, MXV4 Specifications

General

Pump shaft	Stainless steel
Applications	Water supply, pressure boosting, irrigation
Motor	Single-phase or three-phase asynchronous motor
Insulation Class	Class F
Frequency	50 Hz / 60 Hz
Seal Type	Mechanical seal