Calpeda NM Series - User Manual

Questions and Answers

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Michael RodriguezJul 28, 2025
Why is my Calpeda Water Pump motor not starting?
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  Thomas BridgesJul 28, 2025
  Several factors can prevent your Calpeda Water Pump motor from starting. It could be due to an unsuitable power supply, so verify that the mains frequency and voltage match the indicator plate. Check for incorrect electrical connections and ensure the thermal overload protection is correctly set. Blown or defective fuses, a blocked shaft, or a malfunctioning engine could also be the cause. Replace the fuses and remove any blockages.
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Anthony PerezAug 2, 2025
What to do if my Calpeda NM Water Pump has insufficient flow?
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  sarah78Aug 2, 2025
  If your Calpeda Water Pump has insufficient flow, several issues could be responsible. Ensure that the pipes and accessories are adequately sized for the application to avoid excessive head loss. Clean the rotor to remove any deposits or solid bodies blocking internal passages, and consider installing a suction filter. Check the rotor and pump casing for wear, replacing them if necessary. Also, verify the liquid's viscosity, the pump's rotation direction by inverting the electrical connections, and ensure the suction head and pipe length are appropriate.
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James VazquezAug 7, 2025
How to fix noise and vibrations from Calpeda Water Pump?
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  Mr. Alexander ChapmanAug 7, 2025
  Excessive noise and vibrations from your Calpeda Water Pump can stem from several causes. Start by checking for obstructions in the rotor. If the rotor is clear, inspect the bearings for wear and replace them if needed. Ensure that the pump and pipes are firmly attached and properly anchored. If the flow is too strong for the delivery pipe diameter, consider using larger diameter pipes or reducing the pump flow. Also, check the power supply voltage and the alignment of the pump-motor unit.
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Megan SawyerAug 12, 2025
What to do if my Calpeda Water Pump is blocked?
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  Clifford GarciaAug 12, 2025
  If your Calpeda Water Pump is blocked, it could be due to rust from prolonged inactivity or solid objects in the rotor. Try to rotate directly from the pump shaft or the joint, remembering to turn off the electricity supply first. If possible, dismantle the pump casing and remove any solid foreign bodies inside the rotor.
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Robin BarryAug 17, 2025
What to do if my Calpeda NM functions but no water comes out?
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  Jennifer KhanAug 17, 2025
  If your Calpeda Water Pump runs but doesn't pump water, check for air infiltration from suction tube connections, drain plugs, the pump filling point, or suction pipe gaskets and seal any leaks. Make sure the foot valve isn't blocked and that the suction pipe is fully immersed in the liquid. Also, inspect the suction filter for blockages and clean or replace it as needed.
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Hannah JacksonAug 22, 2025
Why is my Calpeda Water Pump leaking from the mechanical seal?
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  Penny HernandezAug 22, 2025
  Leakage from the mechanical seal of your Calpeda Water Pump may occur if the seal has run dry, stuck, or been scored by abrasive particles in the pumped liquid. In this case, install a suction filter and use a seal suited to the characteristics of the liquid being pumped. Also, ensure that the mechanical seal is appropriate for the application.

Summary

NM, NMD, C Pumps

Close Coupled Pumps with Threaded Ports

Describes close coupled pumps featuring threaded ports.

General Information

Symbols

Explains symbols used in the manual for safety and operation.

Manufacturer Name and Address

Details the manufacturer's contact information and website.

Authorized Operators

Warranty

Technical Assistance

Technical Description

Intended Use

Specifies the intended applications and liquid types for the pumps.

Improper Use

Details forbidden uses and consequences of improper operation.

Marking

Explains the information found on the pump's name-plate.

Technical Features

Technical Data

Lists performance data, voltage, frequency, and pressure limits.

Operating Conditions

Specifies ambient requirements and installation site conditions.

Safety

General Provisions

Essential safety indications and adherence to standards.

Safety Devices

Describes the safety features of the device's external case.

Residual Risks

States that the appliance has no residual risks when used correctly.

Information and Safety Signals

Notes the absence of specific signals on the product itself.

Individual Protection Devices

Recommends the use of PPE during installation and maintenance.

Transportation and Handling

Handling

Guidelines for careful handling, avoiding impacts and weight limits.

Installation

Dimensions

Refers to the technical catalogue for detailed dimensions.

Ambient Requirements and Installation Site Dimensions

Specifies site requirements and forbids explosive atmospheres.

Unpacking

Instructions for inspecting the device after unpacking and handling materials.

Installation

General installation procedures and pump placement.

Pipes

Guidance on pipe connection, diameter, and stress avoidance.

Suction Pipe

Details on suction pipe installation, airtightness, and components.

Delivery Pipe

Instructions for delivery pipe setup, valves, and pressure gauge.

Electrical Connection

Detailed instructions for safe electrical connection by qualified personnel.

Startup and Operation

Preliminary Checks Before Start-up

Essential checks before initiating pump operation.

First Starting

Step-by-step guide for the initial startup process.

Switch Off of the Pump

Instructions on how to safely turn off the pump.

Maintenance

Routine Maintenance

Steps for regular maintenance to ensure optimal performance.

Dismantling the System

Procedures for safely dismantling the pump system.

Dismantling the Pump

Specific steps for removing the pump components.

Disposal

Spare Parts

Spare-Parts Request

Details on what information to provide when ordering spare parts.

Designation of Parts

Troubleshooting

Motor Does Not Start

Diagnosing and resolving issues when the motor fails to start.

Pump Blocked

Troubleshooting steps for a pump that is seized or blocked.

Pump Functions But No Water Comes Out

Resolving issues where the pump runs but does not deliver water.

Insufficient Flow

Identifying causes and solutions for reduced water flow.

Noise and Vibrations

Addressing problems related to unusual noise and vibrations from the pump.

Leakage from the Mechanical Seal

Troubleshooting leaks originating from the mechanical seal.

Installation Examples

Drawing for Dismantling and Assembly

Declaration of Conformity

Calpeda NM Series Specifications

General

Material	Cast Iron
Seal Type	Mechanical seal
Pump Type	Centrifugal
Application	Water supply, Irrigation, Industrial processes
Maximum Operating Pressure	10 bar
Speed	2900 rpm