Product Description; Applications; Working Limits - Espa Multi VX Manuel D'instructions

Table des Matières

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1. Overview

The purpose of this manual is to provide the necessary information for proper installation, operation and maintenance of the pumps/electric pumps. The

instructions and warnings provided below concern the standard version, as described in the sale documents. Special versions may be supplied with

supplementary instructions leaflets. Please refer to the sale contract for any modifications or special version characteristics. Always specify the exact

pump/electric pump type and identification code when requesting technical information or spare parts from our Sales and Service department. For

instructions, situations or events not considered in this manual or in the sale documents, please contact our Service Center nearest you.

Read this manual before installing and using the product.

Improper use may cause personal injury and damage to property, and lead to the forfeiture of the warranty coverage.

2. Product Description

The Multi VX range features vertical multistage non-self priming pumps, which can be coupled to standard electric motors.

All the metal parts that are in contact with the water are made of stainless steel. They are available in different versions according to the position of the suction

and delivery ports and the shape of the connection flanges (➜ section 11.2).

If you buy a pump without the electric motor, make sure that the motor you use is suitable for coupling to the pump.

The Multi VX pumps are equipped with a standard mechanical seal designed for easy replacement without having to disassemble the entire pump (➜ section

11.22).

3. Applications

These pumps are suitable for civil and industrial water distribution systems, irrigation (agriculture, sporting facilities), water treatment, boiler feed, parts

washing, cooling - air conditioning - refrigeration and firefighting applications.

3.1 Working Limits

3.1.1 How to Read the Pump's Rating Plate

3.1.1 How to Read the Pump

The drawings in section 11.1 show the essential data found on the rating plates.

3.1.2

3.1.2 Pumped Liquids, Pressures, Temperatures

Pumped Liquids, Pressures, Temperatures

3.1.2

Pumped Liquids, Pressures, Temperatures

This pump can be used to pump cold water, hot water, water with glycol.

The section 11.3 provides information regarding the gasket and mechanical seal materials (➜ section 11.3).

Do not use this pump/electric pump to handle flammable and/or explosive liquids.

Do not use this pump to handle liquids containing abrasive, solid or fibrous substances.

For special requirements, please contact our Sales and Service Department.

Maximum operating pressure: depending on the pump model and the temperature of the pumped liquid (➜ section 11.4).

Liquid temperature

- for the standard version (EPDM gaskets):

- for special version (FPM gaskets):

- for special version (PTFE gaskets):

- for household and similar purposes (EN 60335-2-41):

3.1.3 Suction

In case of negative suction head (negative pressure on suction side) make sure that the flow resistance in the suction pipe added to the suction lift (height

difference between the water source and the pump suction port) does not exceed the pump's suction capacity, as this could cause cavitation.

Do not use the pump if cavitation occurs, as its internal components could be damaged.

For additional information ➜ section 11.5.

Make sure that the sum of the pressure on the suction side (water system, gravity tank) and the maximum pressure delivered by the pump does not

exceed the maximum working pressure allowed (nominal pressure PN) for the pump.

For additional information ➜ section 11.4

If you pump hot water, you must guarantee a minimum pressure on the suction side to prevent the generation of stems.

For additional information ➜ section 11.8.

3.1.4 Minimum nominal flow rate

To prevent overheating of the internal pump components, make sure that a minimum water flow is always guaranteed when the pump is running.

Do not run the pump with the on-off valve shut on the delivery side for longer than a few seconds

For additional information ➜ section 11.9.