Warning Warning; Information For; Overview; Product Description - Lowara FHF-ATEX3 Series Operating Instructions Manual

Centrifugal pumps and electric pumps

Table of Contents

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1. Overview

This manual contains specific information regarding the ATEX versions, supplementing the data found in the manual for the FHF and

WARNING

SHF Pumps and Electric Pumps (code 001073145).

Read the manuals 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 FHF and SHF ATEX range includes horizontal single-impeller non-self-priming electric pumps, coupled to flameproof electric motors by a flexible coupling.

Only the FHF or SHF ATEX pump is available.

In the SHF series, all the metal parts that are in contact with the water are made of stainless steel.

In the FHF series, some of the metal parts in contact with the water are made of stainless steel, others are made of cast iron.

This pump/electric pump is suitable for use in environments with potentially explosive atmospheres, due to the presence of flammable

substances in the form of gas, vapour or mist.

3. Applications

3.1

Working Limits

3.1.1 How to Read the Rating Plate of the Pump and Electric Pump

The drawings in section 10.1 enable identification of the essential data found on the rating plate.

3.1.2 How to Read the ATEX Plate of the Pump and Electric Pump

The drawings in section 10.2 enable identification of the essential data found on the rating plates.

3.1.3 Pumped Liquids, Pressures, Temperatures

These pumps/electric pumps are suitable for pumping hot and cold potable water and water-glycol mixtures.

WARNING

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

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

Observe the working limits specified in the product's rating plates.

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

Maximum operating pressure:

for SHF and FHF ranges

NB. The value varies depending on the temperature of the pumped liquid (➜ section 10.3).

Liquid temperature

- for version with NBR seals :

- for version with EPDM seals :

- for version with FPM seals :

For additional information ➜ section 10.3.

3.1.4 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 dif-

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

Make sure that the pump is always filled with water.

Do not use the pump if cavitation occurs, as its internal components could be damaged and become potential sources of fire.

For additional information ➜ section 10.4.

Make sure that the sum of the pressure on the suction side (water system, gravity tank) and the maximum pressure delivered by the

WARNING

pump does not exceed the maximum working pressure allowed (nominal pressure PN) for the pump.

For additional information ➜ section 10.5

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

WARNING

For additional information ➜ section 10.6.

3.1.5 Minimum Nominal Flow Rate