Flowserve MARK 3 GROUP 4 User Manual

Page 6

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MARK 3 GROUP 4 USER INSTRUCTIONS ENGLISH 71569286 08-12

Page 6 of

48

flowserve.com

®

HAZARDOUS LIQUIDS

When the pump is handling hazardous liquids care

must be taken to avoid exposure to the liquid by

appropriate sitting of the pump, limiting personnel

access and by operator training. If the liquid is

flammable and/or explosive, strict safety procedures

must be applied.

Gland packing must not be used when pumping

hazardous liquids.

PREVENT EXCESSIVE EXTERNAL

PIPE LOAD

Do not use pump as a support for piping. Do not mount

expansion joints, unless allowed by Flowserve in

writing, so that their force, due to internal pressure, acts

on the pump flange.

NEVER RUN THE PUMP DRY

ENSURE CORRECT LUBRICATION

(See section 5,

Commissioning, start-up, operation and

shutdown

.)

START THE PUMP WITH OUTLET

VALVE PART OPENED

(Unless otherwise instructed at a specific point in the

user instructions.)

This is recommended to minimize the risk of

overloading and damaging the pump or motor at full or

zero flow. Pumps may be started with the valve further

open only on installations where this situation cannot

occur. The pump outlet control valve may need to be

adjusted to comply with the duty following the run-up

process. (See section 5,

Commissioning start-up,

operation and shutdown

.)

INLET VALVES TO BE FULLY OPEN

WHEN PUMP IS RUNNING

Running the pump at zero flow or below the

recommended minimum flow continuously will cause

damage to the pump and mechanical seal.

DO NOT RUN THE PUMP AT

ABNORMALLY HIGH OR LOW FLOW RATES

Operating at a flow rate higher than normal or at a flow

rate with no back pressure on the pump may overload

the motor and cause cavitation. Low flow rates may

cause a reduction in pump/bearing life, overheating of

the pump, instability and cavitation/ vibration.

1.6.4

Products used in potentially explosive
atmospheres

Measures are required to:

Avoid excess temperature

Prevent build up of explosive mixtures

Prevent the generation of sparks

Prevent leakages

Maintain the pump to avoid hazard

The following instructions for pumps and pump units

when installed in potentially explosive atmospheres

must be followed to help ensure explosion protection.

For ATEX Both electrical and non-electrical equipment

must meet the requirements of European Directive

94/9/EC. Always observe the regional legal Ex

requirements eg Ex electrical items outside the EU may

be required certified to other than ATEX eg IECEx, UL.
1.6.4.1 Scope of compliance

Use equipment only in the zone for which it is

appropriate. Always check that the driver, drive coupling

assembly, seal and pump equipment are suitably rated

and/or certified for the classification of the specific

atmosphere in which they are to be installed.

Where Flowserve has supplied only the bare shaft

pump, the Ex rating applies only to the pump. The party

responsible for assembling the ATEX pump set shall

select the coupling, driver and any additional equipment,

with the necessary CE Certificate/ Declaration of

Conformity establishing it is suitable for the area in which

it is to be installed.

The output from a variable frequency drive (VFD) can

cause additional heating affects in the motor and so, for

pumps sets with a VFD, the ATEX Certification for the

motor must state that it is covers the situation where

electrical supply is from the VFD. This particular

requirement still applies even if the VFD is in a safe

area.

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