Lutz-Jesco MAGDOS LP, Руководство по эксплуатации

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Appropriate and intended use
Foreseeable misuse
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© Lutz-Jesco GmbH 2014
Subject to technical changes.
140327
Solenoid-Diaphragm Dosing Pump MAGDOS LP Operating Instructions
BA-10231-02-V03
3.6 Foreseeable misuse
Below, there is information about the applications of the dosing pump or
associated equipment that are not considered to be intended use. This
chapter is intended to allow you to detect possible misuse in advance
and to avoid it.
Foreseeable misuse is assigned to the individual stages of the product
lifetime:
3.6.1 Faulty assembly

Unstable or unsuitable bracket

Dosing pump bolted wrongly or loosely
3.6.2 Faulty hydraulic installation

Suction and pressure lines dimensioned incorrectly

Unsuitable connection of the pipes due to wrong material or unsuit-
able connections.

Suction and pressure lines mixed-up

Damage to threads due to them being tightened too much

Bending of pipelines

No free return flow of the pressure relief valve

Excessive demand due to the pressure differences between the
suction and discharge valves

Through-suction at installation without back-pressure valves

Damage due to undamped acceleration mass forces

Exceeding the admissible pressure on the suction and discharge
sides

Using damaged parts
3.6.3 Faulty electrical installation

Connecting the mains voltage without a protective earth

Unsecured mains or one that does not conform to standards

Not possible to immediately or easily disconnect the power supply

Wrong connecing cables for mains voltage

Dosing pump accessories connected to wrong sockets

Diaphragm monitoring not connected or defective

Protective earth removed
3.6.4 Faulty commissioning

Commissioning with damaged plant

Shut-off valves closed at commissioning

Closed suction or pressure line, e.g. due to blockages

Personnel was not informed before commissioning

System was recommissioned after maintenance without all the
protective equipment and fixtures, etc. being reconnected.

Inadequate protective clothing or none at all
3.6.5 Faulty operation

Protective equipment not functioning correctly or dismantled

Modification of the dosing pump without authority

Ignoring operational disturbances

Elimination of operational disturbances by personnel without
adequate qualifications

Deposits in the dosing head due to inadequate purging, particularly
with suspensions

Bridging the external fuse

Operation made more difficult due to inadequate lighting or
machines that are difficult to access

Operation not possible due to dirty or illegible display of the dosing
pump

Delivery of dosing media for which the system is not designed

Delivery of particulate or contaminated dosing media

Inadequate protective clothing or none at all
3.6.6 Faulty maintenance

Carrying out maintenance during ongoing operation

Carrying out work that is not described in the operating instructions

No adequate or regular inspection of correct functioning

No replacement of damaged parts or cables with inadequate insula-
tion

No securing against reactivation during maintenance work

Using cleaning materials that can cause reactions with the dosing
media

Inadequate cleaning of the system

Unsuitable purging medium

Unsuitable cleaning materials

Cleaning materials left in system sections

Using unsuitable cleaning equipment

Using the wrong spares or lubricants

Contaminating the dosing medium with lubricant

Installing spares without following the instructions in the operating
manual

Blocking venting orifices

Pulling off sections of the plant

Contamination at installation without a dirt trap

Mixing up the valves

Mixing up the sensor lines

Not reconnecting all the lines

Damaging or not installing all the seals

Not renewing seals

Not paying attention to safety data sheets

Inadequate protective clothing or none at all
3.6.7 Faulty decommissioning

Not completely removing the dosing medium

Dismantling lines while the dosing pump is running

Device not disconnected from the power supply

Using the wrong dismantling tools

Inadequate protective clothing or none at all
3.6.8 Faulty disposal

Incorrect disposal of dosing media, operating resources and other
materials

No labelling of hazardous substances