Flowserve MP1 Sier-Bath - Manual (Page 6)

MP1 USER INSTRUCTIONS ENGLISH 26999958 – 10-12
Page 6 of 48 flowserve.com
may need to be adjusted to comply with the duty
following the run-up process.
NEVER RUN THE PUMP DRY
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 seals.
DO NOT RUN THE PUMP AT
ABNORMALLY HIGH FLOWRATES OR
ABNORMALLY LOW/HIGH DIFFERENTIAL
PRESSURES.
Operating at flow rates higher than specified can
overload the motor and/or cause cavitation and
vibration and/or low pressure at the seal chamber
potentially affecting the mechanical seals. Low
differential pressure may create too low bearings’
loads and skidding. High differential pressure may
create too high bearing loads. Both cases affect the
bearings’ life.
NEVER DO MAINTENANCE WORK
WHEN THE UNIT IS CONNECTED TO POWER
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.
DRAIN THE PUMP AND ISOLATE
PIPEWORK BEFORE DISMANTLING THE PUMP
The appropriate safety precautions should be taken
where the pumped liquids are hazardous.
FLUORO-ELASTOMERS (When fitted.)
When a pump has experienced temperatures over
250 ºC (482 ºF), partial decomposition of fluoro-
elastomers (e.g. Viton) will occur. In this condition
these are extremely dangerous and skin contact
must be avoided.
HANDLING COMPONENTS
Many precision parts have sharp corners and the
wearing of appropriate safety gloves and equipment
is required when handling these components. To lift
heavy pieces above 25 kg (55 lb) use a crane
appropriate for the mass and in accordance with
current local regulations.
GUARDS MUST NOT BE REMOVED WHILE
THE PUMP IS OPERATIONAL
THERMAL SHOCK
Rapid changes in the temperature of the liquid within
the pump can cause thermal shock, which can result
in damage or breakage of components and should
be avoided.
NEVER APPLY HEAT TO REMOVE ROTOR
Trapped lubricant or vapour could cause an
explosion.
HOT (and cold) PARTS
Hot or freezing components or auxiliary heating
supplies can present a danger to operators and
persons entering the immediate area action must be
taken to avoid accidental contact. If complete
protection is not possible, the machine access must
be limited to maintenance staff only, with clear visual
warnings and indicators to those entering the
immediate area. Note: bearing housings must not
be insulated and drive motors and bearings may be
hot.
If the temperature is greater than 80 °C (175 °F)
or below -5 °C (23 °F) in a restricted zone, or
exceeds local regulations, action as above shall
be taken.
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. Both electrical and non-electrical
equipment must meet the requirements of European
Directive 94/9/EC.
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