Johnson Pump Top Wing Series Manual page 7

• Caution must be taken when lifting the pump, appropriate lifting devices should be
used if possible. Lifting rings fitted to the pump are only to be used for lifting the
pump, not for lifting the pump with drive and/or baseplate. For baseplate mounted
pumps the baseplate is to be used for all lifting purposes. If slings are used for lifting,
they must be safely and securely attached.
• Do not attempt maintenance work or disassembly of the pump or pump unit without
making sure that the power switch to the drive unit (electric, hydraulic or pneumatic)
is locked and cannot be switched on. Depressurize and purge any pressure relief
valve and/or shaft seal flushing system. Check that any other associated equipment is
turned off and disconnected. Allow the pump and components to cool down to a safe
handling temperature.
• Do not attempt to dismantle a safety/pressure relief valve whose spring pressure has
not been relieved, is connected to a pressurized gas/air supply or mounted on a
pump in operation. Serious personal injury and/or damage to the pump may occur.
• Do not attempt to loosen or remove the pump cover, connections to the pump, shaft
seal housings, pressure/temperature control devices or other components until you
are sure that such actions will not lead to the unsafe escape of any pressurized media.
• The pump installation must allow for safe routine maintenance and inspection
(check for leakage, change of lubricants, pressure monitoring, etc) and provide
adequate ventilation to prevent overheating.
• Pumps and/or drive units can produce sound levels in excess of 85dB(A) under
unfavorable operating conditions. When necessary, personal protection against noise
must be used. See the curves for sound levels in "Section 3.6''.
• Avoid any contact with hot parts of the pumps or drive units which may cause
personal injury. If the surface temperature of the system exceeds 60°C, the system
must be marked with a warning sign of "hot surface". Operating conditions with
temperature control devices (jacketed, electrically heated, etc), bad installation or
poor maintenance can promote unnormally high temperatures on pumps and/or
drive units.
• When cleaning, either manually or by CIP method, the operator must ensure that a
suitable procedure is used in accordance with the system requirements. During a CIP
cleaning cycle, a pump differential pressure of between 2 and 3 bar is recommended
to ensure that suitable velocities are reached in the pump head. The exterior of the
pumps should be cleaned periodically.
Pumps must always be installed and operated in compliance with prevailing national and
local health and safety regulations and legislation. The pump must be completely
isolated from the pipe work and drive motor before any maintenance work is to be
undertaken. In the event of hazardous products the system, as well as the pump, must be
drained. Never operate the pump without the pump cover.
Always follow all applicable safety measures when manually cleaning the pump:
• Drive unit must be shut down so that it cannot be started.
• Any compressed air controlled, mounted safety relief valve must be closed and
depressurized.
• Connections to flushed mechanical seals must be closed and depressurized.
• The pump and pipe work must be drained and depressurized.
Equipment that is incorrectly installed, operated in a dangerous manner or is poorly
maintained poses a potential safety hazard. If all reasonable safety measures are not
followed, serious personal injury and material damage may occur.
A.0500.301/314.A – IM-TW/10.00 GB (0401)
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