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O.M.A.C. s.r.l.
Via Giovanni Falcone, 8 42048 Rubiera (RE) - Italy Tel.0522/629371 - 629923 Fax 0522/628980
E-mail:info@omacpompe.com SitoWeb:www.omacpompe.com
Rev.4 del 01/2011 O.M.A.C. s.r.l.
Chap.6 - pag.
CHAPTER 6: B SERIES LDPU DECOMMISSIONING
Where provided, the contents of this chapter is specifi cally addressed to the internal company maintenance engineer. This person, named directly and
formally by the Customer company management; has at least two years experience in this role and has the required technical abilities for operating in
safety conditions and understand and interpret the technical indications contained in the above mentioned documentation properly.
During assembly and disassembly operations of the LDPU, as in occasion of its routine and extraordinary one must wear
the personal protection equipment, according to the operation and risk connected to the activity performed by the appointed operator, as described in
section 1.9.
6.1 Disconnection from the sources of energy
DANGER
Before disconnecting the LDPU from its energy supplies, make sure that the plant or part of it is contained in complies with the following conditions:
absence of process fl uid and eventually washing of parts in contact with process fl uid;
absence of residual pressure;
temperature of contact surfaces not dangerous.
As already highlighted inside this use and maintenance manual, the LDPU must be disconnected from the energy sources:
electric (motorisation);
hydraulic (driving force, fl ushing and/or aseptic unit when present);
pneumatic (driving force, pneumatic safety valve, when present).
Disconnection of the LDPU from the energy sources requires strict compliance with the indications below:
with reference to Chapter 4, stop operation of the LDPU (of every component) and consequently stop operation of the plant;
once operation of the LDPU has been stopped, put every main switch in the plant in position “0”, so that every part of the line is insulated from
the power network (electric, etc.);
make sure that the various “presence of voltage” warning lights are switched off;
if an aseptic system and/or fl ushing system are present, make sure that the auxiliary liquid supply hydraulic control unit is switched off;
when the LDPU requires compressed air to operate (presence of pneumatic safety valve), move the compressed air supply/discharge tap
lever in close/discharge position and wait for a few minutes. This way the machine is insulated from the pneumatic supply network and furthermore the
residual energy present inside the pneumatic circuit is discharged;
DANGER
Before disconnecting the lobe pump from its energy supplies, make sure that the upstream energy supply has been interrupted, that the hydraulic supply
has been interrupted, that the compressed air has been interrupted and there is no residual energy (i.e. for example: that the compressed air present in
the pneumatic plant has been discharged). Also check that the compressed air supply tap of your plant is closed.
in case of electric supply, making sure that you do not have any parts of your body near the damp areas, remove the plug from the electric
system of the machine, from the electricity socket;
if pneumatic supply is present, free the fi xing of the pneumatic supply pipe;
if hydraulic supply is present, free the fi xing of the hydraulic supply pipe;
pay utmost attention to possible leaks of remaining liquids. These leaks must be dried immediately in order to prevent slipping.
It is reminded that the operations needed to disconnect the LDPU from its energy supplies, for the complexity of the numerous checks / tests to be carried
out, must be performed by skilled personnel only.
Please be reminded that to operate the LDPU may need electricity, hydraulics and compressed air; connections that need to be disconnected carefully,
taking care to verify the absence of stored residual energy in addition to water leaks.
DANGER
if not formally authorised, do not attempt to disassemble parts of the LDPU.
O.M.A.C. S.r.l. is not liable for damages to things or persons during disassembly carried out by unauthorised personnel.
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