VAG Installation and Operating Instructions • 10
The switching points of remote control components have to be
adjusted on site. The torque switches serve as overload protec-
tion in intermediate positions. If the Penstock is retrofitted with an
electric actuator, the limit switches have to be adjusted after the
assembly of the actuator. For information about adjustment, ple-
ase refer to the operation instructions of the manufacturer of the
electric actuator.
The relevant safety regulations of the VDI/VDE and the instruc-
tions of the manufacturer of the electric actuator must be com-
plied with.
The electric actuator must only be operated with a control unit
connected. If limit switches and torque switches are not connec-
ted and properly adjusted, the Penstock and the electric actuator
may be damaged. In this case the manufacturer does not assume
any liability.
Upon delivery, the adjustment screws and connection bolts of the
gear unit and electric actuator are sealed by adhesive labels or
identified by colour markings. If these identifications are broken
later on, this will result in the loss of the manufacturer‘s warranty.
7 Maintenance and repair
7.1 General safety instructions
Prior to any inspection and maintenance work on the Penstock or
its assemblies the valve must be de-pressurised. Depending on
the type of the fluid conveyed, all required safety regulations must
be complied with!
After completing the maintenance works and before resuming
operation, check all connections for proper fastening and tight-
ness. Perform the steps described for initial set-up as described
under Section 5 “Set-up and operation”.
Statutory and local provisions as well as the safety and accident
prevention regulations must be observed and complied with at all
times.
Any damage that may be caused by electric current and current
flow must be prevented. Couplings and connections must never
be disassembled when they are under pressure or energised.
Servicing, maintenance and inspection work as well as the repla-
cement of spare parts must only be done qualified staff. The plant
operator is responsible for determining the suitability of the staff
or for ensuring the relevant qualifications.
In case the operator’s employees do not have the qualifications
required, they need to attend a training course. This training
course can e.g. be held by VAG Service employees.
Upon the customer’s request, the penstock can be assembled by
VAG’s Technical Service.
The plant operator needs to ensure that all employees have un-
derstood these Installation and Operation Instructions as well as
all further instructions referred to in them.
Protective equipment such as safety boots, safety helmets,
goggles, protective gloves etc. must be worn during all work re-
quiring such protective equipment or for which such protective
equipment is prescribed.
Improper , wrong and abrupt use of the Penstock should be avoi-
ded. Prior to the performance of any work on the Penstock and
equipment it must be ensured that the relevant pipeline section
has been depressurised and/or de-energised.
7.2 Inspection and operation intervals
The tightness, operability and corrosion protection of the Pen-
stock should be checked at least once per year according to the
German (DVWG Guidelines W 392). In case of extreme operating
conditions inspection should be performed more frequently.
Upon the customer’s request, inspection and maintenance of the
penstock can also be performed by VAG’s Technical Service.
7.3 Maintenance work and replacement of
parts
Spare parts and parts subject to wear and tear can be replaced.
All replacement work must be done by skilled staff. Detailed inst-
ructions for the replacement of spare parts and parts subject to
wear and tear are enclosed with the delivery of spare parts and
parts subject to wear and tear.
Moving parts, such as threaded stems, stem nuts and stem bea-
ring elements, are all to be lubricated regularly, at least once a
year, with a water-repellent lubricant. We recommend that you
use the lubricant Klüberplex BE 31-102.
The gaskets must also be lubricated at least once a year when
moving parts are operated in drinking water or used for flood pro-
tection purposes. We recommend that you use the lubricants:
Fuchs Chemplex Si 2
Fuchs Notropeen Si 1
Klüberbeta VR 67-17002
Klübersynth
®
VR 69-252 N.
Der VAG EROX
®
plus
Penstock must be operated at least once a
year in order to maintain its functional capability. Coarse dirt
should also be removed from the VAG EROX
®
plus
Penstock at re-
gular intervals, at least twice per year.
No other maintenance work is required.
8 Trouble-shooting
For all repair and maintenance work, please observe the general
safety instructions described in Section 7.1!
