Varisco S.p.A.
Z.I. Nord - Terza Strada, 9 - 35129 PADOVA – ITALY
Tel.+39.049.8294111 Email: [email protected]
Fax+39.049.8076762 Web: www.variscospa.com
9
4.6.2 PROTECTION AGAINST DELIVERY OVERPRESSURE
The overpressure protection consists of a security valve set to the desired pressure and a bypass pipe
which closes delivery or reduces the flow in case the pump may not be stopped.
4.6.3 RETURN VALVE IN DELIVERY
In case it is necessary to convey part of the product back to the tank in order to mix or make the
product more homogeneus, it is possible to fit a valve in the delivery.
4.6.4 ELECTRIC BOARD
Upon request, pumps can be controlled by an elecric board, consisting of a main switch, a pilot
light, a liter counter, two-position forward/backward selector and a reset emergency switch. The
boards are also equipped with a safety lock. All boards are supplied with the Statement of
Conformance required by the Law 46/90.
5 PACKING, TRANSPORT, STORAGE
5.1 PACKING AND TRANSPORT
Progressing cavity pumps are shipped in containers (boxes on pallets, cases or cages), unless the
customer requires something different.
The parcels are marked and supplied with handling instructions.
Upon receipt, check for possible damages.
Transport damages are to be reported immediately to the carrier.
Pumps are to be brought packed as near as possible to the installation site and kept packed as long
as possible.
Horizontal axis pumps, once unpacked, can be lifted exclusively with the base. Use external holes
and eyebolts on the base. (For dimensions, see drawing in the
Service Manual
).
Vertical axis pumps can be lifted using the holes in the support plate or eyebolts or in the bracket.
The motor is usually at the top end. (For dimensions, see drawing in the
Service Manual
).
WARNING
: do not lift machines with weight on top (with center of gravity above the lifting
point). Make sure they do not capsize.
Vertical axis pumps must never rest in upright position without adequate fixing!
Warning: they may fall!
Always arrange them horizontally. Absolutely do not lift the pump using
the motor or reduction gear eyebolts. They are meant for transport of
motor or reduction gear
only
.
Due to the diversification of configurations, these are to be considered as general instructions,
usually meant for skilled personnel in charge of transport and assembly.
If more detailed instructions were needed, instructions related to specific machine can be supplied.
For trailer-mounted pumps follow this:
