1. DEVICE
DESCRIPTION
1.1.
OPERATING PRINCIPLE AND CONSTRUCTION
The device is actuated by means of a horizontal sliding selector
which enables switching of the ports within approximately 0.10 sec.
It is therefore possible to change flow direction or to switch the flow
path, according to the type of installation.
The device is an all aluminum alloy construction. It is not subject to
contacts and interferences between the selector and device body.
The selector acts on special flexible teflon segments which ensure
efficient sealing between the flow chambers, and is returned and
kept in the basic position by means of a coil spring.
The device can be operated either electrically or pneumatically.
2. GENERAL
INSTRUCTIONS
2.1. SAFETY
RULES
CAUTION!
The flow converting devices ‘VS’ have been
designed and manufactured for use in an industrial
environment, operated by qualified personnel and
as a unit to be incorporated in a machine, which
conforms to the CE Machinery Directive.
The flow converting devices ‘VS’, like all machinery
and equipment with live and moving parts, can be
a source of serious hazards unless properly used
and protected.
The user must ensure that:
All handling, assembly, installation, connection,
maintenance and repair operations are undertaken
by qualified personnel. Such people who by their
background, training and experience as well as
through their knowledge of statutory regulations,
legislation, safety measures and operating
conditions are able to carry out any necessary
steps avoiding all possible risks to health and
damage.
Such personnel should have received all the instructions and
information, including any local legislation, and will follow this
information during the performance of any operation.
It shall be forbidden for unqualified personnel to carry out any
operation, even indirectly, on the machines and equipment.
During the installation, all the prescribed working conditions,
including any possible local requirements, shall be observed.
Additionally it is forbidden to put the unit in service before the
machines of which they are a part are declared to conform to
the CE Machinery Directive.
The user must be aware that in operation:
•
there can be an increase in unit operating temperature;
•
there is small loss of the fluid handled;
•
the level of noise may be unacceptable in certain
applications.
CAUTION!
Before undertaking any operation ensure that the unit is
disconnected from power supply.
2.2.
FIELD USE AND WORKING CONDITIONS
The flow converting devices ‘VS’ are designed for the continuous
movement of air or non-explosive, non-hazardous and non-
flammable gases and for service in non-explosive environments.
Devices are designed and manufactured to flow converting in low
pressure / vacuum applications. They are for use specifically on
low pressure blowers and vacuum pumps only.
Solid particles, however small, including dirt can cause serious
damage; therefore it is essential that such substances should be
removed from the gas by suitable filters upstream of the inlet.
There is small loss of the fluid handled.
Pressure loss through the converter, as a function of flow, is
indicated on graph below:
.
2.3.
STORAGE AND SHIPPING
Store the unit in a dry place, preferably in original packaging.
Do not remove the protection plugs from the ports.
Avoid stacking anything on top of the packaging.
Handle the devices with care and avoid sudden impacts.
When handling devices (lifting, moving, in transit, storing)
appropriate procedures need to be used. This work should be
organized in a safe / secure environment, minimizing the risk of
any possible mishap. For example:
•
ensure staff is adequately trained;
•
use secure / stable mounting/support structures;
•
wear suitable workclothes and individual protection
devices;
3. INSTALLATION
3.1. LAY-OUT
It is important that the unit is installed in a well-ventilated
environment where the temperature does not exceed 40°C.
If outside, protect the unit from direct sunlight and avoid the
possibility of water collecting in the external crevices.
Please refer to attached SI1787 for unit dimensions
0 20 40 60 80 100 120
0 0,5 1,0 1,5
mbar
psig
VS 6
m
3
/h
cfm
50
100
200
300
400
600
800
1000
1400
0
50
100
200
300
400
500
600
800
VS 8
Pressure loss per port
(vacuum / pressure)
0
GB - 10/13
