Connections; Using Vacuum Valve Tav; Directions For Use; Maintenance - Nederman TAV 50 Manual De Instrucciones

5.3

Connections

SAFETY
Maximum recommended air pressure is 1 MPa (10 bars). A pressure regulator
must be installed if the pressure is likely to exceed the maximum pressure. Recommended
working pressure is 0.6–0.7 MPa (6–7 bars). Min. pressure for a reliable function is 0.5 MPa (5
bars). Compressed air hoses must be approved for the actual pressure and must be securely
fastened to the valve nipples. Hose clips must be fitted correctly.
Figures 8–13 explain how to connect TAV valves having different control devices. A "flash arrow"
indicates an electric supply. P indicates a compressed air supply.
•
TAV 50 PC (figure 8) is not fitted with its own control device. It is intended for direct control
with a remote 3-port pilot valve (option).
•
TAV 50 MA (figure 9) is controlled by a hand operated lever. It is used when there is no
need for automatic controlling.
•
TAV 50 MV (figure 10) has a solenoid valve control device. The solenoid voltage must match
the signal voltage. TAV 50 MV can be directly controlled by a stationary electric machine.
However, extra branch fuses should be used if the mains fuses are too large for this
function. See rated voltage and power on the solenoid. TAV 50 MV can also be controlled
by a hand held electric tool. A current sensing relay (option, see figure A page 8) must
be installed in this case.
•
TAV 50 MV-W (figure 11) is supplied with a control device consisting of a 24 V AC solenoid,
a control box and a sensor ring which can detect a welding current. Each valve must be
supplied with 24 V AC from a transformer (optional), that can be shared by a number of
valves.
•
TAV 50 FV (figure 12) carries a control device in the form of a flow sensing valve. This option
is used when TAV 50 is to open for a compressed air flow, for example to an air tool.
•
TAV 50 FV/MV (figure 13) features two control devices, a flow sensing valve and a solenoid
valve. It can be controlled by an electric signal as well as by a compressed air flow.
6

Using Vacuum Valve TAV 50

6.1

Directions for use

WARNING! Risk of personal injuries and/or product damages.
•
Keep fingers clear off the vacuum connections when the valve is connected to compressed air.
The spring that closes the valve is strong enough to cause discomfort.
•
Make sure the system does not transport material which can damage the TAV valve.
•
If an unexpected object comes into the system, shut the compressed air supply to the valve
immediatelly and remove the object.
7

Maintenance

Installation, repair and maintenance work is to be carried out by qualified personnel using only
original Nederman spare parts. Contact your nearest authorized distributor or Nederman for
advice on technical service.
Vacuum Valve TAV 50 EN
19