Service And Maintenance Of Atex Equipment; Spare Parts; Flow Sensing Valve - Nederman TAV 50 Manual De Instrucciones

EN Vacuum Valve TAV 50
WARNING!
• Disconnect voltage prior to service.
• The compressed air supply must be disconnected and any remaining pressure in the valve
discharged before commencing any maintenance work to the valve. A shut off valve before
each TAV 50 valve is recommended.
•
The compressed air supply to the TAV 50 valve must be dry and clean (according to
standard ISO 8573-1 class 5). Dirt may result in malfunction by clogging the control device
or the air cylinder inlet. Installing an air filter may be necessary if clogging occurs.
• Make sure the inside of the valve and the connection pipes are free from deposits. Build up
of deposits inside the piping system may cause discharge of static electricity.
• Make sure the outside of the TAV valve, and particularly the solenoid, are free from dust
layers.
•
Oily and sticky substances can sometimes stick to the valve blade resulting in jamming so
that the valve does not close completely. The valve must then be dismantled for cleaning.
•
The backup rings of chloroprene are resistant to most substances in reasonable quantities.
Oil in a large quantity can cause swelling to the rings resulting in jamming.
•
After a million operations the nylon sealing rings should be exchanged in order to avoid
leakage.
•
The piston sealing ring needs changing if internal leakage occurs in the air cylinder. A small
quantity of a silicon free pneumatic grease, for example Microlube GL 261, should be
applied to the new ring before assemby.
• The flow sensing valve (FV) is detailed in section 8. Flow Sensing Valve of this manual.
7.1

Service and Maintenance of ATEX equipment

To ensure the required level of protection with regards to the equipment category, check the
following points:
•
Ensure that the TAV 50 is regularly inspected for damage or malfunction. If the TAV 50 is
damaged it must be replaced or removed immediately from the classified area.
•
Ensure that no explosive atmosphere and/or dust layers are present when cleaning,
servicing or inspecting the TAV.
• Ensure that only original (OEM) spare parts are used.
•
Ensure that the TAV 50 is not covered with thick dust layers (>5 mm). This is prevented by
setting up routines for regular cleaning and including these in the explosion protection
document.
7.2

Spare parts

Contact your nearest authorized distributor or Nederman for advice on technical service or if
you require help with spare parts. See also www.nederman.com.
Ordering spare parts
When ordering spare parts always state the following:
•
Part number and control number (see the product identification plate).
•
Detail number and name of the spare part (see www.nederman.com).
•
Quantity of the parts required.
8

Flow Sensing Valve

The Flow Sensing Valve comes with TAV 50 FV and TAV 50 FV/MV by delivery.
20
Risk of personal injury.