2.1 Intended use
SCVA series safety valves are used to con-
trol hazardous movements in pneumatic
safety systems with category 4 control
requirements per ISO 13849-1 with perfor-
mance level „e“. The valves are only intended
to use in large scale stationary industrial
tools or plants.
The valve must not be used in explosive
zones/areas.
It shall be ensured that clogging of the silen-
cers can not result in a hazardous condition.
2.2 Not intended use
The use of the valve is in the following cases
not intended
:
•
The valve is used outside the specified
operational values. The permitted tempe-
rature- and pressure ranges are exceeded.
•
Damages on the valve have been noticed,
but the valve is still in operation.
•
The valve has been structurally changed
without permission of the manufacturer.
•
The safety instructions in this documenta-
tion have not been observed.
•
The valve is used in explosive zones/areas.
•
A noise reduction measurement has not
been applied.
•
The safety valve has been disassembled or
single parts separated/exchanged.
•
The safety valve is used as a climbing
assist.
•
SCVA 3/2-way double valves are not suita-
ble for the control of clutch and brake on
mechanical presses.
•
Pneumatically actuated 3/2-way double
valves are not suitable for the control of
clutch and brake on mechanical presses.
!
WARNING
Clogging of silencers
Dirt can cause malfunction of the safety
silencer.
´
Check for adequate air quality.
2.3 General risks
The following section lists residual risks
which may be present even if the safety
valves are used correctly.
!
DANGER
Danger caused by hazardous
movements
When the power is switched
off or if there is a power cut
the loads supported by the
safety valves can drop and the system
can lose pressure. This can cause serious
injuries..
Provide additional mechanical safety
devices that prevent hazardous
movements after the power is switched
off.
!
CAUTION
Danger of injury caused by
hot surfaces
The safety valves can become
very hot during operation. Skin
contact with hot surfaces causes severe
burns.
´
When working near hot surfaces,
always wear heat-resistant protective
clothes and protective gloves.
´
Before you start any work, make sure
that all surfaces have cooled to ambi-
ent temperature.
2
General safety instructions
This section provides an overview of all major safety aspects for the protection of people
and for safe, fault-free operation. Further task-related safety notices appear in the sections
on transportation, installation, checks before initial operation, and maintenance.
The safety instructions are related to the valve itself. In combination with other machine
parts, additional potential risks might occure which must be evaluated in a risk assessment
of the complete machine.
´
The limitations of temperature, pressure ranges, must not be exceeded.
7503618000000006
005
Incorporating
SCVA
02/22
Our policy is one of continued research and development. We therefore reserve the right to amend,
without notice, the specifi cations given in this document. © 2014 Norgren Ltd