VR51-TF2Z003EN-A
Page 3 of 3
8 Limitations of Use - continued
•
Do not use the product with a pressure under 0.25 MPa. The time lag
for operating the VR51 is different depending on the operating
pressure. The higher the operating pressure, the shorter the time lag,
and vice versa. If used under 0.25 MPa, an output will be produced;
however, safety is not likely to be maintained, even though the time lag
may exceed 0.5 seconds.
Caution
8.3 Low temperature operation
In the case of using in low temperature, take measures not to freeze the
drainage or moisture.
8.4 Trouble shooting
Symptom
Possible fault
Action
Note)
Cylinder does
not operate
Supply pressure is too low
Check supply pressure
Time difference between P1
and P2 is more than 0.5 s.
Check & ensure P1 and P2 is
supplied within 0.5 s time
difference.
Start-up valves (push button
operated) malfunction.
Check if valves are operating
correctly.
Control valve faulty
Refer to 9 Product Failure Modes.
Start-up valve is 2 port
Replace 2 port with 3 port valve
Piping lengths P1 & P2 are
not same
Ensure P1 and P2 are same length
Output does
not turn off
Start-up valve is 2 port
Replace 2 port with 3 port valve
Table 3.
Note: If there are doubts about the performance of the unit, replace the whole unit.
8.5 Limitations
Caution
•
This product is CE/UKCA marked as a safety component as defined
under the Machinery Directive 2006/42/EC / The Supply of Machinery
(safety) Regulations 2008. For details, please refer to the Declaration
of Conformity supplied with the product.
•
The valve may only be used to provide the stated safety function as a
logic unit for use in two-hand control circuits. The valve can only
perform as a safety component when properly installed in a system
conforming to the appropriate safety standards.
•
Any such use must be within the specified limits and application
conditions for the product.
•
In order to meet a required performance level as defined by the
appropriate safety standard, the user must provide all the other
necessary components to complete function of the safety system.
•
The user is responsible for the specification, design, implementation,
validation and maintenance of the safety system.
9 Product Failure Modes
Warning
Failure mode
Cause
Action
Malfunction allowing output by
one-handed operation.
Ingress of foreign matter
Please
replace
the
product.
Malfunction allowing output 0.5
seconds or longer after
operation.
Ingress of foreign matter
Loss of lubrication
Sticking after long period of inactivity
Leakage to exhaust port
preventing output.
Ingress of foreign matter
Loss of lubrication
Malfunction delaying exhaust.
Ingress of foreign matter
Table 4.
10 Product Disposal
This product shall not be disposed of as municipal waste. Check your
local regulations and guidelines to dispose this product correctly, in order
to reduce the impact on human health and the environment.
11 Contacts
Refer to www.smcworld.com or www.smc.eu for your local
distributor/importer.
URL :
https:// www.smcworld.com (Global) https:// www.smc.eu (Europe)
SMC Corporation, 4-14-1, Sotokanda, Chiyoda-ku, Tokyo 101-0021, Japan
Specifications are subject to change without prior notice from the manufacturer.
© 2022
SMC Corporation All Rights Reserved.
Template DKP50047-F-085M
