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STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com
Manual 5021, rev. 00 10/2015 – SC/VHS - 12 -
6 OPERATION AND USE
6.1 Operation description
The SC/VHS series is hydraulic actuator designed for on-off and control service and is applicable over a
wide range of pressure, temperatures and environments.
Depending which hydraulic cylinder is pressurized or not, the valve either opens or closes by the action of
the piston (cylinder pressurized) or the spring (cylinder not pressurized).
6.2 Intended use
The machinery covered in this Instruction Manual is single acting hydraulic SC/VHS actuator
series designed to operate a linear industrial valve (globe valves, gate valves, choke valves, ..) for
ON-OFF or modulating heavy duty service.
This SC/VHS actuator is produced by STI srl [Manufacturer] and identified by a label with a product
designation code.
STI srl
will not be liable for any possible damage or physical injury resulting from use in
other than the designated applications or by lack of care during installation, operation, adjustment and
maintenance of the machine. Such risks lie entirely with the user. Depending on the specific working
conditions, additional precautions may be requested. Considering that
STI srl
has no direct control over
particular applications, operation or maintenance conditions, it is the operator’s responsibility to comply
with all applicable safety rules. Please inform
STI srl
urgently if you face unsafe situations not described
in this Instruction Manual. It is the sole responsibility of the operator to ensure that the local health and
safety regulations are adhered to.
SC/VHS actuator is designed in accordance with the applicable International Rules and Specifications,
but the following Regulations must be observed in any case:
- the general and safety regulations
- the plant specific regulations and requirements
- the proper use of personal and protective devices (glasses, clothing, gloves, etc)
- the proper use of tools, lifting and transport equipment.
Warning
It is severely forbidden to use the SC/VHS actuators series for purpose or
application other than those for which it was designed and here above specified.
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