Brochure
Proportional control
The fluid is controlled proportionally according to an input signal (current).
Max. operating pressure differential
Indicates the max. pressure differential (difference between the inlet and the outlet pressure) which is allo-
wed for operation with the valve closed or open.
Max. operating pressure
Indicates the limit pressure that can be applied to the inlet. (The pressure differential of the proportional val-
ve must be no more than the maximum operating pressure differential)
Orifice diameter
Diameter of the hole sealing the body of the proportional valve. This does not indicate the effective cross
section.
Hysteresis
Maximum flow rate difference between the current increase and the current decrease (for the same current).
(Percentage divided by the max. flow rate)
Repeatability
Deviation of output flow rate when the same current is applied.
(Percentage divided by max. flow rate)
Start-up current
Current at which the flow rate is actually output when increasing the current from zero.
(Percentage divided by the rated current)
Glossary
Series PVQ
Safety Instructions
1. The compatibility of the pneumatic equipment is the responsibility of the person who designs the
pneumatic system or decides its specifications.
Since the products specified here are used in various operating conditions, their compatibility for the specific pneumatic system
must be based on specifications or post analysis and/or tests to meet the specific requirements. The expected performance and
safety assurance are the responsibility of the person who has determined the compatibility of the system. This person should
continuously review the suitability of all items specified, referring to the latest catalogue information with a view to giving due
consideration to any possibility of equipment failure when configuring a system.
2. Only trained personnel should operate pneumatically operated machinery and equipment.
Fluids can be dangerous if handled incorrectly. Assembly, handling or repair of the systems using pneumatic equipment should
be performed by trained and experienced operators.
3. Do not service machinery/equipment or attempt to remove components until safety is confirmed.
1. Inspection and maintenance of machinery/equipment should only be performed once measures to prevent falling or runaway of
the driven objects have been confirmed.
2. When equipment is removed, confirm the safety process as mentioned above. Turn off the supply pressure for this equipment
and exhaust all residual compressed air in the system.
3. Carefully restart the machinery, confirming that safety measures are being implemented.
4. Contact SMC if the product will be used in any of the following conditions:
1. Conditions and environments beyond the given specifications, or if product is used outdoors.
2. With fluids whose application causes concern due to the type of fluid or additives, etc.
3. An application which has the possibility of having negative effects on people and/or property, requiring special safety analysis.
Selection/Handling/Applications
1. SMC, its officers and employees shall be exempted from liability for any loss or damage arising out of
earthquakes or fire, action by a third person, accidents, customer error with or without intention,
product misuse, and any other damages caused by abnormal operating conditions.
2. SMC, its officers and employees shall be exempted from liability for any direct or indirect loss or
damage, including consequential loss or damage, loss of profits, or loss of chance, claims, demands,
proceedings, costs, expenses, awards, judgments and any other liability whatsoever including legal
costs and expenses, which may be suffered or incurred, whether in tort (including negligence),
contract, breach of statutory duty, equity or otherwise.
3. SMC is exempted from liability for any damages caused by operations not contained in the catalogues
and/or instruction manuals, and operations outside of the specification range.
4. SMC is exempted from liability for any loss or damage whatsoever caused by malfunctions of its
products when combined with other devices or software.
Exemption from Liability
These safety instructions are intended to prevent a hazardous situation and/or equipment damage. These
instructions indicate the level of potential hazard by labels of "Caution", "Warning" or "Danger". To
ensure safety, be sure to observe
ISO 4414
Note 1)
, JIS B 8370
Note 2)
and other safety practices.
Note 1) ISO 4414: Pneumatic fluid power – General rules relating to systems
Note 2) JIS B 8370: General Rules for Pneumatic Equipment
Note 3)
Injury indicates light wounds, burns and electrical shocks that do not require hospitalization or hospital visits for long-term medical treatment.
Note 4) Equipment damage refers to extensive damage to the equipment and surrounding devices.
Danger
In extreme conditions, there is a possible result of serious injury or loss of life.
Warning
Operator error could result in serious injury or loss of life.
Caution
Operator error could result in injury
Note 3)
or equipment damage.
Note 4)
Labels Explanation of the labels
Explanation of the Labels
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