Safety Instructions These safety instructions are intended to prevent hazardous situations and/or equipment damage. These instructions indicate the level of potential hazard with the labels of “Caution,” “Warning” or “Danger.” They are all important notes for safety and must be followed in addition to International Standards (ISO/IEC) , and other safety regulations.
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Safety Instructions Caution 1. The product is provided for use in manufacturing industries. The product herein described is basically provided for peaceful use in manufacturing industries. If considering using the product in other industries, consult SMC beforehand and exchange specifications or a contract if necessary. If anything is unclear, contact your nearest sales branch.
∗ VPA31 5 Series Precautions for 3 Port Air Operated Valve ① Be sure to read before handling. Design / Selection Selection Warning Caution 1. Confirm the specifications. 1. Use in low temperature environments Products represented in this manual are designed only for use Valve use is possible to temperature to 0 C.
∗ VPA31 5 Series Precautions for 3 Port Air Operated Valve ② Be sure to read before handling. Piping Connection Female Thread: G Wrench tightening angle Tightening torque Caution Uni thread size after tightened by hand (N·m) (deg) 1. Preparation before piping 30 to 45 3 to 4 Before piping is connected, it should be thoroughly blown out...
∗ VPA31 5 Series Precautions for 3 Port Air Operated Valve ③ Be sure to read before handling. When the equipment is operated after remounting or Air Supply replacement, first confirm that measures are in place to prevent lurching of actuators, etc. Then, confirm that the Caution equipment is operating normally.
∗ VPA31 5 Series Specific Product Precautions Be sure to read before handling. Other Precautions Caution 1. Pressure balance among each port This valve is pressure-unbalanced type. Operate it within this pressure range: IN ≧ OUT ≧ EXH. If not operated in the range, the valve will malfunction.
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∗ VPA31 5 Series Specific Product Precautions ② Be sure to read before handling. Overhaul, Cleaning, Addition of Grease (VPA31∗5V Series: Vacuum Specification) 1) How to overhaul (Remove air supply before starting disassembly.) Remove the four hexagon socket head cap screws○ and take the housing.
Trouble shooting According to the failure, check the cause of the failure from which seems to effect the failure more than the other and devise a countermeasure. Remedy Failure Cause (Next page) Valve would not Foreign matter caught in ① Operation failure be switched.
Remedy Remedy ① Replace the valve. - If the lubrication oil was incorrect, remove the oil by air blow and replace the valve. Lubricate turbine oil class 1 (ISO VG32) surely after replacing the valve. ② - When a large quantity of drain is given and cannot carry out drain omission surely, install either an auto-drain or a dryer.The valve should be replaced.
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