2 Port Solenoid Valve For Dust Collector Series VXF2/VXFA2 Mounting Warning 1. If air leakage increases or equipment does not operate properly, stop operation. After mounting is completed, confirm that it has been done correctly by performing a suitable function test. 2. Do not apply external force to the coil section. When tightening is performed, apply a wrench or other tool to the outside of the piping connection parts. 3. Mount a valve with its coil position upward, not downward. When mounting a valve with its coil position downward, foreign objects in the fluid will adhere to the iron core leading to a malfunction. Especially for strict leakage control, such as with vacuum applications and non-leak specifications, the coil must be positioned upward. 4. Do not warm the coil assembly with a heat insulator etc. Use tape, heaters, etc., for freeze prevention on the piping and body only. They can cause the coil to burn out. 5. Avoid sources of vibration, or adjust the arm from the body to the minimum length so that resonance will not occur. 6. Painting and coating Warnings or specifications printed or labeled on the product should not be erased, removed or covered up. Piping Warning 1. During use, deterioration of the tube or damage to the fittings could cause tubes to come loose from their fittings and thrash about. To prevent uncontrolled tube movement, install protective covers or fasten tubes securely in place. 2. For piping the tube, fix the product securely using the mounting holes so that the product is not in the air. Tightening Torque for Piping Connection thread 12 to 14 22 to 24 28 to 30 28 to 30 36 to 38 40 to 42 48 to 50 48 to 50 48 to 50 Proper tightening torque N・m Rc1/4 Rc3/8 Rc1/2 Rc3/4 Rc1 Rc1 1/2 Rc2 Rc2 1/2 Rc3 Piping Caution 3. Always tighten threads with the proper tightening torque. When attaching fittings to valves, tighten with the proper tightening torque shown below. 4. When connecting piping to a product Avoid mistakes regarding the supply port etc. 5. If a regulator, or a restrictor, is installed immediately before or after the IN port of the valve, the main valve may oscillate (chatter). Install them away from the valve or change the restriction. 6. The header tank capacity should be sufficient. This is a valve for large flow rate, so if the capacity is small, the main valve my oscillate due to pressure drop or insufficient air supply. Caution 1. Preparation before piping Before piping is connected, it should be thoroughly blown out with air (flushing) or washed to remove chips, cutting oil and other debris from inside the pipe. To prevent uncontrolled tube movement, install protective covers or fasten tubes securely in place. 2. Avoid connecting ground lines to piping, as this may cause electric corrosion of the system. Wiring Caution 1. As a rule, use electrical wire with a cross sectional area of 0.5 to 1.25 mm2 for wiring. Furthermore, do not allow excessive force to be applied to the lines. 2. Use electrical circuits which do not generate chattering in their contacts. 3. Use voltage which is within ±10% of the rated voltage. In cases with a DC power supply where importance is placed on responsiveness, stay within ±5% of the rated value. The voltage drop is the value in the lead wire section connecting the coil. 4. When a surge from the solenoid affects the electrical circuitry, install a surge voltage suppressor etc. in parallel with the solenoid. Or, adopt an option that comes with the surge voltage protection circuit. (However, a surge voltage occurs even if the surge voltage protection circuit is used. For details, please consult with SMC.) Series VXF2/VXFA2 Specific Product Precautions 2 Be sure to read before handling. Refer to front matter 41 for Safety Instructions and pages 17 to 19 and the Operation Manual for 2 Port Solenoid Valves for Fluid control. Please download it via our website, http://www.smcworld.com 302