A 4-17-4 1. When piping, please use I.D. equivalent to or larger than N.B. 2. Before piping, flush the system to remove dust, scale, chips, seal tape etc. in the pipe line both on the supply side (supply pressure port side) and secondary side (operation equipment port side). 3. For 3 position closed center, perfect check valve, check for leakage from piping and fittings in-between valve and cylinder by means of soapy water to ensure that there is no leakage. Also check the leakage from cylinder rod seal and piston seal. If there is any leakage, the cylinder, when the valve is deenergized, may move without stopping at mid-position. Therefore leakage from piping and fittings should be completely removed. When applying teflon sealing tape to the thread area, wind it round the thread area 1-2 times while ensuring the thread extends one or two screw pitches beyond the taped area. Also when applying liquid seal materials, leave 1-2 threads from the end, and avoid over-application. Never apply to the female side of the equipment. Valves are pre-lubricated. No further lubrication is necessary. If a lubricant is used (if lubrication is required for cylinder etc.), install lubrication (oiler) on the supply side piping. Please note that the recommended lubricant is turbine oil #1 (ISO VG32). (Never use spindle oil or mashine oil). In addition, when valve is used at low temperature, low temperature oil should be used. The used of turbine oil at temperatures lower than 0°C leads to increased viscosity and may cause the valve to malfunction. Taking safety into the consideration, thepiping system should always be mounted that diassembling and assembling can be carried easily. Single acting valves can be mounted in any direction, but in the case of double solenoid valve in a place subjected to vibration, spool valve should be aligned perpendicular to the vibration. (Never use in a vibration condition of more than 5 G.) For DIN terminal and terminal block (with light/surge voltage suppressor), the interior wiring is shown below. Please connect with respective poewr terminals. 1. When vave is installed in a dusty area, protect cylinder rod to prevent dust from entering secondary piping from rod end. Install to prevent dust from entering secondary piping from rod area. Install silencer or elbow fitting with its outlet pointed downwards to prevent dust from entering the exhaust port of the valve. 2. When used in environmental conditions where corrosive gas, chemical solutions, steam, sea water or high temperatures higher than 60°C exist , please contact SMC. Thread 1/4 Clamping Torque Correct clamping torque kgfcm (N・m) 120 to 140 (12 to 14) ZNR Terminal no.1 (+) Terminal no.2 (.) Terminal no.1 + (.) + (.) + (.) Terminal no.2 + (.) ZNR Single Note) No polarity 24 VDC or less Single AC and 100 VDC 2 thread to be left exposed Winding direction Pipe tape Switching element OFF C A Leakage current Valve Leakage current Source 2 Note) No polarity Applicable terminal: 1.25-3, 1.25-3S, 1.25Y-3N, 1.25Y-3S. But in the case of with DIN terminal block, it is not a terminal structure. 1 1 2 With DIN terminal block With terminal block With indicator light With indicator light NAMUR Valve/Series VFN200N Specific Product Precautions Be sure to read before handling. Piping Lubrication It must be noted that when connecting C-R element parallel to switching element, leakage current flows through C-R element and the leak voltage increases. Ensure that voltage leakage across the coil as follows : AC coil : No more than 20% of the rated voltage DC coil : No more than 3% of the rated voltage Leakage Voltage When the double solenoid type is used with momentary energizing, the energizing time should be taken as 0.1 second or more (At the supply pressure 50 kPa [75 PSI].) 1. The compatibility of 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 after analysis and/or tests to meet your specific requirements. 2. Only trained personnel should operate pneumatically operated machinery and equipment. Compressed air can be dangerous if an operator is unfamiliar with it. Assembly, handling or repair of pneumatic systems should be performed by trained and experienced operators. 3. Do not service machinery/equipment or attempt to remove component until safety is confirmed. 1) Inspection and maintenance of machinery/equipment should only be performed after confirmation of safe locked-out control positions. 2) When equipment is to be removed, confirm the safety process as mentioned above. Cut the supply pressure for this equipment and exhaust all residual compressed air in the system. 3) Before machinery/equipment is re-started, take measures to prevent shooting-out of cylinder piston rod etc. (Bleed air into the system gradually to create back-pressure.) 4. Please contact SMC if the product is to be used in any of the following conditions: 1) Conditions and environments beyond the given specifications, or if product is used outdoors. 2) Installation on equipment in conjuction with atomic energy, railway, air navigation, vehicles, medical equipment, food and beverage, recreation equipment, emergency stop circuits, press applications, or safety equipment. 3) An application which has the possibility of having negative effects on people, property, or animals, requiring special safety analysis. Momentary Energizing Time Warning Light/Surge Voltage Suppressor Mounting Wiring Environmental Conditions