Model DS255SR61
Janatics DS2 series pilot-operated spool valves in 3/2, 5/2 and 5/3, G1/4 ported, working 2 to 10 bar with IP65 coils in AC and DC voltages. Supplied as inline or manifold-mounted solenoid valves and as NAMUR interface valves for direct mounting on quarter-turn actuators.
Prices on request. Contact us for availability and quotations.
The Janatics DS2 is a pilot-operated spool valve: the solenoid does not shift the spool directly but opens a small pilot passage, and line pressure does the work. That is why the valve needs a minimum of 2 bar to operate and why a small coil - 6 VA on AC, 5 W on DC - can switch 1200 l/min. The unit photographed is DS255SR61, the 5/2 single solenoid version with spring return, in which the spool is held over while the coil is energised and returned by its spring when power is removed, so the cylinder takes a defined position on power failure.
The series also covers 3/2 normally open and normally closed, 5/2 double solenoid, and 5/3 with a blocked, exhausted or energised centre. Ports on the 5/2 and 5/3 valves are G1/4 for inlet and outlets with G1/8 exhausts and external pilot; the 3/2 valves carry G1/4 throughout. Every valve has a manual override for commissioning and fault-finding without energising the coil, and the bodies take a manifold as well as individual mounting.
NAMUR valves are the same switching function in a different mounting form. Rather than piping a valve to an actuator, a NAMUR valve bolts straight onto the actuator face through the interface fixed by VDI/VDE 3845. That interface carries two actuator air ducts in the mounting face and four tapped fixing holes - M5 on the 1/4" size, M6 on the 1/2" - one of which takes a coded screw so the valve can only be fitted the right way round, while the supply and any external pilot supply are piped separately. Any NAMUR valve therefore fits any NAMUR actuator regardless of maker, which is why the interface is standard on pneumatically actuated ball and butterfly valves. NAMUR is a mounting interface, not a manufacturer.
When ordering, state the function, the port size, whether single or double solenoid, and the coil voltage - AC 50 Hz at 24, 48, 110 or 220 V, or DC at 12, 24, 48 or 110 V, all within plus or minus 10 per cent. Janatics warns that the valve needs a supply capable of 1200 l/min through tube of at least 8 mm outside diameter and 5.5 mm bore, or the valve will malfunction on the manual override and on the coil. Air is to be filtered and lubricated with ISO VG32 oil.
| Valve Function (unit photographed) | 5/2, single solenoid, pilot operated, spring return - Janatics DS255SR61 |
|---|---|
| Functions Available | 3/2 normally open and normally closed, 5/2 single or double solenoid, 5/3 with blocked, exhausted or energised centre |
| Design | Spool type, pilot operated, with manual override |
| Port Size | 5/2 and 5/3: inlet and outlets G1/4, exhaust and external pilot G1/8. 3/2: inlet, outlet and exhaust G1/4, external pilot G1/8 |
| Working Pressure Range | 2 - 10 bar |
| External Pilot Pressure (ER models) | 2 - 4 bar |
| Flow | 1200 l/min at 6 bar inlet and 1 bar pressure drop |
| Ambient / Medium Temperature | 5 to 60 °C |
| Medium | Compressed air, filtered and lubricated (ISO VG32 oil) |
| Materials of Construction | Aluminium, nitrile, brass, acetal, PBT, zinc |
| Coil Voltage | AC 50 Hz: 24, 48, 110 and 220 V. DC: 12, 24, 48 and 110 V. Tolerance ± 10 % |
| Coil Power and Duty | AC 6 VA, DC 5 W; continuous duty; insulation class F |
| Coil Protection | IP65 |
| Coil Width | 22 mm |
| NAMUR Mounting Interface | NAMUR interface to VDI/VDE 3845: two actuator air ducts in the mounting face plus four tapped fixing holes - M5 on the 1/4" interface and M6 on the 1/2" - one of which takes a coded screw that fixes the mounting position of the valve. Supply and any external pilot supply are piped separately |
| Minimum Supply | 1200 l/min through tube of at least 8 mm outside diameter and 5.5 mm bore, or the valve will malfunction on manual override and on the coil |
