The Festo VYKA 2/2 normally open media-separated solenoid valve is a compact diaphragm valve that shuts off liquids and gases on demand in laboratory instruments.
Available in three seal and diaphragm materials: FFKM, FKM or EPDM, all with a PEEK fluid path and a 1.2 mm orifice nominal size.
Supplied with the handy E-box (50 cm open-end cable, with holding current reduction) and M2 mounting screws. The PEEK sub-base with 1/4-28 UNF ports can be added as an option.
General
This 2/2-way normally open solenoid valve keeps a single fluid line open at rest and closes it only while the coil is energised. As soon as the current stops, the mechanical spring reopens the line, so the flow path is restored automatically on power loss. That fail-open behaviour is what you want for venting, draining, pressure relief and flush lines, and it also means the valve draws no power during the state it spends most of its time in.
A flexible diaphragm separates the medium from the actuator, so your reagents only ever touch PEEK and the diaphragm material. With a small internal volume and a switching time of a few milliseconds, this valve suits diagnostic analysers, liquid handling platforms, dispensing heads and point-of-care instruments. It also operates under vacuum, so you can use the same part for aspiration and for pressure-driven flow.
Advantages
- Fail-open by design: the line reopens by itself when power is cut, which is the safe default for venting, draining and flush cycles and removes the need for a separate bypass.
- Full media separation: the diaphragm keeps aggressive reagents, solvents and biological samples away from the coil and the moving parts, which protects the actuator and keeps your fluid path clean.
- Very low internal volume: only a few tens of microlitres inside the valve, so you waste less reagent, flush faster and keep carryover between samples to a minimum.
- Fast and repeatable switching: millisecond response with reproducible behaviour, which is what you need for accurate volumetric dispensing.
- Works under vacuum and pressure: the operating range covers -0.5 to 2 bar (-7.25 to 29 psi), so a single valve handles aspiration, degassing and pressurised delivery.
- Low power consumption: holding current reduction in the supplied E-box lets you run a 100% duty cycle without heating the valve or the liquid inside it.
- Very small and light: 10.9 g on a 7.5 mm pitch, so you can pack several valves side by side in a crowded instrument.
- Built for regulated environments: cleanroom manufacturing, RoHS compliance and materials selected for oxygen compatibility and low outgassing.
Configurations
| Valve function |
2/2-way, normally open, monostable |
| Function |
Closes one fluid line when energised, reopens it on spring return |
| Seal and diaphragm material |
FFKM (PF), FKM (PV) or EPDM (PE) |
| Nominal size |
1.2 mm |
Seal material selection guide
The diaphragm and seals are the only elastomer parts in contact with your medium, alongside the PEEK fluid path. Pick the compound that matches your chemistry.
| |
EPDM (PE) |
FKM (PV) |
FFKM (PF) |
| Best for |
Aqueous buffers, culture media, alcohols, acetone, dilute acids and bases |
Mineral and silicone oils, hydrocarbons, non-polar solvents |
Nearly all chemistries, including ketones, esters, ethers, amines, strong acids and bases |
| Avoid with |
Mineral and silicone oils, hydrocarbons |
Ketones, esters, ethers, amines, methanol, strong bases |
No common laboratory restriction |
| Fluorinated carrier oils |
Suitable |
Suitable, verify long exposure to HFE grades |
Recommended |
| Media temperature [°C] |
0 to 50 (32 to 122 °F) |
0 to 50 (32 to 122 °F) |
15 to 50 (59 to 122 °F) |
| Switching time [ms] |
5 |
5 |
9 |
Concentration, temperature, and exposure time all matter. Please contact us with your media list if you want us to check it against the manufacturer's resistance data.
Each version can be ordered with or without the PEEK 1/4-28 sub-base (VABS-K1-7B-12-U14-P), which converts the flange interface into two 1/4-28 UNF flat-bottom ports for standard laboratory fittings and tubing.
Content
1x VYKA 2/2 normally open solenoid valve
1x VAVE-K1-7-5YL1-LR E-box with 50 cm twin-wire open-end cable and holding current reduction
2x M2 mounting screws
1x VABS-K1-7B-12-U14-P PEEK sub-base with 1/4-28 UNF ports (only when the sub-base option is selected)
Power supply, fittings and tubing are not included (see the Related Products).
Specifications
Main valve specifications
| Valve function |
2/2-way, normally open, monostable |
| Design |
Rocker valve with diaphragm seal |
| Orifice Nominal size [mm] |
1.2 |
| Internal volume [µL] |
16 (fluid chamber), 26 (valve with fluid connections) TO CONFIRM |
| Wetted materials |
PEEK and the selected membrane and seal material |
| Medium pressure [bar] |
-0.5 to 2 bar (-7.25 to 29 psi) |
| Water flow rate at max. operating pressure |
0.024 m³/h (0.40 L/min) |
| Operating voltage [V DC] |
12 to 26 |
Detailed valve specifications
| Festo type code |
VYKA-F7-M22U-12-PF-5YQ7 |
VYKA-F7-M22U-12-PV-5YQ7 |
VYKA-F7-M22U-12-PE-5YQ7 |
| Festo part number |
8170089 |
8170090 |
8170091 |
| Diaphragm and seal material |
FFKM |
FKM |
EPDM |
| Media temperature [°C] |
15 to 50 (59 to 122 °F) |
0 to 50 (32 to 122 °F) |
0 to 50 (32 to 122 °F) |
| Ambient temperature [°C] |
15 to 50 (59 to 122 °F) |
0 to 50 (32 to 122 °F) |
0 to 50 (32 to 122 °F) |
| Switching time [ms] |
9 |
5 |
5 |
| Outlet pressure range [bar] |
-0.5 to 0.5 (-7.25 to 7.25 psi) |
-0.5 to 1 (-7.25 to 14.5 psi) |
-0.5 to 1 (-7.25 to 14.5 psi) |
| Inlet pressure range [bar] |
-0.25 to 2 (-3.6 to 29 psi) |
| Pressure difference [bar] |
2 (29 psi) |
| Burst pressure [bar] |
23 (333.5 psi) |
| Internal volume [µL] |
16 fluid chamber, 26 with fluid connections TO CONFIRM |
| Flow rate Kv [m³/h] |
0.018 (0.3 L/min with water, 1 bar pressure difference) |
| Standard nominal flow rate [L/min] |
10 (gaseous media, to DIN 1343) |
| Water flow rate at max. operating pressure |
0.024 m³/h (0.40 L/min) |
| Housing material |
PEEK, reinforced PA, reinforced PPA |
| Wetted materials |
PEEK and the diaphragm or seal material |
| Max. particle size [µm] |
5 |
| Flow direction |
Reversible with restrictions |
| Sealing principle |
Soft |
| Type of reset |
Mechanical spring |
General specifications
| Type of actuation |
Electrical, direct piloting |
| Operating voltage [V DC] |
12 to 26, tolerance ±10% |
| Coil data [W] |
0.06 holding phase, 2.2 pull-in phase |
| Power consumption with E-box [W] |
0.3 holding phase, 3.5 pull-in phase for 60 ms |
| Duty cycle |
100% with holding current reduction |
| Max. switching frequency [Hz] |
6 |
| Insulation material class |
B |
| Electrical connection |
2-pin socket, plug pattern Q7 |
| Fluid connection |
Flange, or 1/4-28 UNF with the VABS-K1 sub-base |
| Grid dimension [mm] |
7.5 |
| Type of mounting |
Through-hole for M2 screw, any mounting position |
| Storage temperature [°C] |
-20 to 70 (-4 to 158 °F) |
| Degree of protection |
IP40 when mounted, indoor use only |
| Dimensions [mm] |
7 x 28.4 x 30 mm (0.28 x 1.12 x 1.18 in) |
| Weight [g] |
10.9 g (0.38 oz) |
| Compliance |
RoHS compliant, LABS (PWIS) conformity VDMA 24364 zone III |
Extended pressure and vacuum ranges, as well as customised fluidic and electrical interfaces, are available on request.
Documentation
VYKA operating instructions
Media-separated valves brochure
VYKA datasheet
VABS-K1 sub-base datasheet
VAVE-K1 E-box datasheet
STEP file available on request.
