Micro Solenoid Valve: Miniature Design, Specification, and Applications
Micro Solenoid Valve: Miniature Design, Specification, and Applications
A micro solenoid valve is an even smaller format than a miniature valve, used in microfluidic and portable instrumentation where every cubic millimetre of space counts. Carroland manufactures micro solenoid valves on compact ISO-aligned port geometry, supporting air and neutral liquids, as an ISO 9001-certified fluid-control supplier since 1992.
How a Micro Solenoid Valve Works
Like larger siblings, a micro valve uses a coil-driven plunger to open or close a tiny orifice. Because the body is so small, these valves are almost always direct-acting and switch in milliseconds, which suits precise dosing and sampling.
Micro vs Miniature Solenoid Valve
A miniature solenoid valve typically uses M5/M7 ports; a micro solenoid valve pushes below that to M3 and custom microfluidic ports, with far lower flow. The trade-off is flow and pressure headroom, so the choice is driven by available footprint and required flow rather than function.
Key Specification Parameters
- Port size – M3 and smaller, with manifold or SMT mount options for dense assemblies.
- Pressure range – typically 0 to 7 bar, with some ultra-low-pressure designs for sensitive instruments.
- Power consumption – often below 1 W, which suits battery and portable equipment.
- Media compatibility – PEEK, stainless, and FKM or NBR seals cover air and many neutral liquids.
- Response time – millisecond switching supports dosing, sampling, and dispensing.
Typical Applications
Micro solenoid valves appear in medical devices, analytical instruments, inkjet systems, laboratory automation, and portable analyzers where a small, low-power valve is specified. For the next size up, see our miniature solenoid valve overview, and for a full actuation guide see the solenoid valve selection guide.
Why Source from Carroland
Carroland builds micro solenoid valves on compact, ISO-aligned port geometry with consistent dimensional reports so they fit dense instrument blocks. As an ISO 9001-certified supplier with in-house tooling since 1992, we support OEM volumes and custom low-power coil options. Related options include the water solenoid valve line for liquid duty.
Frequently Asked Questions
What is the difference between a micro and a miniature solenoid valve?
Port size and flow. Miniature valves commonly use M5/M7 ports; micro valves drop to M3 and custom microfluidic ports with much lower flow. Both share the same electrical actuation principle.
What pressures can a micro solenoid valve handle?
Most micro valves are rated 0 to 7 bar, with some ultra-low-pressure designs for sensitive instruments. Confirm the rating against your supply pressure before commissioning.
What power do micro solenoid valves use?
Often below 1 W, which makes them suitable for battery and portable equipment where power budgets are tight.
What media are compatible with a micro solenoid valve?
With PEEK, stainless, or appropriate FKM/NBR seals, the same micro family covers air and many neutral liquids. Always confirm media compatibility before use.
How fast do micro solenoid valves switch?
Direct-acting micro valves typically switch in milliseconds, which suits dosing, sampling, and precise dispensing in medical and analytical equipment.