Micro Water Solenoid Valve Manufacturer
Pinmotor manufactures compact solenoid valves for controlling water and other compatible liquids in OEM equipment.
Available options include normally open and normally closed valves, different DC voltages,
plastic or stainless-steel valve bodies, multiple seal materials and several port configurations.
Send us the liquid type, pressure, flow requirement, voltage and installation drawing.We will check whether a standard valve can be used or whether modification is required.
Micro Water Solenoid Valve Product Range
Technical Specifications
A normally closed micro water solenoid valve keeps the liquid passage closed when power is removed.
It is commonly used for:
● inlet-water shut-off
● controlled liquid dispensing
● standby leak prevention
● filling and washing cycles
This structure is normally selected when the equipment must stop liquid flow during a power failure.
A normally open valve keeps the liquid passage open when no voltage is applied.
It may be used for:
● gravity drainage
● default circulation
● cooling-liquid circuits
● emergency release
The correct operating mode should be selected according to the required valve state when the equipment is switched off.
Pinmotor micro air solenoid valves include compact vent valves, 2-way and 3-way valves, vacuum-release valves and multi-channel parallel valve assemblies. The table below summarizes the available product range; exact values depend on the valve structure, voltage and test method.
| Parameter | Available Range | Engineering Note |
|---|---|---|
| Rated Voltage | 3V / 3.7V / 4.5V / 5V / 6V / 9V / 12V / 24V DC | Available voltage depends on the selected valve series |
| Valve Configuration | Vent valve, 2-way, 3-way, vacuum valve and parallel valve assembly | Select according to the energized and unpowered air-path states |
| Operating Mode | Normally Open or Normally Closed | Defines the valve position when power is removed |
| Rated Power | Approximately 0.20–3.24W | Current and coil resistance vary with voltage and model |
| Positive Pressure | Typically up to 40kPa; selected parallel valves up to 46kPa | Confirm the maximum pressure in the actual pneumatic circuit |
| Vacuum Rating | Selected models down to approximately −60kPa | Vacuum systems require a dedicated valve structure |
| Air Port O.D. | Approximately Ø3.0–Ø8.0mm | Port size affects tubing compatibility and release performance |
| Working Medium | Air | Other gases require a separate material compatibility review |
| Pressure Release Test | Typically under 4–6 seconds | Based on model-specific 100cc, 500cc or 1500cc tank tests |
| Vacuum Release Test | Down to approximately 1 second | Available on selected vacuum valves under a specified 100cc tank test |
| Leakage | Model-dependent; commonly below 3–15mmHg/min for positive-pressure valves | Starting pressure, tank volume and valve state must be stated |
| Cycle Life | Approximately 150,000–200,000 operations | Test frequency and ON/OFF cycle differ by model |
| Operating Temperature | Typically 0–50°C | Selected larger assemblies specify 5–45°C |
| Operating Humidity | Typically 30–85% RH | Refer to the approved model specification |
| Compact Valve Weight | Approximately 9–17g | Multi-channel assemblies vary with the number of valves |
PPS and PA66 valve bodies are suitable for compact water-handling equipment where low weight and corrosion resistance are required.
Material approval should also consider water temperature, cleaning chemicals, thread load and long-term liquid contact.
304 and 316L stainless-steel options are available for systems requiring stronger wetted parts, higher temperature resistance or specific material compatibility.
The complete wetted path must be reviewed. A stainless-steel body does not automatically make every internal component suitable for the target liquid.
Test condition note: Pressure-release and vacuum-release values are tank test results, not the electrical switching time of the coil. Tank volume, tubing length, port size, fittings and starting pressure must be consistent when comparing different micro pneumatic solenoid valves.
OEM Customization Note:Specifications can be adjusted through OEM customization. Please provide your required voltage, operating pressure, valve configuration and installation dimensions. The Pinmotor engineering team will review your system requirements and recommend a suitable micro air solenoid valve model.
What Is a Micro Air Solenoid Valve?
A micro air solenoid valve is a compact electromagnetic component that opens, closes or redirects airflow inside a pneumatic device.
The valve contains a coil, plunger, spring, sealing parts and internal air passages. When power is applied, the magnetic field moves the plunger and changes the air path. When the power is removed, the spring returns the valve to its default position.
Unlike a standard industrial pneumatic valve, a micro solenoid valve air product can be installed directly inside portable and space-limited equipment.
Working Principle of Micro Pneumatic Solenoid Valves
DC voltage is applied to the coil, creating a magnetic field inside the valve. This magnetic force pulls the internal plunger toward the energized position and starts the switching process.
The plunger moves along the valve axis and changes the sealing position. Depending on the valve structure, the movement opens, closes or redirects the internal air passage.
After the plunger reaches its operating position, the required air path is established. A 2-way micro air solenoid valve controls one passage, while a 3-way valve switches between supply and exhaust.
When power is removed, the magnetic field disappears and the return spring moves the plunger back. The valve then returns to its specified normally open or normally closed state.
Engineering Advantages of Pinmotor Micro Air Solenoid Valves
Pinmotor designs each micro air solenoid valve around the equipment’s pneumatic circuit, control sequence and installation layout. This makes product integration and system testing more straightforward.
The internal air path can be arranged for pressure release, airflow isolation, supply-and-exhaust switching, vacuum release or multi-chamber control. A suitable valve layout can reduce additional tubing and external fittings.
Coil force, spring return and sealing contact are matched to the intended working conditions. The valve is checked within the complete pneumatic circuit to confirm stable opening, closing and reset performance.
Port direction, wire exit, connector position and mounting arrangement can be adapted to the equipment layout. This helps avoid sharp tube bends, restricted exhaust paths and difficult assembly.
The sealing structure keeps the inlet, outlet and exhaust passages separated during operation. This supports stable pressure holding, controlled release and vacuum switching.
Approved drawings, wiring definitions, air-path states and inspection conditions are retained as production references. This helps maintain consistency from sample approval to repeat orders.
Applications in OEM Devices
Medical Equipment Systems
Micro air solenoid valves can control inflation, exhaust and air-path switching inside medical pneumatic systems.
Typical applications include:
● Electronic blood pressure monitors — control cuff inflation and pressure release.
● Respiratory support devices — open, close or redirect internal air passages.
● Diagnostic instruments — switch airflow between sampling, testing and exhaust channels.
● IPC therapy systems — control repeated inflation and deflation of compression chambers.
Massage and Rehabilitation Systems
Micro solenoid air valves manage repeated inflation and deflation in airbag-based massage and rehabilitation products.
Typical applications include:
● Massage chairs and beds — control separate airbag zones.
● Waist and back massagers — adjust pneumatic support and release.
● Rehabilitation equipment — regulate air pressure during assisted movement.
● Foot and eye massagers — control compact internal airbags.
Pinmotor micro air solenoid valves are used in compact equipment that requires airflow switching, pressure release or vacuum control. Common applications include medical devices, massage systems, automation equipment and consumer products.
Automation and Robotics
Micro pneumatic solenoid valves can be integrated into small automated systems that require compact and repeatable air-path control.
Typical applications include:
● Miniature pneumatic actuators — control cylinder extension and return.
● Laboratory automation equipment — manage air pressure during sample handling.
● Gas sampling instruments — switch between sampling, testing and exhaust paths.
● Robotic end effectors — operate small pneumatic grippers and positioning units.
Consumer Device Integration
Micro air solenoid valves can also be used in consumer products that rely on internal airflow, pressure adjustment or vacuum control.
Typical applications include:
● Aroma diffusers — control airflow direction and operating cycles.
● Adjustable air pillows — regulate the inflation and release of internal air chambers.
● Beauty devices — manage vacuum suction or pulsed airflow.
● Smart-home products — control compact pneumatic modules inside the device.
Need a Micro Air Solenoid Valve for Your OEM Project?
Share your required voltage, valve configuration, operating pressure, port layout and installation space. Pinmotor will review your application and recommend a suitable valve model for testing and integration.
OEM Customization Capabilities
Pinmotor adapts micro air solenoid valves to the customer’s control system, pneumatic circuit and installation layout.
Electrical Configuration
Voltage, wire length, connector type and terminal arrangement can be matched to the equipment’s power supply and control board.
Air-Path Configuration
Port layout and internal passages can be configured for shut-off, exhaust, vacuum release or multi-channel control.
Mechanical Integration
Mounting points, port direction, wire exit and valve body dimensions can be adjusted to fit the available installation space.
Operating Mode
Normally open, normally closed, 2-way, 3-way and parallel valve structures are available for different control sequences.
For more valve options, visit the Micro Solenoid Valves category page or send your pneumatic diagram and installation drawing to Pinmotor for model review.
Quality Control and Certification
Each valve is inspected according to the approved drawing and project requirements.
Production Inspection
Coils, seals, springs and molded parts are checked before assembly. Finished valves are then verified for correct wiring, air-path function and assembly condition.
Batch Traceability
Inspection results and production records are retained by model and batch, supporting repeat orders and issue tracking.
Certificates and Compliance
Pinmotor operates under ISO 9001 and IATF 16949 quality-management systems. CE, FCC, RoHS, REACH and other compliance documents can be provided depending on the valve model and target market.
Frequently Asked Questions
Can this valve replace an existing solenoid valve?
Yes, but the air-path function, mounting dimensions, port position and electrical connection must match. Provide the existing valve drawing, model number or sample for comparison.
Can the valve remain energized for a long time?
It depends on the coil design and the equipment’s control cycle. Continuous energizing should be confirmed through temperature testing inside the finished device.
Why is the pressure-release speed different after installation?
Tubing length, port restriction, chamber volume and exhaust-path design all affect release speed. Valve performance should be checked in the complete pneumatic circuit.
Can the valve control water or other liquids?
Standard models are designed for air. Liquid or special-gas applications require a separate review of the valve structure and sealing materials.
Does the installation direction affect operation?
Some installations may influence plunger return, tubing layout or residual pressure. Test the valve in the same position used in the final product.
Can several valves control different air chambers?
Yes. Separate valves or a combined valve assembly can control multiple chambers independently according to the equipment sequence.
Why does the equipment lose pressure after the pump stops?
The leak may come from the valve, tubing, fittings, air chamber or assembly joints. Each section should be isolated and tested before replacing the valve.
What should be provided when reporting a valve problem?
Provide the valve model, production batch, wiring method, operating conditions, failure description, photos and test data. This helps the engineering team locate the cause faster.
Looking for the Right Micro Air Solenoid Valve?
Send us your equipment application, pneumatic diagram or current valve details. Pinmotor engineers will review your requirements, recommend a suitable valve and support sample testing before production.
