Solenoid Valve
Pilot solenoid valves for pneumatic actuator control.
Technical Specifications
| Type | 3/2, 5/2, 5/3 Way |
| Port Size | 1/4" NPT / G1/4 |
| Body Materials | Aluminum, Stainless Steel, Brass |
| Voltage | 24V DC, 110V AC, 220V AC |
| Coil Type | Explosion-proof available |
| Mounting Standard | NAMUR / In-line |
| Protection Rating | IP65, Ex-proof |
Applications
Actuator control, pneumatic systems, process automation
About the Solenoid Valve
The solenoid valve is the electrically controlled pilot device that commands a pneumatic actuator to open or close. An electromagnetic coil, when energised by an electrical signal from the DCS, PLC, or ESD system, creates a magnetic field that moves a plunger to direct compressed air to the actuator ports - driving the actuator to the commanded position. When the coil is de-energised (or on power failure), the plunger returns to its de-energised position under spring force, directing air to the opposite actuator port (double-acting) or venting actuator air (spring-return) to cause the actuator and valve to move to the fail-safe position.
Configuration is critical: 3/2-way solenoid valves have three ports and two positions - used with spring-return (single-acting) actuators to supply air in one direction and vent in the other. 5/2-way solenoid valves have five ports and two positions - used with double-acting actuators to direct air alternately to open and close ports. 5/3-way solenoid valves have five ports and three positions (open, close, and mid-position hold) - used for lock-in-last-position service or modulating actuators. NAMUR-mount solenoid valves fit directly onto the NAMUR pad on the actuator body without external tubing, eliminating external air connection leak points. ATEX-rated explosion-proof coils are mandatory for hazardous area installation. Vajra Industrial Solutions supplies NAMUR-mount and in-line solenoid valves in 24V DC, 110V AC, and 220V AC in IP65 and Ex-rated designs.
Where It's Used
Key industries and applications for the Solenoid Valve
ESD valve control
ATEX Ex d 24V DC solenoid valves on spring-return pneumatic actuators in ESD systems; normally-energised to hold valve open, de-energise on trip signal to vent actuator air and allow spring to close valve; SIL 2 rated coils available
Process automation actuator control
NAMUR-mount 24V DC or 220V AC solenoid valves on double-acting rack & pinion actuators for automated on/off ball and butterfly valves in chemical, refinery, and process plants; limit switch box mounted alongside for position confirmation
Offshore and marine platform
ATEX Ex d stainless steel solenoid valves on ESD and process actuators in classified Zone 1 hazardous areas; SS316 body resists marine atmospheric corrosion; coated coil withstands high humidity and salt spray
HVAC and building automation
compact 24V DC solenoid valves on small pneumatic actuators for chilled water, heating water, and ventilation damper actuation in building automation systems; IP65 rated for outdoor or wet plant room service
Batch and sequence control
5/2-way solenoid valves on double-acting cylinder-actuated pinch valves and diaphragm valves in batch chemical dosing and filling systems; PLC-controlled open/close sequencing with precise timing for accurate batch volumes
How to Choose the Right Solenoid Valve
Select solenoid valve configuration based on actuator action: 3/2-way for spring-return (fail-safe) actuators; 5/2-way for double-acting actuators; 5/3-way for lock-in-last-position service. Always specify normally energised (NC) for fail-open valves (solenoid energised = valve closed; de-energised = spring opens) and normally de-energised (NO) for most process control valves. For ESD applications: use de-energise-to-trip (de-energised solenoid = ESD valve closes) to ensure the valve closes on power loss. Confirm ATEX zone and gas group, coil voltage, and port size match the actuator connection.
Popular Configurations
Most commonly ordered specifications for the Solenoid Valve
Frequently Asked Questions
About Solenoid Valve - ordering, specs, delivery & compliance
What standards does the Solenoid Valve comply with?+
Our Solenoid Valve complies with API 6D, ASME B16.34, and ISO 9001:2015. All products are manufactured to international standards and come with full material test reports (MTR), dimensional inspection reports, and hydrostatic test certificates on request.
What materials are available for the Solenoid Valve?+
The Solenoid Valve is available in Aluminum, Stainless Steel, Brass. Material selection depends on your process fluid, temperature, pressure, and corrosion requirements.
What is the delivery lead time for Solenoid Valve?+
Standard stock sizes are available for immediate dispatch from our Vadodara warehouse. Custom sizes and special materials typically have a lead time of 2–6 weeks depending on specifications. We serve customers across India within 1–7 business days and export to the Middle East, Southeast Asia, Europe, and the Americas with full export documentation.
Can I get a custom Solenoid Valve for a specific application?+
Yes. Vajra Industrial Solutions supplies custom-engineered accessories for specific process conditions. Submit your technical requirements - including pressure class, temperature range, fluid type, end connections, and any special trim or coating needs - via our RFQ form or WhatsApp, and our engineering team will respond within 24 hours.
What pressure ratings are available for the Solenoid Valve?+
The Solenoid Valve is available in pressure ratings of PN10 to PN400 (ANSI Class 150 to Class 2500). Higher-pressure classes are available for critical service applications in oil & gas, power generation, and chemical processing.
How do I request a quote for the Solenoid Valve?+
You can request a quote by clicking the "Request Quote" button on this page, filling out our RFQ form at vajravyuh.com/rfq, emailing us at sales@vajravyuh.com, or WhatsApping us directly at +91-9979774557. Please include quantity, size, pressure class, material grade, and end-connection type for the fastest response.
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