Solenoid valves switch compressed air to actuate cylinders and grippers on automated lines. Choosing the right valve affects cycle time, energy use, and maintenance. Carroland Pneumatics, an ISO 9001-certified pneumatic components manufacturer established in 1992 and a Foxconn-certified supplier for iPhone production-line clamping components, supplies IS 15867 / ISO 15552 conforming valves, FRL units, and cylinders to Indian automation plants.
Valve Types and Port Counts
- 2-way — on/off flow (supply or exhaust).
- 3-way — single-acting cylinders and pilot supply.
- 4-way / 5-way — double-acting cylinders (extend/retract ports).
- Solenoid pilot vs direct solenoid — pilot-operated handles larger flows at lower coil power.
Selection Checklist
- Match port count to actuator type (4/5-way for double-acting).
- Confirm port size and flow (Cv) against the cylinder bore and cycle rate.
- Specify coil voltage — 24 V DC is standard on Indian control panels.
- Add manual override for commissioning and fault recovery.
- Confirm environmental rating and IP class for the cabinet or field location.
Directional Valves vs Solenoid Valves
A solenoid valve is one way to drive a directional valve; for higher flow, a solenoid-pilot directional valve is common. Pair valves with an FRL unit to protect coils and seals from moisture and particulates.
India Compliance
Carroland is a China-based exporter and does not hold BIS, DPIIT, CE, RoHS, or ISO 14001 certifications. It supplies IS/ISO conformance and test reports so the Indian importer can self-certify BIS via FMCS + AIR. See the cylinder guide and BIS/PLI import guide for sourcing context.
Related Resources
- solenoid valve magnet tool
- Solenoid valve and directional control (India)
- FRL air preparation (India)
- Pneumatic cylinder guide (India)
- Pneumatic systems for 3C automation (India)
- BIS, PLI & import compliance (India)
Frequently Asked Questions
Which valve do I need for a double-acting cylinder?
Use a 4-way or 5-way directional valve so the cylinder has separate extend and retract ports; a 5-way also provides an exhaust option for each stroke.
What voltage should I specify?
24 V DC is the de-facto standard on Indian control panels for solenoid coils, offering safe control voltage and easy PLC interfacing.
Why pair valves with an FRL?
Filtered, regulated, and (where needed) lubricated air protects valve coils and seals from moisture and particulates, extending service life on dusty or humid Indian shop floors.
Does Carroland hold BIS or CE?
No. Carroland does not hold BIS, CE, RoHS, or ISO 14001. Indian customers self-certify BIS where required using supplied IS/ISO conformance and test reports.
Are Carroland valves ISO conforming?
Carroland supplies IS 15867 / ISO 15552 dimensionally conforming pneumatic components with drawings and batch test reports to support qualification.