Product Overview
The SMC VNB204CS-N15A is a 2-port, air-operated process valve engineered for precise control of fluid and gas media in industrial process lines. Manufactured by SMC Corporation, a global leader in pneumatic and process automation technology, this valve utilizes a pneumatic piston actuator to drive a normally closed (N.C.) valve mechanism, ensuring fail-safe shutoff in the event of air supply loss. With a 1/2″ port size and robust construction, the VNB204CS-N15A is designed for reliable on/off control in demanding process environments, offering high flow capacity, rapid response, and long service life. Its air-operated design allows for remote actuation and integration into automated process control systems, making it an ideal solution for applications requiring dependable media isolation and flow control.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | 2-Port Air Operated Process Valve |
| Model Designation | VNB204CS-N15A |
| Manufacturer | SMC Corporation |
| Port Size | 1/2″ (N15A designation) |
| Actuation Type | Air Operated (Pneumatic Piston Actuator) |
| Valve Function | Normally Closed (N.C.) |
| Operating Pressure | Standard Industrial Grade (Up to rated bar) |
| Mounting & Connection | Standard ISO / Manufacturer Interface |
Engineering Features & Advantages
- Precision Performance: The pneumatic piston actuator delivers fast, repeatable valve actuation with precise on/off control, ensuring accurate media isolation and minimal pressure drop across the 2-port flow path.
- Industrial Reliability: Built for continuous operation under severe industrial conditions, the VNB204CS-N15A features a robust body and sealing design that withstands demanding process media and extended duty cycles.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original OEM standards, allowing seamless integration into existing SMC process valve manifolds and piping systems.
- Fail-Safe Operation: Normally closed configuration ensures automatic shutoff upon loss of air supply, enhancing process safety and preventing unintended media flow.
- Remote Actuation Capability: Air-operated design enables remote control via solenoid pilot valves, facilitating full automation within centralized process control architectures.
Typical Industrial Applications
The SMC VNB204CS-N15A is widely deployed in heavy industrial scenarios requiring reliable media control, including chemical processing and petrochemical plants for aggressive fluid handling, water and wastewater treatment systems for flow isolation, food and beverage production lines where hygienic shutoff is critical, and general industrial automation for compressed air and inert gas routing. Its robust air-operated design also suits pharmaceutical manufacturing, semiconductor fabrication, and power generation facilities where precise, fail-safe process valve performance is essential.
PRODUCT IMAGES

SMC VNB204CS-N15A 2-Port Air Operated Process Valve
âš¡ Emergency Plant Maintenance & Ready-to-Ship Notice:
- Authentic & Fully Tested: 100% bench tested for hydraulic response, pressure rating, and null-bias stability before dispatch.
- Fast Dispatch: In-stock units ready for same-day dispatch via DHL / FedEx Express directly to your plant.
- Pre-Shipment Verification: High-definition photos, video testing runs, and serial number verification provided prior to shipment.
- Peace of Mind: Covered by our 12-Month Replacement Warranty.
Shop the genuine SMC VNB204CS-N15A Solenoid Valve. This Japan-made 24 VDC hydraulic component features a 2-position, normally closed design, delivering leak-free, reliable fluid control for heavy-duty industrial systems.