Overview

The SMC VHS30-N03-Z pressure relief valve is a manual, lockable 3-port design built for controlled pressure isolation in pneumatic systems. This valve delivers reliable performance in industrial automation, pneumatic circuits, and maintenance applications where safe depressurization is critical. The robust aluminum die-cast construction ensures durability across demanding industrial environments.

Key Features

• 3-Port Configuration: Convenient manual control with two 3/8" NPT ports for flexible integration into existing pneumatic systems
• Manual Lockable Design: Integrated locking holes allow the valve to be locked in the exhaust position for energy isolation and maintenance safety
• Aluminum Die-Cast Body: Lightweight, corrosion-resistant construction rated for compressed air applications
• Easy Identification: PSI labeling and handle orientation provide clear airflow direction indication
• Single Action Operation: Spring-detent actuator with straightforward manual return for reliable, repeatable performance

Technical Specifications

• Part Number: VHS30-N03-Z
• Manufacturer: SMC
• Series: VHS
• Valve Type: 3-Port Pressure Relief, Single Action, Manual Lockable
• Port Size: 3/8" NPT (Female)
• Body Size: 30
• Body Material: Aluminum Die-Cast
• Thread Type: NPT
• Pressure Unit Display: PSI
• Weight: 0.70 lbs
• Media: Compressed Air

Typical Applications

• Pneumatic system isolation during maintenance and servicing
• Energy lockout/tagout (LOTO) procedures for plant safety compliance
• Residual pressure relief in automated control circuits
• Integration with FRL assemblies and modular pneumatic networks
• Industrial automation equipment requiring pressurized air control

Compatibility & Replacements

Compatible With

• Standard pneumatic systems operating on compressed air
• 3/8" NPT female port connections
• Modular pneumatic spacers and FRL assemblies
• Industrial automation and motion control equipment
• OSHA-compliant energy isolation systems

Replaces / Drop-In Replacement For

• VHS30-N03-Z-D (pressure-regulated variant)
• Other SMC VHS 3-port series valves in the body size 30 range
• Verify compatibility with your system integrator before ordering

Works With

• Compressed air networks and pneumatic control systems
• Manual and automated lockout/tagout procedures
• SMC modular pneumatic components and assemblies
• Standard industrial pneumatic protocols and installations