Overview
The SMC VHS40-N06-Z is a 3-way pressure relief and lock-out valve from SMC’s VHS series. This manually operated safety valve is designed to prevent accidents caused by residual pressure in pneumatic lines during equipment maintenance and servicing. The valve includes a locking hole that allows operators to secure the handle with a padlock, preventing accidental re-pressurization while work is in progress.
Key Features
- OSHA-compliant design for workplace safety standards
- Manual lock-out function with padlock mounting hole
- 3-port configuration for supply, exhaust, and outlet control
- 2-step push-and-turn handle action prevents accidental operation
- Visual flow status indicator—supply and exhaust states visible at a glance
- Aluminum die-cast body for durability and lightweight design
Technical Specifications
| Manufacturer | SMC |
| Model Number | VHS40-N06-Z |
| Series | VHS (VHS20/VHS30/VHS40/VHS50) |
| Valve Type | 3-Port Pressure Relief with Lock-Out |
| Port Size | 1/2 in. NPT (3/4 in. nominal) |
| Pressure Range | 0.1 to 1 MPa (approx. 15 to 145 psi) |
| Operating Temperature | –5 to +60 °C (23 to 140 °F) |
| Body Material | Aluminum die-cast |
| Actuation | Manual handle with 2-step push-and-turn |
| Locking Feature | Padlock-compatible mounting hole |
| Compliance | OSHA Standard |
| Condition | New – No Box |
Typical Applications
- Energy isolation and lock-out during preventive maintenance
- Machine tool and press servicing
- Compressed air system safety during equipment cleaning
- Pneumatic machinery shut-down and depressurization
- Industrial automation safety procedures
- OSHA-mandated Energized Work Permit compliance
Compatibility & Replacements
Compatible With
- Pneumatic systems operating 0.1–1 MPa (15–145 psi)
- Standard 1/2 in. NPT (or 3/4 in. nominal) piping systems
- Compressed air networks in industrial facilities
- FRL (Filter-Regulator-Lubricator) unit combinations
- OSHA-regulated maintenance and lock-out procedures
Replaces / Drop-In Replacement For
- VHS40-N06A-Z (identical function, alternate handle configuration)
- VHS40-N06B-Z (similar valve with alternative options)
- Other VHS40 series variants with matching port size and pressure rating
Works With
- Manual pneumatic control systems
- Compressed air safety and isolation circuits
- Industrial lock-out/tag-out (LOTO) programs
- Standard piping thread adapters and manifold systems
- SMC air treatment and control components
