Overview
The Festo 151172 GRLA-1/4-B is a Series B generation one-way flow control valve engineered for pneumatic speed regulation in industrial applications. This valve features a G1/4 port, 0.3 to 10 bar pressure rating, and delivers 610 Lpm flow control / 450 to 820 Lpm non-return flow rate. The elbow outlet design and screw-in mounting make it a compact, direct replacement for standard pneumatic manifold systems.
Key Features
- One-way flow control function operates in one direction only (exhaust or supply air); non-return function works in opposite direction
- Brass adjusting screw with NBR seals and operating temperature range of -10 to 60°C
- Slotted head screw for manual flow adjustment; screw-in mounting design
- RoHS-compliant and commercialized manufacturing status
- Elbow outlet configuration for space-constrained installations
Technical Specifications
| Part Number | 151172 |
| Model Designation | GRLA-1/4-B |
| Series | GRLA (One-Way Flow Control) |
| Port Size | G1/4″ threaded (female inlet / male outlet) |
| Pressure Range | 0.3 to 10 bar |
| Flow Rating (Control Direction) | 610 L/min at 6 bar |
| Flow Rating (Non-Return Direction) | 450–820 L/min |
| Operating Temperature | -10 to 60°C |
| Media | Compressed air |
| Body Material | Brass trim |
| Seals | NBR (Nitrile) |
| Mounting Style | Screw-in (manifold-mounted) |
| Outlet Configuration | Elbow |
| Dimensions | 36 mm L × 20 mm W × 39 mm H |
| Certifications | RoHS compliant |
Typical Applications
Flow control and one-way flow control valves regulate pneumatic drive piston speed during advance and return strokes by restricting the flow rate of compressed air in exhaust or supply air direction. Common uses include:
- Pneumatic cylinder speed control on production lines
- Industrial automation manifold systems
- Press and clamping equipment actuation
- Assembly and handling machinery
- OEM pneumatic circuit integration
Compatibility & Replacements
Compatible With
- Festo pneumatic manifold blocks and valve terminals
- G1/4″ SAE/ISO threaded pneumatic connections
- ISO 4401-05 NG10 standard valve stacks (with appropriate adapters)
- Industrial pneumatic networks operating 0.3–10 bar
- Compressed air systems per ISO 4313
Replaces / Drop-In Replacement For
- GRLA14B — direct equivalent designation
- Previous generation Festo one-way flow control valves with G1/4 threading
Works With
- Festo PROFIBUS / PROFINET fieldbus adapters (with electronic control versions)
- ISO 1219-1 pneumatic circuit design standards
- Pneumatic logic systems and sequential controls
- Third-party PLC-based pneumatic manifold controllers
