Smc Pneumatics AS3301F-N03-09 Air Flow Control Valve

Product Description

The SMC PNEUMATICS AS3301F-N03-09 is a needle-style air flow control valve designed to regulate pneumatic cylinder speed and actuator movement in compressed-air systems. It uses a tube-to-male-NPT connection configuration with a 5/16-inch tube outside diameter and a 3/8-inch male NPT thread. The valve body is molded from polybutylene terephthalate (PBT), a glass-reinforced thermoplastic well-suited for pneumatic fittings exposed to intermittent pressure cycling. Flow direction is outflow only, meaning speed control is applied on the exhaust stroke. Pneumatic technicians and maintenance mechanics are the primary installers.

This valve is suited for use in industrial pneumatic circuits where actuator speed needs to be tuned at the cylinder port or in-line within a compressed-air circuit. Typical installations include single-acting and double-acting cylinder applications in light manufacturing, automation, and process control environments. The outflow configuration makes it appropriate for meter-out speed control on pneumatic actuators. Operating temperature range is -5 degrees C to 60 degrees C, making it suitable for standard indoor industrial environments.

Key Features

• Outflow (meter-out) speed control for pneumatic actuator applications
• 5/16-inch tube outside diameter with 3/8-inch male NPT thread
• Polybutylene terephthalate body resists wear in repetitive cycling service
• NPT thread type ensures compatibility with standard North American pipe fittings
• Operating range of -5 degrees C to 60 degrees C for typical industrial environments

Compatibility

Designed as an OEM-style replacement or drop-in component for pneumatic flow and speed control applications using 5/16-inch OD tubing and 3/8-inch male NPT port connections in compressed-air systems.

Installation Notes

Installation is typically performed by a pneumatic technician or industrial maintenance mechanic. Depressurize and exhaust the pneumatic circuit completely before removing or installing any flow control valve. Use thread sealant appropriate for compressed-air service on the NPT threads; avoid over-application that could contaminate the valve internals. Confirm tube insertion depth and sleeve engagement before returning the circuit to service.