Legris 0674 00 21 Pneumatic Muffler 306 Cfm 1/2 Bspp

Product Description

The LEGRIS 0674 00 21 is a pneumatic exhaust muffler designed to reduce noise at the discharge port of pneumatic valves, cylinders, and directional control equipment. Constructed from polyethylene, it threads directly into 1/2 inch BSPP ports and provides a flow capacity of 306 CFM while attenuating exhaust noise to 84 dB. The overall length is approximately 3.07 inches (78 mm) with a body diameter of approximately 0.93 inches (23.5 mm). It is installed by pneumatic system technicians and maintenance mechanics in industrial and manufacturing environments where exhaust noise control is required.

This muffler is suited for use in compressed-air pneumatic systems operating within a temperature range of -14 degrees F to 175 degrees F. Typical applications include exhaust ports on solenoid valves, foot valves, manual valves, and pneumatic actuators found in production lines, automation equipment, and general industrial pneumatic circuits. The 1/2 inch BSPP thread size is common in European and international pneumatic component standards.

Key Features

• 306 CFM flow capacity supports high-cycle pneumatic valve exhaust applications
• 84 dB noise attenuation reduces exhaust sound at the discharge port
• 1/2 inch BSPP thread for direct installation into standard BSPP-ported components
• Polyethylene construction resists moisture and light chemical exposure
• Compact 3.07-inch overall length minimizes space requirements in tight panel layouts
• Rated for operating temperatures from -14 degrees F to 175 degrees F

Compatibility

Designed as a direct-thread replacement muffler for 1/2 inch BSPP exhaust ports on pneumatic valves, cylinders, and manifolds in industrial compressed-air systems.

Installation Notes

Installation requires depressurizing the pneumatic circuit completely before removing or replacing any exhaust-port component. Thread the muffler in by hand first to confirm alignment, then tighten with an appropriate wrench — avoid overtightening polyethylene-bodied fittings, as excessive torque can crack the housing. Verify the BSPP thread standard matches the receiving port before installation, as BSPP and NPT threads are not interchangeable. This work is typically performed by industrial maintenance mechanics or pneumatic system technicians.