Legris 0674 00 27 Pneumatic Muffler 370 Cfm 3/4 Bspp

Product Description

The LEGRIS 0674 00 27 is a pneumatic exhaust muffler designed to reduce noise at compressed air exhaust points in pneumatic systems. It threads directly into exhaust ports on valves, cylinders, and manifolds to attenuate discharge noise to 84 dB while allowing up to 370 CFM of airflow. The body is constructed from polyethylene, keeping weight low and providing adequate resistance to most ambient shop environments. Overall length is 131 millimeters and outer diameter is 38.5 millimeters. Licensed HVAC, pneumatic, and industrial maintenance technicians install this type of component as part of routine valve and actuator service.

This muffler is suited for use on pneumatic control valves, directional control valves, cylinders, and solenoid valve exhaust ports that use a 3/4 inch BSPP threaded connection. It is appropriate for both light industrial and commercial compressed air systems operating within a temperature range of -14 degrees F to 175 degrees F. Typical applications include machine control panels, automated assembly equipment, and process control pneumatics where exhaust noise at the valve stack must be managed to meet shop floor noise requirements.

Key Features

• 84 dB rated exhaust noise attenuation at the valve or cylinder exhaust port
• 370 CFM flow capacity supports high-cycle pneumatic valve applications
• 3/4 inch BSPP thread for direct port installation without adapters on compatible valves
• Polyethylene construction resists corrosion and keeps component weight minimal
• Operating temperature range of -14 degrees F to 175 degrees F covers most indoor industrial environments
• Compact form factor at 131 millimeters long and 38.5 millimeters diameter for use in tight valve enclosures

Compatibility

Designed as a direct-thread exhaust muffler for pneumatic valves and actuators equipped with a 3/4 inch BSPP exhaust port. No specific compatible model numbers were provided in the product data.

Installation Notes

Depressurize the pneumatic circuit completely before removing any exhaust fitting or installing this muffler. Hand-thread the muffler into the exhaust port first to confirm thread engagement before applying a wrench, as BSPP is a parallel thread that relies on a sealing face or thread sealant rather than taper for a pressure-tight fit. Do not overtighten into plastic or aluminum valve bodies. Installation is typically performed by industrial maintenance technicians or pneumatic system mechanics familiar with compressed air distribution and valve service.