Pro-source 4430001450PRO Breather Vent Muffler 1/4 Npt

Product Description

The PRO-SOURCE 4430001450PRO is a bronze pneumatic breather vent muffler with a 1/4 inch male NPT thread, designed to reduce exhaust noise on pneumatic valves, cylinders, and directional control valves. Constructed from bronze with a 40-micron filtration rating, it vents pressurized air while filtering particulates from re-entering the system. The compact body measures 5/8 inches in overall length and 9/16 inches in overall width, making it suitable for tight panel or manifold installations. Rated for temperatures from 35 degrees F to 300 degrees F, it handles the thermal range typical of industrial and commercial pneumatic systems. Pneumatic technicians and maintenance mechanics install this fitting as a standard exhaust port silencer.

This muffler fits standard 1/4 inch NPT exhaust ports found on pneumatic solenoid valves, air cylinders, and valve manifolds in industrial automation, HVAC controls, and fluid-handling equipment. It is suited for both stationary and mobile pneumatic circuits where exhaust noise reduction and particulate exclusion are required. The bronze construction resists corrosion in environments where moisture or mild chemicals may be present at the exhaust port.

Key Features

• 40-micron filtration rating controls particulate ingestion through the exhaust port
• Bronze construction provides corrosion resistance and durability
• 1/4 inch male NPT thread fits standard pneumatic valve exhaust ports
• Compact body: 5/8 inches overall length, 9/16 inches overall width
• Wide operating temperature range: 35 degrees F to 300 degrees F
• 9/16 inch hex size allows installation and removal with a standard wrench

Compatibility

Designed as a direct-fit replacement or new installation muffler for any pneumatic valve, cylinder, or manifold with a 1/4 inch female NPT exhaust port.

Installation Notes

Depressurize and lock out the pneumatic circuit before removing or installing any exhaust port fittings. Thread the muffler hand-tight into the valve exhaust port, then snug with a wrench to the 9/16 inch hex — do not overtighten bronze fittings, as the material is softer than steel and susceptible to thread damage. Apply thread sealant only if required by the system; many pneumatic exhaust ports do not require sealant. Verify there are no downstream back-pressure restrictions that could block the vent path after installation.