Brass Breather Plug Miselli Series 33 A

Description

The Miselli Brass Breather Plug Series 33 A represents an advanced technical and construction solution, specially developed to keep the internal pressure of oil-bath lubricated mechanisms perfectly balanced and under strict control. This component is essential for ensuring the longevity, safety, and maximum efficiency of industrial hydraulic systems and power transmission systems.

Operating Principle of the Breather Valve

The main engineering feature of this series is the integration of an internal one-way breather valve, equipped with a metal shutter with O-Ring. This technical valve is indicatively calibrated to open at approximately 0.30 bar. Its primary purpose is to allow the rapid release of excess air and oil vapors that accumulate during the normal thermal and mechanical work cycle. This precise venting process is essential, as it prevents a dangerous increase in internal pressure inside the gearbox or any other similar device on which the plug is installed.

Construction Features and Material Selection

The product is manufactured using very high-quality materials to withstand demanding industrial environments and extend the machinery life cycle. The main body of the filling and breather plugs is entirely made of brass. Inside, the mechanism relies on a robust stainless steel spring and a sealing pad made of NBR (Nitrile Butadiene Rubber). For optimal coupling, a sealing gasket is used, which can be supplied in aluminum or in FASIT 202 or ROLLMART fiber. The upper portion of the component is covered by a protective cap made of white galvanized steel; this element performs a crucial protective action, preventing foreign bodies, dust, and contaminants from entering the hydraulic circuit.

Specific Applications and Fields of Use

The components of Series 33 A have been designed to meet the requirements of numerous industrial sectors and are particularly suitable for application on gearboxes, variators, speed increasers, gear housings, and transmission components in general. Their particular construction architecture makes them extremely high-performing even in mobile applications. In these specific dynamic contexts, the presence of the one-way valve effectively counteracts accidental oil leakage that may occur during movement phases, such as during the delicate transport operations of operating machines. The operating temperature recommended by the manufacturer to maintain physical and mechanical properties unchanged, including perfect gasket functionality, is within an operating range from -10°C to +90°C.

Technical Specifications and Dimensional Variants

To ensure the widest installation compatibility, Series 33 A is available in an extensive range of standardized hydraulic threads. The catalog options include Gas (G) threads in sizes from 1/8″ up to 1 1/2″, tapered (R) threads from 1/4″ to 3/4″, as well as a complete range of metric threads from M10x1 up to M30x2. To increase design versatility, for sizes 1/4″, 3/8″, 1/2″, and 3/4″, tapered thread versions can be supplied.

Technical summary table of the main characteristics of the Miselli Brass Breather Plug Series 33 A