Metal Breather Plug Miselli Series KMF – KMV
The Miselli Metal Breather Plug Series KMF – KMV is designed in brass to ensure effective venting of gearboxes and transmission components. Equipped with a flat FASIT 202 fiber gasket, it ensures optimal hydraulic sealing. The KMF series integrates a 200μ galvanized steel air filter, ideal for dusty environments. The KMV series features a one-way valve calibrated at 0.4 bar, allowing venting under overpressure while preventing impurity ingress or oil leakage.
The product known as the Miselli Metal Breather Plug Series KMF – KMV is a fundamental technical component for the proper operation of hydraulic and mechanical systems. From a structural standpoint, these specific filling and breather plugs are made using brass as the main body material, thus ensuring high mechanical reliability. Regarding the hydraulic sealing system, it is ensured through the use of a flat washer gasket. This washer is made as standard from FASIT 202 fiber. However, to meet different system requirements, the gasket is also available in aluminum upon request. The component’s construction includes two breather holes precisely positioned below the hexagon. This configuration ensures good venting flow during machine operation. Additionally, to withstand particularly aggressive external agents, a version entirely made of AISI 316 stainless steel is available upon request.
The technical variant identified as the KMF series has been specifically developed to operate in demanding conditions, particularly for applications in dusty environments. To address these conditions, the KMF version includes a protective filtering element. Specifically, this consists of a galvanized steel air filter positioned directly inside the plug. This internal element provides an indicative filtration rating of 200μ, protecting the system from external contamination.
The KMV variant represents the engineered solution for applications where venting is strictly required to occur only in the outward direction. This venting process is triggered exclusively in the presence of internal overpressure within the system. The core of this component is the action of a check valve integrated into the plug body. This valve is precisely regulated by an internal spring calibrated to approximately 0.4 bar. This one-way mechanism allows safe venting while preventing the entry of environmental impurities into the housing. At the same time, it prevents oil from escaping to the outside. The effectiveness of this system always operates in accordance with specific working conditions and the type of oil used within the system.
Metal breather plugs of the KMF and KMV series are particularly suitable for direct application on a wide range of industrial equipment. They are ideal for installation on gearboxes, variators, multipliers, gear housings, and transmission components in general. Dimensional specifications cover various standardized sizes to universally fit connections. Models KMF/14 and KMV/14 feature a G 1/4″ thread, a wrench size (Ch) of 18, height h1 of 15.5 and h2 of 9. Models KMF/38 and KMV/38 use a G 3/8″ thread, wrench size (Ch) 22, height h1 14.5 and h2 10. Finally, models KMF/12 and KMV/12 feature G 1/2″ thread, wrench size (Ch) 27, height h1 14.5 and h2 10.
Technical summary table of the main characteristics of the Miselli Metal Breather Plug Series KMF – KMV
| Feature | Value |
|---|---|
| Body Material | Brass (On request: AISI 316 stainless steel) |
| Gasket Material | Flat fiber FASIT 202 (On request: Aluminum) |
| Breather Holes | Two, positioned below the hexagon |
| Filter System (KMF Series) | Galvanized steel air filter, approx. 200μ filtration rating |
| Valve System (KMV Series) | Check valve with spring calibrated at approx. 0.4 bar |
| Recommended Applications | Gearboxes, variators, multipliers, gear housings, transmission components |
| Models G 1/4″ | Code KMF/14 – KMV/14 (Ch: 18, h1: 15.5, h2: 9) |
| Models G 3/8″ | Code KMF/38 – KMV/38 (Ch: 22, h1: 14.5, h2: 10) |
| Models G 1/2″ | Code KMF/12 – KMV/12 (Ch: 27, h1: 14.5, h2: 10) |