{"id":11833,"date":"2026-04-29T11:55:47","date_gmt":"2026-04-29T09:55:47","guid":{"rendered":"https:\/\/lubeteam.it\/prodotto\/miselli-breather-plug-series-tmd-tmdf\/"},"modified":"2026-05-04T16:33:51","modified_gmt":"2026-05-04T14:33:51","slug":"miselli-breather-plug-series-tmd-tmdf","status":"publish","type":"product","link":"https:\/\/lubeteam.it\/en\/product\/miselli-breather-plug-series-tmd-tmdf\/","title":{"rendered":"Miselli Breather Plug Series TMD – TMDF"},"content":{"rendered":"

The Miselli Breather Plug Series TMD – TMDF is an essential component for hydraulic systems, entirely made of thermoplastic material, specifically Polyamide 66<\/span><\/span>. <\/span>This engineering choice provides the plug with excellent mechanical strength, long-term dimensional stability, and high impact resistance<\/span><\/span>. <\/span>From a thermal standpoint, the component is designed to operate within an extremely versatile temperature range, from -30\u00b0C to +100\u00b0C<\/span><\/span>.<\/span><\/p>\n

The external structure features a cylindrical head equipped with vertical lobes<\/span><\/span>. <\/span>This particular configuration ensures an ergonomic and secure grip, facilitating manual tightening operations by installation technicians<\/span><\/span>. <\/span>Hydraulic sealing is ensured by an O-Ring gasket made of oil-resistant rubber with 70 Shore hardness, effectively preventing leaks and seepage at the base of the thread<\/span><\/span>. <\/span>Aesthetically, the standard series features a black body and a red cap marked with the oil filling symbol and the standard wording OIL<\/span><\/span>.<\/span><\/p>\n

Operating Principle and Air Flow Rate<\/h3>\n

The plugs belonging to the TMD and TMDF series ensure a high air flow rate within fluid systems<\/span><\/span>. <\/span>The airflow passes through four vent sections strategically positioned under the thread and an additional six sections located beneath the grip<\/span><\/span>. <\/span>This structural design allows the rapid intake and release of large volumes of air, optimally compensating for level and volume variations of the fluid within the hydraulic system<\/span><\/span>.<\/span><\/p>\n

Variants and Filtration Systems<\/h3>\n

The range includes several versions to meet specific operational needs. <\/span>The base TMD model is the standard solution for simple venting, without internal filtering elements<\/span><\/span>. <\/span>The TMDF variant, on the other hand, incorporates an integrated air filter made of reticulated polyester-based polyurethane foam (PPI 60)<\/span><\/span>. <\/span>This solution is essential when the system operates in industrial environments with high concentrations of airborne dust<\/span><\/span>. <\/span>Maintenance operations are greatly simplified by the ability to quickly remove the filter for cleaning or replacement, simply by manually extracting the upper red cap<\/span><\/span>.<\/span><\/p>\n

For more critical hydraulic applications, the TMDF\/BR version is available<\/span><\/span>. <\/span>This model uses a metallic air filter made of sintered bronze with an indicative filtration grade of 30 microns<\/span><\/span>. <\/span>The bronze filtering element allows regular airflow but, due to its non-absorbent nature when in contact with fluid, physically prevents lubricant from escaping \u0627\u0644\u062e\u0627\u0631\u062c<\/span><\/span>.<\/span><\/p>\n

Applications and Sectors<\/h3>\n

The primary field of application includes hydraulic power units and tanks containing liquids subject to rapid volume changes<\/span><\/span>. <\/span>The standard TMD model is suitable where large volumes of air intake or release are required, provided the plug is not exposed to direct oil splashes<\/span><\/span>. <\/span>Conversely, the TMDF\/BR variant is the recommended technical choice for applications where the breather is subjected to strong and continuous fluid splashes, a condition typically occurring during machine start-up phases when the oil still has high viscosity at low temperatures<\/span><\/span>.<\/span><\/p>\n

Various thread sizes are available, ranging from standard Gas connections (from G3\/8 to G1 1\/2) to metric threads (from M14x1.5 to M22x1.5)<\/span><\/span>. <\/span>Additional customization options on request include yellow caps with GASOIL or DIESEL markings for versions 114-112, and the possibility of implementing tapered NPT threads (sizes from 1\/4″ to 1″) for specific assembly configurations<\/span><\/span>.<\/span><\/p>\n

Technical Summary Table<\/h3>\n

Technical summary table of the main characteristics of the Miselli Breather Plug Series TMD – TMDF<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Feature<\/th>\nValue<\/th>\n<\/tr>\n<\/thead>\n
Plug Body Material<\/td>\nThermoplastic material (Polyamide 66)<\/td>\n<\/tr>\n
Sealing Gasket<\/td>\nOil-resistant rubber O-Ring 70 Shore<\/td>\n<\/tr>\n
Operating Temperature<\/td>\nFrom -30\u00b0C to +100\u00b0C<\/td>\n<\/tr>\n
Filtering Element (TMDF Series)<\/td>\nReticulated polyester-based polyurethane foam (PPI 60)<\/td>\n<\/tr>\n
Filtering Element (TMDF\/BR Series)<\/td>\nSintered bronze<\/td>\n<\/tr>\n
Filtration Grade (TMDF\/BR)<\/td>\n30 microns (indicative)<\/td>\n<\/tr>\n
Tightening<\/td>\nManual (Cylindrical head with vertical lobes)<\/td>\n<\/tr>\n
Available Standard Threads<\/td>\nMetric (M14x1.5 – M22x1.5) and Gas (G3\/8 – G1 1\/2)<\/td>\n<\/tr>\n
Threads on Request<\/td>\nTapered NPT (1\/4″, 3\/8″, 1\/2″, 3\/4″, 1″)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

The Miselli Breather Plug Series TMD – TMDF is a Polyamide 66 component designed to withstand temperatures from -30\u00b0C to +100\u00b0C<\/span><\/span>. <\/span>Equipped with a cylindrical head with vertical lobes for practical manual tightening and a 70 Shore O-Ring seal<\/span><\/span>. <\/span>Optimizes air management in hydraulic power units subject to rapid volumetric changes<\/span><\/span>. <\/span>Integrated versions offer polyurethane filtration for dusty environments or sintered bronze for resistance to intense oil splashes<\/span><\/span>.<\/span><\/p>\n","protected":false},"featured_media":11755,"template":"","meta":[],"product_brand":[],"product_cat":[98,452],"product_tag":[258],"class_list":{"0":"post-11833","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-accessories-for-hydraulic-power-units","7":"product_cat-filler-and-breather-caps","8":"product_tag-miselli","10":"first","11":"instock","12":"shipping-taxable","13":"product-type-simple"},"yoast_head":"\nMiselli Breather Plug Series TMD - TMDF \u2013 LubeTeam Hydraulic<\/title>\n<meta name=\"description\" content=\"Miselli Breather Plug Series TMD - TMDF in Polyamide 66 with O-Ring seal. 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