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Rotary Seal, outside sealing DS-A

Rotary Seal, outside sealing DS-A

Rotary Seal, outside sealing DS-A

Product catalog summary
Overview: The document provides technical specifications and installation guidelines for the DS-A rotary seal, designed for sealing rotating components with an outside sealing mechanism. It highlights the design features, material recommendations, and installation procedures.
Specifications: The DS-A rotary seal is compact and includes axial lubricant grooves from a profile width of 3.9 mm to ensure adequate lubrication at higher speeds. The gap between rotor and stator must be smaller than that of the RDA type due to the seal design. The DS-I type is preferred over DS-A for its larger static contact surface. The running surface should be hardened to approximately 56 HRC or hard chromium plated depending on specifications and operating conditions.
Materials and Application Range: The document lists materials such as PTFE compounds and alternatives like FFKM, VMQ, and FPM. The seal is suitable for rotary feed units with minimal installation space and low friction, without support rings, allowing for smaller versions and simple installation.
Design Hints and Surface Finish: The document provides guidelines for surface quality, specifying Ra and Rt values for sliding surfaces, groove base, and groove sides. It emphasizes the importance of proper surface finish for optimal performance.
Installation Procedure: The O-ring is inserted into the groove, and the sealing thrust ring is positioned using a round-shafted screwdriver or a strip of clean cotton cloth. For diameters smaller than 100 mm, the PTFE-Compound thrust ring should be heated to approximately 100°C and inserted over the O-ring. Resizing may be necessary using a sizing sleeve. The sealing set should be installed without lubrication, except on the sliding surface of the slide ring.
Order Example and Design Table: An example order for a standard version is provided, along with a design table detailing bore diameter, groove diameter, seal width, groove width, and maximum gap size for various pressure ranges.
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Catalog excerpts

Rotary Seal, outside sealing DS-A-1

Rotor-Dichtsatz, außendichtend Rotary Seal, outside sealing Rotor-Dichtsatz, außendichtend Rotary Seal, outside sealing Der schmalbauende Rotordichtsatz DS-A ist speziell für die Abdichtung drehender Maschinenteile ausgelegt. The space-saving rotary seal type DS-A is designed specifically for sealing rotating components. Ab Profilbreite 3,9 mm verfügt er über axiale Schmierstoffnuten in der Lauffläche, die auch bei höheren Drehzahlen einen ausreichenden Schmierfilm gewährleisten. From profile width 3.9 mm it has axial lubricant grooves in the slide ring surface which guarantee sufficient lubrication at higher speed. Werkstoffbedingt müssen die Spaltverhältnisse zwischen Rotor und Stator enger sein als beim Typ RDA ausgelegt werden. The gap between rotor and stator must be smaller than that of the RDA due to the seal design. Der DS-I weist eine größere statische Haftfläche auf und ist daher dem DS-A vorzuziehen. The DS-I is to be preferred to the DS-A due to its greater static contact surface. Je nach Anforderung und Betriebsbedingungen empfiehlt sich eine Behandlung der Gegenlauffläche, wie z. B. Härten auf ca. 56 HRC oder Hartverchromen. Depending on the specification and operating condition it is recommended to have the running surface hardened to approx. 56 HRC or hard chromium plated.

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Rotary Seal, outside sealing DS-A-2

Rotor-Dichtsatz, außendichtend Rotary Seal, outside sealing Materials elastischer Grundkörper FP M slide ring various PTFE-compounds Application Range elastic ring standard hydraulic oils Design Hints Surface Finish Surface Quality Sliding Surfaces Groove Base Groove Sides Nachdem der O-Ring durch einfache Überziehmontage in die Nut eingelegt ist, wird der Gleitring mit Hilfe eines gut abgerundeten Schraubendrehers oder bei längerem Montierweg mit einem durchgezogenen Baumwolltuch (von Nut zu Nut) aufgezogen und auf dem O-Ring positioniert. Bei Durchmessern kleiner als 100 mm empfiehlt es sich,...

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Rotary Seal, outside sealing DS-A-3

Rotor-Dichtsatz, außendichtend Rotary Seal, outside sealing gerundet u. poliert rounded and polished elastischer Grundkörper / elastic ring Gleitring / slide ring Bestellbeispiel für Standardausführung: Order Example for standard version: Bohrungs-Ø Nutgrund-Ø bore Ø groove Ø DH8 DichtungsNutbreite breite groove width seal width b b1+0,2 Design Table

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