Customised dynamic seals
GUME is a manufacturer of customised dynamic seals. As such, we produce your dynamic seal individually as a customised product according to your requirements, from batch size 1 to large series.
- Customised production
- Batch sizes 1 to 1 million units.
- Express production from 2 weeks
- 100% Reliability & proactivity
Dynamic seals Directly from the manufacturer in Bavaria / Germany
Dynamic seals seal components between which a linear or rotating relative movement takes place. They have a sealing lip that rests on the mating surface to keep process media in the system and at the same time prevent the ingress of dirt, dust or moisture. Depending on the application, dynamic seals with an internal or external sealing lip are used, which seal in one or both directions and are designed for linear or rotary movements.
Customised dynamic seals are used as Rubber moulding, Silicone moulding or TPE moulded part or also as Rubber-metal connection or as Rubber-plastic connection constructed.
Dynamic sealing element for sealing translationally moving rods against media leakage and contamination ingress.
Shaft seal
Rotary seal with radial sealing lip for reliable sealing of rotating shafts against media leakage and contamination.
Rotary shaft seal
Single-acting piston seal with cup-shaped geometry for translational sealing and axial fixing in the installation space.
Pot flange
Axial rotary seal with elastic sealing lip to protect circumferential shaft areas.
V-ring
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Structure of dynamic seals
Dynamic seals, like static seals from GUME, are designed specifically for your application. Therefore, a catalogue seal usually does not fit. In these cases, a manufacturer of dynamic seals such as GUME will support you with customised seals exactly according to your drawing. The most common parameters that you can vary include
Internal and external dimensions
The dimensions such as the inner and outer diameter of a dynamic seal define the contact zone with the moving mating surface, such as a shaft or piston rod. They determine the radial preload of the seal and thus the resulting surface pressure of the sealing lip.
Tension spring
The tension spring ensures that the sealing lip presses evenly against the shaft, thus supporting a permanently reliable seal.
Protective or dust lip
The protective lip keeps dirt, dust and splash water away from the sealing point and protects the shaft seal during operation.
Stiffening insert
The metal reinforcement insert stabilises the structure of the oil seal and ensures high dimensional and shape accuracy. This supports a secure fit in the housing and ensures that the seal retains its defined geometry and function during operation.
Installation position
Internally sealing dynamic seals are used in rod seals, for example, and sit in a housing which in turn seals against the shaft. External dynamic seals, such as a piston seal, sit in a groove on the shaft and seal towards the cylinder.
Direction of sealing effect Manufacturers of dynamic seals differentiate between radial and axial sealing action. With a radial sealing effect, the seal presses against a cylindrical surface, such as a shaft, piston rod or bore, and seals off rotational relative movements. In the case of an axial sealing effect, sealing is achieved via axial surface pressure, whereby one of the sealing surfaces is moved linearly to the other.
Sealing lip
The sealing lip forms the primary sealing contact with the mating surface. It generates uniform surface pressure through elastic preload and a specific lip geometry. Parameters such as lip angle, wall thickness and contact edge influence friction, lubricating film formation, sealing effect and wear behaviour during dynamic movements.
Rubber and silicone materials for your Dynamic seals
Each of our dynamic seals is individually developed and produced according to your requirements. We are happy to advise you not only on the geometry of the seal, but also on the material used
Contact us for a material consultation for your custom dynamic seal
Dynamic seals
in the industry
Dynamic seals are used in various industries such as hydraulic and pneumatic systems, aerospace, railway technology and medical technology.
Their purpose is to reliably seal moving components against each other, to securely retain media such as air, oil or other fluids within the system, thereby ensuring the function, efficiency and lifespan of the application.
Dynamic seals in Hydraulic and pneumatic systems
In hydraulic and pneumatic cylinders, dynamic seals provide the seal between the piston, piston rod and cylinder tube. They keep pressurised media in the system and enable precise linear movements. Typical applications are industrial presses, clamping systems or handling devices where high pressures, fast movements and repeated load changes occur.
Dynamic Seals in the Aerospace industry
Dynamic seals are used in actuators, chassis mechanisms and control systems. They seal moving components in hydraulic or fuel systems and must withstand high temperatures, pressure differences and aggressive media. At the same time, high reliability, low weight and controlled friction are crucial for system performance.
Dynamic Seals in the Railway technology
In braking systems, door drives, and pneumatic controls of rail vehicles, dynamic seals ensure the reliable sealing of moving components. They must withstand wide temperature ranges, vibrations, and high load cycles. At the same time, they prevent the leakage of compressed air or hydraulic fluids and ensure the functionality of safety-relevant systems.
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Schau, wo sich dynamische und statische Dichtungen unterscheiden, sieh dir an, ob sich die Teile im Verhältnis zueinander bewegen, und wo sie sich nicht bewegen, wo keine Relativbewegung zwischen den Teilen erforderlich ist
Static seals seal components against each other when no relative movement occurs between them, such as with flanges, housings or cover joints. The sealing effect is mainly achieved by the compression of the rubber seal and sufficient surface pressure. Dynamic seals are used when components move linearly or rotationally relative to each other, for example on pistons, piston rods or shafts.
Wear is reduced in dynamic seals through several methods:
* **Material Selection:** Using wear-resistant materials such as certain polymers (PTFE, PEEK), specialised elastomers, or even ceramics in contact with the dynamic component. The material's hardness, abrasion resistance, and ability to withstand the operating environment (temperature, chemicals) are crucial.
* **Lubrication:** Proper lubrication is vital. A thin, consistent film of lubricant between the seal and the dynamic surface reduces friction and, consequently, wear. This can be achieved through the system's own fluid, a dedicated lubrication system, or by adding lubricants to the seal material itself.
* **Surface Finish of the Dynamic Component:** A smooth, well-machined and treated surface of the shaft, rod, or housing against which the seal operates significantly reduces abrasive wear. Rough surfaces act like sandpaper.
* **Seal Design:**
* **Shape:** The geometry of the seal (e.g., lip seals, O-rings, V-rings) influences the contact pressure and the area of contact, affecting wear patterns.
* **Pressure:** Reducing the pressure on the sealing element where possible minimizes deformation and wear.
* **Flexibility:** Seals need to have appropriate flexibility to maintain contact without excessive force.
* **Operating Conditions:**
* **Temperature:** Exceeding the seal's temperature limits can lead to degradation, hardening, or softening, all of which increase wear.
* **Speed:** Higher speeds generally lead to increased friction and heat, accelerating wear.
* **Contamination Control:** Preventing abrasive particles (dirt, debris) from entering the sealing system is paramount. Filtration of the fluid and the use of protective covers (e.g., bellows, wipers) can help.
* **Seal Installation:** Correct installation is important to ensure the seal functions as intended and doesn't suffer immediate damage or premature wear.
* **Surface Treatments:** Applying coatings to the dynamic component or the seal material itself (e.g., diamond-like carbon, chrome plating) can improve wear resistance.
* **Pressure Balancing:** In some complex systems, strategic pressure relief or balancing can reduce the load on the seal.
Materials with high resistance to abrasion, media and temperature (e.g. HNBR or FKM) reduce material degradation. Additionally, smooth counter surfaces, sufficient lubrication and appropriately designed compression of the sealing edge reduce friction, heat generation and thus wear during the operation of the dynamic seal.
How do dynamic seals prevent dirt ingress?
Dynamic seals prevent dirt ingress through radially pre-stressed sealing and wiper lips that bear tightly against the counter-surface. During relative movement between the shaft or piston rod and the housing, the lips mechanically wipe off particles. Additional dust lips, suitable surface roughness of the counter-surface, and a stable lubricant film reduce the ingress of abrasive particles into the tribological contact area.
What causes premature wear of seals?
Premature wear of seals often arises from unfavourable operating conditions or design flaws. Typical causes include excessive surface pressure, insufficient lubrication, unsuitable elastomer compounds, or excessively rough counter-surfaces. Contamination in the medium, incorrect installation dimensions, high temperatures, or excessive relative speeds can also significantly accelerate the tribological wear of the sealing lip.
Support rings or guide rings are needed when there is a risk of the O-ring being squeezed out of the groove due to pressure or thermal expansion.
Retaining rings are used when high pressures or larger sealing gaps occur and there is a risk of the sealing element extruding into the gap. They mechanically support the seal and increase pressure resistance. Guide rings are needed to radially guide pistons or piston rods, absorb transverse forces, and prevent direct metal-to-metal contact between moving components.
What are the benefits of custom-engineered dynamic seals?
GUME's custom-engineered dynamic seals allow for optimal tuning of geometry, material and preload to the specific application. This enables targeted reduction of friction, wear and leakage. At the same time, space constraints, pressure ranges, types of movement and media resistance can be precisely considered, thereby increasing the lifespan, operational reliability and efficiency of the entire system.
Wie schnell können individuelle dynamische Dichtungen von GUME geliefert werden?
At GUME, we have our own toolmaking department. This enables us to produce initial prototypes for express orders just 2 weeks after order placement, and to begin series production after 4 weeks. If the seal has not yet been finally developed, we are also happy to provide support through iterative processes.
