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Q-ring seals are complement of the technical o-ring offer . They are applicable to sealing knots with more complex structures nodes on a more complex sealing structures and wherein tightness is required in a large pressure range- low and high. When the materials with good technical characteristics are used to execute the q-ring, then we are obtained seal with more universally applicable than the O-rings.

They can work: statically, in a reciprocating, oscillating and rotating (at low speed) as a double-acting seals. Q-ring is partially clamping with additional sealing pressure resulting from the shape , what is mainly due to the existence of elements of lip, causing more favorable, than in the o-rings, stress distribution of surface and line (peripheral). Completely symmetrical arrangement of lips arranged in a diagonal axis of the square causes that the seal is a double-acting. Stress distribution and the existence of continuous lubrication interlabial space allows the use of seals in the presence of dynamic load conditions (jumping, "peaks" and media pressure).

Application:

The biggest advantage of Q-rings is exceptional stability in reciprocating, oscillating and even torque. In these specific conditions, the O-rings twist in the building (groove), which accelerates their consumption, while the Q-rings only slightly move which does not affect their viability. It is recommended to use a Q-ring with the greatest possible cross-sections especially in dynamic applications because they can compensate for larger clearances. In the case of too large impression slots in the building and the presence of pulsating pressures should be used single releaser rings in the nodes of a single-acting and double in the nodes of a double-acting.

Detailed information available in the directory:

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Simmering seals a rotating shafts (other determinations of simmerings: Simmer seals, radial shaft seals, rings seals a rotating shafts PUWO) are ones of the most common rotation seals.

They have:

  • The outer cylindrical surface of sheet steel or elastomer which seals the ring statically in the slot as a result of the occurrence of mounting clip
  • Elastomer sealing lip pressing against the roller surface by the radial force from the spring and the lip's peripheral terminal , which is a dynamic seal
  • In some types they have dust absorption lip, enabling protection against dust and other solid contaminants.

Application:

Rings sealing rotating shafts have a wide variety of designs, due to a very wide application in many industries, and are made ​​of materials which guarantee their use in a big range of technical parameters.

Detailed information available in the directory:

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If the ring O-ring as a result of external factors is exposed to flow through the gap of the structure, should be added security called back-up ring. This takes place in the following cases:

  • high dynamic motor loads causing movement of the part of the structure with respect to the seal which as a result of the friction force and the thrust coming from the sealed fluid pressure, affects its pushing into a slot, formed by moving and fixed elements of the structure, consequently jamming.
  • the gap size exceeds the recommended value for the hardness of the rubber.
  • insufficient stiffness of the structural elements in relation to the acting external loads especially pulse causing their cyclical "swelling" and following the progressive pressing the seal into the slot.

The mechanism of insertion seal into the building gap and a method for the prevention is shown in the following drawings:


Detailed information available in the directory:

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Cords are designed primarily for sealing static and movement knots, which work as a flexible seals. Construction principles of these seals are identical as the O-ring. Prior to installation should make a lasting connection to the required size by gluing or vulcanization. An example of how to combine is shown in the figure below.

Detailed information available in the directory:

 Pobierz plik (PDF)

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