German Tri-Sure seals Tri-Sure models Tri-Sure prices

Tri-Sure seals can be divided into two main categories: static seals and dynamic seals. Static seals mainly include three types: gasket seals, sealant seals, and direct contact seals. According to working pressure, static seals can be further divided into medium and low-pressure static seals and high-pressure static seals. Medium and low-pressure static seals commonly use gasket seals made of softer materials with wider widths, while high-pressure static seals use metal gaskets made of harder materials with very narrow contact widths. Dynamic seals can be divided into two basic types: rotary seals and reciprocating seals. Others can be classified as contact seals and non-contact seals based on whether the seal contacts the components moving relative to it; they can also be divided into circumferential seals and face seals based on the seal and contact position, with face seals also known as mechanical seals. Centrifugal seals and spiral seals in dynamic sealing achieve sealing by imparting energy to the medium during machine operation, hence they are sometimes referred to as power seals.

Tri-Sure seal types

1) Extruded seals: Extruded seals, especially O rings, have been widely used in sealing applications. Other types such as X, T, D, square, and triangular shapes are suitable for different applications. The direction of improvement is to make their sealing performance stable and reliable, increase their pressure resistance, and reduce friction. They can also form combined seals with low-friction plastics such as PTFE and nylon slip rings and support rings to increase pressure resistance and reduce friction. Some manufacturers' products are permitted to reach speeds of 7.5m/s and sealing pressures of 5.6MPa. 2) Reciprocating lip seals: Reciprocating lip seals, also known as lip liners or cups, are widely used for dynamic sealing in hydraulic system reciprocating cylinders. The pressure-bearing surface of this seal is lip-shaped, with a very small interference fit during installation, allowing the lip edge to fully contact the sealing surface to create a seal. When the cylinder operates, as pressure increases, the contact force and contact area increase, thereby improving sealing. During the cylinder return stroke, pressure decreases, and the contact area and friction are lower than during the working stroke, creating a breathing action that lubricates the lip. There are many types of reciprocating dynamic seals, commonly including J, L, U, V, and Y types. There are also various combination and composite seals, such as bellows, diaphragm, and multi-lip seals. Extrusion must be prevented under high pressure by selecting materials with sufficient tear strength, hardness, and modulus, or by using support rings for protection, or by using reinforced elastomers. Seals used under high pressure, high speed, or high temperature often use composite combination seals. Their common feature is having two lips in contact with the cylinder wall. A groove is provided in the middle of the sealing area to store media, improving lubrication, reducing lip wear, and ensuring reliable sealing. Lip seals used in pneumatic systems are required to operate without oil lubrication, with specific contact pressure requirements; some integrate dust wipers with the seal structure. 3) Rotary shaft lip seals: There are no fewer than 200 varieties of similar structures, such as hydrodynamic type, inner skeleton enclosed, assembled type, outer skeleton exposed, AF type bonded with PTFE, dual-modulus return flow type, etc. The advantage of the exposed skeleton assembled type is accurate positioning, high concentricity, and good heat dissipation conditions. It is stable under pressure and vibration, resulting in a longer service life while saving rubber material. The dual-modulus return flow type applies wave seal theory; by adding a low-modulus, easily deformable material at the sealing contact point, a return flow effect is achieved, simultaneously reducing product design and mold processing costs. Joints between rigid waterproof layers and gable walls, parapet walls, and protruding roof structures should be properly treated (with flexible sealing).

Tri-Sure seal influencing factors

Hydraulic seals play a crucial role in the integrity of hydraulic and pneumatic systems. If the seals of a hydraulic or pneumatic component are not up to standard, the component itself cannot be considered a good product. Many factors affect seals. First, pressure is an important factor affecting seal quality; the level of pressure and the duration of pressure cycle changes significantly impact seal damage (such as extrusion). The higher the pressure, the greater the influence of other factors on seal performance, such as temperature, speed, seal material, clearance between piston and cylinder barrel, and clearance between piston and cylinder head. Another factor is temperature and friction. It is difficult to describe the maximum and minimum operating temperatures for a seal material because this is the result of a combination of factors. Operating temperatures for pistons and piston rods differ, so they must be selected accordingly. Another factor is the surface roughness of the seal product; surface characteristics, pressure, medium, temperature, seal material, seal type, and motion speed all influence seals. The last factor is surface treatment. Experience shows that the surface characteristics of cylinder pistons and piston rods have a significant impact on seal life. Surface characteristics are commonly defined by the RA value of surface roughness, where RA is the arithmetic mean of the absolute values of the surface profile deviations from the centerline. However, these values do not fully represent the impact of surface conditions on seals, because even at the same roughness, different surface shape characteristics can lead to varying degrees of seal wear.

Tri-Sure seal specifications and applications

1) Standard single-lip: Generally used for sealing mineral oil, water, and other media in high and low-speed rotary shafts and reciprocating motions. Standard oil seals are used in environments with less dust and impurities, resistant to media pressure<0.05MPa conditions, maximum linear speed 15m/s, reciprocating motion speed<0.1m/s. 2) Standard double-lip: In addition to the usage characteristics of the above-mentioned S type oil seals, they also provide dust protection. Standard oil seals with a dust lip can prevent dust ingress and are resistant to media pressure<0.05MPa conditions, linear speed ≤ 15m/s. 3) Springless type: Springless single-lip inner-skeleton rubber oil seals. Generally suitable for low-speed conditions where the sealing medium is lubricating grease. Linear speed ≤ 6m/s. 4) Outer-skeleton single-lip: Single-lip outer-skeleton rubber oil seals with springs, featuring a thin waist, good followability, and good rigidity. Standard oil seals are used in environments with less dust and impurities, resistant to media pressure<0.05MPa conditions. For rotational axis linear speeds ≤ 15m/s. 5) Outer-skeleton double-lip: Double-lip outer-skeleton rubber oil seals with a secondary lip, featuring a thin waist, good followability, high rigidity, and good concentricity. Standard oil seals with a dust lip can prevent dust ingress and are resistant to media pressure<0.05MPa conditions. Rotational speed ≤ 15m/s. 6) Assembled single-lip: Outer-skeleton oil seals formed by assembling inner and outer skeletons with rolled edges, featuring high installation precision, fast heat dissipation, and heavy-load characteristics. Suitable for heavy-load conditions under high temperature and high speed, media pressure ≤ 0.05MPa, maximum linear speed ≤ 15m/s. 7) Unidirectional return flow type (right-hand, left-hand): Angled ribs are manufactured on the air side of the lip, utilizing fluid dynamics principles to create a unidirectional pumping action with a return flow effect. Related to the shaft's rotation direction, the radial force is smaller than that of standard oil seals due to the return flow effect, reducing wear and heat generation, and extending service life. Suitable for media pressure<0.05MPa conditions, rotational speed ≤ 20m/s. 8) Pressure-resistant type: Short lip and short, thick waist, providing pressure resistance. Working pressure ≤ 3MPa. Suitable for conditions with media pressure ≤ 3MPa, applicable for shaft end oil seals of high-pressure pumps. Generally, the PV value ≤ 8. Rotational axis linear speed ≤ 15m/s.

Weidou Intelligent Technology professionally sells German Tri-Sure seals, Tri-Sure O-rings, Tri-Sure sealing strips, Tri-Sure pipe seals, Tri-Sure cable seals, Tri-Sure rubber seals, Tri-Sure mechanical seals, Tri-Sure gaskets, Tri-Sure oil seals, Tri-Sure shaft seals, Tri-Sure metal seals, Tri-Sure high-pressure seals, Tri-Sure spiral seals, Tri-Sure centrifugal seals, Tri-Sure sealing rings, Tri-Sure original German imports. Welcome customers to inquire and order.