German LOCTITE seals LOCTITE models LOCTITE prices

LOCTITE seals are devices that prevent fluid leakage, consisting of at least one pair of end faces perpendicular to the axis of rotation. These faces remain in contact and slide relative to each other under the action of fluid pressure and the elastic force (or magnetic force) of a compensation mechanism, in conjunction with auxiliary seals. Mechanical seals where the elastic loading mechanism and auxiliary seal are metal bellows are referred to as metal bellows seals. In light-duty seals, rubber bellows are also used as auxiliary seals; however, since the elastic force of rubber bellows is limited, springs are generally required to supplement the loading force. Mechanical seals are commonly abbreviated as "mech seals".

LOCTITE seal types

1) Squeeze-type seals: Squeeze-type seals, particularly O rings, have been widely used in sealing applications. Other types, such as X, T, D, square, and triangular profiles, are suitable for various applications. Improvements focus on stabilizing sealing performance, enhancing pressure resistance, and reducing friction. They can also be combined with low-friction plastics like PTFE or nylon sliding rings and support rings to form composite seals, thereby increasing pressure resistance and reducing friction. Some manufacturers' products are rated for speeds up to 7.5m/s and sealing pressures of 5.6MPa. 2) Reciprocating lip seals: Reciprocating lip seals, also known as lip packings or cups, are widely used for dynamic sealing in hydraulic cylinders. The pressure-bearing surface is lip-shaped, with a slight interference fit during installation to ensure full contact between the lip edge and the sealing surface. As the cylinder operates and pressure increases, the contact force and area increase, improving sealing effectiveness. During the return stroke, pressure decreases, resulting in lower contact area and friction compared to the working stroke, creating a breathing effect that lubricates the lip. There are many types of reciprocating seals, commonly including J, L, U, V, and Y profiles, as well as various composite and combination seals such as U-cup, V-ring, 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 or reinforced elastomers. Seals used in high-pressure, high-speed, or high-temperature environments often employ composite combination seals. A common feature is two lips contacting the cylinder wall, with a groove in between to store medium, improving lubrication, reducing lip wear, and ensuring reliable sealing. Lip seals for pneumatic systems are required to operate without oil lubrication. Some designs integrate a dust wiper with the seal. 3) Rotary shaft lip seals: There are no fewer than 200 varieties of similar structures, such as hydrodynamic type, inner caged, assembled, outer caged, PTFE-bonded AF type, and dual-modulus return flow type. The advantage of the outer caged assembled type is accurate positioning, high concentricity, and good heat dissipation. It remains stable under pressure and vibration, resulting in a longer service life and saving rubber material. The dual-modulus return flow type applies wave seal theory, achieving a return flow effect by adding a low-modulus, easily deformable material at the sealing contact point, which also reduces 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.

LOCTITE 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 inadequate, the component itself cannot be considered a quality product. Many factors affect seal performance. First, pressure is a significant factor; the magnitude of pressure and the duration of pressure cycles greatly influence seal damage (such as extrusion). The higher the pressure, the greater the impact of other factors on seal performance, such as temperature, speed, seal material, and the clearance between the piston and cylinder barrel, as well as between the piston and cylinder head. Another factor is temperature and friction. Defining the maximum and minimum operating temperatures for a seal material is difficult because it is the result of a combination of factors. Operating temperatures for pistons and piston rods differ, requiring distinct selections. Additionally, surface roughness, surface characteristics, pressure, medium, temperature, seal material, seal type, and motion speed all influence seal performance. Finally, surface treatment is critical; experience shows that the surface characteristics of cylinder pistons and piston rods significantly affect seal life. Surface characteristics are commonly defined by the RA value, which is the arithmetic mean of the absolute deviations of the surface profile from the centerline. However, these values do not fully represent the impact of surface conditions on seals, as different surface shape characteristics can cause varying degrees of seal wear even at the same roughness level.

LOCTITE seal functions and applications

Engine: Crankshaft - front and rear crankshaft oil seals; Valve - valve stem seals (engine repair kit o rings) (distributor oil seal, water pump oil seal, balance shaft oil seal, oil pump oil seal...); Camshaft - camshaft oil seal; Transmission: Transmission - front and rear transmission oil seals; shift lever oil seal (transmission repair kit o rings) (transfer case - front and rear transfer case oil seals); Rear Axle: Half-shaft - rear half-shaft oil seal; Differential - (front/rear) pinion oil seal; rear wheel oil seal; front wheel oil seal; steering gear oil seal (steering gear repair kit o rings); power steering oil seal (front half-shaft oil seal). Oil seals are required wherever rotating housings contain liquid lubricant and connect to the exterior. Some are made of rubber, some of metal, but most are steel-cased rubber, such as rear crankshaft oil seals, front and rear transmission oil seals, left and right half-shaft oil seals, final drive front oil seals, and air compressor crankshaft oil seals.

Weidou Intelligent Technology specializes in selling German LOCTITE seals, LOCTITE O-rings, LOCTITE sealing strips, LOCTITE pipe seals, LOCTITE cable seals, LOCTITE rubber seals, LOCTITE mechanical seals, LOCTITE gaskets, LOCTITE oil seals, LOCTITE shaft seals, LOCTITE metal seals, LOCTITE high-pressure seals, LOCTITE spiral seals, LOCTITE centrifugal seals, LOCTITE sealing rings, LOCTITE original German imports. We welcome customer inquiries and orders.