German Paguag seals Paguag model Paguag price

Paguag seals refer to devices that prevent fluid leakage, formed by 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 the compensation mechanism, in conjunction with auxiliary seals. When the auxiliary seal of the compensation ring is a metal bellows, it is called a bellows mechanical seal. There are mainly the following four types of components: a. Primary sealing elements: rotating ring and stationary ring. b. Auxiliary sealing elements: O-rings. c. Clamping elements: springs, thrust rings. d. Drive elements: spring seats and keys or set screws.

Paguag seal types

1) Compression seals: Compression 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 be combined with low-friction plastics such as PTFE and 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 gaskets or cups, are widely used for dynamic sealing in reciprocating hydraulic cylinders. The pressure-bearing surface is lip-shaped. During installation, there is a minimal interference fit, 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 performance. During the return stroke, pressure decreases, and both contact area and friction are lower than during the working stroke, creating a breathing effect 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 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 for protection, or by employing reinforced elastomers. Seals used in high-pressure, high-speed, or high-temperature environments often use composite combination seals. Their common feature is having two lips in contact with the cylinder wall. A groove in the middle of the sealing area can store medium, improving lubrication, reducing lip wear, and ensuring reliable sealing. Lip seals used in pneumatic systems are required to operate without oil lubrication. Contact pressure is a factor; 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-cage, assembled type, outer-cage, PTFE-bonded AF type, dual-modulus return-flow type, etc. The advantage of the outer-cage 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. By adding a low-modulus, easily deformable material at the sealing contact point, a return-flow effect is achieved, while also 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.

Paguag seal influencing factors

Hydraulic seals play a crucial role in the integrity of hydraulic and pneumatic systems. If the seals on a hydraulic or pneumatic component are inadequate, the component itself cannot be considered a quality product. Many factors affect seals. First, pressure is a significant factor influencing seal performance. The magnitude of pressure and the duration of pressure cycles greatly 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 define 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 are all factors affecting seals. Finally, 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 surface roughness value RA, where RA 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, because even at the same roughness, different surface shape characteristics can lead to varying degrees of seal wear.

Paguag seal installation technical requirements

Mechanical seals are high-precision mechanical components, and correct installation and operation significantly affect their service life. We generally follow the standards prescribed by the Ministry of Petrochemical Industry. The technical requirements for the pump and the mating parts of the mechanical seal are as follows: 1) Shaft runout: maximum not greater than 0.05 mm; 2) Rotor oscillation: near the shaft sleeve at the rotating ring seal, not greater than 0.06 mm; 3) Axial shaft movement must not exceed ±0.5 mm. If a shaft sleeve is present, it must not be loose; 4) Coupling alignment error: for gear couplings, not greater than 0.08–0.10 mm (P2008C); for elastic couplings, not greater than 0.05–0.06 mm; (common practice: face runout<0.05, radial runout<0.10) 5) Concentricity tolerance of the gland (stationary ring seat) and the sealing spigot relative to the shaft centerline is 0.05 mm. Perpendicularity tolerance of the surface contacting the gasket relative to the centerline is 0.03–0.05 mm. If requirements are not met, the seal chamber must be machined; 6) The ends of the shaft sleeve where the rotating ring seal is installed, and the ends of the gland (or housing) where the stationary ring seal is installed, should be chamfered and smoothed. 7) Exercise care when installing or removing mechanical seals. Do not use hammers or flat chisels to avoid damaging seal components. If scale prevents removal, clean thoroughly before disassembly. 8) If mechanical seals are used on both ends of the pump, coordinate during assembly and disassembly to avoid neglecting one side while attending to the other. 9) For mechanical seals that have been in operation, if the gland has loosened causing the seal to shift, the rotating and stationary ring components must be replaced. Do not simply retighten and continue use. Because after loosening, the original running track of the friction pair changes, and the sealing integrity of the contact surface is easily compromised.

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