Scraper seals manufacturer in China: The Primary Seal – While two of the sealing points in a seal design are simple static seals, the seal between the rotating and stationary members needs a little more consideration. This primary seal is the basis of all seal design and is essential to its effectiveness. The primary seal is essentially a spring loaded vertical bearing – consisting of two extremely flat faces, one fixed, one rotating, running against each other. The seal faces are pushed together using a combination of hydraulic force from the sealed fluid and spring force from the seal design. In this way a seal is formed to prevent process leaking between the rotating (shaft) and stationary areas of the pump. The surfaces of the seal faces are super-lapped to a high degree of flatness; typically 2-3 Helium light-bands (0.00003” / 0.0008mm). If the seal faces rotated against each other without some form of lubrication they would wear and quickly fail due to face friction and heat generation. For this reason some form of lubrication is required between the rotary and stationary seal face; this is known as the fluid film. See even more information on rod seals manufacturer.
What are Mechanical Seals? Mechanical seals are devices that accommodate a rotating shaft while containing and preventing the fluid from leaking out of the enclosed housing. While different mechanical seal designs are available for pumping applications, most have three sealing points. Rotating face that rotates with the shaft; Stationary face fitted to the pump housing; Interface portion between the rotating and stationary face of the seal. These three sealing points ensure that the fluid contained within the pump housing does not leak while also preventing dust particles in the atmosphere from entering the housing. The mechanical seals are usually made up of different materials to prevent sticking. Typically, one side of the seal uses softer materials like carbon graphite, and the other is made of harder materials such as silicon carbide or ceramic alumina. However, hard materials are preferred for both surfaces if the pumping application involves abrasive fluids. In addition to the two materials, the sealing unit also comes with O-rings to seal the stationary face on the housing side and the rotating face on the shaft side. Springs are also used to keep both faces pressed. In most cases, the two faces of the seals are also lubricated to prevent friction and wear. Depending on the application, this fluid film can either be a separate lubricant or the process fluid itself.
Due to the volume and weight limitations of the system, it is impossible to install an ideal filtration and cooling system. High temperature, high pressure, and high speed cause the hydraulic oil to deteriorate easily, and the mechanical parts are also prone to erosion and stains. There are many stains and impurities in hydraulic oil, but it cannot be thoroughly filtered, which is the aspect of endogenous stains. All kinds of dust in the working environment may be very large, and it will inevitably enter the hydraulic system in multiple ways, causing oil pollution, which is an external stain. Therefore, the sealing system is required to be resistant to stains.
Our structure is simple. Moreover, the seal is easy to manufacture and assemble. One of its remarkable features is its good adaptability to the oscillation and eccentricity of the shaft. The cavity in which it is mounted is compact in size for easy processing. It perfectly overcomes the gap issue caused by the oscillation and rotation of the sealing system when the shaft rotates, and the lip of the oil seal can always be in close contact with the surface of the shaft.
The gasket made by DMS SEALS is uniquely mechanical and thermally stable and it has excellent oxidation resistance. Compared with other thermoplastics, it can be applied to components such as valves and bushings, with higher wear resistance, higher mechanical properties and thermal fatigue resistance. At the same time, it has excellent oil resistance (alkane oil), heat resistance, water resistance, aging resistance, air tightness and excellent adhesion. It is commonly used in media such as water, oil, and natural gas.
Scraper seals are also known as wiper seals. The scraper sealof DMS SEALS can effectively prevent various forms of contamination that cause a hydraulic system failure. It can be mounted on the outside of the piston rod seal of the hydraulic cylinder to protect the hydraulic cylinder from dirt, dust and moisture. It can well protect the hydraulic cylinder from environmental pollution and effectively prevent damage to the hydraulic cylinder parts, causing the system to malfunction. DMS offers a wide range of wiper seals for different hydraulic systems with different characteristics, specifications and combinations.
Gasket sealing mechanism: The function of the gasket is caused by the blocking effect on the internal medium formed by the contact pressure of the sealing material on the joint surface and the elastic restoring force to the external tightening force. Classification and structure of gaskets: Gaskets are divided into three categories: non-metallic gaskets, non-metallic and metal combined gaskets and metal gaskets. The common materials are rubber, leather, asbestos board, cork, PTFE, tinplate, steel, aluminum, copper and stainless steel.
Support and positioning The piston and piston rod are radially supported and positioned in the cylinder barrel. Isolate the two pairs of motion pairs of piston and cylinder, piston rod and guide sleeve to prevent direct scratches, abrasions and strains between the motion pairs. Especially when the motion pairs are all steel parts, they must be isolated, otherwise they will be easily strained. The guide belt also has an important role to reduce the friction and friction work between the moving parts, reduce the ineffective work and heat. Vibration absorption and noise reduction Reduce system vibration and noise. It is mainly filled with tetrafluoroethylene and phenolic cloth, and there are also a very small amount of polyoxymethylene, nylon and soft metal. Find more information at https://www.dmsseals.com/.
We can design the suitable spring energized seals for your application. Our oil seals have TC, TB, SC, DC, TCV and so on. Looking forward to supply the best seals for you.(O Ring Manufacturers & Hydraulic Oil Seal Manufacturers). DMS SEALS, the seals manufacturer, was founded in 2008. DMS started by manufacturing filled PTFE seals, including bronze filled PTFE, carbon filled PTFE, graphite PTFE, MoS2 filled PTFE, and glass filled PTFE. We now also produce O-rings made of NBR, FKM, silicone, EPDM, FFKM.