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A piston seal is a part that is typically used in pneumatic, hydraulic, and mechanical equipment to provide a seal between the piston and the cylinder. Its primary purpose is to keep liquids or gases from seeping through the space between the cylinder and the piston. In order to guarantee appropriate system operation, piston seals are made to offer dependable sealing performance.
Piston seals are usually comprised of elastomeric materials such as rubber or polymer. Depending on the demands of the design and the many applications, they can have a variety of shapes and structures. O-shaped, square, V-shaped, and U-shaped piston seal shapes are frequently seen. To guarantee sealing contact, these sealing rings can be positioned in the cylinder’s grooves or on the piston.
FKM rubber seals are vital in automotive rear shock absorbing systems to ensure fluid leakage and proper operation. These seals are resistant to high temperatures, oils, chemicals and weathering. They can withstand temperatures up to 200°C without significant deformation or failure. FKM rubber seals also provide reliable sealing performance with low compression set and low leakage rate, making them suitable for various industrial environments and harsh weather conditions. FKM rubber seals provide reliable and long-lasting sealing performance despite differences in vehicle manufacturers and seal designs.
The piston seal is a key component of the rear shock absorber, ensuring that the shock absorber fluid effectively seals the sealing chamber during piston movement. Its main function is to prevent liquid leakage and maintain the sealing performance of the seal. Common piston seals are usually made of elastic materials such as rubber or polyurethane, which have the characteristics of good sealing performance, wear resistance, oil resistance, elasticity and resilience, and high temperature resistance. These features ensure that the shock absorber remains in optimal working condition over long periods of use.
The piston rod seals are one of the main pressure-bearing components in the hydraulic cylinder. It bears pressure in one direction, bears high pressure, and directly contacts the hydraulic oil. The piston rod seals are installed in the dust-proof seal inside the end cover of the hydraulic cylinder to prevent hydraulic oil leakage. It is required to have good pressure holding performance in a static state, high pressure bearing in motion, good sealing performance, small friction coefficient, and strong extrusion resistance.
Double acting piston seals are rubber seals used in double-acting hydraulic cylinders to prevent hydraulic oil leakage and maintain pressure stability. They are certified by ISO 9001, ASTM D2000/DIN 7715, and REACH and RoHS. These seals offer excellent sealing performance, wear resistance, and wide adaptability, making them suitable for various industrial fields. They also have strong dynamic sealing ability, reducing friction and leakage, and improving system efficiency. They also prevent contamination, guide and support the piston rod, and reduce wear and energy loss.
PTFE Piston Static Seal Energized by Spring is a type of sealing solution that is used in hydraulic and pneumatic systems. It consists of a PTFE (polytetrafluoroethylene) piston ring that is energized by a spring. The PTFE material provides excellent resistance to high temperatures and corrosive chemicals, making it a popular choice for critical applications.
Piston T-Seals refers to the seal between the cylinder and the piston. A poor seal can affect the performance of the cylinder. The seal groove is placed on the piston. The piston seal is the main seal in the hydraulic cylinder, and the pressure is bidirectional. Piston seal belongs to reciprocating seal, it is one of the key components in hydraulic equipment. Leaking pistons can cause operational problems and environmental pollution.
A pneumatic cylinder piston seal is a rubber part used to seal the piston in a cylinder, preventing gas or liquid leaks and contaminants from entering the equipment. It is made of rubber and has various sizes and materials. It has ISO 9001 and ISO/TS 16949 certifications, and is certified by the American Society for Testing and Materials and the Society of Vehicle Engineers. The seal’s advantages include increased efficiency, extended life, reduced leakage, enhanced controllability, and strong adaptability.
Pneumatic drive air compressor piston rings are crucial parts of air compressors, ensuring gas leakage and maintaining steady gas pressure. These rings, which are approved by RoHS, REACH, ASTM D2000, and ISO 9001, are made of rubber. These rings reduce wear and friction while providing sealing performance, chemical resistance, high temperature resistance, and wear resistance. They guarantee efficient gas compression as well. Through material selection, process control, and equipment maintenance, Linde Polymer guarantees the quality of its materials. Size, hardness, temperature resistance, wear resistance, and other characteristics are standardized to meet quality requirements. Information about manufacturing batches, raw materials, and production processes are tracked in order to ensure traceability. Customer feedback and quality data are used to promote continuous improvement, which improves piston ring performance and the production process.
Syringes are one of the indispensable tools in medical, health care and other fields, and medical syringe piston seals are important components in syringes.
PTFE piston seal is a seal used between the piston rod and the cylinder, usually made of PTFE material.
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A typical sealing tool used in sealing applications between the piston and the cylinder to stop liquid or gas leaks is the piston seal.
There are numerous varieties of piston seals, such as O-ring seals, V-shaped seals, U-shaped seals, two-way seals, etc. To accommodate various application circumstances and sealing needs, each kind has a unique construction and operating principle.
O-ring closure
One of the most popular kinds of piston seals is the O-ring. It offers superior sealing performance in both static and dynamic applications thanks to its round cross-section. O-rings are simple to install and replace and come in a range of media and temperature ranges.
Shaped seal
With a U-shaped cross-section, the U-shaped seal can offer superior compression resistance and sealing performance. It is frequently employed to stop liquid or gas leaks in high-pressure pneumatic and hydraulic systems.
V-shaped seal
A V-shaped seal has a V-shaped cross-section and is also referred to as a V-ring or V-shaped packing. It is appropriate for sealing applications under high pressure and high temperature circumstances because of its broad sealing contact area and superior sealing performance.
Dual-phase sealing
Typically, bidirectional seals are made up of two symmetrical sealing parts that work together to simultaneously seal the piston on both sides. Applications like bi-directional hydraulic cylinders that need to be protected against piston leakage in both directions can employ this kind of seal.
Seal made of pneumatics
Piston seals made specifically for use in pneumatic systems are known as pneumatic seals. To handle higher working pressures and high-speed pneumatic movements, they typically employ unique materials and constructions.
Elastic materials with strong wear resistance, chemical corrosion resistance, and high temperature resistance, such as polytetrafluoroethylene (PTFE), nitrile rubber (NBR), and fluorine rubber (FKM), are typically used in piston seals. The right material selection is influenced by a number of variables, including the operating temperature, media, and sealing environment.
Excellent sealing materials with outstanding chemical, high temperature, and oil resistance include fluorine rubber (FKM) Viton. It is frequently employed in applications requiring high temperatures and chemical resistance for piston sealing.
Rubber Butadiene Nitrile (NBR) A popular and reasonably priced sealing material with good abrasion and oil resistance is nitrile butadiene rubber. It is appropriate for piston sealing in low- to medium-temperature environments as well as general industrial applications.
Rubber butyl (IIR)
One material that has good gas and liquid barrier qualities is butyl rubber. It is frequently utilized in piston sealing applications to stop liquid leaks and gas penetration.
PTFE, or polytetrafluoroethylene
PTFE is a temperature- and chemical-resistant substance with minimal friction. When corrosion resistance and high temperature sealing are necessary, it is frequently employed in piston sealing applications.
Polyurethane (PU)
Strong and resilient, polyurethane has excellent sealing qualities and is long-lasting. It works well in high-pressure hydraulic systems for piston sealing.
Rubber silicone (VMQ)
Silicone rubber is a great material for high temperature sealing and piston sealing in electronic equipment because of its exceptional electrical insulation and high temperature resistance.
One or more sealing rings, which can be mounted on the piston or in the seal seat, are typically found in piston seals. Sealing performance and durability are guaranteed by the sealing ring’s shape and structural design.
The structural designs of piston seals frequently change depending on the demands of a certain application and sealing performance standards. A thorough explanation of a few typical piston seal structures is provided below
Rubber silicone (VMQ)
Silicone rubber is a great material for high temperature sealing and piston sealing in electronic equipment because of its exceptional electrical insulation and high temperature resistance.
Single sealing ring
This is the simplest piston seal structure, consisting of a complete sealing ring. The sealing ring can be installed directly on the piston or in the seal seat, providing one-way or two-way sealing function.
Double body sealing ring
Double-body sealing rings consist of two half-rings and can be installed on the piston or in the seal seat. This structure can achieve better sealing effect and pressure resistance, and is suitable for high-pressure sealing applications.
Rubber-based sealing ring
Typically, elastomeric sealing rings are made of a metal spring with an elastic covering over it. To guarantee sealing performance, the spring applies pressure to bring the sealing ring and piston or sealing seat into close contact. Applications involving dynamic sealing and high-speed piston motion are appropriate for this construction.
Adhesive tape
A strip of seal that encircles the piston or is contained within the seal seat is called a sealing tape. Typically, it is composed of flexible materials that offer improved sealing performance and a greater sealing contact area.
Combined seals
rings, V-shaped seals, and U-shaped seals are a few examples of the various sealing elements that are combined to create composite seal structures. Depending on certain sealing needs, this structure can offer a more thorough sealing solution andworking conditions.
The primary purpose of a piston seal is to keep gas or liquid from leaking out while maintaining steady sealing performance. Sealing performance evaluation indicators include wear resistance, pressure resistance, and sealing efficiency.
In many different industrial domains, including automotive engines, pneumatic equipment, hydraulic cylinders, air cylinders, and hydraulic systems, piston seals are extensively utilized. Its primary duties are to guarantee the system’s regular operation and lower the possibility of leaks.
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