Kastaş Sızdırmazlık Teknolojileri
Kastaş is one of the world’s leading manufacturers of high-performance fluid-power sealing products and innovative sealing solutions, with a global sales network.
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Products
K19 Heavy-Duty Piston Seal
K19 is a heavy-duty piston seal made of an elastomer ring, a PTFE ring and two thermoplastic backup rings, for heavy-duty cylinders. For many years it has been a preferred design in mobile hydraulic equipment and construction machinery for low friction, extrusion resistance and long service life. With K19L and K19X added to the standard K19, the series comprises three material combinations. Standard K19 is rated −30 °C / +105 °C and 400 bar, using NB8001 standard NBR, PT6003 high-performance bronze-filled PTFE and a PM9901 standard POM backup ring. K19L is rated −40 °C / +120 °C and 600 bar; K19X is rated −40 °C / +150 °C and 600 bar. It is used on excavators, front loaders, hydraulic cranes, platform lifts and other mobile equipment.
K518X High-Performance Compact Piston Seal
K518X is a high-performance compact piston seal made of one NBR main sealing ring, TPE backup rings and glass-fibre-filled polyamide bearings. In mobile hydraulic applications with varying pressure ranges and pressure peaks, the specially formed backup rings increase extrusion resistance, and the glass-fibre PA bearings carry axial loads. The NBR main ring is designed for wear resistance without giving up static and dynamic sealing performance. The split TPE backup rings protect the NBR ring against extrusion in high-pressure and high-frequency applications. The glass-fibre polyamide bearing rings provide 45% higher resistance to axial loads than comparable compact seals, while keeping bearing capacity and dimensional stability at high temperatures. It is used in mobile hydraulic applications where high pressure, high temperature and long stroke occur together.
KO O-ring
The KO O-ring is a sealing element that can be used statically or dynamically in many applications. It can be produced from many elastomers, thermoplastics and PTFE, in different Shore hardnesses, and PTFE-coated O-rings can be made with special production techniques. The product page lists easy assembly, a wide size range, a simple groove design and use at higher pressure with a backup ring. The stated application area is hydraulic and pneumatic systems. For NBR grade NB7001 the page gives limits of 63 bar maximum, −30/+105 °C and 0.5 m/s sliding speed. At high pressure and temperature the O-rings are recommended with a backup ring, which protects the system from sudden pressure spikes.
Services
R&D, Material Development and Testing
Kastaş R&D work focuses on developing sealing technologies. The strategic plan targets adding at least one original product to standard product families each year; in addition, nearly 500 new designs a year are made for customer needs, and special, scheduled product groups are developed. Product and mold design is done with 3D design software, prototypes are built, and new designs are checked with finite-element analysis before physical testing. Moldex3D and Digimat are used to simulate material and fibre flow inside the injection mold. The Test Center, established in 2006, runs hydraulic and pneumatic piston and rod tests, wiper and bearing tests, and high-pressure, low-temperature and high-temperature tests. Elastomer materials are developed in-house; polymer materials are developed through international cooperation and certified in the laboratory and by international test bodies.
SmartSeal CNC Rapid Sealing
SmartSeal rapid sealing solutions, within Kastaş, focus on CNC-machined sealing elements and high-performance tube and rod semi-finished products, especially in PTFE and polyurethane. Using advanced CNC machining and high-grade raw materials, production covers a range from urgent repair and maintenance needs to customer-specific sealing designs. On the materials side, high-performance polymer semi-finished products are made from PTFE, polyurethane and composites, all from European-origin raw materials. On modern machines, more than 100 standard designs and special sealing elements are machined from different raw materials.
Application Engineering
With more than 40 years in fluid-power sealing, Kastaş offers sealing solutions for applications in different sectors through the application-engineering team in its R&D organisation. For a system at the new-design stage or an application that needs a technical improvement, requirements are taken with performance expectations and operating details. Standard or custom sealing elements are handled inside the project cycle; finite-element analysis and life tests are carried out, and media resistance and counterface requirements are reviewed when needed. Product design, material development, sample supply, testing, simulation and industrialisation are run within the same project. In hydraulic and pneumatic systems, customer-specific configurations are built for the main seal together with bearings, wipers and static seals.