Tiiveillä

Tiiveillä is a Finnish term commonly used in mechanical engineering and manufacturing to refer to seals or gaskets and the use of sealing elements in a system. The primary purpose of tiiveillä is to prevent leakage of liquids or gases, maintain pressure, and separate different media. Sealing can be static, where mating surfaces are joined without movement, or dynamic, where one surface moves against another.

Types and materials commonly associated with tiiveillä include flat gaskets and flange seals for static applications, as well as O-rings, lip seals, and mechanical seals for dynamic applications. Materials range from elastomers such as NBR, EPDM, silicone, and fluorocarbon to non-elastomeric options like PTFE and graphite. The choice of material depends on factors such as chemical compatibility, temperature range, pressure, and the nature of the fluids involved.

Design considerations for tiiveillä cover several factors. Material selection must match chemical and thermal exposure, and sealing surfaces must have appropriate finish and flatness. The correct level of compression is essential to achieve a reliable seal without damaging components. Proper lubrication, installation torque, and clean mating surfaces are important to avoid extrusion, embedding, or nicking of sealing elements. Contaminants, vibration, and long-term wear also influence seal life and performance.

Installation and maintenance practices are key for reliable sealing. After assembly, seals should be tested for leaks using appropriate methods such as pressure decay or leak testing. Regular inspection for signs of wear, cracking, deformation, or chemical attack is recommended, with timely replacement to prevent leaks or equipment damage. Tiiveillä practices are governed by various international standards and specifications that address dimensions, materials, and performance requirements across industries.