Clamping Ring - St St NW20/25 (red wing nut)

ISO-KF Fastening Elements

When you buy vacuum pump components from Edwards, you can expect the quality and service that only a leading international supplier can provide. We understand that flanges and fittings are critical to the performance of your vacuum system, and supply only high quality products which meet the highest specification.

NW fittings, otherwise known as ISO-KF, are the industry standard for many applications in the low to high vacuum range. They are ideal for achieving dependable cost effective performance down to 10-7 mbar across a range of applications from light to harsh duty. A simple fastening method means that systems can be easily assembled and a leak tight vacuum seal is quickly achieved.

Our components and flange fittings are designed to be leak-tight across the range of vacuum applications, and not intended to provide full structural support. When designing any vacuum system, it is essential that consideration is given to the static and dynamic loads imposed on each connection. If necessary, additional mechanical support should be provided and built into the design. Regular inspection including leak-checking and, where appropriate, periodic replacement of components should be considered to ensure system efficiency and safety is maintained.

Features and Benefits

• Convenience of supply - Single source supplier, able to provide the complete system solution either online or via local supply centres.
• High quality and reliability - Precision material control ensures a dependable vacuum performance on sensitive or demanding applications.
• Comprehensive choice - Complete range for all common flange sizes in aluminium and stainless steel.
• Manufactured to ISO 2861 and DIN 28403 standards
• Nominal diameters 10 to 50 mm
• Use with either elastomer or formed aluminium seals
• Choice of clamp type depending on application, access, convenience and cost
• For use in high-vacuum applications: pressures > 10-8 mbar