Vacuum Fittings
Product category
Choosing the correct vacuum fittings and vacuum flange is not an easy task in Singapore.
Here at Rooks Vac, we offer the below.
- 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.
NW flange (ISO-KF) assembly
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.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
ISO vacuum flange assembly
ISO fittings provide high corrosion resistance in semiconductor processing and excellent repeatability across the range of low to high vacuum applications. The flanges are joined using either claw clamps or bolts with a fluroelastomer or nitrile centring ring and O-ring.
- Manufactured to ISO 1609 and DIN 28404 standards
- Nominal diameters 40-630 mm
- ISO-F flanges have fixed hole patterns
- ISO-K flanges are typically joined with claw and can be converted/connected to ISO-F using a rotatable collar or half claws
- High-vacuum applications: pressure >10-8 mbar
Double claw clamps slot into a circular grove around the flange and secured to provide a simple but secure flange connection. The more conventional method is to use a range of bolt holes and nut/bolts with either a rotatable or fixed collar flange.
UHV ConFlat® flange assembly
CF fittings have a unique sealing system to achieve a leak tight joint. A copper seal is squeezed axially and radially between two CF flanges, where knife-edges force the copper to cold flow. This flow is severely limited by the vertical flange wall which generates high pressures and fills surface imperfections to prove an extremely tight metal to metal seal.
- Manufactured to ISO 3669 standard
- Nominal diameters 16-350 mm
- Used with copper ring metal seals
- Bakeable up to 450 ºC
- Typically used in UHV systems: pressures <10-8 mbar
Metric flanges, common in Europe and Asia, use metric tapped holes and bored holes in flanges suitable for metric tubing. Flanges specified in inches, more commonly used in the USA, use UNF flange threads and bored holes compatible with inch size tube. We offer both options.
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