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#MAKE SLEEVES WITH TAPPERED LIMBS RUBBER HOSE 2 ISO#
The most popular Boss Seal fitting type is O-ring Boss, however this can be easily confused with Metric ISO 6141 which utilizes Metric threads and a Boss Seal.Don't downvote a relevant submission you simply don't like kindly explain in a comment how it could be improved - anonymous downvotes don't help anybody.
The most popular Face Seal fitting type is O-ring Face Seal, however this can be easily confused with HIAB or GB Face Seal fittings which also utilize Face Sealing. Boss Seal female fittings on the other hand have a grooved “boss” before the first thread that acts to encapsulate the O-ring on the male thread thereby creating a seal. The corresponding female Face Seal fitting has a flat sealing surface that engages the O-ring in the male fitting and compresses it as the fittings are threaded together and creates a seal. The difference is that Face Seal fittings have the O-ring located in the grooved area at the end of the male thread, while Boss Seal fittings have the O-ring located at the base of the male thread. Flared Seatīoth Face Sealing and Boss Sealing fitting types utilize an encapsulated O-ring in order to create a seal.
These sealing systems all share a common trait in that there is a metal-to-metal seal created where the male and female surfaces contact (not including the threads). Chamfers can also be referred to as Inverted Flared Seats and vice versa.īall seats however refer to the spherical sealing surface inside a female thread (swivel only) that seals with the chamfer on the inside of a male thread. Please note the language is interchangeable i.e. Chamfer is a term assigned to the internally bevelled sealing surface inside of a male thread, which mates with a female cone seat and is typically angled at 30°/60°. Flared seats refer to the protruding “nose cone” on a male thread, but also the corresponding inverted flare in a female thread. The ability to properly identify seats, chamfers, and their corresponding angles can also be a benefit to overall fitting identification. M-Metric Taper X F-Metric (port/fixed female only) A thread sealant is applied prior to installation to reduce instances of leakage on tapered threads. With a tapered thread, the fitting typically seals via metal-to-metal wedging of the threads. For a parallel thread in port application, the fitting will usually seal at the top of the thread by means of an O-ring or seal. This first step will help you eliminate a number of possible thread types, as well as possibly reveal the method of sealing. It is important to note that BSPT (British Standard Pipe – Tapered) can seal into a parallel BSP port, and Metric Tapered threads are capable of sealing into a parallel Metric port. A seal must be used for all parallel fittings in port application, with the exception of Cutting Face fittings, however these are fairly rare. Parallel means the thread walls are straight while tapered means the thread walls, if continued lengthwise, would eventually meet. If dealing with a port fitting, the first step towards thread identification is to determine whether the thread is parallel or tapered.
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