NPT (National Pipe Taper)
It is the most common U.S. standard for pipe fittings. NPT fittings are measured on the internal diameter of the fitting. NPT ports and
fittings are both tapered. When threaded together, the NPT design creates a wedging effect, binding the thread in order to seal. The
use of a thread sealant is common and required with NPT, as it does not consistently create a positive seal on its own, like an O-Ring
configuration.
BSP ( British Standard Pipe)
This is the U.K. standard for pipe fittings. Also called BSPT - British Standard Pipe Taper threads or BSPP - British Standard Pipe
Parallel.
Parallel (Straight) threads. BSPP requires a sealing ring and the BSPT achieves pressure tight joints by the threads alone.
SAE (Society of Automotive Engineers)
A version of the Unified Thread Standard developed by the US and originally adopted by the US automotive industry. SAE are
parallel threads with “O” ring seals.
Delrin AF (Valve seat material)
Delrin AF is a unique thermoplastic material which is ideally suited as a valve seat where low friction and long wear life are important.
Suitable for sustained temperatures up to 120 degree’s centigrade.
PEEK (Valve seat material)
PEEK is a high performance thermoplastic material offering chemical and water resistance. Suitable for sustained temperatures up to
250 degree’s centigrade. FDA approved for food contact applications.
Viton (O Ring Material)
Viton is a brand of synthetic rubber and fluoropolymer elastomer commonly used in O rings. Viton offers excellent resistance to aggressive
fuels and chemicals and has worldwide ISO 9000 and ISO/TS 16949 registration. Suitable for temperatures up to 200 degrees
centigrade.
Nitrile N90 (O Ring Material)
This is an organic compound suitable for use as an “O” ring. N90 stipulates the hardness of the compound. Suitable for temperatures
up to 120 degrees centigrade.