The flat-sealing Hy-Lok ZCO screw fittings have no clearance in axial direction during installation and removal (Zero Clearance). They have an O-ring face seal and are designed for vacuum up to high-pressure applications at high temperatures up to 280°C (550°F).
They are easy to install and maintain, and offer bores for leak tests.
|Body, sleeve, nuts:||Stainless steel 316|
|Butt welding fittings:||Stainless steel 316L|
|O-ring (standard):||Viton, hardness 70 Viton, |
Hardness 90 (SAE/MS thread)
|Buna N (BU)||250 °F (120 °C)|
|PTFE (PE)||450 °F (230 °C)|
|Perfluoroelastomer (KA)||550°F (280°C)|
|Ethylene propylene (EP)||300 °F (140 °C)|
ZCO assemblies are subjected to a 100% leak test with helium at a flow rate of 4 x 10-9 standard cubic metres/s and are absolutely leak-free.
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