AIR HOSE COUPLINGS – This form of energy can be one of the most dangerous because it is used in so
many applications and when mishandled, can have more serious results than fluids. Air, as a gas, is compressible
(fluids press only against hose or vessel walls and lose little volume under pressure). When pressurised air releases
suddenly, it does so with explosive force and can cause rapid hose whip, which can do serious physical harm
to personnel or damage to nearby objects. This is why the selection of proper hose and couplings for air-lines is
so important, along with their proper installation and maintenance. Never take for granted that a coupling is installed
properly or a clamp fully tightened on an air hose – check it regularly and use safety devices
(see King Cable Hose Restraint Section).
Air King universal couplings can be recommended for 10 bar (150psi) working pressure at ambient temperature
(21°C / 70°F). It is recommended that an Air King safety clip or wire restrainer is used to avoid accidental disconnection.
Also a King cable should be standard practice on the supply end of the hose. Boss or Air King interlocking type bolt
clamps should be used and both components of an Air King assembly should be Dixon products standard Air King
fittings are fitted with AWR4 washers. Air King is also available to meet MIL spec. WWC-633D.
4-lug King quick-acting couplings may only be used in conjunction with an Air King Safety Clip.