Screw-type couplings of the HA series are of very rugged design, making them particularly well suited for use in construction equipment under extreme conditions.

The coupling is coupled by simply screwing the carrier and probe halves together until the thread contacts the limit stop.

The coupling is designed to open both valves "en bloc" in this position. This makes the coupling insensitive to hydraulic impacts.

The range of operating pressures of this series is higher than that of the HS series.

The coupling can be coupled or uncoupled under pressure; without tools up to 50 bar and with tools up to 250 bar.