Holmbury High Pressure Poppet Type Screwed
Couplings are designed to withstand high pressures
and pressure pulses. High pressure pulses create forces
that act to separate the male and female couplings.
With couplings that use ball-in-groove retaining
mechanisms, the separating forces are concentrated
onto a relatively small area - point contact of the balls -
which can cause Brinelling (indentation of the balls into
the groove). Brinelling will lead to leakage and
eventually seizure of the coupling. Screwed couplings
have a screw thread retaining mechanism that
distributes the separating forces over a large surface
area, thus eliminating brinelling.
Screw thread retaining mechanism to
Connection and disconnection can be performed
even with a low residual hydraulic pressure in the line
Mobile plant, agricultural implements and general
Zinc plated carbon steel body material with nitrile seals
and PTFE backing ring.
Working temperature range with nitrile seals is
-20°C to +100°C
Couplings are also available with Viton seals for an
operating temperature range of -15°C to +180°C.