Hydraulic quick couplings

  • Hydraulic quick couplings
budowa szybkozłącza hydraulicznego
Socket:
1 – body
2 – blocking mechanism (sleeve, spring, steel balls)
3 – seal (O-ring, stopper ring)
4 – valve (valve head, spring, valve holder)
5 – – valve seal (O-ring)
Plug:
6 – body
7 – valve (valve head, spring, valve holder)
8 – valve seal (O-ring)
straight-throughsingle shut-offdouble shut-offdouble shut-off,
dry-break (leak-free)
szybkozłącze hydrauliczne ze swobodnym przelotem
szybkozłączka hydrauliczna ze stali nierdzewnej
hydrauliczne szybkozłąćze
szybkozłączka hydrauliczna ze stali węglowej
no valvesvalve only on supply side
(most often in socket)
valves on both socket
and plug side
valves on both socket and plug side,
(flat surface face – “flat face”
and appropriate sealing
szybkozłącze hydrauliczne jednostronnie odcinające
szybkozłącze hydrauliczne dwustronnie odcinające
szybkozłącze hydrauliczne
szybkozłącze hydrauliczne dwustronnie odcinająceszybkozłączka hydrauliczna

Quick release couplings are manufactured according to generally acknowledged standards or according to the manufacturer’s standards. The most common in hydraulics:

  • ISO 7241-1 A (ISO-A)
  • ISO 7241-1 B (ISO-B)
  • ISO 16028 (ISO-F)

Standards define the dimensional requirements for sockets and plugs, strength requirements (working pressure, bursting pressure) and others (flow rate, connection strength, spillage volume, etc.). Dimensional requirements deal with a plug profile in particular (shape and dimensions). Manufacturing according to the same profile standard ensures so called “interchangeability” and allows connection of sockets and plugs from different producers. However, this connection does not guarantee all functional features of an original set of couplers (socket and plug
from the same manufacturer) and should be properly verified.

Pressure eliminator

The application of a socket or a plug with a pressure eliminator facilities connection of quick release couplings when residual pressure in the system is high. The eliminator, a tiny release valve with two small holes, is built into the socket or plug. Once the quick release coupling is connected, release valve opens, the medium flows out through the holes causing the drop of the static pressure.

socket and plug without eliminatorvalve without eliminator
szybkozłącza rolnicze
szybkozłącze hydrauliczne wysokie ciśnienia
socket and plug with eliminatorvalve with eliminator
szybkozłącze wtykowe hydrauliczne
szybkozłącze wysokoćisnieniowe

ISO-F quick release couplings can be fitted with a pressure eliminator at the plug side only. In ISO-F plug with the pressure eliminator, there is an additional space inside the body, into which pressurised oil enters when connecting to the socket. As a result, static pressure drops (in the hose assembly on the plug side) and the quick coupling can be easily connected.

socket without eliminatorplug without eliminator
szybkozłączka ISO A
szybkozłącze ISO-F
plug with eliminator
szybkozłączka hydrauliczna ISO-F

Protection against accidental disconnection

Disconnection of standard quick release couplings requires backward pull of the plug-locking sleeve in the socket. To prevent accidental disconnection, some of the quick release couplings are equipped with locking sleeve security mechanism preventing backward pull and accidental disconnection. This feature is implemented by an additional safety locking ring (which needs to be moved in the direction of sleeve and turned) or security pin (safety lock- turning of the sleeve is only possible in a proper position of a cut in the sleeve).

safety locking ringlocking pin
szybkozłączka niezabezpieczona

quick release coupling unlocked

szybkozłączka hydrauliczna skręcana

quick release coupling unlocked

szybkozłączka z pierścieniem zacinającym

quick release coupling locked

szybkozłączki hydrauliczne

quick release coupling locked

„Push-pull” system

The application of “push-pull” quick release couplings protects flexible hose assemblies from tearing apart in case of accidental strain (e.g. a tractor drives away from a seeder – a mechanical coupler has already been unhooked but hydraulic installation is still connected). The “push-pull” system works properly only if the socket is fixed to the body of equipment (housing) with a knurled locking sleeve (see picture below). When the hose assembly is strained, automatic disconnection of the quick release coupling follows. This prevents damage of the hydraulic installation and possible oil loss. There is also a type of quick release couplings with emergency breakaway function.

szybkozłącze hydrauliczne z mechanizmem push pull

„One hand operation” – connection and disconnection with one hand

To connect standard quick release coupling, locking sleeve must be pulled back and the plug must be pushed into the socket. In order to increase the ease of handling, some of the quick release couplings are connected (disconnected) with one hand. The connection takes place automatically after only pushing the plug into the socket. In order to disconnect such a coupling, the locking sleeve must be pulled back and the plug will pop out.

One hand operationStandard
szybkozłączka hydrauliczna połączenie jedną ręką
wysokie ciśnienia szybkozłącza hydrauliczne

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Type of material:

Hydraulic quick release couplings in carbon steel

Hydraulic quick release couplings in carbon steel

Hydraulic quick release couplings in stainless steel

Hydraulic quick release couplings in stainless steel

Hydraulic quick release couplings in brass

Hydraulic quick release couplings in brass

List of products:

Agricultural quick release couplings

DIN agricultural quick release couplings

quick release couplings

ISO-A quick release couplings (DNP, HOLMBURY, DRAGON)

 iso-b quick release couplings

ISO-B quick release couplings (DRAGON, HANSEN, TEMA, PERFECTING)

quick release couplings iso-f

ISO-F hydraulic quick release couplings; spill-free  (DNP, CEJN, HOLMBURY, PH)

 hydraulic multi-couplings

Hydraulic multi-couplings (CEJN, PISTER)

NORDIC RANGE quick release couplings

NORDIC RANGE quick release couplings (CEJN, TEMA)

NORDIC INTERCHANGE quick release couplings

NORDIC INTERCHANGE quick release couplings (DNP, HOLMBURY)

gromelle quick release couplings

GROMELLE quick release couplings; H-5000 plug-in, W-6000 screw-to-connect

Hydraulic screw-to-connect quick release couplings

ISO 14541 hydraulic screw-to-connect quick release couplings (DNP, HOLMBURY)

Hydraulic wing nut screw-to-connect quick release couplings in carbon steel and in brass

Hydraulic wing nut screw-to-connect quick release couplings in carbon steel and in brass

NITTO KOHKI hydraulic quick release couplings; in special alloy steel with excellent durability

NITTO KOHKI hydraulic quick release couplings; in special alloy steel with excellent durability

Szybkozłącza SNAP-TITE

SNAP-TITE Hydraulic quick release couplings; H wg MIL-C 51234 series ,71 serie – „flat-face” type

Hydraulic quick release couplings blank caps

Hydraulic quick release couplings blank caps

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