Quick Release Couplings

QUICK RELEASE COUPLINGS

Quick release couplings are also known as quick coupler, quick connect coupling, or quick release fitting. They are made following the ISO 7241-A, Gromelle 6000, ISO 7241-B, Parker 60, and Faster depending on the industry and application intended. Quick release couplings are made in various sizes ranging from 1/4” to 2”.

The working pressure of the couplings is determined by the size used, however, it can withstand a maximum of 950 bars. They are made of brass, carbon steel A105, or stainless steel SS316. Quick release couplings have two parts – male (plug or nipple) and female (socket or coupling). It uses the connection types National Pipe Thread (NPT) or British Standard Pipe Parallel (BSPP). Quick release couplings are used to create or dismantle the connection of fluid lines.

Material Specification	Brass Carbon Steel A105 Stainless Steel SS316
Connection Type	Threaded BSPP Threaded NPT
Size	1/4” to 2”
Working Pressure	Up to 950 Bars

1. What are Quick Release Couplings?

HYDR Quick Coupling Female ISO A

Quick Couplings are a fitting type used to join fluid lines with system components that often need connection and disconnection. They are suitable for use in a hydraulic or pneumatic system to create or dismantle fluid lines' connection.

The fittings are designed in a way to ensure easy installation. For instance, the male end is inserted into the female end to ensure the components are tightly fitted and sealed together. According to the industries and systems application, the couplings are designed following various standards such as Gromelle 6000, Parker 60, Hansen W6000, ISO 7241-B, ISO 7241-A. More so, quick release couplings are referred to as push-in connects because connection only occurs through a quick push.

2. How does Quick Release Coupling work?

Quick release couplings are made of Brass (DIN-EN 12164), Carbon Steel (EN-10277-3), and Stainless Steel SS316 (AISI 316). The working pressure for quick release couplings is a maximum of 950 bars, however, there’s a different rating for each standard. For instance, the ISO 7241-A has a maximum of 350 bars working pressure, ISO 7241-B has a working pressure of 400 bars, while the Gromelle 6000 works with a maximum pressure rating of 950 bars.

The connection types available for quick release couplings are threaded BSPP and threaded NPT. The couplings are divided into two parts, male and female. The male is also known as the plug while the female part is the socket. For different standards, there are different connection processes. For Gromelle W6000, the connection type is a screw-to-connect. For others, ISO 7241-A, ISO 7241-B, and Hansen W6000, the connection is a push-to-connect type (male and female).

Quick release coupling is produced in different sizes ranging from 1/4” to 2”. However, a known fact explains that the smaller the sizes, the greater the working pressure it withstands and vice versa. For maximum safety, the factor to be used is 4.

Please refer to the table on the right for the sizes and working pressure:

Gromelle 6000 Dust Cap

Size	Working Pressure (Bar) 203 Series TGW	Working Pressure (Bar) ISO 7241-A Norm	Working Pressure (Bar) ISO 7241-B Norm
1/4”	950	350	400
3/8”	750	300	380
1/2”	750	300	350
3/4”	650	250	320
1”	450	230	300
1 1/4”	450	230	280
1 1/2”	300	200	140
2”	300	130	100

BAHASA INDONESIA

3. How do you identify a hydraulic Quick Release Coupling?

There’s a wide availability of body and seal materials, which has increased the quick couplings' flexibility and versatility.

The table below shows the features of the different standards available:

Quick Release Coupling Standard	203 Series TGW	ISO 7241-A Norm	ISO 7241-B Norm
Connection Type	Threaded Type	Push-in type	Push-in type
Working Pressure	Up to 950 Bars	Up to 350 Bars	Up to 400 Bars
Material Type	Stainless steel, AISI 316 Brass, DIN-EN 12164 Carbon steel, EN-102773	Brass, DIN-EN 12164 Carbon steel, EN-102773 Stainless steel, AISI 316	Brass, DIN-EN 12164 Carbon steel, EN-102773 Stainless steel, AISI 316
Working Temperature	NBR (-30 ⁰c – 100 ⁰c) EPDM (-40 ⁰c – 150 ⁰c) Viton (-10 ⁰c – 200 ⁰c)	NBR (-30 ⁰c – 100 ⁰c) EPDM (-40 ⁰c – 150 ⁰c) Viton (-10 ⁰c – 200 ⁰c	NBR (-30 ⁰c – 100 ⁰c) EPDM (-40 ⁰c – 150 ⁰c) Viton (-10 ⁰c – 200 ⁰c
Equivalent Design	Gromelle 6000 Hansen W6000 Tuthill 6000	Parker 6600 Snap-Tite 61 Faster ANV Aeroquip FD 56	Faster H Aeroquip FD45 Snap-Tite 61 Parker 60

4. How do you install a Quick Release Coupling?

A quick coupling comprises the body, a collet, and an O-ring. The body of the coupling screens the O-ring and collet. The tube is then placed into the body through the collet and O-ring. The joining of these components gives the system a water-tight seal. When the system begins to run, there is an increase in the tube's pressure, which turns to water or air.

For the ISO 7241-A, the system is flexible for use in maintenance or operation systems. The coupling is designed in a ball closing system or poppet valve shape. The poppet valve is attached to a metal perch which helps keep the valve alignment in line with the settings and avoid flow duplication. The coupler sleeve and nipple body are stiffened to increase the resistance to different damages that could occur during system operation. The configuration type used for quick release coupling is NPT or BSPP.

Quick Coupling 203

Parker 60 or ISO 7241-B are designed as poppet valves and a metal to metal valve stop, which helps keep valve alignment configured and avoid flow duplication. It is used for lower life cycle systems such as high pressure fluid transfer, mine roof support system, and hydraulic jacks. The connection type is a female pipe thread in NPT or BSPP.

203 Series TGW or Screw end Gromelle W6000 are applied for high pressure pipes, systems, and hydraulic applications. They ensure the smooth and quick running of fluid. The 203 Series TGW has a screw locking device that increases the resistance to heavy hydraulic loads. They can withstand harsh situations such as system vibrations, hose bending, or hydraulic shocks.

The table below shows more about the applications of the quick release coupling fitting:

Quick Release Coupling Standard	203 Series TGW	ISO 7241-A Norm	ISO 7241-B Norm
Applications	Industrial Construction Material Handling Oil and Gas System subject to mechanical loads, high pressures	Industrial Snow plough Mobile applications Truck trailer connection Agricultural	Offshore Cleaning equipment Industrial hydraulics Steam systems Water and coolant lines Mobile applications Foods and chemical processing

5. How do you release a Quick Release Coupling Fitting?

Quick Release Coupling ISO 7241-B Male

Adapter fittings are connectors that can provide an instant solution for easy transfer of flow from one direction to the other. The renowned brand of adapter fittings available in the market is Parker, United States.

The advantages of using adapter fittings are:

There’s a variety of choices for connections and configurations available for use.
There’s plastic cap protection given for the male thread connections.
Adapter fittings are suitable to be used in high pressure machines.
The threads are designed to provide high reliability and avoid any form of leakage.