Quick Release Couplings

Quick release couplings are fitting are used to mate fluid lines with system equipment that requires frequent connecting and disconnecting. They are used in both pneumatic and hydraulic applications to build or discontinue the connection of a fluid pipeline.

It is well known as quick coupler, quick coupling or quick connect coupling. Quick coupling can be made of stainless steel SS316, carbon steel and brass material for practically every application contingency. The fittings size is available from 1/4” to 2”. The working pressure will be determined depending on the body size.

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

CATALOGUE :

Inteva Quick Release Couplings

Stauff Quick Release Couplings

What are quick release couplings

1. What is quick release coupling?

Quick Release Coupling

The fitting design is simple and easy to install, example a male end inserts into a female end to make a secure and leak-tight sealing. They are being called as push-in connect because the connection requires a quick push only. The fitting is manufactured according to different standard including ISO 7241-A, ISO 7241-B, Gromelle 6000, Hansen W6000, Parker 60, which are subjected to different industry applications.

2. What size is a quick connect fitting?

The smaller the pipe size (OD), the higher pressure the fitting can withstand and it works respectively for different pipe size (OD). The fitting safety factor is 4.

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

Table 1: Working Pressure According to Different Size and Standard

3. How do you identify a hydraulic quick coupling?

There are a wide variety of body and seal materials available to maximize the compatibility in various of application.

Quick Coupling Standard	ISO 7241-A Norm	ISO 7241-B Norm	203 Series TGW
Working Pressure	Up to 350 Bars	Up to 400 Bars	Up to 950 Bars
Connection Type	Push-in type	Push-in type	Threaded type
Material Type	Stainless steel, AISI 316 Carbon steel, EN-10277-3 Brass, DIN-EN 12164	Stainless steel, AISI 316 Carbon steel, EN-10277-3 Brass, DIN-EN 12164	Stainless steel, AISI 316 Carbon steel, EN-10277-3 Brass, DIN-EN 12164
Working temperature	NBR (-30°c to 100°c) Viton (-10°c to 200°c) EPDM (-40°c to 150°c)	NBR (-30°c to 100°c) Viton (-10°c to 200°c) EPDM (-40°c to 150°c)	NBR (-30°c to 100°c) Viton (-10°c to 200°c) EPDM (-40°c to 150°c)
Equivalent Design	Faster ANV Aeroquip FD56 Parker 6600 Snap-Tite 61	Faster H Aeroquip FD45 Parker 60 Snap-Tite 72	Gromelle 6000 Tuthill 6000 Hansen W6000

Table 2: Different Quick Coupling Standard with its Main Features

4. How does a quick connect fitting work?

ISO 7241-A standard is versatile for use in hydraulic application for equipment maintenance or operation system. The fitting design is either a poppet valve or ball closing system. The poppet valve and a metal perch are used to maintain valve alignment and prevent flow duplication. Coupler sleeve and nipple body are hardened to be damage resistant and the standard end configurations include female pipe and straight thread of NPT or BSPP.

ISO 7241-A Quick Connect Fitting

ISO 7241-B Quick Connect Fitting

ISO 7241-B or Parker 60 standard are poppet valves along with a metal to metal valve stop maintains valve alignment. It used to prevent flow duplication. The standard end configuration is female pipe thread of NPT or BSPP. It is generally for applications with lower life cycle and no severe cyclic pressure fluctuations, essentially applied in steady pressure during an operating cycle. The common applications include mine roof support system, hydraulic jacks and high pressure fluid transfer.

Screw end Gromelle W6000 or 203 Series TGW quick coupling is used to connect pipes under high pressure inline systems and high impulse hydraulic applications where fluid lines require fast and easy connection. Screw locking mechanism such as the 203 Series TGW provides exceptional resistance to severe hydraulic loads. This quick coupling is designed for severe conditions where hydraulic shocks, system vibrations or hose bending are possible.

203 Series TGW Quick Connect Fitting

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

Table 3: Application in Different Industry -ring material

5. How do you use quick connect fittings?

Protective dust plug and cap are an important and crucial part to maintain the usage lie of quick couplings. It would be used to cover the connecting surfaces when the nipple and coupler are disconnected. There are many benefits when it comes to applying dust plug and cap in system.

Helps to keep contaminants out of fluid system.
Protection from environmental dirt and grit which prolongs the coupling life and helps to keep maintain the fitting in excellent working condition.
Colour coded plug and cap help to visually identify connecting lines.
Tether straps keep the plug and cap nearby when coupling halves are connected.

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