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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Vertical Divider
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
Quick Release Couplings Catalogue

What are quick release couplings

1. What is quick release coupling?
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
​
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-A Quick Connect Fitting
ISO 7241-B 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
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. 
​
  1. Helps to keep contaminants out of fluid system.
  2. Protection from environmental dirt and grit which prolongs the coupling life and helps to keep maintain the fitting in excellent working condition. 
  3. Colour coded plug and cap help to visually identify connecting lines. 
  4. Tether straps keep the plug and cap nearby when coupling halves are connected.
Quick Release Couplings Catalogue

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