10.2 Quick Couplings
QR74 HP Quick Release Coupling QR74 Series Coupling is of a rugged design and has been developed for a broad variety of heavyduty applications. Primary usage of the coupling is in Blow Out Preventer Control Lines. See also: Fireshield 3000 BOP Hose Chapter 7 page 59 FEATURES
• Fire rated by Lloyds Register of Shipping to 700°C • Valves are designed to shut off automatically in both the male and female halves when the unit is disconnected
• Connection and disconnection take seconds. To connect, thread the nipple onto the coupler – to disconnect unthread
• Completely serviceable – all components can be replaced
• Available in various materials • Manufactured to customers own specifications if required, eg bulkhead applications
• Wing or hex nut styles available - wing nut for ease of connection, hex nut for confined spaces
• Dust plugs and caps are available to suit the QR74 coupling
• Coloured visual aid located on male half of the coupling to ensure 100% connection of coupling is made
• Proven track record Mating Coupling
Coupling NPT FEMALE Size A 3/8 3.334 1/2 4.330 3/4 5.000 1 6.000 1.1/4 6.614 1.1/2 7.440 2 9.054
Female Couling
B 2.332 2.790 3.111 3.629 3.955 4.347 5.175
C 2.983 3.386 3.898 4.694 5.275 5.064 7.768
D 3.000 4.250 4.750 4.750 5.750 5.500 7.250
Male Coupling
Coupling Size
Female Coupling Part No.
Male Coupling Part No.
Max. Oper. Pressure ST ST 316 psi bar
Min Burst Pressure ST ST 316 psi bar
Max. Oper. Pressure Carbon Steel psi bar
Min. Burst Pressure Carbon steel psi bar
3/8 1/2 3/4 1 1.1/4 1.1/2 2
QR74AFBC5-06 QR74AFBC5-08 QR74AFBC5-12 QR74AFBC5-16 QR74AFBC5-20 QR74AFBC5-24 QR74AFBC5-32
QR74AMBC5-06 QR74AMBC5-08 QR74AMBC5-12 QR74AMBC5-16 QR74AMBC5-20 QR74AMBC5-24 QR74AMBC5-32
8000 7500 6000 6000 5000 3000 3000
26000 24000 19500 18000 15000 14000 13500
8800 8000 7000 7000 6000 6000 6000
29000 27000 22500 21000 18500 18000 16500
530 500 400 400 330 207 207
1730 1600 1300 1200 1000 930 900
585 530 465 465 400 400 400
Mento Hoses and Couplings Catalogue
1930 1800 1500 1400 1230 1200 1100
91