Page 188 - RYCO Product Technical Manual 2019 V2-3
P. 188

 COUPLINGS
INFORMATION
 WORKING PRESSURE OF HOSE ASSEMBLIES
Working Pressure of each Hose Coupling End Style Termination is shown in the Technical section. In most cases, the Working Pressure of the Hose Coupling End Style Termination that can be chosen for a particular hose exceeds the Maximum Working Pressure of the Hose. It is possible however, to select a Hose Coupling with an End Style having a lower Working Pressure than the Hose. In this case, as noted in SAE J516 and SAE J517, the rated Working Pressure of the Hose Assembly must not exceed the lower of the respective Working Pressure rated values.
EXAMPLE 1.
T28D Hose Assembly with T2040-0812 coupling one end and T2090-0808 coupling other end.
From page 101 Maximum Working Pressure of T28D is 350 bar.
From page 201 and the technical section pages 494 to 498 the Maximum Working Pressure of T2040-0812 is 690 bar. From page 197 and the technical section pages 494 to 498 the Maximum Working Pressure of T2090-0808 is 690 bar.
The Maximum Working Pressure of the Hose Assembly is therefore 350 bar, the lowest of the respective Maximum Working Pressure rated values (in this case, the hose).
EXAMPLE 2.
H5016D Hose Assembly with T7130-1620 coupling one end and T7030-1621 coupling other end.
From page 78 Maximum Working Pressure of H5016D is 350 bar.
From page 290 and the technical section pages 494 to 498 the Maximum Working Pressure of T7130-1620 is 280 bar. From page 278 and the technical section pages 494 to 498 the Maximum Working Pressure of T7030-1621 is 420 bar.
The Maximum Working Pressure of the Hose Assembly is therefore 280 bar, the lowest of the respective Maximum Working Pressure rated values (in this case, the T7130-1620).
33000 SERIES COUPLINGS FOR SRX AND SRF SERIES HOSE
The Maximum Working Pressure of a SRX or SRF Series Hose Assembly depends on the couplings used, and the method of attachment. See pages 126 and 127
33000 Series Couplings with RSC Clamps are suited to Suction Applications, and Low Pressure Delivery (up to 25% of Maximum Working Pressure of the hose).
T4000 One-Piece Crimp Couplings are suited to Suction Applications, and High Pressure Delivery (up to 100% of Maximum Working Pressure of the hose).
EXAMPLE:
SRF20 Hose Assembly with 33020-2020 Couplings each end secured with RSC-4347 Clamps.
From page 127 Maximum Working Pressure of SRF20 hose is 14 bar.
From page 184 and the technical section pages 494 to 498 the Maximum Working Pressure of 33020-2020 coupling is 215 bar. Maximum Working Pressure of the Hose Assembly is 25% of 14 bar = 3,5 bar.
If this Hose Assembly was made with T4020-2020 One-Piece Crimp Couplings instead:
From page 127 Maximum Working Pressure of SRF20 hose is 14 bar.
From page 234 and the technical section pages 494 to 498 the Maximum Working Pressure of T4020-2020 coupling is 215 bar. Maximum Working Pressure of the Hose Assembly is 100% of 14 bar = 14 bar.
8000 SERIES COUPLINGS FOR PL1 AND RQP6 SERIES HOSE
PL1, PL1D, PL1PV and RQP6 Series hose, and 8000 Series Push-On Fittings, are recommended for use in systems with Static Working Pressures (constant loads without pressure spikes) only. They are not recommended for vibration or pressure surge applications.
PL1, PL1D, PL1PV and RQP6 Series hose should not be used at both maximum working pressure and maximum temperature simultaneously.
8000 Series Push-On pages 324 to 331.
Assembly Instructions page 482.
PL1, PL1D, PL1PV and RQP6 Series hose simply pushes on to 8000 Series Couplings, and for Static Working Pressures up to 50% of Maximum Static Working Pressures a clamp is not required. For diesel fuel and other potentially dangerous or critical applications, and Static Working Pressures above 50% of maximum; a clamp around the hose is required. Do not overtighten clamp as this will damage hose. Factory crimped couplings are also available in some sizes. Contact RYCO for more information.
DROP LENGTH & CUT-OFF ALLOWANCE DIMENSIONS FOR COUPLINGS
In this Product Technical Manual, dimensional values for Drop Length (DL), Cut-off Allowance (CA), Seat to Ferrule (L), Back up Hex (AF), Male Hex (HM) and Female Hex (HF) are published.
Due to different manufacturing methods and design changes, DL, CA, L, AF, HM and HF values may vary from time to time.
Before attaching couplings to the hose, measure and check that the DL, CA and L dimensions of the actual coupling to be used complies with that published, or is suitable for the application.
NOTE: Drop Length (DL), Cut-off Allowance (CA), Seat to Ferrule (L), Back up Hex (AF), Male Hex (HM) and Female Hex (HF) dimensions shown are for reference only, and may vary according to manufacturing method.
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