[[TitleIndustry]]

ORFS Hydraulic fittings pressure rating

Date:Jun 10, 2019

ISO 8434-4 ORFS fittings are made of carbon steel shall meet or exceed without leakage the requirements from a vacuum of 6,5 kPa (0,065 bar) absolute pressure to the working pressures given in Table 1 when used at temperatures between −40 °C and +120 °C with petroleum-based hydraulic fluids

ORFS_hydraulic_fittings_pressure_rating_ISO8434-3

Working pressures for SAE J1453 O-ring face seal connectors

Maximum working pressure Tube outside diameter a Connectors with non adjustable stud ends Connectors with adjustable stud ends mm in Thread b MPa (bar) MPa (bar)

6 1/4 M12 × 1,5 63 (630) 40 (400)

8 5/16 M14 × 1,5 63 (630) 40 (400)

10 3/8 M16 × 1,5 63 (630) 40 (400)

12 1/2 M18 × 1,5 63 (630) 40 (400)

16 5/8 M22 × 1,5 40 (400) 40 (400)

20 3/4 M27 × 2 40 (400) 40 (400)

22 7/8 M30 × 2 40 (400) 35 (350)

25 1 M33 × 2 40 (400) 35 (350)

30 1 ¼  M42 × 2 25 (250) 25 (250)

38 1 ½ M48 × 2 25 (250) 20 (200)


NOTE These pressures were established using connectors made of low carbon steel and tested according to Clause 15.

a Metric tubing shall be preferred.

b Port in accordance with ISO 6149-1; stud end in accordance with ISO 6149-2.

c This size will be included in the revisions of ISO 6149-1 and ISO 6149-2.

Previous: SAE J1453 o ring face seal Groove size chart

Next: ISO 8434-3 vs SAE J1453 standard pdf