Hydraulic Adapters

Conformance
Materials
Working Pressures
Torque Values
Caution

Conformance
  • SAE J514
  • 30-Degree Chamfers - Most NPSM pipe swivel union fittings have 30-degree chamfers on NPTF male end of fittings. This chamfer is optional per SAE J514. If chamfer is mandatory, consult with our customer service department to verify chamfer exists on items you are requesting.
  • Temperature Range: -65°F to +400°F

Materials
  • Steel - Carbon steel Zinc plated with yellow Dichromate per ASTM B633-98 (Type II SC-2).

Working Pressures

The following table lists the recommended working pressures for steel NPSM pipe swivel union hydraulic fittings made in accordance with SAE standard J514. Many factors such as impulsing, vibration, mechanical shock and overtightening may affect the integrity of the fitting and swivel union connection. For these reasons, the recommended working pressures are actually lower than the capacity of the fittings. SAE recommends sufficient testing to be conducted to assure that performance levels will be safe and satisfactory, especially if installed in systems operating at elevated pressures or in severe conditions. When using fittings with different size or thread type, use the lower pressure rating of the two threads.

SAE J514 NPSM Pressure Ratings

Dash Size
NPSM Thread Size
4 TO 1 Minimum Burst PSI
-2
1/8-27
5000
-4
1/4-18
5000
-6
3/8-18
4000
-8
1/2-14
3500
-12
3/4-14
2250
-16
1-11 1/2
2000
-20
1 1/4-11 1/2
1625
-24
1 1/2-11 1/2
1250
-32
2-11 1/2
1125


Torque Values:

The torque values provide benchmarks that we believe give optimum results for leak free connections. Actual torque values should be based on individual applications.


Caution

NPSM pipe swivel unions are not designed to provide structural support for other components