Union, Low-Speed, 1-1/2" NPT RH, 3/4" NPT
1890-279
- Duoflow design for low-speed air and hydraulic applications
- Self-supported rotating union
- Composite bearing
- Vent holes between passages
- Special seals
- Hardened sealing surface
- Aluminum housing and steel rotor
- Triple-passage tandem model available
Dimensions
A
1-1/2"-11.5 NPT RH1-1/2"-11.5 NPT RH
B
3/4"-14 NPT3/4"-14 NPT
C
89 mm3.504 "
D1
225 mm8.858 "
E
67 mm2.638 "
F
30 mm1.181 "
G
35 mm1.378 "
H
64 mm2.52 "
J
104 mm4.094 "
K
3/4"-14 NPT3/4"-14 NPT
P
Non-ThreadedNon-Threaded
R
158 mm6.22 "
S3
ThreadedThreaded
Operating Specifications
Media
Air, Hydraulic Oil, VacuumAir, Hydraulic Oil, Vacuum
Rotor Connection
1-1/2"-11.5 NPT RH 1-1/2"-11.5 NPT RH
Supply Connection
3/4"-14 NPT 3/4"-14 NPT
Air Max. Flow
8497 l/min300 CFM
Air Max. Pressure
10 bar150 psi
Air Max. Temperature
121 °C250 °F
Hydraulic Oil Max. Flow
204 l/min53.9 GPM
Hydraulic Oil Max. Pressure
207 bar3000 psi
Hydraulic Oil Max. Temperature
121 °C250 °F
Vacuum Max. Flow
0.067 l/min0 GPM
Vacuum Max. Pressure
-0.95 bar-13.75 psi
Vacuum Max. Temperature
121 °C250 °F
Documents & Resources
Operating Manual
Operating Manual for Soft-Seal Air & Hydraulic unions
Service Guide
Service Guide for unions beginning with 1790 or 1890