Fluid Rotary Union
Model 70
Multi Pass Fluid Rotary Union
The Model 70 is a multi pass fluid rotary union with over 30 years service as the diving industry standard fluid joint. It is available as a stand alone FRU or combined with electric slip ring and fiber optic rotary unions. Typically configured with up to 12 passes, inter-port mixing is prevented through the use of double seals and an intermediate vent between passes. It has also proven itself in non diving applications such as centrifuge, indexing tables, and floating oil production swivels where product quality is paramount.
The Model 70 is available in several standard port configurations or types as illustrated below. The Model 70 is available with the standard seal technology or with a new low leakage seal option. In its standard configuration, it is rated for 1000 psi [68 bar] at 10 rpm continuous service and up to 30 rpm intermittent service.
Features
- Configurable with up to 12 ports as standard
- 1/4”, 1/2”, 5/8”, 1” SAE straight thread o-ring ports standard
- Corrosion resistant materials suitable for hot sea water and other harsh chemicals
- Rated to 1000 psi [68 bar] at 10 rpm continuous service
- Maximum speed 30 rpm intermittent
- Polymer bearings eliminate the need for periodic service
- Optional rolling element bearing design available
- Available with hollow bore for ESR / FORJ pigtails
Benefits
- Continuous 360º rotation
- Proven reliability
- Maintenance free service
- Configurable
Specifications
-
Ambient Temperature
Gases
Liquids-40° to 60° C
-40° to 100° C
0° to 60° C -
Pressure
1000 psi
-
Rotational Speed
10 rpm continuous
30 rpm intermitent -
Torque
Approx 80lb-ft [110 N-m]
-
Shock/Vibration
Mil-Std-167 (ships)
-
Weight
Dependent on configuration
-
Environmental
Marine, open deck
-
Leakage Std. Seal
167 std. mL / min N2 gas per seal rotating @ 1000 psi max
Typically less than 30 std. mL / min N2 gas per seal rotating @ 1000 psi -
Low Leak Seal
2 std. mL / min N2 gas per seal rotating @ 1000 psi max
Typically less than 0.05 std. mL / min N2 gas per seal rotating @ 1000 psi -
Nominal Port Size
1/4 inch
1/2 inch
5/8 inch
1 inchSAE straight thread O-ring thread size
7/16-20 UNF
3/4-16 UNF
7/8-14 UNF (passage size suitable for 3/4" nominal, 1-1/16-12 UN adapter)
1-5/16-12 UN
Please note that operational life of the unit is dependent upon rotational speed, environment and temperature. Flexible conduit should be used to couple to the rotating component. The torque arm must be loose coupled.
Model 70 Technical Data Sheet
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