Description
Roemheld Two Passage
7250 psi max
Ideal for supplying fluid to rotating or swiveling fixtures. Rotary Couplings are the best option for feeding fluid to rotating pallet changers, due to the continuous fluid connection. A four-passage Rotary Coupling can be mounted at the rotational center of a horizontal machining center to provide pressure and return lines for individual clamping valves. Also ideal for rotary index tables.
Models Available
The version with leakage recirculation has an additional port L for recycling the slight amount of fluid lost due to internal bearing leakage.
Design Considerations
In applications with rotary tables, the fluid pressure in the coupling will increase the table’s starting-torque requirement and affect maximum rotation speed. All fluid-supply passages must be connected the power source, to ensure sufficient lubrication of the seals (do not turn the coupling while dry, even before installation). Use only with clean hydraulic fluid (10 micron or better nominal filtration). Use either standard hydraulic fluid or other hydraulic fluid of the viscosity classes HLP 22, 32, or 46. Allowable operating-temperature range is 50 to 140F.
Mounting
Mount at rotational center to prevent side loading. Fasten either the top or the bottom half of the coupling (but not both) using the tapped holes provided. If the coupling has steel tubing lines, fastening the other half is not absolutely required, although an anti-rotational key is recommended. Do not use NPT fittings.
Parts Specification
| Minimum Operating Pressure (PSI) | Leakage Rate (cu In./min) | Maximum Flow Rate (cu In./min) | Weight (lbs) |
| 150 PSI | 0.037 cu.in./min | 493 cu.in./min | 10.1 lbs. |
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