Two Stations for Load/Unload
Commonly Controlled
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7500 psi max
FEATURES: For rotary index tables with two side-by-side load/unload stations (commonly controlled). Unload and reload while all other stations remain clamped. Automatically unclamps at the first load/unload station and reclamps at the second, or can be controlled with a clamping valve.
MODELS AVAILABLE: Choose from the following standard configurations — see Dimensions page for part numbers:| | 5 Stations | | | 6 Stations (also for 2 and 3 stations) | | | 8 Stations (also for 4 stations) | | | 10 Stations |
Couplings for 6 and 8 stations are used for indexing tables with 2, 3, and 4 stations by plugging unused ports. For special Rotary Valve Couplings with additional stations or special features, please contact factory.
OPERATION: One half of the Rotary Valve Coupling rotates with the index table, while the other half remains stationary. Each time the table and coupling index, a new station automatically becomes the unload station. The coupling supplies fluid to the loading stations separately from all other stations. Loading stations can be unclamped and reclamped automatically as the coupling rotates, or controlled by a separate clamping valve.
CLAMPING AUTOMATICALLY: To automatically unclamp and reclamp the loading stations as the coupling rotates, connect the coupling's return line R directly to the power source's reservoir port (no pressure). To avoid any pressure drop as the table indexes, the power source's fluid flow rate (cu. in./min.) should be at least 240 times the fluid required at any one clamping station (cu. in.); otherwise an accumulator must be installed on the pressure line from the power source.
CLAMPING MANUALLY: The loading stations can be unclamped and reclamped by a hand-operated, cam-operated, or solenoid-operated clamping valve mounted off of the rotary table. This insures that a new workpiece will not move accidentally during indexing, before it is securely clamped.
MOUNTING: Firmly fasten either the top or the bottom half of the coupling (but not both) using the tapped holes provided. Install a floating reaction bar to prevent the other half of the coupling from rotating. Mount coupling at the center of rotation, either above, below, or on the rotary table.
FLUID CONNECTION: All ports are 1/4" BSPP (install Port Plugs CLR-810-F in any unused ports). Fitting installation torque must be 28-35 ft-lbs. Do not use NPT fittings.
DESIGN CONSIDERATIONS: To use a standard Rotary Valve Coupling, the table must rotate through exactly the same angle during each indexing movement. Turning the coupling requires additional table-motor starting torque, especially when clamping automatically during indexing. Maximum rotational speed is 10 RPM. Use either standard hydraulic fluid (CLR-2-FL) or other hydraulic fluid of the viscosity classes HLP 22, 32, or 46. Contact factory regarding the use of any other hydraulic-fluid types. Fluid must be clean (10 micron or better nominal filtration). Do not turn the coupling while dry, even before installation (fill any unused ports with fluid before plugging). Although couplings are well sealed, an external cover may be necessary to protect the bearing surfaces in cases of extreme dirt and grit. While the load stations are unclamped, there is a slight return-line internal leakage rate; therefore installing an accumulator is strongly recommended, especially above 3000 psi. |
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