Image

Regenerative circuits made easy

Nov. 9, 2012
Regenerative circuits save time and energy by increasing the extension speed of double acting cylinders. They do this by routing fluid exiting the rod end of the cylinder back to its cap end instead of routing the fluid to tank.
Download this article in .PDF format
This file type includes high resolution graphics and schematics when applicable.

Regenerative circuits save time and energy by increasing the extension speed of double acting cylinders. They do this by routing fluid exiting the rod end of the cylinder back to its cap end instead of routing the fluid to tank.

Speed valves allow easy incorporation of flow regeneration into circuits simply by connecting the valve’s three ports between a double-acting hydraulic cylinder and directional control valve.

Scanwill SV series speed valves make it simple to produce regenerative, double-acting hydraulic cylinder performance by adding a standard component to a conventional circuit. Manufactured by Scanwill Fluid Power ApS, Albertslund, Denmark, speed valves are piped between a cylinder and its directional control valve. A pilot-shifted spool interconnects the cylinder’s A and B ports for high-speed, low-pressure regenerative extension. When the circuit’s main directional control valve commands the cylinder to retract, the spring and pilot signal at the opposite end of the speed valve automatically shift it to send flow out of the A port directly to tank.

Functional schematics show high-speed, regenerative extension and normal-speed retraction using Type SV speed valve.

Rated for pressures to 500 bar, four SV series models handle flows of 40, 50, 120, and 200 lpm. They suit new installations or retrofits. These compact units are only 115-mm long and 35 mm in diameter. All fluid connections have 3⁄8-in. BSP threads. Speed valves do not affect cylinder retraction.

When power is important
SV-type speed valves are intended for applications where high-speed extension is important, not hydraulic power. A variation is the SVA type speed valve, which achieves both high speed and full cylinder force. It provides high-speed, low-pressure regenerative extension until a predetermined load pressure is encountered. The valve then automatically shifts to allow the full force of the cylinder to be applied.

Functional schematics show operation of Type SVA speed valve. High-speed extension is achieved by routing flow from the pump and the cylinder’s rod end into the cylinder’s cap end. When a predetermined load pressure is reached, the valve shifts to route only pump flow to the cap end and routes return flow from the rod end to tank.

Operation of speed valves is completely automatic; no additional controls are needed. Typical applications include presses, waste compactors, mobile equipment, and machine tools.

Contact Scanwill Fluid Power ApS at [email protected] or visit www.scanwill.com. Scanwill speed valves are available in North America from IC Fluid Power, Rossford, Ohio. Call them at (419) 661-8811 or visit www.icfluid.com.

Download this article in .PDF format
This file type includes high resolution graphics and schematics when applicable.

Continue Reading

Proximity sensors

Feb. 10, 2009
Series 7000 proximity sensors detect piston position on 2- to 8-in. bore tie rod cylinders. Selfadjusting clamp grips standard NFPA and custom cylinders. Range of custom circuits...

eBooks

Dec. 1, 2011
Learn about Fluid Power Basics and Circuits

Sponsored Recommendations

MONITORING RELAYS — TYPES AND APPLICATIONS

May 15, 2024
Production equipment is expensive and needs to be protected against input abnormalities such as voltage, current, frequency, and phase to stay online and in operation for the ...

All-In-One DC-UPS Power Solutions

March 13, 2024
Introducing the All-In-One DC-UPS, a versatile solution combining multiple functionalities in a single device. Serving as a power supply, battery charger, battery care module,...

Motor Disconnect Switches

March 13, 2024
With experienced Product Engineers and Customer Service personnel, Altech provides solutions to your most pressing application challenges. All with one thought in mind - to ensure...

DC Power Solutions: Streamlined Power Supplies for Every Need

March 13, 2024
CBI All In One UPS Power Solutions combine the requirements for several applications in just one device which can be used as power supply unit, battery charger, battery care module...