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Crane Hot Line

New Venturi Valves Speed Up Single-Acting Cylinders




March 21, 2018 - Enerpac, Menomonee Falls, Wis., has introduced new venturi valves that improve the reaction speed of single-acting spring- and load-return cylinders by up to three times.   

Venturi valves create a vacuum-like effect in a pump system, drawing the oil from the cylinder to the pump’s reservoir much more quickly. That increases the plunger’s retraction speed by up to three times. 

Venturi valves are available both in manual and electric configurations. Enerpac also offers retrofit kits for field installation on existing pumps for manual valves and solenoid-operated valves.   

“These new valves are used in many applications throughout the industry,” said Jay Baudhuin, senior global product manager-pumps. “Some examples are assisting the return stroke of single-acting cylinders in presses and plunger attachments and completely returning low-height high-tonnage cylinders after lifting a bridge deck.”   


Venturi valves are excellent for improving the efficiency of high-tonnage cylinders. The retraction speed for spring-return models can be slower than desired. Once the load is removed from a load-return cylinder, the plunger will not fully retract without additional equipment to force the plunger back into the base of the cylinder. Venturi valves can help.


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