Synchronous Power Units - Hydra-Slide

Synchronous
Power Units

Hydra-Pac Synchronous Power Units provide synchronized control of multiple hydraulic cylinders. They are suitable for operation of all Hydra-Slide Skidding Systems, Turntables, Climbing Jacks, and other double-acting jacking applications. These power units are designed with multiple independent oil circuits, providing equal flow to each line regardless of weight distribution and allowing the operator to raise or lower virtually any load equally on all points.

Hydra-Pac Synchronous Power Units provide synchronized control of multiple hydraulic cylinders. They are suitable for operation of all Hydra-Slide Skidding Systems, Turntables, Climbing Jacks, and other double-acting jacking applications. These power units are designed with multiple independent oil circuits, providing equal flow to each line regardless of weight distribution and allowing the operator to raise or lower virtually any load equally on all points.

Features

Pressure gauges and pressure reliefs on each circuit

Manually operated master control valve and individual circuit control valves

Features include a steel safety guard to protect the hydraulic table and valves, lifting lugs, forklift pockets, wheels, and a braking handle

Technical information

Diesel Engine

*Ports can be combined in pairs to double the available flow rate

Propane Engine

*Ports can be combined in pairs to double the available flow rate

Electric Motor

†Other voltage options may be available upon request

*Ports can be combined in pairs to double the available flow rate

Diesel Engine

*Ports can be combined in pairs to double the available flow rate

Propane Engine

*Ports can be combined in pairs to double the available flow rate

Electric Motor

†Other voltage options may be available upon request

*Ports can be combined in pairs to double the available flow rate

Support

Power Unit Features & Comparison

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What is the advantage of using a synchronous power unit?

Synchronous power units are simpler and safer than some other hydraulic pumps for jacking and skidding operations. First, they are designed for field conditions—no computers, wires, or transducers to set up or calibrate. The system is built with manual, mechanical controls. Second, they provide synchronous movement of cylinders on individual ports. The ports are not connected to each other and will give equal flow to each line regardless of the weight of the load or the pressure in that circuit.

What makes a synchronous power unit function synchronously?

One of the keys to the synchronous function is the split-flow, checkball piston pump. It incorporates multiple independent pistons driven by a common shaft, which ensures that each piston generates the same flow rate. Because of the relative incompressibility of oil and the sealing ability of the checkballs, the flow rate is virtually unaffected by the pressure.

We would like to use an SPU with both single and double-acting cylinders. Is this possible?

Yes it is. Our synchronous power units are equipped with counterbalance valves on the pressure ports. These function to control the lowering of a cylinder that is under load by using the return-side pressure to open the valve. They act as a brake. When using single-acting jacks, there is no return line, and so we control the lowering speed by using a separate flow control. The flow control valves allow free flow in one direction (towards the cylinder) and control the flow in the other (back from the cylinder). The hydraulic hose is connected from the return port of the pump (with the flow control valve) to the cylinder port. The flow control valve is closed so that oil can only flow to the cylinder. When you wish to lower the cylinder, the flow control valve is opened gradually to allow oil to flow out of the cylinder and lower it in a controlled manner. Keep in mind that when lowering single-acting jacks, they will not necessarily be synchronized.

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Frequently Used Together

Hydraulic Jacks

We work with some of the top manufacturers of high-quality, field-proven hydraulic cylinders. We proudly offer a range of PowerTeam double-acting steel jacks and Orbit double-acting aluminum jacks for lifting and lowering applications. Other models may be available on request.

Climbing Jacks

Climbing Jacks incorporate a hydraulic cylinder inverted inside a specially designed load casing. As the jacks are extended and retracted, block piles are progressively built under the jack for a fast and safe means of raising or lowering large loads or structures.

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Looking for more information on heavy load moving systems? Explore our full line of Hydraulic Skidding Systems, including low-profile slide systems, heavy track skidding systems, and turntable solutions for load rotation. Whether you’re planning a transformer move, industrial rigging project, or need support selecting the right system, our How to Buy guide and Customer Service team are here to help. Learn more about Hydra-Slide applications, view additional case studies, or contact us directly for a consultation.

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