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Compact Hybrid Power Unit

Modernize Hydraulics. Designed for Flexible Integration.

The Kyntronics Compact Hybrid Power Unit – Power Unit Only (SPU) provides the core compact power unit while giving engineers the flexibility to integrate the motor and drive of their choice.

Designed to connect to existing hydraulic cylinders or rotary motors, it provides a compact way to modernize hydraulic power without redesigning the entire system.

Up to 3,000 psi (207 bar) | Up to 11.98 gpm (45.35 L/min)

CONFIGURE YOUR POWER UNITReview Your Application
Overview
Specifications
Design Features & Options
Motor Mounting Information

Modernize Hydraulic Power. Integrate It Your Way.

The Compact Hybrid Power Unit (SPU) – Power Unit Only gives engineers greater control over how compact hydraulic power is incorporated into a machine or system. By separating the power unit from the motor and drive selection, engineers can build around existing electrical standards, controls platforms and machine requirements while gaining the benefits of a compact, power-on-demand hybrid design.

Why Choose SPU Power Unit Only?

Integrate Your Preferred Motor & Drive: Pair the compact power unit with the motor and drive selected for your machine or existing control platform, providing greater flexibility over the electrical and controls architecture.

Modernize Existing Hydraulic Systems: Replace traditional hydraulic power units while retaining existing cylinders, rotary motors and mechanical components where appropriate, helping reduce the engineering and mechanical redesign required for a retrofit.

Distribute Hydraulic Power: Reduce the need for centralized hydraulic infrastructure, long hose runs, large reservoirs and associated components by locating hydraulic power closer to where it is needed.

Reduce Maintenance & Leak Points: A more compact hybrid design reduces hoses, fittings and fluid volume, helping minimize potential leak points, maintenance requirements and hydraulic fluid management.

Improve Energy Efficiency: Rather than continuously circulating hydraulic fluid, the SPU uses power only when the application requires it, helping reduce unnecessary energy consumption and heat generation.

Configured to Your Application

Compact Hybrid Power Units are available in three basic configurations to fit a variety of application requirements.

Standard SPU Configuration

Application Example
Boom Positioning with a Standard SPU
  • Operates a single cylinder or a rotary motor
  • Reservoir for rod compensation

SPU Multi-Port Configuration

Application Example
Oil & Gas Valve Automation with a Multi-Port SPU
  • Connect with multiple cylinders or rotary actuators (up to 16) with independent control using solenoid operated ports (sextet image shown)
    • Clamping cylinders
    • Lifts
    • Valve operation
      • Open / Close
      • Position Control

SPU Multi-Power Unit Configuration

Application Example
Rocket Nozzle Testing with a Multi-Power Unit SPU
  • Produces higher speed and flow
  • Can switch from multiple Power Units for high speed, then to a single unit for slow speed accurate force control
  • Allows two or more Power Units operating in parallel

Control a Range of Hydraulic Devices

 

 

Hydraulic Cylinders

 

 

Linear Washdown Cylinders
(shown with internal position sensor)

Rotary Actuators

Rotary Quarter-Turn Valves

Pair Your SPU with Hydraulic Components from Kyntronics

The Compact Hybrid Power Unit can be configured with hydraulic components supplied by Kyntronics, including:

  • Hydraulic Cylinders
  • Linear Washdown Cylinders
  • Rotary Actuators

Linear Cylinder Options: Standard • Stainless Steel • Epoxy Coated • Nickel Plated

Where are Compact Servo Power Units (SPUs) typically used?

SPUs are used in new and retrofit applications where a compact, servo-controlled alternative to traditional HPUs are needed. They connect via short hoses to a linear cylinder or rotary actuator. Common uses include presses, mobile equipment, valve actuation, and washdown environments.

What benefits does a Compact Hybrid Power Unit (SPU) provide compared to a traditional hydraulic power unit (HPU)?

SPUs provide energy-efficient, power-on-demand operation, a sealed, low-maintenance design, and a compact footprint.

I want to upgrade from a traditional hydraulic power unit, but I want to use the existing cylinders that are connected to it. What are my options?

SPUs are designed for retrofit applications, connecting directly to existing cylinders or rotary actuators via short hoses. This allows you to upgrade to servo control while reducing energy use, leaks, and maintenance.

Specifications for SPU Series Compact Hybrid Power Unit Only Option

The Compact Hybrid Power Unit is available in a range of sizes and configurations to meet application-specific pressure, flow, and power requirements. The specifications below outline available SPU options to help identify the appropriate configuration based on system performance requirements.

 

Click here for the complete part number breakdown and description of components.

Series / Model Number Alpha-Numeric Designation: SPUxxM0Z

 

SPUxx: designates the pump size – for example

  • SPU02 is a size 2 pump
  • SPU21 is a size 21 pump
  • SPU36 is a size 36 pump
ModelPumpMotorPressure
(psi)		Flow
(gpm)		Input Torque @ Rated Pressure (in-lbf)Input RPM @ Rated Flow (rpm)
SPU02P02M0Z30000.179.683000
SPU05P05M0Z30000.422.593000
SPU07P07M0Z30000.6637.123000
SPU11P11M0Z30001.0659.713000
SPU13P13M0Z25981.6379.663000
SPU21P21M0Z30001.85104.893000
SPU23P23M0Z30002.23125.873000
SPU27P27M0Z30002.97167.833000
SPU31P31M0Z30004.17236.013000
SPU34P34M0Z30005.38304.193000
SPU36P36M0Z25317.05336.283000
SPU45P45M0Z30005.99338.883000
SPU47P47M0Z30007.7435.713000
SPU49P49M0Z300010.27580.943000
SPU51P51M0Z300011.98677.763000

Compact Hybrid Power Unit - Power Unit Only Design Features

Compact Hybrid Power Units (SPU) incorporate numerous design features that make them an ideal alternative to traditional hydraulic power units.

  • Up to 10.3 GPM (43.2 LPM) at 3,000 PSI
  • AC and DC motor compatible (24 – 80 VDC, 120 – 460 VAC)*
  • Works with most any double-acting linear cylinder or rotary actuator using standard ISO 16028 3/8” connections
  • Easily adapts to existing cylinders or rotary actuators
  • Power-on-demand, efficient operation saves energy*
  • Motor mounting adaptor and shaft coupling for customer-supplied motors
  • Minimal fluid volume
  • Standard ISO68 fluid
  • Adjustable relief valves (extend and retract) eliminate overpressure
  • Smooth control eliminates abrupt flow changes and stress on hoses and connections*
  • Dynamic braking for smooth control of overriding loads*
  • Automatic fill feature for simplified maintenance
  • Unpressurized and pressurized versions

*Based on the capability of the customer-supplied motor/control system

Compact Hybrid Power Unit - Optional Features

Additional optional features provide flexibility.

  • Locking solenoid valves (extend and/or retract)
  • Counterbalance valves (extend and/or retract)
  • Float Mode
  • Standard or high-resolution position sensor for position measurement and control
  • Pressure sensors for force measurement and control
  • Explosion Proof package with intrinsically safe sensors
  • Fail safe power loss feature
  • Manual backup pump
  • Food-grade fluid
  • Fire-resistant fluid
  • IP67, IP68, IP69k packaging
  • Special coatings
When should I choose a Compact Power Unit (SPU) instead of a Hybrid Linear Actuator (SHA)?

An SPU may be a better choice when the application uses existing or customer-preferred hydraulic cylinders, requires rotary motion or multiple hydraulic functions, benefits from locating the hydraulic power source separately from the actuator, or when retaining the existing mechanical design can help avoid costly or unnecessary machine redesign.

I want to upgrade from a traditional hydraulic power unit, but I want to use the existing cylinders that are connected to it. What are my options?

SPUs are designed for retrofit applications, connecting directly to existing cylinders or rotary actuators via short hoses. This allows you to upgrade to servo control while reducing energy use, leaks, and maintenance.

Motor Mounting Information for SHA Actuator Only and SPU Power Unit Only Options

Kyntronics’ “Power Unit Only” Option is designed to make the mounting of most standard commercially available motors simple and straightforward.

Motor Mounting Information

Upon determination of the motor frame size and shaft diameter, Kyntronics will determine which of our standard motor mounts and shaft couplings adapt to your choice of motor, and we will include that in the final product configuration.

Kyntronics also offers a service where we will attach customer-supplied motors to the actuator or power unit prior to shipment.

PumpManifold SizeMotor B.C.D. (A)Motor Shaft Dia (B)Keyed ShaftMotor Brake
P02, P05, P07, P11, P13Small70mm - 100mm14mm - 19mmOptionalNo
P21, P23, P27, P31, P34, P36Medium100mm - 165mm19mm - 38mmYesNo
P45, P47, P49, P51Large165mm - 215mm28mm - 42mmYesNo
Motor Mounting Diagram
How easy is it to connect a Servo Power Unit to a Rockwell Automation control system?

SPUs integrate easily with Rockwell Automation Kinetix drives, servo motors, and PLCs. Kyntronics provides a dedicated AOI, sample projects, and integration resources to simplify setup and reduce programming time.

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