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SPU Series Compact Servo Power Unit – Power Unit Only

Compact Servo Power Units
Connects to the Motor and Drive of Your Choice

SPU Series Compact Servo Power Unit – Power Unit Only

Benefits

totally sealed design
Totally Sealed Design
Shock & side-load tolerant
Shock Load Tolerant
Energy efficient icon
Energy Efficient
Precise Control icon
Precise Servo Control
Environmentally friendly icon
Environmentally Friendly
Minimal maintenance icon
Minimal Maintenance
No Metal-to-Metal Wear
No Metal-to-Metal Wear

Key Features

PSI icon
Up to 3,000 PSI (207 BAR)
GPM icon
Up to 11.98 GPM (45.35 LPM)

Servo Power Units combine hydraulic power with the controllability of electric servo systems to deliver efficient and precise motion control. By generating hydraulic pressure only when motion is required, the SPU provides power-on-demand operation that improves energy efficiency compared to traditional hydraulic power units.

The Kyntronics SPU Series Compact Servo Power Unit – Power Unit Only option provides the core servo power unit while allowing engineers to integrate the servo motor and drive of their choice. It connects to your existing hydraulic cylinders or rotary motors via short hoses with robust fittings. Due to its flexible configurations, the servo power unit only option is a good fit for new or retrofit applications.

Overview
Servo Power Unit Specifications
Design Features and Options
Motor Mounting Information

Overview of SPU Series Compact Servo Power Unit Only Option

Specifications based on pump size

ModelManifold SizeMaximum Pressure
psi (bar)		Maximum Flow
gpm (lpm)
SPU02Small3000 (207)0.17 (0.64)
SPU05Small3000 (207)0.4 (1.51)
SPU07Small3000 (207)0.66 (2.5)
SPU11Small3000 (207)1.06 (4.01)
SPU13Small2598 (179)1.63 (6.17)
SPU21Medium3000 (207)1.85 (7)
SPU23Medium3000 (207)2.23 (8.44)
SPU27Medium3000 (207)2.97 (11.24)
SPU31Medium3000 (207)4.17 (15.79)
SPU34Medium3000 (207)5.38 (20.37)
SPU36Medium2531 (175)7.05 (26.69)
SPU45Large3000 (207)5.99 (22.67)
SPU47Large3000 (207)7.7 (29.15)
SPU49Large3000 (207)10.27 (38.88)
SPU51Large3000 (207)11.98 (45.35)
SPU Only Solution - 3 sizes
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 Servo 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. Built-in servo control allows for precision position and force control, eliminating the need for external controls, making them a cost-effective alternative to traditional HPUs.

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 Servo Power Unit Only Option

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

Design and Optional Features for SPU Series Compact Servo Power Unit Only

The Servo Power Unit Only Option connects to a customer-supplied cylinder or rotary actuator through robust quick-connect fittings. The SPU can be located close to the cylinder, reducing footprint and hose length, and it operates both linear cylinders and rotary actuators. The Servo Power Unit Only Option uses the motor and drive of your choice.

SPU Series Compact Servo Power Unit Only Design Features

SPU Series Servo Power Units incorporate numerous design features that make them an ideal alternative to traditional hydraulic power units.

  • Motor mounting adaptor and shaft coupling for customer-supplied motors.
  • AC and DC motor compatible.
  • Power-on-demand, efficient operation saves energy*
  • Precise servo control using external position sensor and integral pressure transducer. Smooth control eliminates abrupt flow changes and stress on hoses and connections.*
  • Dynamic braking for smooth control of overriding loads.*

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

  • Closed system eliminates contamination, moisture and air infiltration. Minimal fluid.
  • Works with most any double-acting linear cylinder or rotary actuator
  • Standard ISO 16028 3/8” cylinder connections
  • Up to 10.3 GPM (43.2 LPM) at 3,000 PSI
  • Adjustable relief valves (extend and retract) eliminate overpressure
  1. Customer-supplied cylinder or rotary motor and hoses
  2. Rod compensation reservoir
  3. Fill ports
  4. Quick connect Couplings



SPU Series Compact Servo Power Unit Optional Features

SPU Series Servo Power Unit optional features improve flexibility for many applications.

  • Motor mounting adaptor and shaft coupling for customer-supplied motors.
  • Locking solenoid valves (extend and/or retract).
  • Counterbalance valves (extend and/or retract).
  • Pressure transducers (extend and/or retract).
  • Float Mode.
  • Standard or high-resolution position sensor.
  • Pressure sensor for force measurement and control.
  • Food-grade fluid.
  • IP67, IP68, IP69k packaging.
  • Special coatings.
  1. Pressure sensors for force measurement
  2. Solenoid valve
  3. Quick-connect couplings

Can I use my existing cylinder with a servo power unit (SPU)?

SPUs are designed to connect directly to existing cylinders or rotary actuators using short hoses or piping. The unit includes the pump, motor, drive, and controls in a compact, integrated package.

Can Servo Power Units (SPUs) be used with customer-supplied cylinders or rotary actuators?

SPUs are commonly used with customer-supplied cylinders or rotary actuators, making them ideal for retrofit applications. This allows users to upgrade to servo control while improving energy efficiency and reducing maintenance.

Can a Servo Power Unit be used on both linear and rotary applications?

Servo power units can operate double-acting linear cylinders and rotary actuators, connecting through standard ISO 16028 fittings.

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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