109 B series Compact hydraulic power unit

The 109 B series Compact Hydraulic Power Unit features a space-saving design, combining a DC motor, gear pump, oil tank, internal valve, check valve, and safety valve. With a focus on maintaining load and ensuring zero leakage, the unit operates on an S3 working system, offering four standard pump sizes (0.25, 0.32, 0.38, and 0.45 cc/Rev) and supports both unidirectional and bidirectional rotation systems.


Main Components The 109 B Series compact hydraulic power unit is comprised of a direct current motor, gear pump, oil tank, internal valve, check valve, and safety valve. The check valve and safety valve are designed to maintain load and ensure zero leakage. This series operates on an S3 working system and offers four standard pump sizes with displacements of 0.25, 0.32, 0.38, and 0.45 cc/Rev. The entire series provides both single-direction and bi-directional rotation systems.

Key Features

  • Comfortable and low noise
  • High power 
  • Zero leakage
  • Multiple oil route options
  • Manual operation for power failure
  • Small size,does not take up space

hydraulic power unit function

Wide Application Range The 109 B series is suitable for various industrial applications, such as electric forklifts, electric stackers, lifting platform trucks, hydraulic cranes, and other small industrial equipment.

Specification Overview

Item Options
Machine Type 109 B
Motor 12: 350W ,12VDC
24: 350W ,24VDC
Gear Pump Displacement 25:0.25 CC/REV
32:0.32 CC/REV
38:0.38 CC/REV
45:0.45 CC/REV
Oil Port Size BB: Single acting oil circuit
AA: Double acting oil circuit
CC: Double acting oil circuit
DD: Double acting oil circuit
EE: Double acting oil circuit
Oil Tank Capacity 01:0.8L(Only 109B)
02: 1.2L
03: 1.5L
04: 2.0L
05: 4.0L
06: 6.0L
Oil Port Size 01:7/16-20(SAE -4)
03:9/16-18 (SAE-6)
Standard Pressure 20: 20MPA
Installation Direction HA: Horizontal installation
VC: Vertical installation

109 B hydraulic power unit product size drawing-1

Product size drawing

109 B hydraulic power unit product size drawing-2

AA:109B,Single acting oil route


High-Quality Manufacturing The motor of the 109 B hydraulic power unit is independently developed, featuring excellent sealing, high efficiency, and powerful performance. With its compact structure and high transmission efficiency, this power unit delivers numerous advantages, making it an ideal choice for various applications.

Zero Leakage Check Valve Design The check valve is designed to maintain pressure without leakage for an extended period, ensuring reliable performance and increased efficiency.

Advanced Gear Pump Material The gear pump is made of automotive transmission gear steel, processed using automatic gear hobbing machines and automatic grinding machines. It ensures high mechanical efficiency and volumetric efficiency, along with low noise levels and lightweight design.

Manual Operation During Power Outage In case of a power outage, simply open the rubber cover and use an electric tool to rotate the motor shaft, allowing the system to

operate normally. This manual operation feature ensures continuous functionality even in the absence of power supply, providing added convenience and reliability to the users.

Compact Structure and High Efficiency The 109 B series boasts a small, semi-enclosed, multi-angle design, which not only facilitates easy installation but also protects the motor and oil tank. Manufactured using high-quality aluminum and stainless steel materials, the unit’s surface is precision-engineered to guarantee high accuracy and reliability in operation.

Silent Operation The 109 B series power unit has a low-noise motor that operates at less than 55dB, providing a comfortable and quiet working environment without compromising on performance and efficiency.

In conclusion, the 109 B Series Compact Hydraulic Power Unit offers a powerful and efficient solution for a wide range of industrial applications. Its key features, such as zero leakage, low noise levels, multiple oil circuit options, manual operation during power outages, and compact size make it an ideal choice for various equipment, including electric forklifts, stackers, lifting platforms, and hydraulic cranes. With its advanced motor and gear pump technology, precision manufacturing, and innovative design, the 109 B series power unit is sure to meet and exceed your performance expectations.


hydraulic power unit application


Rotontek is a well-known brand specializing in the design and production of high-quality hydraulic power units and equipment. With an extensive product range, including the 109 B series Compact Hydraulic Power Unit, the 119 Hydraulic Power Unit, Electric Hydraulic Cylinder EHC-6335500-16HC, and Electric Forklift Drive Assembly 850W DL210 Brushless Electric Drive Wheel, Rotontek is committed to delivering innovative solutions for a variety of industries and applications.

The 119 Hydraulic Power Unit: A Powerful and Reliable Choice Building on the success of the 109 B series, Rotontek’s 119 Hydraulic Power Unit offers enhanced performance and reliability. Designed for heavy-duty applications, the 119 unit features a robust motor, a high-capacity oil tank, and multiple oil circuit options. Its precision engineering ensures a long service life and consistently exceptional performance across a wide range of applications.

Electric Hydraulic Cylinder EHC-6335500-16HC: Advanced Lifting Solution Rotontek’s Electric Hydraulic Cylinder EHC-6335500-16HC is designed to deliver reliable and efficient lifting and positioning solutions. Its advanced design incorporates a powerful electric motor, a high-capacity hydraulic cylinder, and precise control mechanisms. With its energy-efficient operation and low-maintenance requirements, the EHC-6335500-16HC is an ideal choice for industries looking for a dependable and cost-effective lifting solution.




Electric Forklift Drive Assembly 850W DL210 Brushless Electric Drive Wheel The Electric Forklift Drive Assembly 850W DL210 Brushless Electric Drive Wheel is yet another innovative product from Rotontek, designed specifically for electric forklifts. The assembly features a high-performance brushless electric motor, delivering smooth and efficient power transfer to the drive wheel. Its compact and lightweight design allows for easy installation and reduced maintenance, making it an attractive choice for businesses looking to upgrade their forklift fleets.

Rotontek’s commitment to innovation and quality has made it a preferred brand for hydraulic power solutions in various industries. Its extensive product range, including the 109 B series and 119 Hydraulic Power Units, Electric Hydraulic Cylinder EHC-6335500-16HC, and Electric Forklift Drive Assembly 850W DL210 Brushless Electric Drive Wheel, showcases the company’s dedication to meeting the diverse needs of its customers. With its unwavering focus on customer satisfaction, Rotontek continues to be a leading provider of reliable, efficient, and cost-effective hydraulic solutions.

Additional information

Machine type



12:350W,12V DC
24:350W,24V DC

Gear pump displacement

25:0.25 cc/rev
32:0.32 cc/rev
38:0.38 cc/rev
45:0.45 cc/rev

Oil route option

BB Single acting oil route
AA Double acting oil route
CC Double acting oil route
DD Double acting oil route
EE Double acting oil route

Oil tank capacity

01:0.8L(Only 109B)
02:1.2L 03:1.5L
04:2.0L 05:4.0L

Oil port size

01:7/16-20(SAE -4)
02:G1/8 in Pipe(BSPP)
03:9/16-18 (SAE-6)

Standard pressure


Installation direction

HA:Horizontal installation
VC:Vertical installation


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