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Impro Fluidtek Hydraulic Motors – Powerful Drives for every Application
The roots of Impro Fluidtek hydraulic motors date back to 1976, when Harvey and Hollis White, Jr. founded White Drive Products in the USA. The company played
a decisive role in the development of orbital motors and established itself as a leader in quality. Learn more...
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Later, Danfoss Power Solutions took over the business, further expanding innovation and global reach. A milestone occurred in 2022: Impro Fluidtek acquired the orbital motor business of Danfoss Power Solutions (Jiangsu) Co., Ltd. With this acquisition, the company secured not only technologies and patents but also the valuable know-how of the workforce—around 85% of Danfoss employees joined Impro Fluidtek. The Zhenjiang site, once the first global innovation center outside Denmark for Danfoss, now forms the core of manufacturing and development.
Portfolio and Performance
The current product range includes 11 orbital motor series and one brake series, covering power ranges from compact applications to powerful solutions for heavy-duty operations:- Light-duty applications (up to 18 kW): Series WG, WP, WD, WR
- Medium-duty applications (up to 22 kW): Series CE, RE, WS, WM
- Heavy-duty applications (up to 33 kW): Series WZ, WT
- Hydraulic brakes: ABR series with high holding torque
Quality, Compatibility and Flexibility
Impro Fluidtek hydraulic motors impress with durability, high torque, and versatility. With more than 4,500 possible motor combinations, individual requirements can be met precisely. Thanks to compatibility with leading manufacturers such as Eaton and White, existing systems can be easily upgraded or replaced.Why Choose Impro Fluidtek Hydraulic Motors?
Choosing Impro Fluidtek hydraulic motors means relying on products that continue the legacy of White Drive and Danfoss while setting new benchmarks in efficiency and reliability. The combination of decades of experience, state-of-the-art manufacturing, and continuous innovation makes Impro Fluidtek a strong partner for hydraulic solutions in agriculture, construction, material handling, and many other industries.Impro Fluidtek Hydraulic Motors – Frequently Asked Questions
What is Impro Fluidtek and what experience does the company have in the field of orbital motors?
Impro Fluidtek is a company with 48 years of experience in the development and production of orbital motors. The company has manufactured over 3 million orbital motors and operates a state-of-the-art plant. The orbital motor business originally traces back to White Drive Products, founded in 1976 in the USA. After being acquired by Danfoss Power Solutions in 2005, the business was purchased by Impro Fluidtek in 2020, continuing a long tradition in this specialized field.
Where is Impro Fluidtek’s headquarters and innovation center located, and what are its capabilities?
The new headquarters of Impro Fluidtek is located in Zhenjiang, Jiangsu, China, about two hours from the Port of Shanghai. The 40,000 m² campus, commissioned in January 2024, represents an investment of USD 100 million. It serves as a state-of-the-art manufacturing and innovation center, increasing capacity by 150%. The site employs 200 people, around 85% of whom came from the former Danfoss workforce, and is currently operating at 60% capacity.
What role does research and development (R&D) play at Impro Fluidtek, and what key innovations has the company achieved?
Impro Fluidtek has a strong R&D foundation, originally established by White Drive in 2005 and expanded into a global R&D center in 2009. Over the years, the company has registered 24 patents, including a PCT patent for a distributor design aimed at improving volumetric and mechanical efficiency. Other notable developments include a custom-designed rotor valve to reduce pressure pulsations and enhance efficiency, as well as a proprietary pressure-compensated balancing plate that improves volumetric efficiency at low flow and high pressure—especially during motor start-up. The RE 550 series was nominated for the AGRITECHNICA 2023 Systems & Components Trophy – Engineers’ Choice.
What product range of orbital motors does Impro Fluidtek offer?
Impro Fluidtek offers a broad portfolio of orbital motors divided into three main categories:
• Light-duty (up to 18 kW): Series WM, WD, and WP
• Medium-duty (up to 22 kW): Series WR, WG, WS, and CE
• Heavy-duty (up to 33 kW): Series RE, WT, and WZ
In addition, the company provides stand-alone hydraulic brakes (ABR series) and accessories. Future series such as ASB and AFB are also under development. Impro Fluidtek holds a perpetual license for the intellectual property of all legacy White Drive and Danfoss products.
• Light-duty (up to 18 kW): Series WM, WD, and WP
• Medium-duty (up to 22 kW): Series WR, WG, WS, and CE
• Heavy-duty (up to 33 kW): Series RE, WT, and WZ
In addition, the company provides stand-alone hydraulic brakes (ABR series) and accessories. Future series such as ASB and AFB are also under development. Impro Fluidtek holds a perpetual license for the intellectual property of all legacy White Drive and Danfoss products.
What testing capabilities does the Impro Fluidtek engineering test laboratory offer?
The Impro Fluidtek engineering test laboratory is fully equipped to ensure the performance and durability of its products. Testing capabilities include performance tests (up to 310 bar at 250 l/min), overall efficiency tests (mechanical and volumetric), variable static and dynamic torque tests, radial load tests at variable speed, shaft seal tests, harmonic tests with variable speed flywheel, fatigue tests (up to 310 bar at 250 l/min), burst tests, and accelerated lifetime tests. In addition, customer-specific applications and benchmarking are conducted.
What are the main differences between Impro Fluidtek’s WD and WG orbital motor series?
The WD and WG series show several key differences:
• Gear set: WD uses a Gerotor, while WG uses a Geroller.
• Valve design: WD has a spool valve, WG a disc valve.
• Bearings: WD uses sleeve bearings, WG needle bearings.
• Motor type: WD is a three-zone motor, WG a two-zone motor.
• Check valves: WD includes integrated check valves, WG does not.
• Drain port: WD has a drain port, WG does not.
• Performance: WD 25–386 cm³/rev and max. 173 bar; WG 41–404 cm³/rev and max. 190 bar.
• Gear set: WD uses a Gerotor, while WG uses a Geroller.
• Valve design: WD has a spool valve, WG a disc valve.
• Bearings: WD uses sleeve bearings, WG needle bearings.
• Motor type: WD is a three-zone motor, WG a two-zone motor.
• Check valves: WD includes integrated check valves, WG does not.
• Drain port: WD has a drain port, WG does not.
• Performance: WD 25–386 cm³/rev and max. 173 bar; WG 41–404 cm³/rev and max. 190 bar.
How does the WP series differ from the WG series, and what are the advantages of the WP series?
The WP and WG series also differ in several ways:
• Gear set: WP uses a Gerotor, WG a Geroller.
• Valve design: WP has a spool valve, WG a disc valve.
• Bearings: WP can have sleeve or needle bearings; WG uses needle bearings. The WP series with needle bearings (157/158 series) offers higher side load capacity.
• Motor type: WP is a three-zone motor, WG a two-zone motor.
• Check valves & drain port: WP includes both, WG does not.
• Performance: WP 25–388 cm³/rev and max. 175 bar; WG 41–404 cm³/rev and max. 190 bar.
The WP series stands out for its versatility and optional higher side load capacity.
• Gear set: WP uses a Gerotor, WG a Geroller.
• Valve design: WP has a spool valve, WG a disc valve.
• Bearings: WP can have sleeve or needle bearings; WG uses needle bearings. The WP series with needle bearings (157/158 series) offers higher side load capacity.
• Motor type: WP is a three-zone motor, WG a two-zone motor.
• Check valves & drain port: WP includes both, WG does not.
• Performance: WP 25–388 cm³/rev and max. 175 bar; WG 41–404 cm³/rev and max. 190 bar.
The WP series stands out for its versatility and optional higher side load capacity.