In hydraulic systems, the pump often defines the performance ceiling. Enter the OT 200 gear pump series-a precision-built, fixed-displacement workhorse designed to withstand demanding environments and deliver dependable fluid power. Over the course of this article, we'll explore what the OT 200 really is, how it functions, and the types of machinery that draw on its capabilities.
What is the OT 200 Gear Pump?
Definition & Product Position
The OT200 is a fixed-displacement external gear pump (i.e., two meshing external gears carrying fluid from suction to discharge) intended for open-loop hydraulic circuits.
It is part of the "Group 2" aluminium-gear-housing series of the manufacturer Brevini (now under Dana) Motion Systems.
In other words: it is designed to serve as a reliable building block pump for hydraulic systems where you need moderate to high pressure, good reliability, installation flexibility, and standardized mounting/shaft/port options.
Construction & Design Highlights
Housing: The pump uses an extruded aluminium-alloy gear housing, which gives a lightweight structure, coupled with cast-iron mounting flanges and end covers for enhanced mechanical strength under high loads.
Internal Components & Bearings: Typically precision-machined gear wheels, supported by sleeve bearings (and in some versions coated bushings) to handle good durability, low internal leakage, and low noise.
Mounting/Shaft/Ports Flexibility: The OT200 series offers a wide choice of shaft types (tapered, splined), mounting flanges (European standard, SAE), and port threads or flanges. This flexibility means the pump can be adapted to many different machine/hydraulic system configurations.
Efficiency & Noise: According to the manufacturer, the design emphasises "very good mechanical and volumetric efficiency" and "low noise levels" in the context of its size and pressure class.
How the Dana Brevini OT200 Gear Pump Works
Basic Operating Principle
At its core, the OT200 is a fixed displacement external gear pump. That means for each revolution of its gears, a set volume of fluid is moved from the suction side to the discharge side. Key steps:
- Suction intake – As the driving gear rotates, the gear teeth on the suction side pull apart, creating an expanding volume. That expansion causes a local drop in pressure which draws hydraulic fluid into the cavities formed between the gear teeth and the pump casing.
- Transport of fluid – The fluid becomes trapped in the space between the gear tooth, the casing and the adjacent gear tooth and is carried around the outside of the meshing area along the pump housing. This path avoids the meshing point until fluid reaches the discharge side.
- Discharge – When the fluid reaches the region where the gear teeth begin to mesh, the available volume is reduced and the fluid is forced out through the discharge port. Because the gears are meshing, the fluid is squeezed out, delivering hydraulic pressure.
Because of the fixed gear geometry, for every rotation you get essentially the same volume (minus leaks), so flow rate is proportional to rotational speed.
What the OT200 Design Adds
While the basic principle is shared by many external‐gear pumps, the OT200 has design features that elevate its performance:
- The aluminium housing plus cast iron flanges and covers help the pump run at higher pressures and endure tougher mechanical loads.
- Tight mechanical clearances (gear tooth to housing, gear to gear mesh) help reduce internal leakage, improving volumetric efficiency and enabling the pump to maintain higher pressure. The manufacturer catalogue states "very good mechanical and volumetric efficiencies and low noise levels".
- Flexibility in shaft, flange, port configuration allows the pump to be adapted to a variety of drive conditions and machine interfaces, which means the operational setup (speed, direction, mounting) can be optimized for specific applications.
What Machinery Is the Dana Brevini OT200 Gear Pump Applied To?
Typical Machinery & Systems
The OT200 shows up in a range of hydraulic equipment across mobile and industrial sectors. Some examples:
Mobile/off-highway equipment: Construction machines such as excavators, loaders, backhoes; material-handling machines like telehandlers and forklifts. The pump's robust design makes it suitable for mobile hydraulics under heavy load.
Agricultural machinery: Implements and tractors often have auxiliary hydraulic systems-powering attachments, steering, implements-where a fixed displacement gear pump like OT200 can provide dependable flow/pressure.
Industrial hydraulic systems: Hydraulic power packs, presses, forming machines, manufacturing automation systems. The specification sheet for OT200 notes it is "designed for heavy working conditions … capable of transmitting high hydraulic powers."
Marine/off-shore and specialist vehicles: While specific machine listings may not always be published, supplier descriptions highlight suitability for "mobile equipment, construction, agriculture, material-handling" which often includes winches, cranes, deck machinery.
Why the OT200 Is Chosen for These Applications
Understanding the design of the OT200 helps explain why equipment designers opt for it:
High mechanical/volumetric efficiency under load: The OT200 is built with aluminium housing + cast-iron flanges, tight clearances, which support good efficiency and higher pressures than typical low-end gear pumps.
Moderate flows with higher pressures: Its displacement range (4.1 cc/rev to 30 cc/rev for the Group 2 version) and pressure ratings let it serve machines where moderate flow but significant pressure is required-ideal for auxiliary hydraulics, control systems, etc.
Installation flexibility: With multiple mounting/shaft/port variants, the pump can be adapted into different machine architectures-important for OEMs doing mobile machines or retrofits.
Good durability for mobile use: The "designed for heavy working conditions" phrasing implies suitability for demanding environments (shock/vibration/mobile use) rather than just bench-mounted industrial pumps.
Benefits & Design Considerations of the OT200 Gear Pump
Main Benefits
High mechanical and volumetric efficiency
The OT200 series is marketed as offering "very good mechanical and volumetric efficiencies" thanks to its tight clearances, quality materials, and optimised gear design.
Higher efficiencies mean less wasted energy (less internal leakage and less frictional losses), which can translate into lower operating cost and longer life.
Capability for heavy-working conditions
The construction uses an aluminium-alloy gear housing combined with cast-iron flanges and covers. This dual-material design makes it robust enough for "heavy working conditions" and "capable of transmitting high hydraulic powers."
For mobile equipment or harsh environments (vibration, load changes), this robustness is a real advantage.
Relatively high pressure and speed envelope (for a gear pump)
The OT200 supports working pressures in many sizes up to ~250 bar and peak pressures around ~300 bar.
Speed capability (for the smaller sizes) can reach ~4,000 rpm.
These ranges enable it to serve moderately demanding hydraulic tasks, rather than only low-pressure auxiliary circuits.
Flexibility in installation and configuration
The product line offers a wide range of shaft types, ports, mounting flanges, and displacement sizes.
This flexibility helps machine-designers integrate the pump with different drive shafts, flange standards (SAE, European), and porting arrangements, facilitating retrofits or variant machines.
Noise and life considerations
The OT200 series includes "Low noise version available" in its catalogue.
Reducing noise is important in many mobile machines (for operator comfort) and industrial environments (for regulatory/occupational reasons).
Design & Application Considerations
While the OT200 offers many advantages, choosing and applying it correctly means addressing certain design points and limitations:
Fixed-displacement nature
The OT200 is a fixed-displacement pump: each revolution moves a fixed volume of fluid. If your machine requires variable flow (for example variable-speed driven hydraulics or variable function flow), you will need external flow control valves or a different pump type.
This means the system designer must ensure the fixed flow is acceptable or that flow regulation is handled elsewhere.
Matching speed and pressure limits
For each displacement size in the OT200 family, there are specific maximum working pressures, peak pressures, and maximum speeds. For example, the largest displacement in the Group 2 (30 cc/rev) max speed is only ~2,000 rpm.
Exceeding these limits risks premature wear, higher leakage, noise, or mechanical failure. So system rpm and pressure conditions must be carefully aligned with the pump size.
Fluid condition / viscosity / contamination
Gear pumps are sensitive to fluid cleanliness and viscosity. Internal clearances are tight in a high-performance design like the OT200, so particle contamination, improper viscosity, or air entrainment can degrade performance (increase leakage, reduce efficiency, shorten life).
The manufacturer catalogue emphasises "designed for heavy working conditions" but implicitly good maintenance conditions are required.
Installation and alignment
Even with a flexible mounting design, proper installation is key: correct shaft alignment, secure mounting flange, correct torqueing of bolts, proper porting and suction conditions (adequate inlet line, minimal cavitation risk) all impact pump longevity.
If installation is poor (misalignment, cavitation, suction starvation), even a robust pump like the OT200 can fail prematurely.
Conclusion
In this article, we've explored the anatomy and significance of the Dana Brevini OT200 gear pump: from what it actually is-its design, construction, specification range-to how it operates and the types of machinery it is commonly found in. We've seen how, through a combination of aluminium-housing construction, cast-iron flanges, tight clearances and selectable mounting/shaft/port options, this fixed-displacement external gear pump provides a reliable solution for moderate-to-high-pressure hydraulic circuits.
When properly matched to system requirements-flow, speed, pressure-and installed with attention to fluid condition, alignment and cooling, the OT200 series offers ：
- high volumetric/mechanical efficiency
- robustness for heavy-duty or mobile hydraulics
- installation flexibility.
Equally, it's important to recognize the limitations of fixed displacement (i.e., no internal variable flow), and the need for good fluid quality, correct mounting and adherence to speed/pressure limits.
If you are specifying or replacing a hydraulic pump and considering the OT200 series, you may also want to explore trusted suppliers who offer wide product ranges and support for customization. One such supplier is POOCCA Hydraulic (Shenzhen) Co., Ltd., which offers compelling advantages:
- A one-stop hydraulic solution provider offering gear pumps, piston pumps, vane pumps, motors, valves and accessories.
- Strong production capacity and product range - for example, we gear pump page lists more than 2,000 models suitable for construction, agriculture, mining, and more.
- Customization options: able to tailor the pump configuration (shaft, flange, porting, logo, etc) to machine/application needs.
- Proven quality & delivery: ISO9001 certified, large facility, stock availability and short delivery times for many models.
If you decide to move forward, contacting POOCCA for your gear-pump needs (including potentially the OT200 series or equivalent) may provide you with a reliable partner for supply, customization and support.
Five FAQs
- What is the displacement range of the OT200 gear pump?
The OT200 series (Group 2) offers displacements from approximately 4.10 cc/rev up to about 30.00 cc/rev.
- What maximum pressure and speed can the OT200 handle?
Many models in the series handle continuous working pressures up to ~250 bar, with peak pressures up to ~300 bar, and maximum speeds in smaller sizes up to ~4,000 rpm.
- What type of hydraulic systems use the OT200 pump?
It is used in open-loop hydraulic circuits in mobile/off-road equipment (e.g., excavators, loaders, agricultural machinery) and industrial systems (power units, presses) due to its balance of flow and pressure capability.
- What are key design features that distinguish the OT200?
Features include an aluminium-alloy gear housing with cast-iron flanges/cover, tight internal clearances for good volumetric/mechanical efficiency, multiple shaft/flange/port configuration options, and suitability for heavy working conditions.
- What should be considered when specifying the OT200 for a machine?
Important choices include ensuring the pump's displacement matches required flow (flow = displacement×rpm), verifying the pump's pressure/speed rating exceeds machine requirements, checking mounting/shaft/port compatibility, ensuring proper hydraulic fluid cleanliness/viscosity, and acknowledging that the pump is fixed‐displacement (so variable flow must be managed externally).
