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Selecting the right hydraulic pump is crucial for the efficiency and effectiveness of a hydraulic system. One of the critical factors to consider when choosing a hydraulic pump is the type of fluid that will be used in the system. Different fluids have varying properties, which can influence the performance, longevity, and safety of the hydraulic system. Here’s a guide on how to select a hydraulic pump based on fluid type.
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First, it’s important to identify the type of fluid you will be using. Common hydraulic fluids include mineral oil-based fluids, water-based fluids, and biodegradable fluids. Each of these has distinct properties that must be matched with the appropriate pump design.
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For systems that utilize mineral oil-based fluids, gear pumps and piston pumps are often ideal. These pumps are designed to handle the viscosity and lubrication characteristics of mineral oils. Be sure to check the viscosity index and operating temperature range of the fluid, as these can significantly impact pump performance. Using a pump that is not suitable for the fluid’s viscosity can lead to system inefficiencies or even mechanical failure.
Water-based fluids, including water-glycol and water-oil emulsions, require different considerations. Generally, vane pumps and gear pumps are suitable for these types of fluids, but one must ensure that the pump materials can withstand potential corrosion. It is also essential to evaluate the fluid’s fire-resistance properties, as certain applications may necessitate pumps designed to handle flammable fluids safely.

