A comprehensive guide to hydraulic pumps, gear pumps and multiway valves: How to choose the best hydraulic equipment?

1. Gear pump
   Gear pump is a kind of hydraulic pump, often used in low and medium pressure hydraulic system. There are two main types:

External gear pump: composed of two meshing gears, reliable work, simple structure, suitable for transporting clean liquid. Its application fields are wide, including agricultural machinery, construction equipment, chemical industry and so on.

Internal gear pump: high meshing efficiency, low noise, suitable for medium pressure hydraulic systems, such as injection molding machines and small hydraulic stations.

Key factors in choosing gear pumps:

Pressure requirements: gear pump suitable for low and medium pressure systems, usually applicable pressure range of 10MPa-25MPa.
Flow demand: The flow rate of the gear pump is relatively stable, and the appropriate model can be selected according to the flow requirements of the system.
Noise control: If low noise operation is required, an internal gear pump may be a better choice.

2. Multiple valves
   A multiway valve (also known as a control valve bank) is a control element in a hydraulic system that controls the direction, pressure and flow of the hydraulic oil flow. Multiway valves are widely used in construction machinery, agricultural machinery and industrial equipment.

Main functions of multiway valve:

Reversing control: Controls the flow of hydraulic oil and determines the direction of movement of the actuator (such as the hydraulic cylinder).
Flow regulation: Control the flow of hydraulic oil to adjust the speed of movement of the actuator.
Pressure regulation: Maintain the pressure balance of the hydraulic system to prevent overload and damage.
Factors to consider when choosing a multiway valve:

Pressure and flow of the hydraulic system: The pressure and flow rating of the multiway valve must match the hydraulic system.
Number of actuator components: The number of multiway valve outlets should be selected according to the number of hydraulic cylinders or motors.
Operation mode: Manual, hydraulic, electronic, or proportional control mode can be selected according to the automation requirements of the application scenario.

3. Key steps for selecting the best hydraulic equipment
   Clear application scenarios: Different equipment is suitable for different working environments and requirements, understand the specific application of the equipment you use (such as industrial equipment, construction machinery, agricultural equipment, etc.).

Determine system requirements:

Pressure requirements: Select the appropriate hydraulic pump and multiway valve according to the working pressure of the system.
Flow requirements: The flow of the hydraulic system determines the choice of hydraulic pump, too small or too large flow will affect the efficiency of the system.
Accuracy and control requirements: If the system has high requirements for flow, pressure, or reversing control accuracy, choose a higher-end device such as a proportional multiway valve or plunger pump.
Durability and reliability: Durability and reliability are particularly important for equipment that requires long periods of high load operation. Plunger pumps are generally more durable than gear pumps, but gear pumps are reliable enough and more cost-effective in some applications.

Budget versus value for money: Budget is often a key factor when choosing equipment. High-end equipment, such as plunger pumps and high-precision multiway valves, are typically more expensive but offer increased performance and longevity. For general applications, gear pumps and standard multiway valves may be more cost-effective.

Sum up
The hydraulic pump is the core of the hydraulic system, and the pressure, flow rate and efficiency need to be considered when selecting.
Gear pump is a cost-effective hydraulic pump, suitable for low and medium pressure systems.
The multi-way valve controls the fluid flow in the hydraulic system, and the selection should be based on the specific control requirements and operation mode of the system.