A4FO71/10L-PZB25K33 A4FO71/10L-PZB25N00
2 month ago
Product details
The A4FO71/10L-PZB25K33 is a piston pump model produced by Rexroth, a German company. Below is a detailed analysis of its specific content:
I. Basic Information
• Model: A4FO71/10L-PZB25K33
• Brand: Rexroth
• Type: Piston Pump
II. Technical Features
• Piston Pump Principle: The pump oil task is completed through the reciprocating motion of the piston. The total stroke L of the piston's reciprocating motion is constant and determined by the cam's lift. The amount of oil supplied per piston cycle depends on the oil supply stroke, which is variable and not controlled by the camshaft. The start of oil supply does not change with the variation in the oil supply stroke. Rotating the piston can change the end moment of oil supply, thereby altering the amount of oil supplied.
• Operating Mode: The piston pump on the principle of a single piston. There are two one-way valves on a piston pump, facing opposite directions. When the piston moves in one direction, a negative pressure occurs in the cylinder, causing one one-way valve to open and liquid to be drawn into the cylinder. When the piston moves in the opposite direction, the liquid is compressed, causing the other one-way valve to open and the liquid drawn into the cylinder to be discharged. Continuous movement of this process results in continuous oil supply.
III. Installation and Maintenance
• Installation Precautions:
• The minimum suction pressure at oil port S must not fall below 0.8 bar.
• When installed above the oil tank, the installation position where the shaft is horizontal and the suction port faces downwards is not allowed.
• If the pump's installation position is higher than the oil tank level, ensure that the minimum immersion depth of the suction line meets the specified requirements (e.g., 200 mm) to guarantee normal oil suction by the pump.
• Maintenance Checks:
• Check the piston for scratches and corrosion. Replace it if necessary.
• Inspect the fit of the piston pair to ensure the piston can slowly slide down under its own weight.
• Check the seal of the piston pair to ensure good sealing.
• Inspect the relief ring zone of the oil outlet valve pair for wear, steps, or scratches. Replace it if necessary.
• Check the fit of the oil outlet valve pair to ensure good sealing.
• Inspect other related components, such as the tappet body and control sleeve, to ensure their clearances and fits are within specified ranges.
IV. Application Fields
Due to its efficient and stable performance, the A4FO71/10L-PZB25K33 piston pump is widely used in various hydraulic systems, such as engineering machinery, metallurgical equipment, shipbuilding, and other fields.
In summary, the A4FO71/10L-PZB25K33 is an advanced and stable piston pump model, with detailed information and parameters providing important references for users' purchasing and usage decisions.
the A4FO71/10L-PZB25K33 is a specific model of the Rexroth A4FO series swashplate axial piston displacement pump. Here is the comprehensive information about this model:
1.Product Overview
• Series and Structure: The A4FO series is a swashplate axial piston displacement pump used in open-circuit hydrostatic transmissions, featuring a flow rate proportional to the driving speed and displacement.
• Application Fields: It is widely used in industrial hydraulic systems, such as engineering machinery, metallurgical equipment, etc., requiring hydraulic oil, compatible with mineral oil, environmentally friendly hydraulic oil, and fire-resistant hydraulic oil (HF).
2.Technical Specifications
• Pressure Range:
• Inlet Pressure: The inlet pressure range for specifications 71-500 is 0.8 bar (minimum) to 30 bar (maximum).
• Outlet Pressure: The nominal pressure is 350 bar, with a peak pressure up to 400 bar.
• Operating Viscosity:
• Recommended operating viscosity range: 10–1000 mm²/s (specifications 71-500).
• The lower limit for cold start temperature is -25°C, and the short-term allowable maximum leakage oil temperature is 90°C.
• Filtration Requirements: The cleanliness of the hydraulic oil should meet at least ISO/DIS 4406 class 18/15, and class 17/14 is required at high temperatures (above 90°C).
3.Model Breakdown
• Model Composition: In A4FO71/10L-PZB25K33:
• 71: Displacement specification (71 cm³/rev).
• 10L: Potentially related to control method or installation orientation.
• PZB: Indicates the pump's configuration or additional functions (such as through-shaft drive, pressure compensation, etc.).
• 25K33: Specific design code or version identifier.
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