ED72 and ED73 Series Control Valves

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Product details

ED72 and ED73 Series Control Valves

ED72 and ED73 control valvesare core components (used in conjunction with) Rexroth's A10VO/A10VSO series hydraulic pumps, primarily for hydraulic systems in construction machinery (e.g., excavators). They regulate pump displacement, pressure, and flow to meet dynamic power demands under varying operating conditions.

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I. Product Overview

1. Applications

• Core Function: These valves control the output performance of A10VO/A10VSO pumps by adjusting displacement, pressure, and flow via electro-hydraulic proportional control, ensuring optimal power matching for construction equipment.

• Typical Use Cases:

• Excavators (20-ton class and below for ED72; 30-ton class and above for ED73).

• Rotary drilling rigs and other heavy-duty machinery.

2. Key Features

• Displacement Regulation: Stepless adjustment via electro-hydraulic proportional control to adapt to load changes.

• Pressure Control: Integrated pressure cutoff valves prevent system overload, protecting hydraulic components.

• Flow Control: Optimizes system efficiency by coordinating with engine speed to reduce energy consumption.

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II. Technical Specifications

1. ED72 Control Valve

• Structure: Compact design integrating electro-hydraulic proportional valves, pressure cutoff valves, and flow control valves.

• Performance:

• Fast response for high-dynamic applications.

• Compatible with multiple control signals (e.g., PWM, current signals).

• Applications: Small-to-medium construction machinery (e.g., excavators <20 tons).

2. ED73 Control Valve

• Structure: Enhanced version of ED72 with redundant designs and improved sealing.

• Performance:

• Higher pressure resistance (e.g., nominal pressure up to 100 bar).

• Wider operating temperature range (-30°C to +80°C) for harsh environments.

• Applications: Heavy-duty machinery (e.g., excavators ≥30 tons, rotary drilling rigs).

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III. Technical Parameters (Example)

【表格】

Parameter ED72 ED73

Nominal Pressure 100 bar 100 bar (or higher)

Temperature Range -30°C to +80°C -30°C to +80°C

Flow Direction Unidirectional Unidirectional

Media Hydraulic oil Hydraulic oil

Mounting Type Threaded installation Threaded installation

Control Method Electro-hydraulic proportional control Electro-hydraulic proportional control

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IV. Application Cases

1. Excavator Hydraulic Systems

• ED72/ED73 valves paired with A10VO/A10VSO pumps enable dynamic displacement adjustment based on load, improving operational smoothness and fuel efficiency.

• Example: During digging, the valve adjusts pump displacement in real-time according to joystick input.

2. Rotary Drilling Rig Powerheads

• ED73’s high-pressure resistance supports drilling in hard strata, extending equipment lifespan.

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