- BRAND: NABCO
- MPN: EGCS-422M-C
- DIRECTIONAL CONTROL VALVE
- REXROTH 571 100 000
- MADE IN USA
The NABCO EGCS-422M-C is a high-performance, solenoid-operated directional control valve designed for demanding mobile and industrial hydraulic applications. It is part of a product line with a rich history, originally manufactured by NABCO (a renowned Japanese hydraulics company), and later associated with WABCO and REXROTH through various global partnerships and acquisitions. This valve is known for its reliability, compact design, and high flow capacity.
The part numbers you provided (571 100 000, 73794029-0) are critical cross-references used for ordering and identifying exact replacements.
Detailed Product Description
1. Primary Function
This valve is used to start, stop, and change the direction of hydraulic fluid flow in a system. It typically directs fluid to various actuators (like hydraulic cylinders or motors) to control the movement of machinery.
2. Key Specifications
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Model: EGCS-422M-C
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Manufacturer Branding: NABCO, WABCO, REXROTH
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Type: Solenoid-operated, Spool-type Directional Control Valve
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Section Size: A standard “D03” / NG6 (Nominal Size 06) interface. This is a compact, industry-standard footprint.
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Actuation: Electrical solenoids (single or double, depending on configuration).
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Spool Type: The “-C” suffix often indicates a specific spool configuration (e.g., closed center, tandem center, float center, etc.). The exact spool function must be verified for the specific application.
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Operating Pressure: Typically rated for high pressures, commonly up to 350 bar (approx. 5,000 PSI).
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Flow Capacity: Designed for high flow, often in the range of 60-80 L/min (approx. 16-21 GPM), depending on the spool and system conditions.
3. Common Applications
This valve is commonly found in:
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Construction Machinery: Excavators, wheel loaders, cranes.
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Agricultural Equipment: Tractors, combines.
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Material Handling: Forklifts, forestry equipment.
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Industrial Machinery: Presses, plastic injection molding machines.
4. Design and Features
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Sandwich Plate Design: It is designed to be mounted in a stack (stack valve configuration) between a base manifold and other valves or an end plate. This allows for creating custom hydraulic circuits in a compact space.
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Solenoid Operators: Features powerful wet-pin AC or DC solenoids. “Wet-pin” means the solenoid plunger operates in hydraulic fluid, which cools and lubricates it, leading to longer life and higher reliability.
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Manual Override: Most models include a manual override feature, allowing an operator to mechanically shift the spool in case of electrical failure or for maintenance purposes.
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Robust Construction: Built with high-quality materials to withstand harsh environments, vibration, and contamination.
Explanation of Part Numbers & Cross-References
The part numbers you listed are crucial for identifying the exact same valve across different manufacturer catalogs and global markets.
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NABCO EGCS-422M-C: This is the core manufacturer’s model number. It defines the valve’s physical and performance characteristics.
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73794029-0: This is very likely NABCO’s internal manufacturer part number or a specific assembly number for that exact configuration.
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571 100 000: This is a classic Rexroth part number. When Rexroth distributed or manufactured this valve line, they assigned this number. It is a direct cross-reference.
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WABCO: WABCO has historical ties to commercial vehicle controls and had partnerships or joint ventures that included this type of hydraulic valve. A valve with this part number may have been sold under the WABCO brand for specific markets (e.g., truck-mounted cranes).
