Product Overview

The Rexroth MK 15 G1X/V (Material Number: R900423326) is a high-precision throttle check valve designed for demanding industrial hydraulic systems. As a member of the Rexroth MK series, this component functions as a modular flow control valve, providing precise metering of fluid flow in one direction while allowing free reverse flow. The “G1X” designation indicates a size 15 (NG15) modular interface with a series 1X design, and the “V” suffix denotes a Viton (FKM) seal compound for enhanced compatibility with high-temperature and aggressive hydraulic fluids. This valve is engineered to be mounted directly onto standard ISO 4401 / DIN 24340 size 15 subplates or sandwich plates, making it an ideal solution for compact, manifold-based hydraulic power units. Its primary role is to regulate actuator speed by controlling the flow rate of hydraulic oil, ensuring smooth, repeatable motion in industrial machinery.

Technical Specifications

Engineering Features & Advantages

• Precision Performance: The throttle check valve features a sharp-edged metering orifice that provides linear and repeatable flow adjustment, ensuring accurate speed control of hydraulic actuators. The integrated check valve allows unrestricted reverse flow, minimizing pressure drop during return strokes.
• Industrial Reliability: Built for continuous operation under severe industrial conditions, the valve body is manufactured from high-strength cast iron or steel, and the internal components are hardened and ground for long service life. The Viton seals ensure reliable operation at elevated temperatures and with fire-resistant hydraulic fluids.
• Direct Fit Replacement: Exact dimensional and functional compatibility with original OEM standards, allowing drop-in replacement on Rexroth modular systems and other compatible manifolds without modification.
• Modular Design: The sandwich plate construction enables space-saving integration into existing hydraulic power units and simplifies system assembly, reducing piping and potential leak points.

Typical Industrial Applications

This throttle check valve is widely used in heavy industrial scenarios requiring precise flow control and reliable reverse flow, including: plastic injection molding machines (for injection and clamping speed control), metallurgical presses (for controlled descent and return of rams), machine tool hydraulic systems (for feed rate regulation), and construction & marine hydraulics (for winch and cylinder speed management). Its robust design also makes it suitable for test rigs and special-purpose hydraulic power units where accurate flow metering is critical.

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