Rexroth NG40 Logic Cover with Pilot Operated Check Valve

Description

This is a high-quality hydraulic logic cover, model LFA 40 H2-71/F, from Bosch Rexroth. It is designed as a cover with a built-in, pilot-operated check valve function (pilot to open) and features a pre-opening mechanism for smooth operation and prevention of hydraulic shock. With its robust construction and nominal size of NG40, it is suitable for high-pressure industrial hydraulic applications requiring precise and reliable flow control.

Specifications

• Manufacturer: Rexroth
• Type: Logic Cover (Pilot Operated Check Valve, Pilot to Open)
• Model: LFA 40 H2-71/F
• Nominal Size: 40
• Maximum Operating Pressure: 630 bar
• Hydraulic Fluid Compatibility: Mineral oils (HL, HLP) per DIN 51524

Label Info

• MNR (Material Number): R900938122
• FD (Production Date Code): 41715
• Serial: 124071150

Application

This component is used in industrial hydraulic circuits, typically within manifold blocks, to control the direction of hydraulic fluid flow. It is commonly found in heavy machinery, manufacturing presses, and automated production lines where reliable, high-pressure performance is critical.

Country of Origin

Made in Germany.

CO2 Impact

By purchasing this pre-owned component, you help avoid the emission of approximately 30 kg of CO2, which is equivalent to the savings from not producing a new steel-based product of this scale.

Availability

This item is in stock and ready for immediate dispatch. Order now from PLC2Day for expert support and fast delivery.

FAQ

What is the function of the 'pre-opening' feature in this LFA 40 H2-71/F logic cover?
The pre-opening feature provides a dampened or smooth opening of the main valve poppet. This prevents hydraulic shock (pressure spikes) in the system when the valve opens, which is crucial for protecting sensitive components and ensuring smooth machine operation.

What type of hydraulic fluid is compatible with this component?
This logic cover is designed for use with mineral oil (HL, HLP) according to DIN 51524, and it may also be compatible with other fluids upon request from the manufacturer. Always check the system requirements and the component's data sheet for fluid compatibility to prevent seal damage and ensure optimal performance.

What are the torque specifications for mounting this NG40 logic cover?
For an NG40 component, the mounting bolts require a specific torque to ensure a proper seal and prevent distortion of the valve body. While you should always consult the official Rexroth installation manual, a typical torque value for this size is in the range of 500-600 Nm, depending on the bolt grade used (e.g., class 10.9). Using a calibrated torque wrench is essential for correct installation.

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Laatst bijgewerkt: March 13, 2026