HAVER & BOECKER RFU-446-S0 Spindel

Eisele Pneumatic One-Way Flow Control Valve RFU-446-SO

Description

This is a one-way flow control valve, model RFU-446-SO, manufactured by Eisele as a special version. It is designed for precise control over the speed of pneumatic actuators, such as cylinders. The valve provides adjustable flow restriction in one direction and allows free, unrestricted flow in the return direction. Its robust construction and fine-adjustment spindle make it a reliable component for various pneumatic applications. This is a new old stock item, ensuring excellent performance.

Specifications

• Manufacturer: Eisele
• Type: One-Way Flow Control Valve / Throttle Check Valve
• Model: RFU-446-SO Spindel
• Function: Flow control in one direction, free flow in reverse
• Adjustment: Knurled knob with lock nut
• Body Material: Aluminium

Label Info

This component was sourced from the inventory of Haver & Boecker, with the following details on the original packaging label:

• Material: 200340647
• Description: one-way restrictor, RFU-446-SO Spindel
• Date: 05.04.2017

Application

Ideal for controlling the extension or retraction speed of single-acting or double-acting pneumatic cylinders. Commonly used in industrial automation, material handling, and machine building to ensure smooth and controlled motion sequences.

Country of Origin

Germany

CO2 Impact

By purchasing this component, you are contributing to a more sustainable future. Reusing this part avoids the production of a new one, saving an estimated 1.2 kg of CO2. This saving is equivalent to the emissions from driving a standard car for 6 km.

Availability

This item is in stock and ready for immediate dispatch. Order now from spareparts2day for expert support and fast delivery.

FAQ

What is the function of a one-way flow control valve?
It controls the flow rate of compressed air in one direction using an adjustable needle valve (throttling), while allowing free flow in the opposite direction through a built-in check valve. This is typically used to control the speed of a pneumatic cylinder’s piston.

How do I identify the controlled flow direction?
A symbol is engraved on the valve body. It shows a throttle symbol and a bypass check valve symbol. The direction that must pass through the throttle symbol is the controlled (restricted) flow direction, typically from port 1 to port 2 on this model.

The part number RFU-446-SO is not in the standard catalog. What does this mean?
The ‘-SO’ suffix in German part numbers often stands for ‘Sonderausfuehrung’, which means ‘Special Version’. This valve was likely manufactured by Eisele specifically for a large customer like Haver & Boecker, potentially with minor modifications to threads, seals, or adjustment range.

Friday, March 13, 2026

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