Univer One-Way Flow Control Valve for Precise Pneumatic Speed Control

Description

The Univer RFU-446-SO is a high-quality one-way flow control valve, also known as a throttle check valve. It is designed for in-line installation to precisely regulate the speed of pneumatic cylinders and other actuators. By adjusting the knurled screw, you can accurately control the flow rate of compressed air in one direction, while allowing free flow in the reverse direction. This component is essential for optimizing machine cycles and ensuring smooth, controlled motion in automated systems. This specific item is an OEM part originally specified for Haver & Boecker machinery, ensuring it meets high industrial standards.

Specifications

• Manufacturer: Univer
• Type: RFU-446-SO
• Haver & Boecker Material No.: 200340647
• Function: One-way flow control (throttle check)
• Pneumatic Connection: G1/8 inch
• Adjustment: Knurled spindle with lock nut
• Operating Pressure: 1 to 10 bar
• Operating Temperature: -20 deg C to +80 deg C
• Mounting Style: In-line

Label Info

• Brand: HAVER & BOECKER (Original Equipment Manufacturer)
• Description: one-way restrictor, RFU-446-SO spindle c
• H&B Order No.: 10188280
• H&B Material No.: 200340647

Application

This valve is widely used in industrial automation for controlling the extension or retraction speed of pneumatic cylinders. It is suitable for applications in packaging machinery, assembly lines, material handling equipment, and general pneumatic circuits where precise motion control is required.

Country of Origin

Manufactured by Univer in Italy.

CO2 Impact

By purchasing this pre-owned but unused component, you are contributing to the circular economy and helping to save approximately 1.0 kg of CO2. This saving is equivalent to the emissions from driving a standard car for 5 kilometers.

Availability

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

FAQ

This valve, also known as a throttle check valve, controls the speed of a pneumatic cylinder or motor. It restricts air flow in one direction (controlled flow) to slow down the movement and allows free flow in the opposite direction for a fast return stroke.

For meter-out control, which is the most common and stable method, you should install the RFU-446-SO on the exhaust port of the cylinder. This means the controlled flow path (from port 2 to 1 according to the symbol) should restrict the air leaving the cylinder, ensuring smooth operation.

The "SO" suffix typically indicates a "Sonderausfuehrung" or special version made for a specific Original Equipment Manufacturer (OEM), in this case, Haver & Boecker. While the core function is the same as a standard RFU-446, it might have minor modifications like a specific seal material or a pre-set adjustment range.

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Last Update: Friday, March 13, 2026