R900936636 2FRE6B-2X/16QK4MV German Rexroth flow control valve

R900949741 2FRE6B-2X/16QK4RV R900937868 2FRE6B-2X/1LK4MV R900947600 2FRE6B-2X/1LK4RV R900937870 2FRE6B-2X/25QK4MV R900937871 2FRE6B-2X/25QK4RV R900936635 2FRE6B-2X/2LK4MV R900934891 2FRE6B-2X/2LK4RV R900938035 2FRE6B-2X/2QEK4MV R900954501 2FRE6B-2X/2QEK4RV R900933708 2FRE6B-2X/3QK4MV R900937872 2FRE6B-2X/3QK4RV R900937873 2FRE6B-2X/6QK4MV R900949742 2FRE6B-2X/6QK4RV R900937874 2FRE6B-2X/8LK4MV R900934070 2FRE6B-2X/8LK4RV 811403013 2FREX10B-1X/70L1G24-25N9Z4MM 811403123 2FREX6B-1X/15L1G24-25N9Z4MM 811403119 2FREX6B-1X/35L1G24-25N9Z4MM-254 811403118 2FREX6B-1X/7,5L1G24-25N9Z4MM-254 R900424887 2FRM10-3X/10L R900423250 2FRM10-3X/10LB R900427774 2FRM10-3X/10LV R900423251 2FRM10-3X/16L R900423252 2FRM10-3X/16LB R900423253 2FRM10-3X/16LV

FAQ:

Q1: What is the main purpose of this 2FRE valve?

A:​ This is a high-performance, electrically controlled flow control valve. Its primary function is to provide precise speed control for hydraulic actuators (cylinders or motors). The key feature is that its flow setting remains constant even if the system pressure changes, ensuring consistent actuator speed regardless of the load.

Q2: How is this 2FRE valve different from a standard throttle or Z2FS valve?

A:​ The critical difference is pressure compensation. A standard throttle valve's flow changes with pressure fluctuations. The 2FRE valve has an internal pressure compensator that automatically adjusts to maintain a constant flow rate for a given electrical signal, providing much more accurate and repeatable speed control. It also allows for electronic, on-the-fly adjustment​ via a control signal.

Q3: What do the codes "B" and "16Q" in the model number mean?

A:

• B:​ Specifies the type of pressure compensator. Version "B" is a standard compensator without an external pilot control function for closing.

• 16Q:​ 16​ is the rated flow​ in liters per minute (16 L/min). Q​ indicates a progressive flow characteristic, meaning the flow increases progressively with the control signal, allowing for finer resolution at lower flow rates.

Q4: The designation includes "MV". What does the "M" signify?

A:​ The suffix "M"​ indicates that the valve does NOT have an integrated check valve. Therefore, it regulates flow in only one direction​ (from port A to B, as per the flow direction arrow on the valve). Flow in the reverse direction is blocked. A version with a "V" instead of "M" would include a free-flow check valve for the reverse direction.

Q5: What components are needed to operate this valve?

A:​ Unlike valves with onboard electronics (OBE), this valve requires an external proportional amplifier. You need:

1. A compatible amplifier card (e.g., Rexroth VT-VRPD-1-1X).

2. A command signal (e.g., 0-10V, 4-20mA) from a PLC or controller.

3. A 24V DC power supply for the amplifier.

   The valve's integrated inductive position transducer provides closed-loop feedback to the amplifier for precise spool positioning.