BLB flow dividers and regulators – how to split oil flow in a hydraulic system

In a hydraulic system, it is often not enough to simply supply oil to two receivers. In real applications, one function usually has to be supplied first, while the second can operate only with the remaining flow. This is exactly where BLB flow dividers and regulators are used.

This is not an optional add-on. It is a functional component that organizes how the hydraulic circuit works. It helps maintain priority for the most important circuit and makes better use of the available oil flow.

The problem: one oil flow, two different tasks

In many hydraulic machines and systems, one pump supplies more than one function. The problem starts when those functions do not have the same priority. One circuit must operate steadily and receive guaranteed flow, while the other can work from the excess flow.

Without proper flow regulation, the system may work unevenly. The priority function may lose stability, operating parameters may fluctuate, and the whole circuit becomes harder to control and predict.

The solution: BLB flow dividers and regulators

BLB flow dividers and regulators are designed to split oil flow into two separate circuits:

• priority circuit,
• excess circuit.

This arrangement allows the system to supply the most important receiver first and then direct the remaining oil flow to the secondary circuit. For the user, this means better control of the hydraulic installation and more predictable machine operation.

This product group includes two main solution types:

• RF series,
• BF series.

How a flow regulator works in practice

The operating principle is straightforward: oil enters the unit and is divided into two working lines. The first line supplies the priority circuit, while the second receives the excess flow. The key point is that the split is controlled rather than random.

This matters especially where one machine function must not lose supply when another section is activated. A properly selected flow regulator improves system stability and reduces problems caused by incorrect oil distribution.

RF series – when pressure control in the priority circuit matters

BLB RF series flow regulators are equipped with a general relief valve that controls pressure in the priority circuit. This is important in systems where, in addition to flow division, circuit protection and pressure stability also matter.

In practice, the RF series is suitable for systems where the priority receiver must operate steadily and without overload risk. Additional pressure control improves safety and helps maintain repeatable operating conditions.

Available RF models:

• RFP40P
• RF40PV
• RF70P
• RF70PV

BF series – when compact installation is required

The BF series is an integrated solution. The flow regulator is built directly into the monoblock valve, making the system more compact and structurally simpler.

This design brings several practical advantages. It reduces the number of connections, simplifies installation, and makes better use of limited mounting space. This is particularly important in machines and systems where every extra component adds complexity.

Available BF models:

• BF401
• BF701

Result for the user

From the point of view of a mechanic, service technician, or design engineer, the final result matters most. BLB flow dividers and regulators help achieve:

• more stable supply to the priority circuit,
• better use of available oil flow,
• a simpler and more predictable hydraulic system,
• greater control over system operation,
• a choice between a classic or integrated solution.

This is not just about having a better technical parameter on paper. In practice, it means smoother system operation, fewer design problems, and greater confidence in real working conditions.

Typical applications of BLB flow dividers and regulators

These products are used wherever one pump or one oil flow has to serve two circuits with different priorities. Typical applications include:

• mobile machinery,
• working systems with priority functions,
• hydraulic valve systems,
• installations requiring controlled flow split,
• systems with limited mounting space.

The correct version depends on the system design, the required function, and installation method.

Summary

BLB flow dividers and regulators are designed for hydraulic systems where oil flow must be controlled and divided between two circuits. The RF series is the right choice where pressure control and protection of the priority circuit are important. The BF series is better where compact design and integration with a monoblock valve are required.

If the system must operate predictably and one function has to be supplied before another, this is not an accessory. It is part of a properly designed hydraulic circuit.