German WACHENHAUSEN valves WACHENHAUSEN models WACHENHAUSEN prices

WACHENHAUSEN valves, also known as speed synchronization valves, are a collective term for flow divider valves, flow combiner valves, one-way flow divider valves, one-way flow combiner valves, and proportional flow divider valves within hydraulic valves. Synchronization valves are mainly applied in hydraulic systems with synchronous control of dual-cylinder and multi-cylinder setups. There are many methods to achieve synchronous motion, but hydraulic systems using flow divider-combiner valves (synchronization valves) offer advantages such as simple structure, low cost, ease of manufacturing, and high reliability; therefore, synchronization valves are widely used in hydraulic systems. The synchronization provided by flow divider-combiner valves is speed synchronization. When two or more hydraulic cylinders bear different loads respectively, the flow divider-combiner valve can still ensure their synchronous motion.

WACHENHAUSEN valve functions

The function of a flow divider valve is to supply the same flow rate (equal flow division) from the same oil source to two or more actuators in a hydraulic system, or to supply flow to two actuators at a certain ratio (proportional flow division), thereby maintaining synchronous speed or a fixed ratio between the two actuators. [1] The function of a flow combiner valve is to collect equal return flow rates or proportional return flow rates from two actuators, thereby achieving speed synchronization or a fixed ratio between them. A flow divider-combiner valve combines the functions of both a flow divider valve and a flow combiner valve.

WACHENHAUSEN valve classification

Classified by adjustment method: fixed flow divider-combiner valves, self-adjusting flow divider-combiner valves, adjustable flow divider-combiner valves, and combined self-adjusting and adjustable flow divider-combiner valves. The above series of hydraulic valves can be designed as low-flow flow divider-combiner valves. Among these, fixed-structure synchronization valves can be further divided into two structures: reversing piston type and hook-head type. This series of hydraulic valves can also be classified by flow distribution method into: equal-flow divider valves and proportional-flow divider valves, with the commonly adopted ratio being 2:1. They can also be designed as low-flow synchronization valves according to the required ratio.

Difference between WACHENHAUSEN valve flow combiner valves and flow divider valves

1) The flow combiner valve is installed on the return oil lines of two actuators, combining the return oil flows from the two load paths; 2) The two flow sensors of the flow divider valve share the inlet pressure; the greater the flow through the flow sensor, the lower its outlet pressure. The two flow sensors of the flow combiner valve share the outlet; the greater the flow through the flow sensor, the higher its inlet pressure. Therefore, the pressure feedback direction of the flow combiner valve is exactly opposite to that of the flow divider valve; 3) The flow combiner valve can only ensure synchronization during the return stroke of the actuators.

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