# 4/3-ways control valve

The regulating valve transforms an analog electrical input signal into corresponding opening cross-sections at the outputs. The setpoint signal must be within the range -10 V to +10 V. At 0 V the hydraulic mid-position is adopted and the valve stops the flow (in relation to the null overlap).

The cross section area of the flow opening widens with increasing slide distance. How far the area, and with it the flow at the valve, changes depends on the shape and form of the control notches. A triangular shaped notch results in a progressive flow behavior, a rectangular shaped notch in a linear flow behavior.

The hydraulic resistance relates to a completely opened leading edge and the internal leakage relates to one leading edge as appropriate. The overlap of the leading edges can be specified relative to the maximal slide distance.

By the use of an integrated electronic position controller for the slide distance, beneficial static and dynamic characteristics are achieved that are manifested in a minimal hysteresis (less than 0,2 %) and a response time of less than 12 ms at a signal change of 0 - 100.

Adjustable parameters

Designation | Range | Default value |
---|---|---|

Control notch shape | Rectangular, Triangular | Rectangular |

Relative spool overlap | -50 ... 50 % | 0 |

Hydraulic resistance | 1e-6 ... 1000 bar.min2/l2 | 1.4 |

Leakage | 0 ... 10 l/(min.bar) | 0.00026 |