German Clark KRACHT hydraulic pilot control module

German Clark KRACHT hydraulic pilot control module

The hydraulic pilot control module of the German KRACHT brand (such as pilot relief valve, pressure limiting valve) is the core component used for pressure control, safety protection, and voltage stabilization in hydraulic systems.

1、 Core Definition and Structure

Definition: A two-stage hydraulic pressure control valve with a pilot valve as the control stage and a main valve as the execution stage, which controls a large flow main valve through a small flow pilot valve to achieve high-precision and large flow pressure regulation.

Typical structure (taking DV/SPVF/HVFE series as an example):

Pilot stage: pilot piston, pilot tan spring, adjusting screw, exhaust screw.

Main stage: main piston, main spring, valve body, inlet P, return T, measuring port M, remote control port X.

2、 Working principle (taking overflow/pressure limiting as an example)

Normal pressure maintenance: When the system pressure is lower than the set value, the pilot valve closes, and the main piston closes the valve port under the action of spring force, and the system supplies oil normally.

Overpressure opening: When the pressure exceeds the set value, hydraulic force pushes open the pilot piston, and the upper chamber of the main piston is depressurized.

Overflow pressure relief: The main piston moves under the action of the upper and lower pressure difference, the main valve port opens, and high-pressure oil overflows back into the oil tank, causing the system pressure to fall back.

Reset and maintain pressure: When the pressure drops below the set value, the pilot valve closes, the main piston resets, and the valve port closes again.

3、 Core Model and Parameters (KRACHT)

German Clark KRACHT hydraulic pilot control module

4、 Main functions and advantages

Core functions: pressure limiting, stabilizing, overflow, unloading, remote control, segmented pressure regulation.

Technical advantages:

High precision voltage stabilization: Small pressure fluctuations and high control accuracy.

High flow adaptation: The main valve has strong flow capacity and is suitable for high flow systems.

Modular design: Flexible function expansion, can integrate solenoid valves and proportional control.

High reliability: optional redundant safety devices, supporting classification society certification.

5、 Typical application scenarios

Industrial hydraulic equipment (machine tools, injection molding machines, presses).

Construction machinery (excavators, cranes, forklifts).

Wind power generation, petrochemical industry, marine hydraulic system.

Pressure safety protection of lubrication system.

6、 The difference between "Clarke transformation" and

KRACHT pilot module: hydraulic component used for pressure control.

ClarkeTransformation module：Power Electronics/Motor control algorithm module, used for three-phaseTwo phase coordinate transformation（FOCVector control).