German KRACHT Clark Pilot Control Pressure Valve DV Series

German KRACHT Clark Pilot Control Pressure Valve DV Series

The KRACHT DV series pilot controlled pressure valve from Germany is a modular pilot operated seat valve designed for high flow hydraulic/lubrication systems. It features pressure limiting, stabilizing, overflow, and remote control, and can be directly interchanged with the SPV (F)/HV (F) series for installation dimensions.

1、 Core classification and model

DV B: Standard pilot operated relief valve (basic type), optional with 2/2 directional valve for non pressure circulation;

DV S: Segmented pressure control valve (dual pilot valve+2/2 solenoid valve), achieving high and low pressure two-stage switching;

DV R: Remote control pressure valve (external hydraulic trigger), suitable for centralized pressure management;

DV... Y: Control the different configurations of internal/external oil discharge (Y port);
Example model: DVS50F2F1YA-NC24D (DN50, dual pilot, external discharge, 24V normally closed solenoid valve).

2、 Structure and Working Principle

Structural composition: main valve (main piston+main spring+valve body)+1-2 pilot valves (pilot cone valve+adjusting spring+adjusting screw); Standard measuring port M, remote control port X, and oil discharge port Y; P=inlet oil, T=return oil.

workflow

Normal: When the system pressure is below the set value, the pilot valve is closed and the main valve is tightly closed under the force of the spring;

Overpressure: When the pressure opens the pilot valve, the upper chamber of the main valve is depressurized, and the main piston moves upward under the pressure difference, the main valve port opens, and high-pressure oil overflows back to T;

Reset: When the pressure drops back to the set value, the pilot valve resets and the main piston closes under the force of the spring.

Optional: External control oil (X port) can achieve remote pressure regulation/unloading; DV S can switch between high and low pressure sections through solenoid valves.

3、 Key technical parameters

German KRACHT Clark Pilot Control Pressure Valve DV Series

4、 Core advantages

High precision for large flow: suitable for ultra large flow systems with minimal pressure fluctuations;

Strong modularity: By replacing the pilot, overflow, segmentation, and remote control can be achieved without the need to replace the main valve;

High reliability: optional redundant pressure limitation, shock and vibration resistance, long lifespan;

Good interchangeability: Consistent size with SPV (F)/HV (F) valves of the same brand, low cost of renovation and upgrading;

Marine adaptation: Supports classification society certification and can be used for ship hydraulic and lubrication systems.

5、 Typical application scenarios

Large industrial hydraulics: injection molding machines, large press machines, metallurgical equipment, wind power hydraulic stations;

Ship and Ocean Engineering: Main engine lubrication system, servo hydraulic system, lifting hydraulic system;

Construction machinery: high-pressure and high flow circuits for large excavators and crawler cranes;

Petrochemical industry: pressure protection for pump stations and compressor lubrication systems.

6、 Selection and maintenance points

Selection: Select the diameter according to the maximum pressure and peak flow rate of the system; Select DV B/S/R according to functional requirements; Determine the Y port oil discharge method, whether an electromagnetic valve is required, and whether certification from the classification society is required;

Installation: Reliable flange sealing; M-port can be connected to a pressure gauge; Pay attention to leaks when configuring control pipelines for X port;

maintainRegularly check the locking of adjustment screws and seals; Clean the pilot valve filter screen (to prevent jamming); To avoid abnormal valve response caused by oil contamination.