German Clark KARCHT pressure limiting valve HV25A1G1A40

German Clark KARCHT pressure limiting valve HV25A1G1A40

KRACHT Clark HV 25A1G1A40 is a German KRACHT (Clark) HV series pilot operated sliding piston pressure limiting valve (hydraulic specific, not ordinary solenoid valve) used for overpressure protection and pressure stability control of hydraulic/lubrication systems.

1、 Model meaning (complete decoding)

HV: Pilot operated sliding piston pressure limiting valve (without exhaust)

25: nominal diameter DN25

A1: Spring pressure range 1-12 bar (applicable to the same series)

G1: Connection method G1 'internal thread

A40: Factory set pressure of 40 bar (adjustable within the corresponding range)

2、 Core technical parameters

table

German Clark KARCHT pressure limiting valve HV25A1G1A40

3、 Working principle (pilot operated pressure limiting)

Normal operating conditions: When the system pressure is below 40 bar, the pilot valve closes, the main valve core remains closed under the action of the spring, and the oil circuit flows normally.

Overpressure protection: When the system pressure is ≥ 40 bar, the pilot valve opens first, creating a pressure difference between the upper and lower chambers of the main valve core, which pushes the main valve core to open and quickly release pressure, protecting the system.

Reset: When the pressure drops below the set value, the pilot valve closes, the main valve core resets under the action of the spring, and the oil circuit returns to normal.

4、 Product Features

Pilot control+sliding piston: high pressure regulation accuracy, fast response, smooth operation without vibration.

Strong anti pollution ability: suitable for high viscosity media and harsh industrial environments.

German precision manufacturing: The valve body is made of high-strength ductile iron, with reliable sealing and long service life.

Easy installation and maintenance: compact structure, built-in exhaust screw, vertically installed to exhaust pilot chamber air.

5、 Typical applications

Overpressure protection for hydraulic stations and lubrication systems

Industrial hydraulic equipment such as injection molding machines, machine tools, and presses

Hydraulic circuit pressure control for wind power, ships, and mining machinery

6、 Selection and installation points

Confirm that the system pressure is ≤ 160 bar and the flow rate is ≤ 350 L/min.

The medium is mineral oil/synthetic hydraulic oil, with a temperature range of -20~80 ℃.

It is recommended to install vertically to facilitate the discharge of air from the pilot chamber and avoid cavitation.

Hydraulic oil needs to be filtered (recommended)β10≥75）To prevent the valve core from getting stuck.