KRACHT spot solenoid valve WL4BNZ10XP9EK3K1110-S1

KRACHT spot solenoid valve WL4BNZ10XP9EK3K1110-S1， KRACHT Pressure Control Valve DVR Series

The DV R pressure control valve is a type of guided pressure relief valve with external hydraulic activation. It allows for the control of system pressure without considering pressure losses occurring between valves and external control ports. Typical applications include pressure control in the grease circuit of diesel engines.

The function of KRACHT overflow valve:

1. Constant pressure overflow effect: In the quantitative pump throttling regulation system, the quantitative pump provides a constant flow rate. When the system pressure increases, it will reduce the flow demand. At this point, the overflow valve opens, allowing excess flow to overflow back into the oil tank, ensuring a constant inlet pressure of the overflow valve, i.e. a constant pump outlet pressure (the valve port often opens with pressure fluctuations).

2. Voltage stabilizing effect: The relief valve is connected in series on the return oil path, generating back pressure and increasing the stability of moving parts.

3. System unloading function: Connect a low flow solenoid valve in series with the remote control port of the overflow valve. When the solenoid is energized, the remote control port of the overflow valve is connected to the oil tank, and the hydraulic pump is unloaded. The overflow valve is currently used as an unloading valve.

4. Safety protection function: When the system is working normally, the valve is closed. Only when the load exceeds the specified limit (system pressure exceeds the set pressure), the overflow is opened for overload protection, so that the system pressure no longer increases (usually the set pressure of the overflow valve is 10%~20% higher than the system working pressure)

The KRACHT Clark HV/HVF pressure relief valve is a pilot operated slide valve used for installation in pipelines, and can therefore be used to protect medium pressure hydraulic circuits up to 100 meters. 160 bar. SAE flanges (3000 psi) or Whitworth pipe threads (G) can be used for pipeline connections. Due to the valve core pilot control, this valve can also be used for higher viscosity.

feature

Volume flow rate:... 350 l/min

Medium temperature: -20... 80 ° C

Nominal pressure:... 160 bar

A pressure relief valve is a device used to protect a system from excessive pressure, and its working principle is mainly based on pressure control to ensure that the system pressure is always within a safe range. The following is a detailed analysis of the working principle of the pressure relief valve:

Pressure relief valves typically consist of the following key components:

• Main valve: Divided into upper and lower parts by a diaphragm, the lower chamber of the diaphragm is the water flow channel, and the upper chamber is the control chamber, which controls the opening and closing of the main valve disc.

• Pilot valve: It is also a pressure relief valve, responsible for controlling the opening and closing of the main valve.

• Needle valve: also known as a throttle valve, controls the flow of water in the connecting pipe.

• Spring: Used to set the pressure threshold. When the pressure exceeds the set value, the spring is compressed and the valve opens.

• Pressure relief valves are widely used in hydraulic systems, fire protection systems, long-distance pipelines, and other scenarios to prevent damage caused by excessive pressure. For example, in the fire protection system, the pressure relief valve adjusts the length of the built-in spring and sets a pressure threshold to ensure that the pressure in the pipeline is always within a safe range.

• The core function of a pressure relief valve is to automatically open when the system pressure exceeds the preset value, releasing excess pressure and maintaining the system pressure within a safe range. When the system pressure is lower than the set pressure, the pressure relief valve remains closed; Once the pressure exceeds the predetermined set point, the valve will open, allowing fluid to temporarily escape until the pressure drops to an acceptable level, and the valve will seal again, stopping fluid flow.

• Pressure below set value: The thrust of the pilot valve spring is greater than the pressure of the water, the pilot valve disc is in the closed state, and the main valve remains closed.

• Pressure exceeds the set value: The water pressure is greater than the spring thrust, the pilot valve is opened, and the upper chamber of the main valve begins to release pressure. Due to the control of the throttle valve and insufficient water replenishment, the pressure in the upper chamber of the main valve decreases. The water flow thrust in the lower chamber of the main valve disc is greater than the pressure in the upper chamber, causing the valve disc to rise and the main valve to open quickly to release pressure.

• Pressure recovery: When the pressure returns to a safe value, the pressure relief valve automatically closes.

• Quick response: The opening time of the water hammer relief valve is less than 100ms, ensuring rapid pressure relief in the event of a sudden increase in pressure.

• Precise control: The setting accuracy of the pressure relief valve is not less than ± 1% to ensure the accuracy of pressure control.

• Multifunctionality: Some pressure relief valves can be used as both pressure relief valves and pressure holding valves to maintain the water supply pressure below or above the set safe value.

KRACHT spot solenoid valve WL4BNZ10XP9EK3K1110-S1The KRACHT pressure reducing valve SPV/SPVF from Germany is a direct spring sliding piston valve. Suitable for pipeline installation and maintenance of low-pressure hydraulic circuits. The principle of KRACHT safety valve utilizes the pressure regulation of springs to control the pressure of hydraulic oil. From the figure, it can be seen that when the pressure of the hydraulic oil is less than the required working pressure, the valve core is pressed by the spring at the inlet of the hydraulic oil. When the pressure of the hydraulic oil exceeds its working allowable pressure, that is, greater than the spring pressure, the valve core is lifted by the hydraulic oil, and the hydraulic oil flows in and out from the right port in the direction shown in the figure, returning to the oil tank. The higher the pressure of the hydraulic oil, the higher the valve core is lifted by the hydraulic oil, and the greater the flow of hydraulic oil back to the oil tank through the relief valve. If the pressure of the hydraulic oil is less than or equal to the spring pressure, the valve core will fall and seal the hydraulic oil inlet. Due to the fixed hydraulic oil pressure output by the oil pump, the pressure of the hydraulic oil used by the working cylinder is always lower than the hydraulic oil pressure output by the oil pump. Therefore, during normal operation, there will always be some hydraulic oil flowing back to the oil tank from the relief valve to maintain the balance of the working pressure of the hydraulic cylinder and ensure normal operation. From this, it can be seen that the function of the overflow valve is to prevent the hydraulic oil pressure in the hydraulic system from exceeding the rated load, providing safety protection.

Junling Industrial Equipment (Shanghai) Co., Ltd

Technical support brands: KRACHT (flow meter, indicator, gear pump) from Germany, VSE (flow meter, display) from Germany, TEMPOSONICS sensors from the United States, WOERNER (distributor, lubrication pump, level switch) from Germany

German advantage brands: MEISTER (flow meters, sensors), KOBOLD (sensors, level gauges, flow meters), FEIN's electric tools, BURKERT (flow meters, solenoid valves)

Domestic spot brands: ATOS (proportional valve, solenoid valve, amplifier, cylinder), REXROTH (hydraulic valve, pump, sensor), PARKER (proportional valve, sensor, hydraulic motor), HYDAC (sensor, filter, filter element, valve), SUN (plug-in valve, flow valve, valve block)

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