Proportional Valves
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Product Overview SOLENOID VALVES

Technology of Proportional Valves Content Introduction Fascination Burkert Product Overview: Proportional Solenoid Valves Product Overview: Motor-driven Proportional Valves Valve Selection Chart Setup and Functioning of Proportional Valves 22 Sizing of Proportional Valves Burkert has been hard at work on metering and controlling fluids for more than 70 years. Anyone focussing so much on fluid substances for so long will always also learn about their own attributes. Burkert engineers are extremely practical in interpreting their experiences with fluids, and in the development of increasingly...

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Fascination Bürkert Welcome to the Fascinating World of Fluid Control Systems Bürkert Product Program Measurement and control: When it comes to working with liquids and gases, we are at your side – as a manufacturer of We are one of the few suppliers on the market to cover the complete control loop. Our current product range sophisticated products, as a problem-solver with an eye for the big picture, and as a partner offering you reliable advice. extends from solenoid valves through process and analytical valves to pneumatic actuators and sensors. Since we started in 1946, we have developed...

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Burkert | Product Overwiev All proportional solenoid valves are normally closed, can be used with media at temperatures between -10 °C and +90 °C, and comply with protection class IP65. The robust 1) Within one type is generally valid: The bigger the valve orifice, the lower the maximum possible operating pressure at which the valve closes tight 2) Max. differential pressure allowed: 3 bar valves (brass or stainless steel housing) are designed for

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Burkert | Product Overwiev

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Burkert | Product Overwiev 11 Product Overview: Motor-driven Valves Energy Efficiency and Robustness with Motor Valves All motor-driven valves feature a precise electric stepper motor as actuator. The robust valves (brass or stainless steel housing) comply with protection class IP50 (type 3285) or IP54 (type 3280), can be used with media at temperatures between 0 °C and +70 °C, and are suitable

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Burkert | Solenoid Control Valves 13 Valve Selection Chart Type 2871

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Aufbau | Proportionalventile Bürkert und Funktion eines Proportional-Magnetventils Setup and Functioning of Proportional Valves In process-related practical use the terms for proportional valves might be different: Control valve, control armature or metering valve – is all describes the same product. The name refers to their function. They control and regulate the rate of flowing media (gases or liquids). Proportional valves are operated in different ways: pneumatically, piezo-electrically, electromotive and electromagnetically. The various actuating principles essentially differ in price,...

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Bürkert | Setup and Functioning Solenoid Proportional Valves Solenoid shut-off valves are the basis for Bürkert solenoid control valves. Without electrical power With an even geometry of the plunger and the plunger counterpart/stopper (flat stopper geometry) the the spring forces the plunger directly on the valve seat. With that the valve is closed. Electrical current magnetic force drops too much with rising air gap making it impossible to use the valve as a control through the solenoid (coil) causes a magnetism which lifts the plunger against the spring force. valve. Equal balance states...

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Bürkert | Setup and Functioning Controlling of Solenoid Proportional Valves Typical Functions of the Control Electronics In principle it is possible to control the proportional magnet with variable DC voltage, but static friction Current control for coil heating compensation can appear here on the plunger’s guide points. This impairs the sensitivity of the valve, and results Coil heating changes the temporary effective electrical resistance. It is therefore beneficial to control in greater hysteresis effects. To prevent static friction, the normal inlet signal is converted with a special...

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Bürkert | Setup and Functioning Motor-driven Proportional Valves There are three different versions of motor valves: Integrated electric stepper motors are the centrepiece of Bürkert's motor-driven proportional valves. Depending on the orifice, two different actuator versions are available (valve designs see Fig. 5). In – Standard version for analogue signals with end position detection both cases, the valve fitting has been optimized in favour of a high flow coefficient. – Positioner version for fieldbus communication with position sensor system – Process controller version based on...

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Kenngrößen Bürkert | Proportionalventile Characteristic Data of Solenoid Control Valves kVs value/QNn value Fluidic valve comparisons can be made via the kVs value (m³/h unit). This value is measured at water’s flow rate at 20 °C and 1 bar relative pressure at the valve inlet, compared with 0 bar at the valve outlet. A second flow rate value is often given for gases. This is the QNn value. The QNn value provides the nominal flow rate value in lN/min air (20 °C) at 6 barg at the valve inlet and 1 bar pressure loss via the valve. Standard conditions for the gas are 1013.25 mbar absolute and a...

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Bürkert | Sizing of Proportional Valves Use as Control Valve: Sizing of Valve Orifice Brief Instructions – How do I Find the Right Proportional Valve? For correct and accurate control functioning, solenoid control valves must be configured and 1. What medium (fluid) do you want to control? selected according to their special purpose. The most important parameters for selecting a solenoid With regard to its chemical-physical reaction behaviour, it must be checked whether the valve parts control valve are, on one hand, the kV value (given in cubic meters per hour) and, on the other hand, in...

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Bürkert | Typical Applications Typical Applications Burner / lame Control F Two gases must be controlled in a burner control system; both are in a desired ratio with one another. The Burner controller A Pt100 temperature sensor measures the temperature of the mixed water. The temperature controller brings this ratio of combustion gas to oxidant Mixture of Cold and Warm Water gas, e. g., air or oxygen, is determined by the flame that is required for the temperature to the given reference Temperature controller value by controlling the two solenoid control valves accordingly. respective...

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