BURKERT angle seat valve

Our company has been in the automation industry for 10 years, with our own companies in Germany, the United States, Shanghai, and Guangdong, specializing in the import trade industry.

German BURKERT solenoid valves should follow safety, reliability, and applicability in sequence

Solenoid valve is an industrial equipment controlled by electromagnetic force, which is an automation basic component used to control fluids. It belongs to actuators and is not limited to hydraulic and pneumatic systems. It is used in industrial control system to adjust the direction, flow, speed and other parameters of medium. BURKERT solenoid valves can be used in conjunction with different circuits to achieve the desired control, while ensuring both precision and flexibility of the control. There are many types of BURKERT solenoid valves, and different BURKERT solenoid valves play a role in different positions of the control system, such as one-way valves, safety valves, directional control valves, speed regulating valves, etc.

The solenoid valve has a sealed chamber with through holes at different positions, each connected to a different oil pipe. The middle of the chamber is a piston, and there are two electromagnets on both sides. The valve body will be attracted to which side when the magnet coil on the other side is energized. By controlling the movement of the valve body, different oil discharge holes can be opened or closed. The oil inlet hole is normally open, and hydraulic oil will enter different oil discharge pipes. Then, the pressure of the oil will push the piston of the oil cylinder, which in turn drives the piston rod, which drives the mechanical device. In this way, the mechanical motion is controlled by controlling the current on and off of the electromagnet.

、 BURKERT solenoid valves can be classified into three main categories based on their principles:

Direct acting BURKERT solenoid valve

Principle: When powered on, the electromagnetic coil generates electromagnetic force to lift the closing member from the valve seat, and the valve opens; When the power is cut off, the electromagnetic force disappears, and the spring presses the closing member against the valve seat, causing the valve to close.

Characteristics: It can work normally under vacuum, negative pressure, and zero pressure, but the diameter generally does not exceed 25mm.

Step by step direct acting BURKERT solenoid valve

Principle: It is a combination of direct action and pilot operated principle. When there is no pressure difference between the inlet and outlet, after being energized, the electromagnetic force directly lifts the pilot small valve and the main valve closing member upward in sequence, and the valve opens. When the inlet and outlet reach the starting pressure difference, after being energized, the electromagnetic force pilot small valve, the lower chamber pressure of the main valve rises, and the upper chamber pressure drops, thereby using the pressure difference to push the main valve upwards; When the power is cut off, the pilot valve uses spring force or medium pressure to push the closing member downwards, causing the valve to close.

Features: It can also operate under zero pressure difference, vacuum, and high pressure, but with high power, it must be installed horizontally.

Pilot operated BURKERT solenoid valve

Principle: When powered on, the electromagnetic force opens the pilot hole, causing the pressure in the upper chamber to rapidly decrease, creating a pressure difference of high and low around the closing element. The fluid pressure pushes the closing element to move upward, and the valve opens; When the power is cut off, the spring force closes the pilot hole, and the inlet pressure quickly forms a lower and higher pressure difference around the closing valve through the bypass hole. The fluid pressure pushes the closing valve to move downward and close the valve.

Features: The upper limit of the fluid pressure range is relatively high, and it can be installed freely (customized), but it must meet the fluid pressure difference conditions.

、 BURKERT solenoid valves are divided into six sub categories based on differences in valve structure, materials, and principles: direct acting diaphragm structure, step-by-step direct acting diaphragm structure, pilot diaphragm structure, direct acting piston structure, step-by-step direct acting piston structure, and pilot piston structure.

、 BURKERT solenoid valves are classified by function: water BURKERT solenoid valve, steam BURKERT solenoid valve, refrigeration BURKERT solenoid valve, low-temperature BURKERT solenoid valve, gas BURKERT solenoid valve, fire BURKERT solenoid valve, ammonia BURKERT solenoid valve, gas BURKERT solenoid valve, liquid BURKERT solenoid valve, micro BURKERT solenoid valve, pulse BURKERT solenoid valve, hydraulic BURKERT solenoid valve, normally open BURKERT solenoid valve, oil BURKERT solenoid valve, DC BURKERKERT solenoid valve, high-pressure BURKERT solenoid valve, explosion-proof BURKERT solenoid valve Wait.

Selection criteria

The selection of solenoid valves should first follow the four principles of safety, reliability, applicability, and economy. Secondly, the selection should be based on six aspects of on-site conditions (i.e. pipeline parameters, fluid parameters, pressure parameters, electrical parameters, action mode, and special requirements).

Selection criteria:

Select the BURKERT solenoid valve based on pipeline parameters: diameter specification (i.e. DN), interface method

）Determine the diameter (DN) size according to the on-site pipeline inner diameter size or flow requirements;

）Interface method, generally>DN50 requires flange interface, ≤ DN50 can be freely selected according to user needs.

Select the material and temperature group for BURKERT solenoid valve based on fluid parameters

）Corrosive fluids: corrosion-resistant BURKERT solenoid valves and all stainless steel should be selected; Edible ultra clean fluid: it is recommended to use food grade stainless steel material BURKERT solenoid valve;

）High temperature fluid: choose BURKERT solenoid valves made of high-temperature resistant electrical materials and sealing materials, and choose piston type structures;

）Fluid state: up to gaseous, liquid, or mixed state, especially when the diameter is greater than DN25, it must be distinguished;

）Fluid viscosity: Usually below 50cSt, it can be freely selected. If it exceeds this value, a high viscosity BURKERT solenoid valve should be used.

Selection of BURKERT solenoid valve based on pressure parameters: principle and structural variety

）Nominal pressure: This parameter has the same meaning as other general valves and is determined based on the nominal pressure of the pipeline;

）Work pressure: If the work pressure is low, the principle of direct action or step-by-step direct action must be selected; When the working pressure difference is above 0.04Mpa, direct acting, step-by-step direct acting, and pilot operated can all be selected.

Electrical selection: The voltage specifications should preferably be AC220V or DC24, which are more convenient.

Choose based on the duration of continuous work: normally closed, normally open, or continuously powered on

）When the BURKERT solenoid valve needs to be opened for a long time and the duration exceeds the closing time, the normally open type should be selected;

）If the opening time is short or the opening and closing time is not long, choose the normally closed type;

）However, for some working conditions used for safety protection, such as furnace and kiln flame monitoring, the normally open type cannot be selected, and the long-term electrified type should be selected.

Select auxiliary functions according to environmental requirements: explosion-proof, check, manual, waterproof fog, water shower, diving.

Selection principle

Security:

Corrosive media: Plastic king BURKERT solenoid valves and all stainless steel should be selected; For strongly corrosive media, isolation membrane type must be selected. For neutral media, it is also advisable to use copper alloy as the valve shell material for BURKERT solenoid valves. Otherwise, rust debris often falls off from the valve shell, especially in situations where the operation is not frequent. Ammonia valves cannot use copper materials.

Explosive environment: Corresponding explosion-proof products must be selected, and waterproof and dustproof varieties should be selected for outdoor installation or in dusty environments.

、 The nominal pressure of BURKERT solenoid valve should exceed the maximum working pressure inside the pipe.

Applicability:

Characteristics of the medium

）Select different varieties of BURKERT solenoid valves for gas, liquid, or mixed states;

）Products with different specifications and medium temperatures may cause the coil to burn out and the sealing components to age, seriously affecting their service life;

）The viscosity of the medium is usually below 50cSt. If it exceeds this value and the diameter is greater than 15mm, use a multifunctional BURKERT solenoid valve; When the diameter is less than 15mm, use a high viscosity BURKERT solenoid valve.

）When the cleanliness of the medium is not high, a backwash filter valve should be installed in front of the BURKERT solenoid valve. When the pressure is low, a direct acting diaphragm BURKERT solenoid valve can be selected;

）If the medium flows in a directional manner and backflow is not allowed, it needs to flow in both directions;

）The medium temperature should be selected within the allowable range of the BURKERT solenoid valve.

Pipeline parameters

）Select valve ports and models based on the requirements of medium flow direction and pipeline connection method;

）Select the nominal diameter based on the flow rate and valve Kv value, or choose the same pipe inner diameter;

）Working pressure difference: Indirect pilot type can be selected for working pressure difference above 0.04Mpa; If the working pressure difference is close to or less than zero, direct action or step-by-step direct action must be selected.

Environmental conditions

）The maximum and temperature of the environment should be selected within the allowable range;

）In situations where the relative humidity is high and there are water droplets or rain, waterproof BURKERT solenoid valves should be selected;

）Special varieties should be selected for situations where there are frequent vibrations, bumps, and impacts in the environment, such as the BURKERT solenoid valve for ships;

）The use in corrosive or explosive environments should prioritize the selection of corrosion-resistant types according to safety requirements;

）If the environmental space is limited, a multifunctional BURKERT solenoid valve should be selected because it eliminates the need for a bypass and three manual valves, and is easy to maintain online.

Power supply conditions

）Select AC and DC BURKERT solenoid valves according to the type of power supply. Generally speaking, AC power supply is easy to access;

）Voltage specifications should prioritize AC220V and DC24V as much as possible;

）The fluctuation of power supply voltage is usually selected as+% 10% AC -15%, DC allowable ±% 10, if exceeding the tolerance, voltage stabilization measures must be taken;

）The rated current and power consumption should be selected based on the power capacity. Attention should be paid to the high VA value during AC starting, and indirect conductive BURKERT solenoid valves should be preferred when the capacity is insufficient.

control accuracy

）Ordinary BURKERT solenoid valves only have two positions, open and closed. When high control accuracy and stable parameter requirements are needed, multi position BURKERT solenoid valves should be selected;

）Action time: refers to the time from when the electrical signal is turned on or off to when the main valve action is completed;

）Leakage rate: The leakage rate values given on the sample are commonly used economic levels.

Reliability:

The working life is not included in the factory test items and belongs to the type test items. To ensure quality, products from reputable manufacturers should be selected.

Work system: divided into three types: long-term work system, repeated short-term work system, and short-term work system. For situations where the valve is open for a long time but only closed for a short time, it is advisable to use a normally open BURKERT solenoid valve.

When the operating frequency requirement is high, the structure should preferably use a direct acting BURKERT solenoid valve, and the power supply should preferably use AC.

Reliability of actions

Strictly speaking, this test has not yet been officially included in the professional standards of BURKERT solenoid valves in China. To ensure quality, products from reputable manufacturers should be selected. In some situations where the number of actions is not high, but the reliability requirements are very high, such as fire protection, emergency protection, etc., we must not take it lightly. It is particularly important to adopt dual insurance for two consecutive uses.

Economy:

It is one of the selected scales, but it must be economical based on safety, applicability, and reliability.

Economy is not only about the price of the product, but also about prioritizing its functionality and quality, as well as the cost of installation, maintenance, and other accessories.

More importantly, the cost of a BURKERT solenoid valve in the entire control system and even in the production line is negligible. If one chooses the wrong one for the sake of small gains, it can cause huge damage to the group.