Product Content
Category
Construction Materials-Other Building Materials
Burkert Electromagnetic Valve, Model 5281 Electromagnetic Valve with Servo Diaphragm
Applicability
1. Medium Characteristics
1.1 For gases, liquids, or mixed states, different types of electromagnetic valves should be selected: for air, use ZQDF; for liquids, use ZQDF-Y; for steam, use ZQDF-2 (or -3); otherwise, misoperation may occur. The ZDF series multifunctional electromagnetic valves can be used for both gases and liquids. It is advisable to specify the medium state when placing an order, so the installation user does not need to adjust it again.
1.2 Different specifications for medium temperature; otherwise, the coil may burn out, and the sealing components may age, severely affecting lifespan.
1.3 For medium viscosity, generally below 50 cSt. If exceeding this value, for a diameter greater than 15mm, use ZDF series multifunctional electromagnetic valves as special orders. For a diameter less than 15mm, order high-viscosity electromagnetic valves.
1.4 If the cleanliness of the medium is not high, a backwashing filter valve should be installed before the electromagnetic valve; if the pressure is low, a direct acting diaphragm electromagnetic valve such as CD-P may be used.
1.5 If the medium is in directed flow and backflow is not allowed, use ZDF-N and ZQDF-N; if bidirectional flow is required, please specify as a special request.
1.6 The medium temperature should be selected within the allowable range of the electromagnetic valve.
2. Pipeline Parameters
2.1 Select valve ports and models based on the medium flow direction requirements and pipeline connection methods. For instance, for switching from one pipe to two pipes, choose small diameters CA5 and Z3F; for medium or large diameters, please select ZDF-Z1/2. If controlling the confluence of two pipelines, please select ZDF-Z2/1, etc.
2.2 Select the nominal diameter based on flow rate and valve Kv value, which can also be chosen to match the internal diameter of the pipeline. Please note that some manufacturers do not label the Kv value, and often the valve hole size is smaller than the interface pipe diameter; do not compromise quality for a lower price.
2.3 The minimum working pressure difference should be above 0.04Mpa for indirect pilot type; if the minimum working pressure difference is close to or less than zero, direct acting or step direct type must be selected.
3. Environmental Conditions
3.1 The environment's high and low temperatures should be within the allowable range; if there are deviations, special orders should be made.
3.2 In environments with high relative humidity and water droplets or rain, waterproof electromagnetic valves should be selected.
3.3 In environments with frequent vibrations, bumps, and impacts, special types should be selected, such as marine electromagnetic valves.
3.4 For use in corrosive or explosive environments, prioritize selecting corrosion-resistant types based on safety requirements.
3.5 If space is restricted, please select multifunctional electromagnetic valves, as they eliminate the need for bypass and three manual valves, facilitating online maintenance.
4. Power Supply Conditions
4.1 Select AC and DC electromagnetic valves based on the type of power supply. Generally, AC power is more convenient.
4.2 Voltage specifications should preferably be AC220V or DC24V.
4.3 Power voltage fluctuations for AC should usually be +10% to -15%; DC allows for about ±10%. If deviations exceed this, voltage stabilization measures must be taken or special order requests made.
