Medical Sector - Technical Support
- Introduction
- Solenoid valve definition and classification.
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- Number of Ways
- A description with cross-sectional diagrams of 2, 3, 4 and 5-Way solenoid valves.
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- Functions
- Normally Closed (NC), Normally Open (NO), Universal and Latch/Bistable options explained.
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- Proportional Solenoid Valves
- Explanation of power supply, sealing, control and other essential parameters in specifying a proportional solenoid valve.
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- Operating Mechanism
- An explanation together with cross-sectional diagrams of direct and pilot-operated valves.
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- Dry Operated Valves
- Separated membrane and pinch tube technologies explained with cross-sectional schematic diagrams.
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- Pneumatic Factors
- Factors affecting the choice of the most suitable solenoid valve for a given application.
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- Pressure
- Explanation of different degrees of vacuum, pressure drop, and differential minimum/maximum functioning pressures
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- kv Flow Factor
- kv flow factor equations and diagram, flow factor adjustment equation and viscosity conversion chart (centiStokes/Engler degrees). Also, kv flow factor in sub- and supersonic gases.
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- kv Flow Factor Calculation
- Links to programs for calculating kv flow factor in gases and liquids.
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- Flow Calculation
- Links to programs for calculating flows in gases and liquids.
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- Response Time & Cycling Rate
- A look at response times at energising and de-energising, as well as consideration of the effect of alternating current on response time, and cycling rates.
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- Electrical Parameters
- The parameters which define a solenoid, for example pull-in voltage, drop-out voltage, and supply frequency. Also an explanation of shading rings, temperature effects and further points to note.
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- IP Degrees of Protection
- The degrees of protection provided by enclosures (IP Code), together with an example.
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