ETNA Pressure Switch
Etna Pressure Switch
The Etna Pressure Switch can be used in both booster pump (hydrofor) and compressor systems. The relief fitting comes with the product and can be mounted on the switch body if desired, enabling its use in compressors. Etna switches are TSE and CE certified.
Warranty:
ETNA pressure switches are guaranteed for two years from the date of sale. However, damages resulting from improper installation or misuse are not covered under warranty.
Pressure Switch Overview
Technical Specifications:
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PA type ETNA pressure switches are designed to automatically start and stop booster pumps and water pumps.
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PA-V type ETNA pressure switches with relief are manufactured for air compressors, allowing the air in the pressure pipe to be released when the compressor stops, facilitating the initial startup under pressure.
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Air compressors use relief-equipped pressure switches, while hydrofor systems use non-relief pressure switches.
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The three-way safety adapter allows the direct installation of a manometer and safety valve on the switch without additional equipment.
Pressure Ranges by Model:
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PA-1: Stop pressure 2.5–5 Atü, start pressure adjustable 0.5–3.9 Atü depending on stop pressure.
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PA-2: Stop pressure 7–11 Atü, start pressure adjustable 3–9 Atü.
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PA-3: Stop pressure 11–16 Atü, start pressure adjustable 4–13 Atü.
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PA-4: Stop pressure 4–8 Atü, start pressure adjustable 1–7 Atü.
How to Adjust the Etna Pressure Switch
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After installation, start the system and let it run until it reaches the stop pressure. Turn the adjustment screw at the top counterclockwise to reduce the spring pressure.
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Clockwise rotation increases the stop pressure, while counterclockwise rotation decreases it.
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If the system activates before reaching the desired pressure, the stop-start differential is small. Turning the start adjustment screw clockwise (+ direction) increases the pressure differential. The start adjustment affects only the start pressure.
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The start pressure should be adjusted while the switch is under pressure. This adjustment does not change the stop pressure. This is crucial for centrifugal pumps, as it allows changing the differential pressure without affecting the stop pressure. For switches with a manometer, this adjustment can be done easily by monitoring the pressure.