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Pressure switch with dry run protection SK-2A
Description: The SK-2A pressure switch is designed to monitor pressure in water supply systems and prevent pump operation in the absence of water (dry running). This model provides reliable protection and helps avoid serious equipment damage. With a manual reset function, the device is easily adjustable to meet individual user needs.
Specifications
| Parameter | Value |
|---|---|
| Dry run protection | Yes |
| Manual reset function | Yes |
| Operating pressure range | 1.4-4.6 bar |
| Differential | 1-2.1 bar (min. settings), 1.2-2.3 bar (max. settings) |
| Factory pressure setting | 1.4-2.8 bar |
| Number of contacts | 4 |
| Maximum current | 12 A |
| Connection type | Nut connection (connecting flange) 1/4" |
Selection and installation tips
When selecting a pressure switch, it is important to consider the following aspects:
- Operating pressure range: Ensure that the pressure range meets the requirements of your equipment.
- Connection type: Check that the connection type of the switch is suitable for your pump or water supply system.
- Presence of dry run protection: This is crucial for preventing damage to pump equipment.
Causes of failure and prevention
The main causes of pressure switch failure may include:
- Incorrect pressure settings, which can lead to frequent activations.
- Corrosion or mechanical damage to the contacts.
- Contamination of the system, which can cause the switch mechanism to jam.
To prevent failures, it is recommended to:
- Regularly check and adjust the pressure in the system.
- Maintain cleanliness in the water supply system.
- Perform preventive maintenance on the pressure switch every 6-12 months.
Replacement recommendations
The process of replacing the SK-2A pressure switch consists of the following steps:
- Turn off the pump and close the shut-off valves.
- Drain any remaining water from the system.
- Remove the old switch by carefully unscrewing the nut.
- Install the new pressure switch in place and tighten the nut.
- Check the connection and pressure settings for accuracy.
- Turn on the pump and check the operation of the switch.
Replacement difficulty: Low. Replacing the pressure switch can be done by anyone with basic plumbing skills.
By following these recommendations, you can effectively select and replace the SK-2A pressure switch, ensuring reliable operation of your equipment.