TRAFAG Electromechanical Pressure Switches

TRAFAG Electromecahnical Pressure Switches

 

Trafag’s electromechanical pressure switches are engineered to offer exceptional vibration resistance and precise switch point accuracy. Their extremely robust and durable construction ensures they can operate for decades without the need for maintenance, even in challenging environments. With designs that incorporate bellows, membrane, and piston sensors, these switches can handle a broad spectrum of pressure ranges, media, and load profiles suitable for various applications. The pressure switches are also available with Ex and maritime approvals, as well as compliance with railway standards.

Electromechanical pressure switches are devices that are widely used to monitor and control pressure levels in various industrial and domestic applications. These switches are critical in ensuring that systems operate within safe and efficient pressure ranges. Below, we delve into the key aspects of electromechanical pressure switches, including their function, components, types, and applications.

 

        Pressure

Function of Electromechanical Pressure Switches

Electromechanical pressure switches operate by converting pressure input into mechanical movement, which then actuates an electrical switch. Their primary function is to detect when a pressure threshold (setpoint) has been reached and to open or close an electrical circuit accordingly. This mechanism allows them to start or stop devices such as pumps, compressors, or alarms.

             Trafag pressure switch 900-serie

Key Components

 

  1. Pressure Sensing Element
  2. Mechanical Linkage
  3. Electrical Switch
  4. Setpoint Adjustment
  5. Housing

Working Principle

  1. Pressure Application: Pressure is applied to the sensing element (diaphragm, piston, or bellows).
  2. Movement: The sensing element moves in response to pressure changes.
  3. Actuation: This movement is transmitted via mechanical linkage to the electrical switch.
  4. Switching: When the pressure reaches the setpoint, the switch is actuated, opening or closing the electrical circuit.

Types of Electromechanical Pressure Switches

  1. Single Pole Single Throw (SPST): Switches one circuit on or off.
  2. Single Pole Double Throw (SPDT): Switches between two circuits, allowing one to be on and the other off.
  3. Double Pole Single Throw (DPST): Controls two separate circuits simultaneously.
  4. Double Pole Double Throw (DPDT): Can switch two different circuits between two different states.

Applications

  1. Shipbuilding – engines
  2. Industrial Automation
  3. Hydraulics
  4. HVAC Systems
  5. Automotive
  6. Water Systems
  7. Medical Equipment

Advantages and Limitations

Advantages:

  • Reliability: High reliability due to simple mechanical operation.
  • Cost-Effective: Generally less expensive than electronic pressure sensors.
  • Durability: Can withstand harsh environments and physical abuse.

Limitations:

  • Precision: Less precise compared to electronic pressure sensors.
  • Wear and Tear: Mechanical components can wear out over time, requiring maintenance.
  • Speed: Slower response time compared to electronic switches.

Maintenance and Troubleshooting

  1. Regular Inspection: Check for signs of wear or damage.
  2. Calibration: Periodically calibrate the setpoint to ensure accurate operation.
  3. Cleaning: Keep the switch and surrounding area free of dust and debris.
  4. Replacement of Worn Parts: Replace diaphragms, pistons, or other moving parts that show signs of wear.

Trafag’s Electromechanical pressure switches are an integral part of many systems that require reliable pressure monitoring and control. Their robust and straightforward design makes them suitable for a wide range of applications, ensuring safe and efficient operation in various industries.