Preparations before the installation of vacuum pressure switches

The preparatory work before the installation of vacuum pressure switches is a key link to ensure their normal operation and long-term stability. The following are the key preparations that need to be completed before installation:

1.Confirm the equipment specifications and parameters

Consult the technical manual

Carefully read the technical specification or user manual of the vacuum pressure switch to confirm whether its measurement range, accuracy, pressure unit (such as kPa, mbar, inHg, etc.), and electrical parameters (voltage, current, contact capacity) match the system requirements.

Example: If the vacuum degree requirement of the system is from -100 kpa to 0kPa, a switch with a range covering this range should be selected.

Check the interface specification

Confirm whether the interface type (such as threaded interface, flange interface) and size of the switch are compatible with the system piping or equipment.

Example: If the system adopts 1/4-inch NPT threads, a switch of the same specification needs to be selected.

2. Check the installation environment

Temperature and humidity

Confirm whether the temperature and humidity of the installation environment are within the allowable range of the switch (usually -20℃ to +80℃, humidity ≤85%RH). Avoid sensor drift or circuit failure caused by high temperature, low temperature or high humidity environments.

Vibration and Shock

If there is strong vibration or shock at the installation location (such as close to the motor or pump), a switch with an anti-vibration design should be selected, or shock absorption measures should be taken (such as installing shock-absorbing pads).

Corrosive medium

If the system medium is corrosive (such as acid or alkali), switches made of corrosion-resistant materials (such as stainless steel casings) should be selected, or protective measures should be added (such as installing isolation diaphragms).

3. Prepare the installation tools and materials

Tool list

Prepare tools such as wrenches, screwdrivers, sealing tape, and raw material tape to ensure that the installation process will not be delayed due to the lack of tools.

Sealing material

Prepare appropriate sealing materials (such as PTFE raw tape, metal gaskets) according to the interface type to ensure there is no leakage at the connection.

For example, threaded interfaces need to be wound with raw tape, and flange interfaces need to use sealing gaskets.

Electrical connection materials

Prepare materials such as cables, terminal blocks, and insulating sleeves to ensure the safety and reliability of electrical connections.

4. Confirm the system status

System pressure relief and cleaning

Before installation, ensure that the system has been completely depressions and clean the impurities, oil stains, etc. inside the pipes or equipment to avoid contaminating the switch or affecting the measurement accuracy.

Check system compatibility

Confirm whether the working pressure, temperature, medium type, etc. of the system match the applicable range of the switch.

Example: If the system medium is corrosive gas, a corrosion-resistant type of switch should be selected.

5. Develop an installation plan

Determine the installation location

Select a location that is convenient for operation and maintenance and can accurately reflect the system pressure. Avoid installing the switch in areas with high temperatures, vibrations or strong electromagnetic interference.

Plan the electrical wiring

Based on the electrical parameters of the switch and the system control requirements, plan the cable routing and wiring method to ensure that the wiring complies with safety regulations.

Prepare the debugging tools

Prepare tools such as a pressure calibrator and a multimeter for calibration and testing after installation.

6. Safety and protective measures

Wear protective equipment

During the installation process, safety gloves, goggles and other equipment must be worn to prevent personal injury caused by improper operation.

Power-off operation

If electrical connections are involved, they should be carried out when the power is off to avoid the risk of electric shock.

Emergency response plan

Formulate emergency response plans for possible abnormal situations (such as leakage and short circuit) during the installation process to ensure safety.

7. Personnel training and communication

Operator training

Ensure that the installers are familiar with the technical parameters, installation steps and precautions of the switch to avoid equipment damage caused by improper operation.

Communicate with the system integrator

If the switch needs to be integrated with control systems such as PLC and DCS, it is necessary to communicate with the system integrator in advance about the interface protocol, signal type and other details to ensure compatibility.

Summary

The preparatory work before the installation of vacuum pressure switches needs to be comprehensively prepared from multiple aspects such as equipment specifications, environmental conditions, tool materials, system status, installation plans, safety protection and personnel training. Through meticulous preparatory work, it can be ensured that the switch can operate stably after installation, reduce the risk of failure and extend the service life of the equipment.