Pneumatic Pressure Gauge Installation And Calibration Guide

Pneumatic pressure gauges are commonly used measuring devices in pneumatic systems. They are mainly used to monitor the air pressure in the system to ensure that the equipment operates in a safe and stable state. Correct installation and calibration are essential for the accuracy and service life of the pressure gauge. This article will introduce the installation steps and calibration methods of pneumatic pressure gauges in detail, and provide maintenance suggestions to help you improve the measurement accuracy and work efficiency of the equipment.

Pneumatic pressure gauge installation guide

1. Choose a suitable pressure gauge

Before installation, you need to choose a suitable pneumatic pressure gauge according to actual use needs:

Range matching: The measurement range of the pressure gauge should be 1.5~2 times the normal pressure of the system to avoid overpressure damage.

Interface specifications: Confirm that the thread type of the pressure gauge (such as NPT, BSP) matches the equipment interface.

Material requirements: If used in a corrosive environment, you can choose a stainless steel pressure gauge, and an aluminum alloy or brass material can be selected for a general industrial environment.

2. Preparation before installation

Cleaning pipes and interfaces: Ensure that there are no impurities, oil stains and moisture at the installation site to avoid affecting the measurement accuracy.

Check the seal: If sealing tape or O-ring is used, it should be intact to avoid air leakage.

Ensure the installation position is reasonable: the pressure gauge should be installed in a horizontal position to obtain a more stable reading.

3. Installation steps

Connect the pressure gauge

Use a wrench to tighten the pressure gauge to avoid damage caused by over-tightening.

If the pressure gauge needs to be installed remotely, a hose can be used to connect it to reduce the impact of vibration.

Fixing and inspection

Ensure that the pressure gauge is firmly installed to avoid external vibration affecting the reading.

Blow-up test to check for leaks or pointer jitter.

Calibration guide for pneumatic pressure gauges

1. Preparation before calibration

Confirm that the ambient temperature is suitable (usually around 20°C) to avoid temperature changes affecting the calibration accuracy.

Ensure that the calibration equipment is accurate. It is recommended to use a high-precision standard pressure gauge or pressure calibrator for comparison.

The system is leak-free to prevent external factors from interfering with the calibration results.

2. Calibration steps

Preliminary inspection

Observe whether the pressure gauge pointer returns to zero. If not, it may need to be adjusted or replaced.

Tap the case to check whether the pointer moves sensitively.

Standard pressure comparison

Gradually apply standard air pressure (such as 0.2MPa, 0.4MPa, 0.6MPa) to the pneumatic system.

Read the pressure value at each calibration point and compare it with the standard pressure.

If the error exceeds the allowable range (generally ±1~2%), the pressure gauge needs to be adjusted or replaced.

Adjustment and calibration

Some pressure gauges have fine-tuning screws, which can be adjusted with a screwdriver to make the reading consistent with the standard value.

Re-measure several times to ensure that the calibrated data is accurate and stable.

Maintenance and precautions

Regularly check whether the pressure gauge reading is stable. If the pointer is found to be stuck or the deviation is too large, it should be calibrated or replaced.

Avoid severe vibration and impact. If the working environment has large vibration, use a damping pressure gauge or install a shock-absorbing bracket.

Clean the pipeline regularly to prevent gas blockage from affecting the measurement accuracy of the pressure gauge.

If not used for a long time, it should be stored without pressure relief to prevent spring damage from affecting accuracy.