Absolute Pressure Gage for Gas Pneumatic Pistons

 I. Product Introduction:

The Absolute Pressure Gas Piston Gauge, based on the gas piston pressure gauge, incorporates elements such as a vacuum pump and vacuum chamber, creating an absolute pressure environment for the measurement system. This allows for the measurement of absolute pressure, with all its specifications conforming to the "Gas Piston Pressure Gauge" verification regulations.

This series of pressure gauges is primarily composed of components such as the piston system, special weights, pressure tester, vacuum chamber, and gas source.

Using gas as the working medium, it can measure gauge pressure and absolute pressure. The three-piston system ensures a wide measurement range and high accuracy. Both the piston rod and cylinder are made of tungsten carbide, guaranteeing the piston's corrosion and wear resistance, good stability, and long service life.

Section II: Technical Parameters of the Absolute Pressure Piston



1. Working Conditions:

Ambient Temperature: (20±2)°C

Relative Humidity: 40% to 80%

Frequency: 50 Hz

Power Voltage: AC 220V

2. Technical Specifications:

• Model: CW-SDQJ060
• Range: 6kPa～300kPa; 30kPa～1.5MPa; 150kPa～6MPa; 150kPa～7.5MPa
• Accuracy Grades: 0.005 Grade; 0.01 Grade; 0.02 Grade; 0.05 Grade;
• Function: Can be used as a pressure gauge for volume transmission, and can calibrate digital pressure gauges, absolute pressure digital pressure gauges, precise pressure gauges, absolute precise pressure gauges, general pressure gauges, pressure transmitters, etc.
• Working Medium: Nitrogen / Clean Air
• Piston Material: Piston rod made of ceramic, piston cylinder made of tungsten carbide.
• Weighing Configuration: Kilogram (Kg) or Megapascal (MPa) weights available as per customer requirements.
• Weight correction: Adjust for gravitational acceleration based on the location of use.
• Weighing material: Non-magnetic stainless steel.
• Pressure Testing Method: Absolute/ Gauge Pressure
• Pressure Output: M20x1.5 standard quick connector
• Power Supply: 220V ± 10%
• Other Configurations: Pressure Sensor, Temperature Sensor, Position Sensor, RPM Sensor, Vacuum Gauge.
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3. Product Performance:

• Compliant with JJG 1086-2013 "Gas Piston Pressure Gauge Metrological Verification Regulation."
• Core components consist of three piston systems, utilizing special grinding technology for high sensitivity in the piston systems.
• Piston rods are made of ceramic, and piston cylinders are made of tungsten carbide, both being materials of high strength, hardness, and low thermal expansion coefficients. This enhances the piston's wear resistance and reduces the linear expansion and deformation coefficients of the piston rod and cylinder.
• The absolute pressure gauge uses high-purity nitrogen/clean air as the medium, eliminating the influence of lubricating oil viscosity, thereby enhancing the sensitivity of the gauge.
• Equipped with multi-level filtration, it prevents fine dust from entering the piston, affecting measurement accuracy and normal计量 work.
• Equipped with a dedicated vacuum cover, capable of measuring gauge and absolute pressure, enhancing the utilization of the pressure gauge.
• The piston system is controlled by electric power, preventing the inability to rotate after the vacuum cover is installed.
• The machine base is made of aluminum alloy, featuring light weight, durability, corrosion resistance, and an aesthetically pleasing appearance.
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4. Technical Features:

1. Pistons and piston cylinders are precision ground, resulting in minimal roundness error and clearance. This significantly extends the piston's rotational duration, correspondingly reducing the piston's descent speed, thereby enhancing its distinguishing ability.

2. Equipped with a dedicated vacuum cover and vacuum pump for precise measurement of absolute and gauge pressure.

3. The weights have been corrected for pressure deformation coefficient and local gravity acceleration.

4. Optional digital display feature: Digital display of parameters such as temperature, displacement, speed, and pressure.

5. Measurement Range: Nominal measurement range is consistent with actual measurement range.

6. The piston system can be easily removed for inspection (without having to carry the heavy main unit).

7. Suitable for both transmission and calibration of piston-type pressure gauges, as well as high-precision testing. We offer weights in kg or MPa options.

8. Equipped with advanced pressure systems, lightweight and durable.

9. Utilizes quick-pressure connectors with no air leakage.

10. When measuring absolute pressure, the vacuum chamber can reach below 10 Pa.