1624117200 Atlas Copco Original DIFF. PRESSURE GAUGE FOR OIL INJECTED SCREW COMPRESSOR

I. Basic Structure and Working Principle of Atlas Copco Air Compressor Pressure Gauges

The main components of an air compressor pressure gauge include the elastic element (for sensing pressure), the transmission mechanism (for amplifying deformation), and the indication device (for displaying readings):

Elastic element: The most common type is the spring tube (a hollow metal tube bent into a C shape). When compressed air is introduced into the tube, the spring tube undergoes elastic deformation due to the internal pressure, which is then transmitted through a connecting rod to the transmission mechanism.

Transmission mechanism: Composed of gears, levers, etc., it amplifies the tiny deformation of the elastic element and drives the pointer to rotate.

Indication device: The dial scale and the pointer work together to directly display the pressure value (common units are MPa, bar, or psi).

II. Common Types and Application Scenarios of Atlas Copco Air Compressor Pressure Gauges

Based on the measurement principle and structure, air compressors commonly use pressure gauges of the following types:

Ordinary pointer-type pressure gauge

Features: Simple structure, low cost, intuitive reading, suitable for most air compressor systems (such as air storage tanks, main pipeline pressure monitoring).

Accuracy grade: Commonly 1.6 grade (allowable error ±1.6%), meeting general industrial requirements; for precise applications, 1.0 grade can be selected.

Seismic pressure gauge

Structure: The case is filled with glycerol or silicone oil to buffer the impact of vibration on the pointer and prevent pointer jitter and internal component wear.

Application scenarios: Mobile air compressors, piston-type air compressors (with significant vibration) or systems with frequent pressure fluctuations. Electrical contact pressure gauge

Function: In addition to indicating pressure, it can issue an electrical signal when the pressure exceeds the preset limit (upper and lower limits) and联动 control the start and stop of the air compressor or trigger an alarm (such as stopping the machine for protection when the pressure exceeds the upper limit).

Application: Automatic control of air compressor systems， achieving automatic pressure regulation.

Digital pressure gauge

Features： Measured pressure by electronic sensor， displayed in digital form on LCD， high precision (often above 0.5 grade)， can be equipped with data recording and communication functions (such as RS485 interface).

Applicable： Intelligent air compressor systems or situations requiring precise pressure control (such as laboratories, precision manufacturing).

III. Core Parameters and Selection Tips for Atlas Copco Air Compressor Pressure Gauges Measurement range

It is necessary to cover the actual working pressure of the air compressor (usually 0~1.6MPa, 0~2.5MPa), and when selecting the range, follow the principle that "the working pressure should be between 1/3 and 2/3 of the range" (for example, if the working pressure is 0.7MPa, a range of 0~1.6MPa can be selected), to avoid the degradation of accuracy caused by long-term operation at the range edge. accuracy level

For ordinary working conditions, a 1.6 grade is sufficient; for measurement or precise control, a 0.4 grade or 0.25 grade (with even smaller errors) is required. Interface Specification

Threaded interfaces are commonly M14×1.5, G1/4, NPT1/4, etc., and need to match the interface of the air compressor pipeline. Installation can be done through adapter conversion.

Environmental adaptability

Temperature: -40~70℃ (standard type), for high-temperature environments, select high-temperature resistant models (such as silicone-filled shock-resistant gauges).

Media compatibility: When the compressed air contains oil mist, ensure that the internal components of the gauge are oil-resistant; for air compressors without oil, choose stainless steel material (for corrosion resistance).

Installation and Use Specifications for Atlas Copco Air Compressor Pressure Gauges Installation location

It should be installed in an easily observable and vibration-free position (such as the top of the air storage tank, the air compressor outlet pipeline), avoiding direct sunlight or close to heat sources (to prevent temperature from affecting accuracy).

Horizontal or vertical installation (according to the direction indicated on the dial), with an inclination angle not exceeding 30°, otherwise it will cause reading errors.

Installation requirements

Install a buffer tube (such as a coil pipe or a stop valve): to reduce the impact of pressure pulsation on the gauge core and extend its lifespan.

Exhaust gas before initial use: When opening the valve, operate slowly to discharge the condensate water or impurities in the pipeline to prevent damage to the internal components.

Regular calibration

According to the measurement requirements, calibrate at least once a year (by comparing with a standard pressure gauge), if the deviation is excessive, it needs to be repaired or replaced to ensure accurate readings (especially for pressure gauges in storage tanks related to safety).