**Detailed Construction of Mechanical Pressure Gauges**
A general-purpose pressure gauge is suitable for measuring the pressure of media such as liquids, steam, and gases that do not pose an explosion risk, do not crystallize, do not solidify, and do not corrode copper alloys.
The pressure gauge works by utilizing the elastic deformation of sensitive elements inside the gauge (such as Bourdon tubes, diaphragms, or bellows). The pressure deformation is then transmitted through the core mechanism of the gauge to the pointer, causing it to rotate and display the pressure.
**Pointer:**
In addition to the standard pointer, other types of pointers are also optional (e.g., zero-adjustment pointers, maximum-value pointers, or set-point pointers). Please specify your choice in the selection table.
**Glass Panel:**
Besides the standard glass, special materials such as reinforced glass or non-reflective glass are also available as options.
**Overflow Hole:**
In case of an emergency where the Bourdon tube bursts, the internal pressure will be released to the outside through the overflow hole, preventing the glass panel from shattering. Note: To ensure the normal performance of the overflow hole, please leave at least 10mm of space behind the gauge and avoid modifying or blocking the overflow hole.
**Performance Classification:**
Standard type (standard), steam-use standard type (M), heat-resistant type (H), vibration-resistant type (V), steam-use vibration-resistant type (MV), heat-resistant and vibration-resistant type (HV). The application distinctions are referenced according to the JIS7505 Bourdon tube pressure gauge standard.
**Treatment Method:**
Oil-free/Water-free treatment... During manufacturing, any residual water or oil in the liquid-contacting parts is removed.
**Exterior Specification:**
Case color... If a color other than the standard is required, please specify clearly.
**Throttle Valve:** (Optional)
To reduce pulsating pressure, a throttle valve is installed at the pressure inlet.
**Pulsating Pressure:**
Due to the pulsating characteristics of the pump in the pressure generator, the characteristic curve of the pressure gauge has a larger amplitude. This is very harmful to the pressure gauge.
**Structural Principle of the Pressure Gauge:**
The measurement system of the instrument consists of a connector and a spring tube. The free end of the spring tube moves due to changes in the measured pressure, driving the pointer at the end of the fan-shaped gear through a linkage rod, indicating the corresponding pressure value on the dial. To eliminate the clearance between the fan-shaped gear and the shaft gear, a spiral hairspring is installed on the shaft gear.