What is pressure gauge?

Pressure gauge refers to an instrument that uses elastic elements as sensitive elements to measure and indicate pressure higher than the ambient pressure. It is extremely common in applications. It covers almost all industrial processes and scientific research fields. It can be seen everywhere in the fields of heating pipe network, oil and gas transmission, water and gas supply system, vehicle repair and maintenance factories and stores. Especially in the process of industrial process control and technical measurement, because the elastic sensitive element of the mechanical pressure gauge has the characteristics of high mechanical strength and convenient production, the mechanical pressure gauge has been more and more widely used.

The main structure of the pressure gauge

Overflow hole: In the event of an emergency such as a Bourdon tube burst, the internal pressure will be released to the outside through the overflow hole to prevent the glass panel from bursting. Note: In order to maintain the normal performance of the overflow hole, a space of at least 10mm must be left behind the table, and the overflow hole cannot be modified or plugged.

Pointer: In addition to standard pointers, other pointers are also optional.

Glass panel: In addition to standard glass, other special material glass, such as tempered glass, and non-reflective glass are also optional.

Performance classification: ordinary type (standard), ordinary type for steam (M), heat resistant type (H), vibration resistant type (V), vibration resistant type for steam (MV) heat resistant and vibration resistant type (HV).

Treatment method: oil-free/water-free treatment to remove the remaining water or oil in the wetted part during manufacturing.

Exterior designation: The shell color must be specified in addition to the standard color.

Throttle valve (optional): In order to reduce the pulsating pressure, the throttle valve is installed at the pressure inlet.

How to install the pressure gauge

Pressure gauges in the national standard "General Pressure Gauges" GB/T1226-2001 No. 4.1.2 The gauges are divided into direct installation pressure gauges, embedded installation (panel installation) pressure gauges, and convex installation (wall installation) pressure according to threaded joints and installation methods. surface.

1. The installation position of the pressure gauge should meet the requirements of the installation state, the dial should not be placed horizontally, and the height of the installation position should be convenient for the staff to observe.

2. The distance between the installation place of the pressure gauge and the pressure measuring point should be as short as possible to ensure a perfect sealing and no leakage.

3. There should be a buffer at the front end of the installed pressure gauge; in order to facilitate inspection, a shut-off valve should be installed under the instrument; when the medium is dirty or has pulse pressure, filters, buffers and stabilized gas can be used.