SMCmanometerIt is widely used in multiple industries to monitor and calibrate pressure functions and applications. In most cases, they are designed, configured, and produced to exactly meet the specific needs of the industry and provide accurate and precise data.

Regardless of the widespread use of the pressure gauge, it is important to carefully consider all factors related to the pressure gauge when deciding to install it. The need to select the right gauge to accurately measure the process helps to avoid many of the problems associated with gauge failure.

accuracy

According to the American Society of Mechanical Engineers (ASME), pressure gauges have an accuracy range of 4A to D, which is outlined in ASME 40.1. For mechanical pressure gauges, accuracy is determined by a percentage of the full scale or range. As accuracy increases, so does the price.

Determination of the required accuracy depends on the function of the pressure gauge; The functions of pressure gauges range from simple testing to the monitoring of complex industrial processes. Under normal circumstances, the full scale accuracy of the test pressure gauge should be 0.25% to 0.10%, while the critical process requires an accuracy of 0.5%. Less critical processes can have an accuracy of 2%.

dialing

Gauge dials vary with the type of gauge and range in size from 1.5 "to 16". The determining factors for the size of the dial are where the dial is placed and the required precision. The general rule is that larger dials are used for hard-to-access operating areas, while smaller dials can be used for easily accessible Spaces. When the gauge must be read frequently and must be very accurate, the rule of thumb is to use a large dial for quick and easy reading.

environment

Environmental factors play an important role in any monitoring, calibration or data collection equipment. In addition to the type of media being examined, environmental factors include temperature, particulate matter in the medium and atmosphere, condensation and humidity.

A major factor in the environment is temperature, which can significantly affect the gauge reading. There are models of pressure gauges designed to compensate for temperature. Where there are extreme temperature changes, the instrument should be isolated to protect it. In environments with corrosive materials, particulate matter or humid conditions, use a pressure gauge with a weatherproof seal and filled with liquid.

medium

The choice of pressure gauge should be consistent with the medium to be monitored and the medium to be subjected to. Manufacturers offer a wide range of pressure gauge options for corrosive conditions, various types of chemicals and gases, and conditions where there is a risk of shock, pulsation or vibration.

A popular choice for aggressive environments, such as wastewater treatment plants, petrochemical processing or chemical manufacturing, is a meter made of stainless steel, which provides excellent protection against shock, vibration and extreme temperatures.

Other things used to protect the pressure gauge from dangerous media are various forms of seals, such as diaphragm seals that can be installed on any type of pressure gauge. Manufacturers also offer custom sealing materials such as tantalum and teflon.

join

When choosing a connection, it is important to consider process pressure, meter size and weight, space, and leak integrity. Gauges have national pipe threads (NPT) or G-connections. Whether the connection is NPT or G usually depends on the geographical location of the gauge. In the United States or Canada, the connection is usually NPT, which is the standard thread type of the American National Standards Institute (ANSI) and ASME. The external NPT connection is conical and the thread diameter decreases gradually from the tip to the socket because the conical thread forms a better seal.

G connections exist in Europe, Asia, and Latin America, and can be found anywhere else in the world except Canada and the United States. The threads will be straight according to the British Standard Parallel Tube (BSPP) connector style, distinguished by the letter "G". The parallel thread design of the G connector allows the gauge to be periodically installed and removed without damaging the threads, but a sealing gasket is required to seal the connection.

In addition to NPT and BSPP connection types, other types include German Standard Specifications (DIN), Japanese Industrial Standards (JIS), and SAE.

Connection position

One obvious factor about the connection is that it is designed to connect the meter to the application. The location and size of the connection allows for more functionality. Undermount gauges can be connected to female joints facing up, while rear-facing connections can make reading awkward.

The installation options include direct stem under connection, remote surface mounting under connection, panel surface after installation, panel hole U-clamp after flush installation, or panel hole front flange after flush installation.

Pressure range

The maximum working pressure should not exceed 75% of the full scale. Selecting a pressure gauge beyond this range will result in pressure gauge fatigue and failure.

According to the

The pressure sensor elements are made of a variety of metals, including brass, bronze, alloy steel, stainless steel, Monel and Inconel. Much like many other factors in choosing a pressure gauge, the choice of components depends on the medium to be monitored. The types of elements must be compatible with the media and be able to withstand all aspects of the media that can harm or damage them.

The above content describes how to choose SMC pressure gauge. The problem. In addition, Shenzhen Oudejie Technology specializes in selling new original imported SMC pressure gauges, and promises to sell products are new original imported, while providing our customers with quotation, selection, product information and other services.