Diaphragm pressure gauges are suitable for measuring the pressure or negative pressure of various fluid media that are corrosive, non solidifying, or non crystalline. The corrosion resistance performance depends on the membrane material. The pressure system and housing of the stainless steel corrosion-resistant diaphragm pressure gauge are all made of stainless steel, which has strong corrosion resistance. Mainly used for measuring small pressures of gases and liquids in the chemical, petroleum, and textile industries, especially

Diaphragm pressure gauges are suitable for measuring the pressure or negative pressure of various fluid media that are corrosive, non solidifying, or non crystalline.

The corrosion resistance performance depends on the membrane material.

The pressure system and housing of the stainless steel corrosion-resistant diaphragm pressure gauge are all made of stainless steel, which has strong corrosion resistance. Mainly used for measuring small pressures of gases and liquids in the chemical, petroleum, and textile industries, especially suitable for measuring small pressures of highly corrosive and viscous media (non solidifying and non crystalline).

The shock resistant diaphragm pressure gauge is filled with damping fluid and a supporting buffer device, which has good shock resistance performance. In situations where the pressure of the measured medium undergoes strong pulse changes or pressure shocks, and where there is frequent sudden unloading in the production process, as well as in places with large environmental vibrations, shock resistant diaphragm pressure gauges can stably measure.

The corrosion-resistant and shockproof diaphragm pressure gauge combines the characteristics of both corrosion-resistant and shockproof diaphragm pressure gauges.

Structure principle of diaphragm pressure gauge:

The instrument consists of a measuring system (including flange joints, corrugated diaphragms), a transmission indicator mechanism (including connecting rods, gear transmission mechanisms, pointers, and dials), and a housing (including a case and cover ring). The instrument casing is a splash proof structure with good tightness, which can protect its internal mechanism from contamination.

The working principle of the instrument is based on the deformation of the elastic element (diaphragm on the measurement system). Under the pressure of the measured medium, the diaphragm is forced to undergo corresponding elastic deformation displacement, which is amplified by the transmission mechanism through the connecting rod group. The measured value is indicated on the dial by a pointer fixed on the gear.

Specification

Relative humidity not exceeding 90%

Temperature effect: When the temperature deviates by 20 ± 5 ℃, the additional temperature error shall not exceed 0.04%/℃

Shell protection level: IP64

Scale range, external dimensions, and weight

model	scale range	Pressure bearing part dimension D1	Case outer diameter D	Weight kg
YPF-100A	0~0.06, 0~0.1, 0~0.16, 0~0.25, 0~0.4 0~0.6, 0~1, 0~1.6, 0~2.5, -0.1~0 -0.1~0.06, -0.1~0.15, -0.1~0.3, -0.1~0.5 -0.1~0.9、-0.1~1.5、-0.1~2.4MPa	φ85	φ100	1.6
YPF-100B YPF-100B-F	φ115
YPF-150A	φ85	φ150	1.8
YPF-150B YPF-150B-F	φ115
YPF-100B YPF-100B-F	0~1.6, 0~2.5, 0~4, 0~6, 0~10 0~16, 0~25, 0~40* -1.6~0, -2.5~0,~4-0, -6~0, -10~0 -16~0, -25~0, -40~0* -0.8~0.8, -1.2~1.2, -2~2, -3~3, -5~5 -8~8、-12~12、-20~20*KPa	φ160	φ100	2.9
YPF-150B YPF-150B-F	φ160	φ150	3.2

*0~40, -40~0 ± 20KPa specifications, pressure bearing part size D, 1 is diameter 85.

Advantages and disadvantages

Advantages: 1. Good overload performance; 2. Linear; 3. Suitable for measuring absolute pressure and differential pressure; 4. Small size and moderate price; 5. Can be used for measuring viscosity and slurry.

Disadvantages: 1. Poor seismic and impact resistance performance; 2. Difficulty in maintenance; 3. The measurement pressure is relatively low.

verification

Verification equipment

1. Requirements for standard equipment

The maximum allowable absolute error of the standard should not exceed 1/4 of the maximum allowable absolute error of the diaphragm pressure gauge.

2. Selection and Verification Device for Diaphragm Pressure Gauge

You can choose between a pressure calibrator or a vacuum calibrator.

Verification items

Indication error, return error, tapping displacement, and pointer deflection stability.

Verification method

1. The method for verifying indication error is to calibrate the indication of a pressure gauge according to the division line marked with numbers. During calibration, gradually and steadily increase (or decrease) the pressure. When the indication reaches the upper limit of detection, cut off the pressure source, withstand the pressure for 3 minutes, and then smoothly decrease (or increase) the pressure according to the original calibration point in reverse order.

2. Return error: When checking the same point, the absolute value of the allowable error during the boost (or buck) and buck (or boost) checks shall comply with the regulations.

3. Lightly tap the displacement, and for each point of calibration, during the boost (or buck) and buck (or boost) calibration, the indication change caused by the lightweight case shall not exceed 1/2 of the specified allowable error absolute value.

4. Indication error: For each calibration point, the difference between the front and rear indications of the lightweight watch case and the indication of the standard instrument should meet the requirements during the boost (or buck) and buck (or boost) calibration.

Selection of temperature coefficient

When using the formula △=± (δ+k △ t), for the metal film, the temperature coefficient k is taken as 0.04%/℃; For film with coating layer, the temperature coefficient k is 0.06%/℃