Diaphragm pressure gauge can be suitable for measuring the corrosive, high temperature, high viscosity, easy to crystallization, easy solidified, medium pressure and has a solid suspended matter should avoid directly into the universal pressure gauge measuring medium and prevent the sediment accumulation and easy to clean, shall be made on the diaphragm isolator with universal pressure gauge table to form a system of diaphragm.
Diaphragm pressure gauge is mainly used for measuring the pressure of fluid medium in the production process of petrochemical, alkali, chemical fiber, dyeing, pharmaceutical, food and cool industries. When the pressure P of the measuring medium acts on the diaphragm, the diaphragm deforms and compresses the sealing fluid of the pressure measuring system of the pressure instrument, so that the pressure of P-△P is formed. When the rigidity of the diaphragm is small enough, △P is also small, and the pressure formed by the pressure measuring system of the pressure instrument is close to the pressure of the measuring medium.
Two, diaphragm pressure gauge main technical indicators
Temperature characteristic
Because the diaphragm pressure gauge system by filling the sealing liquid as the transfer medium of stress, is due to the temperature of the sealing liquid volume expansion coefficient, the pressure gauge with compression zone temperature increased, the value for the temperature influence quantity and sealing liquid expansion coefficient, the diaphragm stiffness as well as the compression zone temperature related, especially for the low range of pressure gauge, the effect is more obvious. General compression part temperature error is not greater than 0.1% /℃. Therefore, the total temperature influence of diaphragm pressure instrument is generally the sum of the temperature influence of general instrument and the temperature influence of diaphragm pressure part.
1: Accuracy level 1.5
2: Measuring range (Mpa) 0~0.1 0~0.16 0~0.25 0~0.4 0~0.6(special specifications please indicate when ordering)
3: Diaphragm material PTFE sheet
4: Internal filling working fluid (1) silicone oil (2) according to customer requirements
5. Working conditions
(1) Temperature Ambient temperature -20 ~+ [1] 55℃ Measured medium temperature -20 ~+55℃
(2) Working pressure static load: use to 3/4 of the upper limit value of measurement
Alternating load: used to 2/3 of the upper limit of measurement
Short-term pressure: used to measure the upper limit
6: Connection size (1) Thread connection: M20*1.5(G3/8 "G1/2")
(2) Flange connection A: Ministry of Machinery Industry standard JB81-5 "Flat Welded Steel flange"
B: Ministry of Chemical Industry standard "Acid resistant Flat Welding Steel Flange"
C: Flange standard of our company
D: Customized according to user requirements
7: knowledge instrument diameter (φ75mm) φ100mm
8: Model and form Product model connection form range of use
Ytp-75s threaded connections are used to measure pressure in highly corrosive media. Such as: chlorine, hydrochloric acid, nitric acid and so on.
Ytp-100s screw connection as above
Ytp-75sf flange connection is used for corrosive, high viscosity, easy to crystallize medium pressure
Ytp-100sf flange connection as above
