Diaphragm pressure gauge can be used to measure strong corrosion, high temperature, high viscosity, easy crystallization, easy solidification, solid floating medium pressure and to avoid the measurement medium directly into the general pressure instrument and prevent sediment accumulation and easy to clean the occasion, should be used by diaphragm isolator and general pressure instrument composed of a system diaphragm table.

Diaphragm pressure gauge is mainly used for measuring fluid medium pressure in the production process of petrochemical, alkali, chemical fiber, dyeing, pharmaceutical, food and cooling industry. Structure principle When the pressure P of the measuring medium acts on the diaphragm, the diaphragm will deform, and the sealing liquid of the pressure measuring system of the pressure instrument will be compressed to form the pressure P-△P. When the rigidity of the diaphragm is small enough, then △P is also small, and the pressure formed by the pressure gauge system is close to the pressure of the measuring medium.

Two, diaphragm pressure gauge main technical indicators

Temperature characteristic

Because the diaphragm pressure gauge system is filled with sealing liquid as the medium to transfer pressure, the temperature expansion coefficient of the sealing liquid, so that the pressure instrument with the pressure part of the temperature increase and the value is also increased, the temperature influence and sealing liquid expansion coefficient, diaphragm stiffness and pressure part temperature, especially for the low range of the pressure instrument, the influence is more obvious. General pressure part temperature error is not more than 0.1% /℃. Therefore, the total temperature influence of diaphragm pressure instrument is generally composed of the sum of the temperature influence of the universal instrument and the temperature influence of the pressure part of the diaphragm device.

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 polytetrafluoroethylene sheet

4: internal filling working liquid (1) silicone oil (2) Fill according to customer requirements

5: Working conditions

(1) Temperature Ambient temperature -20 ~+ [1] 55℃ Temperature of the measured medium -20 ~+55℃

(2) Working pressure static load: used to measure the upper limit value of 3/4

Alternating load: up to 2/3 of the measured upper limit

Short-time pressure: up to the measured upper limit

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 welded Steel Flange"

C: The company's flange standard

D: Customized according to user requirements

7: Knowledge instrument outside diameter (φ75mm) φ100mm

8: Model and form Product model connection form range of use

YTP-75S threaded connection is used to measure the pressure of highly corrosive media. Such as: chlorine gas, hydrochloric acid, nitric acid, etc.

Same as above for YTP-100S threaded connection

YTP-75SF flange connection is used for corrosive, viscous, easy to crystallize media pressure

YTP-100SF flange connection as above