Y-100ML/Y-100MF Diaphragm pressure gaugeDetailed product description：

Y-100ML, Y-100MF diaphragm pressure gauge

Instructions:

1、 Usage description:
In order to expand the range of use of various general-purpose pressure instruments, which can be used to measure the pressure of media with strong corrosion, high temperature, high viscosity, easy crystallization, easy solidification, and solid suspended matter, as well as for pressure detection in situations where certain measuring media cannot directly enter the general-purpose instrument and are easy to clean and prevent the accumulation of sediment, a diaphragm gauge composed of a diaphragm isolator and a general-purpose pressure instrument must be used as a system.
Diaphragm gauges are mainly used for pressure detection in the production processes of industrial sectors such as petroleum, chemical, pharmaceutical, food, and textile.

2、 System composition diagram:

3、 Structural principle:

The diaphragm pressure gauge consists of various universal pressure instruments and diaphragm isolators with different structures, forming a closed system filled with sealing fluid. When the pressure of the measured medium acts on the diaphragm, the diaphragm deforms and compresses the sealing liquid in the closed system. Due to the inherent properties of the sealing fluid, the elastic elements in the pressure instrument undergo corresponding elastic deformation displacement, and the pressure value is displayed by the indicator device. When the stiffness of the diaphragm is small enough, the pressure indicated by the pressure gauge is close to the pressure value of the measured medium.

4、 Main technical indicators:

○ Temperature characteristics of diaphragm meter
Due to the sealing liquid filling the system of the diaphragm meter as a medium for pressure transmission, the temperature effect of the diaphragm meter is related to the expansion coefficient of the sealing liquid, the stiffness of the diaphragm, and the temperature of the compressed part. The impact on low range pressure instruments is particularly evident. The temperature error of the general pressure part is not greater than 1.0%/℃, so the temperature effect of the diaphragm gauge is generally the sum of the temperature effect of the general pressure instrument and the temperature effect of the pressure part of the diaphragm isolator.
○ Level difference of diaphragm gauge
Especially for diaphragm gauges with flexible connecting pipes, the installation position of the diaphragm compression part and the universal pressure gauge is not on the same horizontal plane, which will result in the influence of liquid level difference △ P. More attention should be paid to accurate measurement.
○ Corrosion resistance of diaphragm gauge
The corrosion resistance of diaphragm meters can be ensured by selecting appropriate materials for the diaphragm, flange, and sealing gasket in contact with the measuring medium.
Diaphragm material: 0Cr17Ni12Mo2 (316); Monel alloy (Cu30Ni70); Hastelloy alloy (H276C); Tantalum (Ta) and fluoroplastic (F4).
Flange material: Stainless steel 0Cr17Ni12Mo2 (316); Stainless steel lined with fluoroplastic (316+F4).
Sealing gasket material: Nitrile rubber; Fluororubber; Silicone rubber and fluoroplastics.
○ Selection of diaphragm fluid
To ensure the reliability and safety of diaphragm meters, suitable sealing liquids should be selected according to different applications.

6、 Diaphragm device flange size:

1. Open convex flange

code name	Range upper limit value P (MPa)	Recommended flange standard code	Dimensions of protruding flange (Mm)							Size chart
			D	K	f	f	L	C	B
MF1	four	JIS-10/20K 50A	one hundred and fifty-five	one hundred and twenty	one hundred	three	nineteen	eighteen	fifty	Figure 1
	four	50-1.0/4.0HGJ46	one hundred and sixty	one hundred and twenty-five	one hundred	three	nineteen	eighteen	fifty
	four	ANSI-2B 150LB	one hundred and fifty-two	one hundred and twenty-one	ninety-two point one	three	nineteen	eighteen	2"
	four	ANSI-2B 300/100LB	one hundred and sixty-five	one hundred and twenty-seven	ninety-two point one	three	nineteen	eighteen	2"
	6~10	25-10.0 HGJ47	one hundred and twenty-five	eighty-nine	fifty point eight	seven	twenty	twenty	twenty-five	Figure 2
	6~10	25-10.0 HGJ47	one hundred and sixty-five	one hundred and twenty-seven	ninety-two point one	three point five	twenty	twenty-six	fifty
	16~25	20~25.0 HGJ53	one hundred and thirty	eighty-nine	forty-three	seven	twenty-two	twenty	twenty-five
MF	four	25-4.0 DIN	one hundred and fifteen	eighty-five	sixty-five	three	M12	twenty-six	twenty-five	Figure 3

*Can be manufactured according to the flange standard size provided or specified by the user




Attachment: Selection of Corrosion Resistant Materials for Isolation Diaphragm

corrosive medium	Corrosion resistant material
	Tin bronze (QSn6.5-0.4)	SUS316	Pure tantalum (Ta)	Monel (Ni70Cu30)	Ha Shi He (HC)	Polytetrafluoroethylene (F4)
Sulfuric acid (H2SO4)	V	△	○	V	V	V
Nitric acid (HNO3)	╳	V	○	╳	V	V
Hydrochloric acid (HCI)	△	╳	○	╳	V	V
Phosphoric acid (H3PO4)	V	V	○	V	V	V
Acetic acid (CH3COOH)	V	V	○	V	○	V
Caustic soda (NaOH)	△	○	△	○	○	V
Soda ash (Na2CO3)	○	○	○	○	V	V
Baking soda (NaHCO3)	V	○	○	○	○	V
Chlorine gas (CI)	Dry: V Wet: ╳	Dry: V Wet: ╳	○	Dry: V Wet: ╳	V	V
Bromine (Br2)	Dry: △ Wet: ╳	Gan: ╳ Wet: △	○	Dry: ○ Wet: ╳	○	V
Ammonia water (NH3)	╳	V	╳	╳	○	V
Seawater (30% NaCl)	V	V	○	○	○	V
Symbol description: ○ - Best; △ - Conditional use; V - can be used; ╳ - Cannot be used.

The general material used is SUS316-0Cr17Ni12m, and the above corrosion-resistant materials are selected at room temperature. For the selection of corrosion-resistant materials in special circumstances, please contact our company specifically.