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Stainless steel diaphragm pressure gauge (flange) diaphragm

DATE:2015-08-12 HITS:0

Processing customized	yes	brand	kerone	model	Y-100BFZ/MF
type	The diaphragm pressure gauge	specifications	0~1MPa,0~2.5MPa,0~4MPa,0~16MPa,0~25MPa,0~40MPa,Other specification can be customized

Purpose:

In order to enlarge the using range of all kinds of universal pressure gauge, can be suitable for measuring the corrosive, high temperature, high viscosity, easy to crystallization, easy to solidification and have solid suspended matter medium pressure, and for some measurement medium can not directly into the universal instrument and easy cleaning to prevent the pressure testing of the occasions where the precipitation, must adopt the diaphragm isolator with universal pressure gauge table to form a system of diaphragm.

Diaphgram gauge is mainly used in petroleum, chemical, pharmaceutical, food, textile and other industrial department the pressure test in the process of production.

Second, the system structure diagram:

Three, the structure principle:

Diaphragm pressure gauge by all sorts of general and different structure diaphragm type pressure gauge isolator to form a closed system, the sealing liquid filling. When the measured medium pressure acting on the diaphragm, diaphragm deformation, compression sealing fluid in a closed system. Due to the inherent nature of sealing fluid, make the elastic element of pressure gauge produces corresponding elastic deformation, displacement, by indicating device shows pressure value. When the enough stiffness of the diaphragm, pressure meter indicating pressure near the measured medium pressure value.

Four, the main technical indicators:

Temperature characteristic of diaphragm table

Because the diaphragm table filled the sealing liquid system as the pressure transmission medium, and the quantity of the diaphragm table temperature sealing liquid coefficient of expansion and compression of diaphragm stiffness and parts related to the temperature. For the influence of low range pressure meter is especially striking. General compression zone temperature error is not more than 1.0% / ℃, so the temperature of the diaphragm table is generally by the universal pressure gauge temperature affects measure and diaphragm separator compression zone temperature influence both combined.

Diaphragm table level difference

Four, the main technical indicators:

Especially for diaphragm table with soft connecting pipe, because the diaphragm compression zone and universal pressure gauge installation position is not in the same horizontal plane, will produce the effect of liquid level difference amount delta P. More attention should be paid to in precise measurement.

Diaphragm table of corrosion resistance

Diaphragm table of corrosion resistance can be suitable for the selection and measurement of media contact part of the diaphragm, the flange and the sealing gasket materials to ensure that.

Diaphragm material: 0 cr17ni12mo2 (316); Monel alloy (Cu30Ni70); Hartz alloy (H276C); Tantalum (Ta) and fluorine plastic (F4).

The flange material: stainless steel 0 cr17ni12mo2 (316); Stainless steel lined with fluoroplastic (316 + F4).

Nitrile rubber sealing gasket material:; Fluorine rubber; Silicone rubber and fluorine plastic.

The choice of diaphragm liquid

Reliability and safety guarantee diaphragm table is used, should choose appropriate sealing fluid according to different purposes.

Six, diaphragm device flange size:

1. Open the convex flange

Code name	The upper limit range P（MPa）	Recommend the flange standard code	Surface flange dimensions （Mm）							Size chart
Code name	The upper limit range P（MPa）	Recommend the flange standard code	D	K	f	f	L	C	B	Size chart
MF1	4	JIS-10/20K 50A	155	120	100	3	19	18	50	FIG. 1
	4	50-1.0/4.0HGJ46	160	125	100	3	19	18	50
	4	ANSI-2B 150LB	152	121	92.1	3	19	18	2"
	4	ANSI-2B 300/100LB	165	127	92.1	3	19	18	2"
	6~10	25-10.0 HGJ47	125	89	50.8	7	20	20	25	FIG.2
	6~10	25-10.0 HGJ47	165	127	92.1	3.5	20	26	50
	16~25	20~25.0 HGJ53	130	89	43	7	22	20	25
MF	4	25-4.0 DIN	115	85	65	3	M12	26	25	FIG. 3

*All can according to the user or the specified flange standard size manufacturing

The attachment, about the isolation diaphragm part corrosion resistant material choice

Corrosive medium	Corrosion resistant materials
Corrosive medium	Tin bronze （QSn6.5-0.4）	SUS316	Pure tantalum （Ta）	monel （Ni70Cu30）	Hartz close （HC）	teflon （F4）
Sulfuric acid （H2SO4）	V	△	○	V	V	V
Nitric acid （HNO3）	╳	V	○	╳	V	V
Hydrochloric acid （HCI）	△	╳	○	╳	V	V
phosphate （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 （CI）	dry ：V wet：╳	dry：V wet：╳	○	dry：V wet：╳	V	V
bromine （Br2）	dry：△ wet：╳	dry：╳ wet：△	○	dry：○ wet：╳	○	V
ammonia （NH3）	╳	V	╳	╳	○	V
The sea （30％ NaCI）	V	V	○	○	○	V
Symbols that：○——The best；△——Conditional use；V——You can use；╳——Don't use

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Stainless steel diaphragm pressure gauge (flange) diaphragm