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YMN60-1MPa

  • Category:YM Series Diaphragm Pressure Gauge
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  • Release time:2023-03-09 21:42:11
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Brief Description: Diaphragm pressure gauges are mainly used in the petroleum, chemical, chemical fiber, food, pharmaceutical and other industrial sectors to measure the pressure of media that are highly corrosive, high-temperature, highly viscous, prone to crystallization, solidification, and solid particles, as well as for pressure testing where some measuring media cannot directly enter general-purpose pressure instruments and prevent sediment accumulation and are easy to clean.


Diaphragm pressure gauges are mainly used in industries such as petroleum, chemical, chemical fiber, food, pharmaceutical, and other industries to measure the pressure of media with strong corrosion, high temperature, high viscosity, easy crystallization, easy solidification, and solid particles, as well as for pressure testing where some measuring media cannot directly enter general-purpose pressure instruments and prevent sediment accumulation and are easy to clean.


The diaphragm pressure gauge consists of three major parts: a general-purpose pressure gauge, a connector, and a diaphragm isolator (see the following composition diagram):


 Schematic Diagram of Diaphragm Pressure Gauge Composition

 Model representation


Structural principle


When the pressure of the measured medium acts on the isolation membrane, the membrane generates deformation and compresses the sealing fluid in the pressure measuring system of the pressure instrument, causing the elastic elements in the pressure instrument to generate corresponding elastic deformation. After transmission and amplification by the transmission structure, the pressure value is indicated on the dial by the indicating device.


Main technical characteristics


·Temperature characteristics of diaphragm pressure gauges


The total temperature influence of diaphragm pressure gauges is generally universal


Temperature influence amount of pressure instrument and pressure part temperature of diaphragm isolator


The sum of the degree influence quantities, as specified by the temperature error of the general pressure part


Not more than 0.1%/℃.


·Level difference of diaphragm pressure gauge


Especially for diaphragm pressure gauges with flexible connecting pipes, the installation position of the pressure part and the general-purpose pressure instrument is not on the same horizontal plane, which will produce the influence amount △ P of the liquid level difference as shown in the figure.

When the pressure of the measured medium acts on the isolation membrane, the membrane generates deformation and compresses the sealing fluid in the pressure measuring system of the pressure instrument, causing the elastic elements in the pressure instrument to generate corresponding elastic deformation. After transmission and amplification by the transmission structure, the pressure value is indicated on the dial by the indicating device.


Main technical characteristics


·Temperature characteristics of diaphragm pressure gauges


The total temperature influence of diaphragm pressure gauges is generally universal


Temperature influence amount of pressure instrument and pressure part temperature of diaphragm isolator


The sum of the degree influence quantities, as specified by the temperature error of the general pressure part


Not more than 0.1%/℃.


·Level difference of diaphragm pressure gauge


Especially for diaphragm pressure gauges with flexible connecting pipes, the installation position of the pressure part and the general-purpose pressure instrument is not on the same horizontal plane, which will produce the influence amount △ P of the liquid level difference as shown in the figure.


    ·Selection of sealing fluid


    To ensure the reliability and safety of diaphragm meters, appropriate sealing fluids should be selected according to different applications.


Sealing fluid
Pressure part temperature range
Specific gravity g/cm3
Body expansion series number 1/℃
use
High viscosity silicone oil
-1~200℃
1.07
0.95×10-3
For high temperature use
Low viscosity silicone oil
-30~100℃
0.94
1.08×10-3
General use
Glycerin aqueous solution
-5~100℃
1.27
0.61×10-3
For food
plant oil
-5~100℃
0.93
1.03×10-3
For food
Fluoro oil
-30~150℃
1.93
0.75×10-3
Hydrogen, oxygen

Diaphragm unit flange size


    1、Open Raised Face Flange

code name
Upper Range Value P (MPa)
Recommended flange standard code
Raised face flange size (mm)
Dimensional drawings
D
K
d
f
L
C
B
MF1
4
JIS-10/20K 50A
155
120
100
3
19
18
50
Figure 1
4
50-1.0/4.0 HGJ46
160
125
100
3
19
18
50
4
ANSI-2B 150Ib
152
121
92.1
3
19
18
2"
4
ANSI-2B 300/100Ib
165
127
92.1
3
19
18
2"
6-10
25-10.0 HGJ47
125
89
50.8
7
20
20
25
Figure 2
6-10
50-10.0 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
Figure 3


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


 Figure 3 (Upper Range Value ≤ 4MPa) [code MF]


    2、I-shaped raised face flange [code MG]

    Upper range value: ≤ 4MPa

Recommended flange standard code
measurement
DN
d1
K
d2
L
JSI-10/25K25A
25
125
90
70
19
JSI-10/20K20A
20
100
75
58
15
JSI-10/20K15A
15
95
70
52
15
ANSI-1B-150IB
1"
108
79.4
50.8
15.7
ANSI-1B-300/600Ib
1"
124
88.9
50.8
19.1
20-1.0/4.0/OHGJ47
20
105
75
56
14

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


  3、Threaded joint type [code ML]

    Upper range value: ≤ 60MPa

    4、Bolt type diaphragm isolator [code MZ]


Measuring range: 1~25MPa


Diaphragm and diaphragm seat material: OCr17Ni12Mo2 [316]

 

5. Clamp type diaphragm isolator [code MC]


6. Nut type diaphragm isolator [code MN]


7. Rectangular flange diaphragm isolator [code MH]


Note: Please refer to the special page of sanitary diaphragm pressure gauge for details of types 5, 6, and 7.


Connector overall dimension (unit: mm)





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