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ZDLM electric fine small sleeve control valve
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ZDLM electric fine small sleeve control valve to accept the instrument to adjust the DC current signal to change the flow of the media is controlled, so that the control process parameters remain at a given value. Widely used in electric power, metallurgy, chemical, petroleum, textile, pharmaceutical, paper and other industrial sectors of the production automation control. This series of products from the nominal diameter of 20 to 300mm, nominal pressure of 1.6,4.0,6.4MPa, accept the signal 0 ~ 10mA.DC or 4 ~ 20mA.DC, the use of temperature range from -40 ℃ ~ 450 ℃. One electric single-seat control valve for smaller pressure, medium viscosity or slightly particulate impurities occasions; electric sleeve control valve for large pressure and leakage of large occasions.

The main technical parameters are as follows:


Nominal diameter DN (mm)
20
25
32
40
50
65
80
100
125
150
200
250
300
10
12
15
20
Rated flow coefficient Kv
straight line
1.8
2.8
4.4
6.9
11
17.6
27.5
44
69
110
176
275
440
690
1100
1760
Equal percentage
1.6
2.5
4
6.3
10
16
25
40
63
100
160
250
400
630
1000
1600
Rated stroke L (mm
10
16
25
40
60
100
Nominal pressure PN (MPa)
1.6, 4.0, 6.4
Inherent flow characteristics
Straight line, equal percentage
Inherently adjustable ratio R
50: 1
Allow leakage
Single seat
Hard seal: grade Ⅳ, soft seal: Ⅵ grade
Sleeve
Seal: Class II, soft seal: Ⅵ grade
Operating temperature t (℃)
-20 to 200, -40 to 250, -40 to 450, and 60 to 450
Signal range (mA.DC)
0 ~ 10,4 ~ 20
voltage
220V, 50Hz
Mode of action
Failure: all closed, fully open, self-locking bit


The relevant structure is as follows:

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