Overview of intelligent electric two seat control valve;
ZAZN type electric two seat control valve, accept the DC current signal from the regulator, changing the flow rate of the medium, so that the process parameters are kept at a given value. Widely used in electric power, metallurgy, chemical industry, petroleum, textile, pharmaceutical, paper and other industrial production automation control.
Nominal diameter of this series of products from 20 to 200mm, nominal pressure of 1, 1.6, 4, 6.4MPa, the use of the temperature range from -250 to 20mA.DC C / C, to accept the signal of 0 ~ 10mA.DC or 4 ~ ~. Electric two seat control valve for large pressure difference occasions. According to the valve seal part of the material and metal - metal and non-metallic - metal seal two, the latter closed when the leakage rate can reach the level of 6 (zero leakage) standard. According to the different packing can be divided into two kinds of general packing seal and bellows seal, the former for general occasions, while the latter is not allowed for special occasions, the flow characteristics are linear or equal percentage. With different actuators can be divided into two types of ordinary and electronic. Variety of specifications available.
Product features:
According to the principle of fluid mechanics design of the section of the low flow resistance flow channel, the rated flow coefficient increased by 30%.
Adjustable range, the inherent adjustable ratio of 50, the flow characteristics are linear and equal percentage.
Electric double seat control valve is small, the valve stability is good, the use of large pressure difference.
Regulation cut off the use of soft sealing structure of the valve core, up to the level of leakage standards (zero leakage).
Servo amplifier with depth of dynamic negative feedback, can improve the accuracy of automatic adjustment.
Electric operator has a variety of forms, can be applied to 4 ~ 20mA.DC or 0 ~ 10mA.DC.
Electronic control valve can be directly controlled by the current signal valve opening, no servo amplifier.
Bellows seal type valve for the formation of a complete seal of the valve stem, plug fluid leakage.
Main technical parameters:
| Nominal diameter DN (mm) |
25 |
32 |
40 |
50 |
65 |
80 |
100 |
125 |
150 |
200 |
| Rated flow coefficient Kv |
straight line |
12.1 |
10.4 |
30.3 |
48.3 |
75.9 |
121 |
193.6 |
302.5 |
484 |
759 |
| Equal percentage |
11 |
17.6 |
27.5 |
44 |
69.3 |
110 |
176 |
275 |
440 |
693 |
| Rated stroke (mm) |
16 |
25 |
40 |
60 |
| Nominal pressure（MPa） |
1.01.64.06.4 |
| Inherent flow characteristics |
Linear and equal percentage |
| Inherent adjustable ratio |
50 |
| Allowable leakage |
Hard seal: II, IV soft seal: VI |
| working temperaturet(℃) |
-250～-60-20～200-40～250-40～450-60～450 |
| Signal range(mA.DC) |
0～104～20 |
| Action mode |
Electric open type |
| Ambient temperature(℃) |
Electric regulating valve：-20～70Servo amplifier：0～50 |
| Ambient humidity |
Electric regulating valve：≤95％Servo amplifier：≤85％ |
| supply voltage |
220V . AC 50HZ380V . AC 50HZ |
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