ZDLN Electronic Electric Double-seat Control Valve
Other Products
I. Introduction:
The ZDLN electronic electric double-seat control valve is composed of the 3610L series electronic electric actuator and the low-flow-resistance straight-through single-seat regulating mechanism. The electric actuator has a built-in servo system, eliminating the need for an external servo amplifier. It can be controlled to operate simply by inputting a signal and connecting to a power supply. It features small size, light weight, large flow rate, and high regulation accuracy. It is widely used in automatic control of industrial processes such as petroleum, chemical, metallurgy, and light industry. It is widely applied to precisely control process parameters of media like gas, liquid, and steam, such as pressure, flow, temperature, and liquid level, to maintain them at set values. It is a general control valve product that meets IEC standards. The double-seat valve has characteristics such as small unbalanced force, allowable large pressure difference, and large flow capacity. It is suitable for occasions with strict leakage requirements, large pressure differences, and clean media, and is widely used in industries such as electric power, metallurgy, chemical industry, petroleum, environmental protection, light industry, and equipment manufacturing.
II. Working Principle:
The ZDLN electronic electric double-seat control valve has a larger flow capacity than electric single-seat control valves of the same nominal diameter, because the double-seat control valve has two valve cores (upper and lower) on its valve seats. The medium flows in from the left side of the valve body, passes through the valve seats and valve cores, and flows out from the right side. Its flow capacity can be increased by 20% to 25% compared with single-seat valves. When the electric double-seat control valve is in use, the forces exerted by the medium on the upper and lower valve cores can cancel each other out, resulting in a small unbalanced force and a large operating pressure difference. However, since the upper and lower valve cores are not easy to close tightly at the same time, the leakage amount when closed is relatively large. But because of its strong flow capacity and allowable pressure difference larger than that of general control valves, it is suitable for occasions with requirements on leakage amount and large pressure differences.
III. Performance Indicators:
Performance Indicators | ||
Item | Indicator Value (with positioner) | |
Basic Error (%) | ±5.0 | |
Hysteresis (%) | 2.0 | |
Dead Band (%) | 3.0 | |
End Point Deviation (%) | ±2.5 | |
Rated Stroke Deviation (%) | ±2.5 | |
Leakage (1/h) | Single-seat Type | 10⁻⁴ × Rated Capacity of Valve |
Sleeve Type | 10⁻³ × Rated Capacity of Valve | |
IV. Main External Dimensions and Connection Sizes:
Nominal Diameter | L | H1 | H | H2 | D | H3 | |||||||||||
Normal Temperature | Medium Temperature | ||||||||||||||||
PN6 | PN16 | PN40 | PN64 | PN6 | PN16 | PN40 | PN64 | PN6 | PN16 | PN40 | PN64 | PN40 | PN64 | ||||
20 | 187 | 194 | 194 | 206 | 45 | 52.5 | 52.5 | 62.5 | 539 | 546.5 | 546.5 | 556.5 | 696.5 | 706.5 | 205 | 225 | 100 |
25 | 184 | 197 | 197 | 210 | 50 | 57.5 | 57.5 | 67.5 | 556 | 563.5 | 563.5 | 573.5 | 713.5 | 723.5 | 260 | 225 | 130 |
40 | 222 | 235 | 235 | 251 | 65 | 72.5 | 72.5 | 82.5 | 713 | 720.5 | 720.5 | 730.5 | 890.5 | 900.5 | 260 | 225 | 158 |
50 | 254 | 267 | 267 | 286 | 70 | 80 | 80 | 87.5 | 721 | 731 | 731 | 738.5 | 901 | 908.5 | 260 | 225 | 163 |
65 | 276 | 292 | 292 | 311 | 80 | 90 | 90 | 100 | 835 | 845 | 845 | 855 | 1025 | 1035 | 370 | 310 | 194 |
80 | 298 | 317 | 337 | 337 | 92.5 | 97.5 | 97.5 | 105 | 859.5 | 864.5 | 864.5 | 872 | 1044.5 | 1052 | 370 | 310 | 203 |
| Industry Category | Machinery & Equipment/Valves/Control Valves |
|---|---|
| Product Category | |
| Brand: | 上海舟腾 |
| Spec: | ZDLN |
| Stock: | 99 |
| Manufacturer: | 上海舟腾泵阀制造有限公司 |
| Origin: | 113120 |
