Electronic electric double-seat control valve
Other Products
I. Introduction:
The ZDLN electronic electric double-seat control valve consists of a 3610L series electronic electric actuator and a low-flow-resistance straight-through single-seat control mechanism (single-seat type). The electric actuator has a built-in servo system, so no additional servo amplifier is required. It can be controlled to operate simply by inputting a signal and connecting 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, metallurgical, and light industries. It is widely applied to precisely control process parameters of media such as gas, liquid, and steam, including pressure, flow, temperature, and liquid level, to maintain these parameters at specified 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 loose leakage requirements and clean media with large pressure differences, and is widely used in industries such as electric power, metallurgy, chemical, 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. This is 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 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 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 allowing a large operating pressure difference. However, since it is difficult for the upper and lower valve cores to close tightly at the same time, the leakage amount when closed is relatively large. Nevertheless, due to its strong flow capacity and the allowable pressure difference larger than that of general control valves, it is suitable for occasions with requirements for 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: | |
| Spec: | |
| Stock: | 99 |
| Origin: | 113120 |
