ZDLSY Electric Steam Trap Regulating Valve
I. Introduction:
ZDLSY Electric Steam Trapping Special Control Valve is a new generation of steam trap designed and manufactured based on the steam trapping requirements of thermal power plant equipment. It consists of two parts: an electric actuator and an angle-type valve body. The internal structure has no dead corners. The valve core and valve seat are made of integral hard alloy, with advantages such as internal leakage ≤Class VI and high flow characteristic accuracy. The product adopts a nearly linear valve core design, reduces flow resistance, applies a two-stage throttling principle, reduces erosion, and extends service life. Powered by an electric actuator, it receives0-10mA or4-20mA DC signals according to the controlled parameters of the control system, automatically adjusts the valve opening, and achieves continuous regulation of process parameters such as pressure, flow rate, and liquid level of the fluid in the pipeline. It can receive remoteDCS signals. The product features sensitive operation and precise signal transmission, and is widely used in industrial automation control systems such as electric power, metallurgy, chemical industry, light textile, etc., gaining extensive applications in the industrial field.
II. Parts Materials:
Valve body, valve cover: HT200, ZG230~450, ZG1Cr18Ni9Ti
Valve core, valve: 1Cr18Ni9Ti, stellite alloy hardfacing
Stuffing: polytetrafluoroethylene, flexible graphite, stainless steel bellows
Push rod, bushing: 2Cr13
III. Application:
It is composed of the 381L series electronic electric actuator and a three-way regulating mechanism. The electric actuator has a built-in servo system, eliminating the need for an additional servo amplifier. It can control operation with only an input signal and power supply, featuring simple wiring. The regulating mechanism has two operation modes: converging and diverging. In some occasions, it can replace two two-way valves and one three-way nozzle, thus being widely applied. It is commonly used in two-phase regulation of heat exchangers and simple ratio regulation.
IV. Technical Parameters:
Nominal Diameter DN | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 |
Flow Coefficient | 5 | 8 | 12 | 17 | 29 | 43 | 70 | 110 |
Rated Stroke (mm) | 16 | 25 | 40 | |||||
Nominal Pressure PN | 150LB (2.0MPa) -- 1500LB (25.0MPa) | |||||||
Working Temperature | -445 | |||||||
Signal Range | 4-20mADC, 200VAC, 380VAC | |||||||
Power Supply | 220VAC 50HZ, 380VAC 50HZ, 60HZ | |||||||
Allowable Leakage | Approximately zero leakage | |||||||
Sensitivity | (0.5-5%) F.S | |||||||
| Machinery & Equipment/Valves/Control Valves | |
