OKE Electric Double-Seat Control ValveOverview

The electric double-seat control valve is an automated control component that integrates an electric actuator and a control valve, primarily used for the automatic regulation of parameters such as flow, pressure, temperature, and liquid level in industrial processes. Due to its structural characteristics, this valve performs excellently in applications involving high flow rates, high pressure drops, and low leakage, making it particularly suitable for industries requiring precise control of process parameters, such as petroleum, chemical, power, and metallurgy.

Working Principle of Electric Double-Seat Control Valve

The core of the electric double-seat control valve lies in its electric actuator, which converts electrical energy into mechanical energy to drive the valve stem in linear motion, thereby controlling the lifting of the valve disc to regulate the medium flow. The electric actuator typically includes a servo amplifier, capable of receiving standard electrical signals (e.g., 4-20mA) and adjusting the valve opening based on signal variations.

OKE Electric Double-Seat Control ValveFeatures

1. The valve body is designed with an equal cross-section, low flow resistance channel based on fluid dynamics principles, increasing the rated flow coefficient by 30%.

2. Wide adjustable range with an inherent adjustable ratio of 50; flow characteristics include linear and equal percentage.

3. The electric sleeve control valve plug features upper and lower pressure equalization holes, resulting in low unbalanced force, excellent valve stability, strong sleeve interchangeability, and suitability for high differential pressure applications.

4. The regulating shut-off type uses a soft sealing structure for the valve core, achieving Class VI leakage standards (zero leakage).

5. The servo amplifier employs dynamic negative feedback to enhance automatic regulation accuracy.

6. Various types of electric operators are available, compatible with 4~20mA.DC or 0~10mA.DC signals.

7. The electronic electric control valve can directly control the valve opening via current signals without requiring a servo amplifier.

8. The bellows-sealed control valve provides complete sealing for the moving valve stem.

OKE Electric Double-Seat Control ValveSelection Method

When selecting an electric double-seat control valve, factors such as process requirements, key technical parameters, material, and corrosion resistance must be comprehensively considered. For instance, a single-seat control valve may be chosen for applications requiring high flow regulation, while a cage-type control valve is suitable for high-precision control scenarios. Additionally, the properties and corrosiveness of the fluid medium should be evaluated to select appropriate materials, ensuring long service life of the valve.

OKE Electric Double-Seat Control ValveInstallation Steps

Installation steps for the electric double-seat control valve include preliminary preparation, installation, connection to the control system, attachment installation, debugging, and testing. Proper installation is crucial to ensure normal operation and safe functioning of the valve. During installation, attention should be paid to the valve opening, leakage conditions, and the operation of the electric actuator, along with necessary cleaning and maintenance.

OKE Electric Double-Seat Control ValveUsage and Maintenance

During use, the electric double-seat control valve requires regular inspection, cleaning, and maintenance to ensure proper operation and longevity. Particularly in environments with corrosive media, valve maintenance should be intensified to prevent performance degradation or failure due to corrosion.

OKE Electric Double-Seat Control ValveSummary

With its unique advantages, the electric double-seat control valve plays a vital role in industrial automation control systems. From selection and installation to daily use and maintenance, every step must strictly adhere to relevant standards and requirements to ensure stable and reliable performance under various working conditions. As technology continues to advance, the application scope and performance of electric double-seat control valves will further expand and improve.

OKE Electric Double-Seat Control ValveDetailed Parameters

Diameter: DN15～300mm

Pressure: PN1.0～PN42MPa

Operating Temperature: -30～+425°C

Applicable Media: Water, oil, gas, etc.

Connection Method: Flanged or welded

Valve Body Material: WCB, 304, 316

Valve Stem Material: 304, 316

Sealing Material: PTFE packing, 304, 316

Product Brand: American OKE (OKE)