Wenzhou Starry Valve Co., Ltd. is one of the most reliable manufacturers and suppliers of electric globe valve in China. We are committed to providing high quality customized valves with low price. If you're going to buy bulk durable electric globe valve, welcome to get quotation from our factory.
Electric globe valve consists of a globe-valve body and linear-stroke electric actuator. It converts electrical signals into linear stem movement to achieve remote on-off or modulating control for process pipelines, electric globe valve widely used in automated industrial systems. Two main versions are available: on-off type for full-open / full-close service, and modulating type for continuous flow, pressure, temperature or level regulation via 4-20 mA / 1-5 VDC analog input signalCOVNA.
Structure & Working Principle
The electric actuator drives the valve stem and plug to perform linear travel.
- For on-off service: plug seats tightly against seat for shut-off or lifts fully open for full flow.
- For modulating service: plug stays at intermediate positions to throttle fluid flow according to control signal.
- Manual override handwheel is commonly equipped for emergency local operation upon power loss.
- Optional bellows-seal bonnet variant eliminates stem packing leakage for toxic, volatile or VOC-critical services.
- Seat faces are hard-faced with Stellite alloy for high-pressure / high-temperature wear-resistance. Soft-seat options (PTFE / graphite) are available for tight shut-off requirements.
Technical Specifications
| Pressure Class | Class 150 ~ 900 LB |
| Size Range | NPS 1/2" ~ NPS 12" (DN15-DN300) |
| Temperature Range | -196 ℃ ~ +650 ℃, subject to body, trim and actuator material |
| Body Materials | WCB carbon steel, LCB low-temperature steel, CF8 / CF8M stainless steel, WC6 / WC9 Cr-Mo steel, duplex steel and special alloys |
| Actuator Options |
• On-off actuator: open-close control, position feedback contacts; protection class IP65, optional Ex-proof version • Intelligent modulating actuator: accepts 4-20 mA / 1-5 VDC signal, high-precision positioning, HART / fieldbus communication available |
| Power supply | AC 220V, AC 380V or DC 24V |
| Optional feature | bellows-seal bonnet for zero stem-emission service |
Key Advantages
1.No compressed-air source required; powered by electricity only, easy integration with DCS / PLC automation systems.
2.Dual-function capability: tight shut-off for isolation, plus precise throttling for flow regulation.
3.Remote automatic control; manual handwheel for local emergency operation.
4.Modular actuator design; explosion-proof versions available for hazardous oil-gas and petrochemical zones.
5.Bellows-seal bonnet option meets strict low-VOC emission requirements for toxic-media applications.
Limitations
1.Longer actuation time compared with pneumatic actuated valves.
2.Not suitable for heavy particle-laden media which may erode plug-seat sealing pairs.
3.Bellows-seal version has finite fatigue cycle life for frequent cycling service.
Suitable Media & Typical Applications
Media
Steam, thermal oil, water, compressed air, hydrocarbon oil & gas, corrosive chemical fluids, toxic volatile fluids.
Industries
Oil & gas, petrochemical, refinery, power plant, chemical, pharmaceutical, energy-saving HVAC and overseas EPC projects.
Remark: Compared with bellow-seal globe valve, electric globe valve can be configured with standard packing-gland or bellows-seal bonnet according to leakage-control requirements.
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