The main control valve product names of China Control Valve Network include:YHR angle stroke electric actuator,ZAJQ electric adjustable control valve,ZAJV electronic type electric v-type regulating control valve,ZHJP（low temperature type）pneumatic single seat control valve,ZYH673 pneumatic knife gate valve,ZYHSY electronic control peumatic trap

1. The Critical Role of Control Valves in Power Generation

In the power industry—whether fueled by natural gas, coal, or nuclear energy—the water-steam cycle is the lifeline. Selecting control valves in this process is challenging due to extreme temperature and pressure fluctuations leading to flashing, cavitation, and erosion.

2. Boiler Feedwater Valves (Main/Auxiliary & Composite)

Function:Precise control of drum level and steam flow.

Technical Challenges:Startup pressure drops can reach 100-300 kg. Requires a high rangeability of 75:1 to 100:1.

Material Specification:Use WCB/WC9. For internals, 416 Stainless Steel is preferred over 316+Stellite due to potential reactions with hydrazine-treated water.

3. Minimum Flow Recirculation Valves

Severity:Highest pressure drop in the plant (160-350 kg).

Requirements:Anti-cavitation trim, anti-clogging design, and Class V sealing. Typically configured as Fail-Open.

4. Heater Drain Valves (High/Low Pressure)

Media:Saturated water.

Selection:Must resist flashing and erosion. Class V or VI shut-off is required to maintain thermal efficiency.

5. Desuperheaters and Bypass Valves (PRDS)

Requirement:High thermal shock resistance and rapid response. These valves provide a bypass for the turbine, allowing the boiler to operate independently.

Do you still need to know or purchase the following control valve products:

• Pneumatic piston fast cutting off valve
• Pneumatic tank bottom ragulator
• Pneumatic three eccentric butterfly valve(Fork cylinder)
• Pneumatic V-shaped adjustable control valve
• Pneumatic valve locator
• Proximity switch

2026-03-24

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