The main control valve product names of China Control Valve Network include:Electric-pneumatic valve locator,Electric slide valve,Electric small signle seat, sleeve control valve,Electric straight signle and double seat control valve,Electric Tee confluence, shunt control valve

1. Self-Operated Flow Balance Valve (Constant Flow Control)The Self-operated Flow Balance Valve is designed for constant flow systems.

1.1 Working Principle: It maintains a pre-set flow rate by sensing the pressure difference across its internal manual throttle. If the system pressure increases, the main valve plug closes proportionally to stabilize the flow.

1.2 Critical Limitations: 1. Minimum Pressure Drop: Requires at least 20kPa to operate.2. Placement Constraints: Should not be installed at the "most unfavorable loop" (the end of the network). Ideally suited for loops within 80% of the heating radius.1.3 Installation Tip: For low-elevation buildings, install on the supply pipe to protect radiators from overpressure; for high-elevation buildings, install on the return pipe to prevent system emptying.

2. Self-Operated Differential Pressure Control Valve (DPCV)With the rise of heat metering and variable flow systems, the Differential Pressure Control Valve (DPCV) is becoming the industry standard.

2.1 Advanced Pressure Regulation: DPCV ensures the pressure difference between the supply and return emains constant, regardless of network fluctuations or internal resistance changes (e.g., closing a branch).

2.2 Key Features & Compatibility:VFD Support: Perfectly aligns with variable frequency drive (VFD) pumps and "User-Active Variable Flow" modes.TRV Coordination: Works seamlessly with Thermostatic Radiator Valves (TRV).Surplus Head Absorption: Eliminates noise and interference between different users by absorbing excess pressure.

3. Conclusion: Choosing the Right Valve for Heat MeteringFor modern systems moving towards individual heat metering, Self-operated Differential Pressure Control Valves are highly recommended. They prevent the need for future retrofitting and provide superior stability in variable load conditions.

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

• Pneumatic diaphragm control valve
• Pneumatic diaphragm signle seat, sleeve control valve
• Pneumatic diaphragm tee confluence,shunt control valve
• Pneumatic fluorine lined cutting off(regulative)butterfly valve
• Pneumatic fluorine lined control valve
• Pneumatic lock valve
• Pneumatic piston adjustable butterfly valve

2026-03-26

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