SELF-RELIANCETYPE DIFFERENTIALPRESSURE CONTROLVALVES
Product Model:ZYC
NominalDiameter:15-600mm
NominalPressure:1.6~6.4MPa
suitable temperature:0°C-100°C
Suitable Medium:Water
Self-Reliance Type Differential Pressure Control Valves
Product Model: ZYC
Product Overview
The ZYC Self-Reliance Differential Pressure Control Valve is designed to maintain a constant pressure differential across a system, ensuring stable operation in heating, cooling, and industrial fluid applications. It operates autonomously without external power, adjusting its opening based on pressure changes to balance flow and protect downstream equipment.
Key Features
- Self-Regulating Mechanism
- Adjusts valve opening automatically in response to pressure fluctuations, eliminating the need for external energy sources.
- Maintains a consistent pressure differential (ΔP) between inlet and outlet, even when system demand or supply pressure varies.
- High-Precision Control
- Features a spring-loaded diaphragm and valve stem assembly that senses pressure differences.
- Pressure differential settings can be adjusted via an external knob for flexible system integration.
- Robust Construction
- Materials: Valve body in ductile iron (GGG-40.3) or cast steel, with stainless steel springs and EPDM seals for durability.
- Design: Pressure-balanced design ensures reliable operation under high-pressure conditions (max working pressure ≥16 bar).
- Versatile Applications
- Ideal for HVAC systems, district heating networks, and industrial process control.
- Protects equipment such as chillers, heat exchangers, and pumps from overpressure or flow instability.
Technical Specifications
Parameter |
Details |
Nominal Diameter |
15-600 mm |
Nominal Pressure |
1.6-6.4 MPa |
Operating Temp. |
0°C-100°C (water) |
Media Compatibility |
Water, non-corrosive liquids |
Control Accuracy |
±8% of setpoint pressure differential |
Connection |
Flanged (GB/T17241 standard) or threaded |
Quality Standards & Certifications
- Certifications: ISO 9001, compliant with CJ/T383-2012 national building industry standards.
- Testing: Each valve undergoes rigorous testing for pressure resistance, leakage, and durability.
- Material Compliance: Meets international standards for valve body materials (e.g., ASTM, DIN).
Typical Applications
- District Heating Systems
- Maintains balanced pressure in high/low-zone heating networks to prevent overheating or pipe collapse.
- HVAC Systems
- Stabilizes flow in chilled water loops, protecting chillers during partial-load operation.
- Industrial Processes
- Ensures consistent pressure in boiler feedwater systems or chemical processing pipelines.
Installation Guidelines
- Orientation: Install in horizontal or vertical pipelines with flow direction matching the arrow on the valve body.
- Pressure Taps: Connect the pilot tube to the supply line (upstream) and ensure no obstructions.
- Maintenance: Regularly inspect the valve for leaks or blockages. Use the built-in (drain port) for winterizing.
Why Choose ZYC Valves?
- Energy Efficiency: Reduces pump energy consumption by stabilizing system pressure.
- Low Maintenance: Self-cleaning design minimizes clogging risks.
- Customizable: Available in fixed or adjustable ΔP settings to suit diverse system requirements.







