Product Description
High-performance pressure sustaining/relief valve is designed for overpressure protection and upstream pressure stabilization in water supply, HVAC, and industrial pipeline systems. It combines dual functions:
- Pressure relief: Discharges excess pressure when upstream pressure exceeds the set value.
- Pressure sustaining: Maintains a stable upstream pressure by modulating flow.
Key Features
- Precision Control
- Opening pressure: Set value +0.2 bar (adjustable).
- Fast response: Opens in <0.5 seconds to prevent system damage.
- Tight sealing: Closes drip-tight at -1 bar below the set pressure.
- Robust Design
- Materials:
- Body: Ductile iron (QT500-7), Stainless steel (SUS304/316), Duplex (SAF2205), or Bronze.
- Ductile iron /Stainless steel /Duplex/Bronze
- Seals: EPDM, NBR, or HNBR (resistant to wear/corrosion).
- Anti-cavitation: Optimized seat design to minimize noise and erosion.
- Wide Compatibility
- Sizes: DN40-DN1200 (1.5"-48").
- Pressure ratings: PN10/16/25/40, ANSI Class 150/300.
- Temperature range:
- Water: 0°C to 70°C.
- Fuel: -40°C to 70°C.



Applications
- Water distribution: Protects pumps and pipelines from water hammer and overpressure.
- HVAC systems: Maintains stable pressure in heating/cooling circuits.
- Industrial processes: Safeguards equipment in fuel, seawater, and chemical pipelines.
- Municipal projects: Used in reservoirs, water towers, and irrigation networks.
Technical Specifications
Parameter |
Details |
Control Accuracy |
±5% of set pressure |
Flow Capacity |
Up to 10,000 m³/h (varies by DN size; see page 6-7 for head loss curves). |
Connection Types |
Flanged (EN 1092-2, ANSI, JIS) or threaded. |
Actuation |
Self-acting (no external power required). |
Optional Features |
Anti-cavitation cage, position indicator, electric remote control. |
Company Profile

Packaging & Shipping


FAQ
1. What is your term of payment?
A: 30% advance payment, 70% to be paid before delivery after goods are ready.
2. How about your delivery time?
A: Delivery Lead Time: Standard shipment within 30 days. Exact delivery date will be confirmed based on order quantity and specific requirements.
3. Can you produce products with my own brand?
A: Yes, we can offer OEM services.