Pressure Sustaining Valve Pressure Relief Valve with Ductile Iron Body and Stainless-Steel Accessories

• Customization: Available
• Temperature: Ordinary Temperature
• Certification: ISO9001
• Model NO.: N500
• Media: Water
• Standard: Standard
• Connection Mode: Flange
• Power: Hydraulic
• Material: Stainless Steel
• Type: Self-Operated
• Pressure Rating: Pn10/16/25/40, ANSI Class 150/300
• Body Material Optional: Ductile Iron, Stainless Steel, Duplex, Bronze
• Seals: EPDM, NBR, or HNBR
• Transport Package: Wooden Case or Pallet
• Specification: DN40– DN1200
• Origin: Shanghai, China
• HS Code: 8481801090
• Production Capacity: 2000 PC Per Month

Product Description

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

1. 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.
2. 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.
3. 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.

Detailed Photos

 

 

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.