Size Range: DN40–DN800
Pressure Range: 1.0MPa-1.6MPa
End Connection: Flanged
Material: Ductile iron, stainless steel (internal components)
Seals: NBR/EPDM
Valve Design: Spring-loaded safety relief design
Face to Face: Compliant with EN558-1 standards
Testing & Inspection: ISO 5208 compliant
Suitable Medium: Water, air, and non-corrosive fluids
The Safety Relief Valve is specially designed to provide overpressure protection in fluid systems. Its pilot-operated spring-loaded mechanism ensures accurate and reliable pressure relief, maintaining system stability and safety. Constructed with durable materials, it guarantees long-lasting performance and minimal maintenance for industrial and municipal applications.
Provides efficient overpressure relief to safeguard fluid systems
Spring-loaded mechanism ensures precision pressure regulation
Corrosion-resistant materials enhance durability
Low-maintenance design for cost-effectiveness
Suitable for water, air, and other non-corrosive mediums
This valve mainly comes in two forms: diaphragm type and piston type. It consists of the main valve (5), pilot valve (2), regulating valve (4), filter (3), and pressure gauge (1), among other components.
It is used in circulating systems of high-rise buildings to act as a pressure relief device. When the system pressure exceeds the preset level, the valve quickly opens to relieve the excess pressure, preventing damage to pipelines and equipment. It ensures the system operates safely by maintaining pressure below a defined limit.
| Nominal Pressure PN | 1.0 MPa | 1.6 MPa | 2.5 MPa |
|---|---|---|---|
| Shell Test Pressure | 1.5 MPa | 2.4 MPa | 3.75 MPa |
| Sealing Test Pressure | 1.1 MPa | 1.76 MPa | 2.75 MPa |
| Outlet Pressure Adjustable P2 | 0 – 1.0 MPa | 0 – 1.6 MPa | 0 – 2.5 MPa |
| Working Temperature | ≤ 80°C | ||
| Applicable Medium | Water, oil | ||
| DN (mm) | L (mm) | H (mm) |
|---|---|---|
| 40 | 240 | 270 |
| 50 | 240 | 270 |
| 65 | 270 | 340 |
| 80 | 300 | 400 |
| 100 | 350 | 440 |
| 125 | 460 | 460 |
| 150 | 480 | 500 |
| 200 | 500 | 640 |
| 250 | 605 | 690 |
| 300 | 700 | 820 |
| 350 | 800 | 950 |
| 400 | 900 | 1150 |
| 500 | 1100 | 1550 |
| 600 | 1300 | 1600 |
| 700 | 1400 | 1750 |
| 800 | – | 1900 |
Flange connection standards:
PN1.0MPa and PN1.6MPa follow GB/T 17241.6–1998
PN2.5MPa follows GB/T 9113.1–2000
Municipal water supply networks
Industrial pipeline overpressure protection
HVAC systems in commercial and industrial facilities
Power plants and energy sectors
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