Our DI Pressure Relief Valves are precision-engineered safety devices designed to automatically protect pipelines, pumps, and critical equipment from dangerous pressure surges and ...

Our DI Pressure Relief Valves are precision-engineered safety devices designed to automatically protect pipelines, pumps, and critical equipment from dangerous pressure surges and overpressure conditions. These pilot-operated valves feature proportional opening in response to pressure spikes and smooth closing when normal conditions restore, ensuring system stability and operational safety. Constructed from high-grade GGG50 ductile iron with reinforced EPDM diaphragms and corrosion-resistant internal components, they deliver long-lasting, maintenance-free performance. The fusion-bonded epoxy coating provides superior resistance to soil and water corrosion, while the factory-set or field-adjustable pilot system guarantees precise pressure regulation across various operating conditions from 1 to 16 bar.

These pressure relief valves find extensive application across multiple industries where pressure management is critical for safety and operational efficiency. In water distribution networks, they protect DMA zones and prevent pipeline damage during pressure fluctuations. Municipal water treatment plants utilize them for reservoir protection and pumping station safety. Industrial sectors including manufacturing, chemical processing, and power generation rely on these valves for cooling systems, process pipelines, and equipment protection. Fire protection systems incorporate them to maintain pressure integrity in sprinkler networks, while commercial buildings use them for HVAC and plumbing system safety across diverse operational environments.

The business value of these DI Pressure Relief Valves extends beyond basic functionality to deliver tangible operational advantages and cost savings. Their maintenance-free design reduces downtime and service interruptions, while the durable construction minimizes replacement costs and extends equipment lifecycle. The adjustable pressure settings allow customization for specific operational requirements, providing flexibility across different applications. Reliability is ensured through rigorous hydraulic testing at 1.5 times PN for the body and 1.1 times PN for the seat, with diaphragm life expectancy exceeding five years under normal conditions. These valves represent a smart investment in infrastructure protection, preventing costly damage from pressure surges while ensuring continuous, safe operation of critical systems.

Key Features:
- Constructed from GGG50 ductile iron with fusion-bonded epoxy coating (≥250 µm)
- Reinforced EPDM diaphragm with adjustable set pressure range (1-16 bar)
- Comprehensive size range from DN50 to DN800 with PN10/PN16 flange ratings
- Operating temperature range from -10°C to +80°C for versatile applications
- Hydraulic tested body (1.5×PN) and seat (1.1×PN) ensuring reliability

Benefits:
- Prevents costly equipment damage and pipeline failures from pressure surges
- Maintenance-free operation reduces downtime and service costs significantly
- Drinking water safe construction with optional WRAS/NSF certifications available
- Long service life exceeding five years under normal operating conditions
- Customizable configurations for project-specific requirements and applications