Emergency pressure relief valve

Security

● Meet ISO28300 requirements

● Do not use breathing manholes (breathing manholes are not included in ISO 28300

because of the safety hazard of breathing air)

● A traffic graph certified by a third-party qualification agency

● Valve disc limit and anti-flight structure

● 100% strict factory inspection

Environmental Technology 

● ZETOP Emergency relief valve near zero leakage technology

High sensitivity, low overpressure value 10% airfoil disc patented technology

Built-in type 0 ring self-sealing technology

Split stainless steel seat technology

Standard flange (flange thickness not less than PN16)

● Technology approved by the Ministry of Ecology and Environment

Comply with VOCs emission control policies for storage tanks

When the tank is at rest without pressure relief, the leakage is satisfied

GB37822 Appendix A Requirements for a special emission limit of 20mg/m³

● Implement the European standard for emergency pressure relief valve leakage

Stricter than API2000/ISO28300

Test pressure ≥85% set pressure

The maximum allowable leakage value is 0.0045m³/h