Series 4400: Balance Bellows Type

Series  4400 spring loaded safety relief valves have been designed according to API 520 and ASME Section VIII. The range of size and rating for these series are according to API 526 from 1 D 2 up to 8 T 10 from Class 150# up to Class 2500#.  Also, high pressure design for large orifices Q, R and T are available acc. to costumer's request. Series 4500 has been designed according to ASME SEC I for steam drum, superheater, economizer and other power plants applications

VIRCO 4400 Series safety relief valves present the simple safe solution for heavy duty applications, such as crude oil extraction, transportation and processing in


Petrochemical Industries

Oil and Gas- Onshore and offshore

Vessels and piping systems

Blow-down systems

Storage Tanks

Power plants