Low pressure vents cover a set pressure range starting at 2 mbar (0.79″ WC) up to approx. 200 mbar (2.9 psi), conventional safety valves are designed for pressure higher than 0,2 bar (79″ WC) as per ISO standard. Even low pressure vents must be able to achieve a leakage rate according to DIN 3230 standard. In order to reduce emissions, especially nitrogen losses, vents have to comply with these accepted leakage rates and this has to be realized economically.
The PROTEGO® low pressure vents have up to ten times lower leakage rates (up to 50 times lower for 8″ sizes and larger) than as required by API (American Petroleum Institute) and EPA (Environmental Protection Agency) standards and are state of the art technology.
The atmospheric deflagration-proof VD/TS type PROTEGO® valve (available with CMS Pumps) is a highly developed combined pressure/vacuum relief valve for high flow capacities with an integrated flame arrester unit. It is primarily used as a safety device for flame transmission proof in- and out-breathing on tanks. containers and process engineering apparatus.
The valve offers reliable protection against excess pressure and vacuum, prevents the inbreathing of air and product losses almost up to the set pressure and also protects against atmospheric deflagration.
Pressure/Vacuum Relief Valve atmospheric deflagration-proof
Features and Advantages
- Requires only 10% over pressure to full lift
- Extreme tightness and hence least possible product losses and reduced environmental pollution
- Through 10% technology higher set pressures can be used which results in product loss reduction compared to conventional 40% and 100% over pressure technology vents (compare API 2000)
- The valve disc is guided within the housing to protect against harsh weather conditions
- It can be used as protective system according ATEX in areas subject to explosion hazards
- Optimized flow performance, maintenance friendly within a sturdy housing design using superior technology for API tanks