New Blockbody POSV for high back pressure
POSV (pilot operated safety valves) only react to the pressure at the valve inlet and are not affected by the back pressure. The maximum back pressure of a POSV is 70% of the set pressure as standard. But what to do if the back pressure is higher?
To secure an injection system, a customer of LESER needed a POSV that could secure a process with 200 bar-g design back pressure at a set pressure of 207 bar-g. This is four times more than the standard API 526. LESER engineers solved this with a block body design that can withstand the high outlet pressure.
This is because the standard cast bodies are not designed for these high back pressures. In order to prove that the valve bodies manufactured for the first time comply with the regulations, tests were carried out on the LESER water test bench.
This approach expands the LESER POSV portfolio and makes it more flexible for different requirements.