Witt Gas Techniques has enhanced its range of gas safety relief valves by introducing the new SV809 and SV810 models to vent excess gas pressures up to 100bar in storage tanks, receivers, vessels, pipelines and other gas storage systems used in a wide variety of industries. The new models are suitable for all pressure levels between 45bar and 100bar covering a wide range of gases. The SV810 model also has manual venting so that the safety function can be checked after the valve has been fitted. The opening pressure for each valve can be set by Witt Gas engineers to meet on-site requirements. The valves are available in either brass or stainless steel and can be fitted in any orientation. An adapter for connecting the safety valve to a ventilation pipe is also available The operational temperature range for these valves is from -196C to approx +150C. They can be supplied with a range of inlet connections, with or without a condensation outlet and a protective dust cap.