Groth Corporation”s 1700A Series pressure/vacuum relief valves and the new 1800A Series full lift-type valves are fully compliant with the requirements of the ATEX Directive. Any company designing, manufacturing, or selling non-electrical equipment intended for use in environments which are potentially explosive due to flammable vapor hazards and protective systems must comply with the ATEX Directive 94/9/EC. Compliance with the ATEX Directive is a legal requirement in all European Union Member States. The 1700A valves are designed with inlet and outlet flanges of the same size to reduce installation costs by requiring smaller downstream piping. The 1800A is a relief valve capable of full stable lift at only 10 percent overpressure. This new valve is a modulating valve offering near-zero blowdown and reseats at near set pressure.