Barrier valve bodies are made in two material versions: carbon steel (1.0570 – ZWZ 11 and ZWZ 12) and acid-resistant steel (1.4571 – ZWZ 11). In valves, the body with a throttle is made of forged material. The internal parts of the carbon steel stop valves are made of stainless steel and the acid-resistant valves are made of acid-resistant steel, with the exception of the tempered stainless steel needle. Corrosion-prone parts have suitable protective coatings. Ball ends of valves and connection pipes are suitable for welding with pressure pipe Ø12 x 2 mm (ZWZ 11) and Ø16 x 3 mm (ZWZ 12). The barrier valves are equipped with an ergonomic, sheet-metal pressed knob for quick valve operation.