Ekaah provides check valves. These check valves are applicable for very stringent applications manufactured by weh gmbh, germany, turbines being one of them. For the turbines the materials are ss 1.4305. Spring is made of ss 1.4568. The pressure is 100 bar and the cracking pressure is 0.7 to 0.85 bar. Temperature is over 300Âșc and the seals are made of ffkm, an equivalent of kalrez suitable for benzene, diesel and natural gas. End fittings can be tailored to user`s requirement depending on the volume of the order.