Wandfluh has extended the proven flange spool valves for the modular valve assembly with an execution for use in explosive, harsh and corrosive environments. The valve is made of stainless materials and high-quality surface protection, it can switch volumes up to 50 l/min at up to 350 bar. An optional detent enables valve actuation with a short electrical impulse, thus reducing energy consumption. The universally usable valve has a large number of diverse explosion protection certificates: ATEX, IECEx, UL/CSA, EAC, Nepsi, MA, Inmetro and Australia. Thus, it can be used worldwide in installations up to explosion protection zone 1 or 21 respectively, as well as for mining.
The valve body and the cover are manufactured from stainless steel (AISI 316L). The solenoid coil and the armature tube are very well protected against corrosion by their zinc/nickel coating.
The direct operated valve of nominal size NG6 is available with the designation WDYFA06…K9.
The valve is mainly used in applications with continually changing weather conditions or in the vicinity of the sea.