In many regions across the world, potable and service water is produced from seawater. Evaporation, reverse osmosis or distillation processes are used to extract the dissolved salts from the water. The flow of seawater is controlled by valves, which must be particularly resistant to corrosive process media. This is because seawater, with its average salt concentration of 3.5 % w/w, corrodes metals at an extremely quick rate.
For such and similar applications, SAMSON SED recommends using the Type 495 Pneumatically Actuated Diaphragm Valve. The valve is suitable for both directions of flow and has an extraordinary flow characteristic. Its PFA lining makes it particularly resistant to corrosive process media. Thanks to the perfluorinated lining, the inside surfaces are smooth, which means that salts and dirt particles cannot get a hold. This largely prevents corrosion-induced damage. The maintenance-free plastic actuator is also extremely rugged and well suited for applications where resistance to chemicals and good mechanical properties are key. The actuator is available in a single-acting or double-acting version. It can be mounted in any desired position.
Various easily attachable accessories tailored to the diaphragm valve are available for adjustment and control.