Evdos SA products

Air Inlet Check Valve permits a high flow air intake into the pipe, in order to prevent negative pressure, the result of which would be damage to the sealing joints and a risk of the pipe being crushed. It provides a normal flow during pipe draining.

Air relief valves triple action type 400-600-900-1200 evacuate the air during the filling or the emptying of the pipe and suppress obstacles created by air when the pipeline work under pressure and facilitate the flow of the water.

Type 250 : dn 25 ( 1′ <` < ) type 251  with flange dn 25 – 40/65 – 80 – 100 – 125 – 150 – 200. Type 252  with flange dn 25 – 40/65 – 80 – 100 – 125 – 150 – 200 and   ball valve.

Air relief valves double action evacuate the air during the filling or the emptying of the pipe and facilitate the flow of the water.

Check valve membrane type secures tightness for big working duration , closes quietly and avoids water hammer.  Valve closes easily by a membrane with special form and composition.

Hydraulic   control valves   are   direct - sealing diaphragm valves activated by pipeline pressure. When in the control chamber pressure is equal to the pipeline pressure the rubber diaphragm closes the valve. The spring in the upper side of diaphragm helps valve to close regardless of pressure and flow conditions. Expancing the pressure from control chamber valve opens. The valve`s only moving part is its diaphragm.

Body: Ductile iron GGG 50, Carbon steel.