![]() ![]() Starting from decreasing pressure position, to increase the OUT pressure of an "H" CONTROLAIR Valve, its operator moves the valve assembly in contact with the exhaust valve seat. Further movement of the lever operates the pressure regulating portion.Ī complete description of the operation for each CONTROLAIR Valve is in the Service Information publication for that valve. The exhaust valves in these three-way valves are closed by initial movement from "Neutral" of the CONTROLAIR Valve lever. In addition to having a pressure graduating valve, the HC-2, HD-2 and HE-2 CONTROLAIR Valves have one or two normally closed, non-graduating, three-way valves, When the lever of one of these CONTROLAIR Valves is moved 10º or more from its "Neutral" position, it opens one of the 3-way valves and holds it open. Should leakage or a temperature variation occur that would change the outlet pressure called for by the CONTROLAIR Valve's operator position, this deviation in pressure opens either the CONTROLAIR Valve's supply valve or its exhaust valve to restore the correct pressure. When the CONTROLAIR Valve is in decreasing pressure position, the inlet valve is closed and the exhaust valve is open to vent the OUT pressure to atmosphere, inlet pressure is on top of the closed inlet valve. The ease with which an "H" CONTROLAIR Valve is operated is obtained by creating a differential between the counterbalanced air pressure and spring forces within the valve and by using this differential to open or to close valves. The sensitive, precise pressure control of the "H" CONTROLAIR Valve and its ability to change delivery pressure in small increments are obtained through the use of a large responsive diaphragm.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |