A welded spring pressure reducing valve

Abstract

The utility model relates to a kind of welding spring pressure reducing valves, two first, second pressure reducing valves are equipped in valve body and are communicated, each pressure reducing valve is equipped with upper and lower chambers with valve body cooperation, upper chamber is equipped with valve cover and upper valve seat, main spring, main spring is equipped with bellows assembly outside cover, the top of main spring is clamped in spring seat, adjustable screw rod is equipped between spring seat and protective cover, lower chamber is equipped with bottom cover and lower valve seat, secondary spring, upper and lower valve seat are equipped with liftable valve stem;The lower chamber of first pressure reducing valve is connected with inlet, the upper chamber of first pressure reducing valve is connected with the lower chamber of second pressure reducing valve by gas passage, the upper chamber of second pressure reducing valve is connected with outlet.Due to not set film structure, so that the entire valve body is more durable, can be applied to the working environment of high export pressure, suitable for water, air and non-corrosive liquid pipeline on working temperature 0-90 ℃, service life is longer, greatly reduce the cost of routine maintenance, maintenance.

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