Big adjustable control valve that compares of low discharge

The utility model relates to a big adjustable control valve that compares of low discharge, including the valve body, medium inlet and medium export set up respectively in in the valve body, valve body and valve gap pass through fastener sealing connection, still set up the valve pocket in the inside of valve body, disk seat and sleeve install respectively in in the valve pocket, offer the case mounting hole in the disk seat, big case install in in the case mounting hole, big case and case cover threaded connection, the valve rod stretches into the inside of valve gap, it runs through the case cover and is connected with the through -hole of gate valve in -core portion through little case, and valvelet core an organic whole takes shape in the one end of valve rod, still cup joints the spring in the outer end of valve rod. The utility model discloses simple structure, the structure that adopts big or small case to combine together have replaced original two sets of valve structure's scheme to realize low discharge big adjustable ratio can directly reducing user investment cost 70% through a deck valve door, satisfy from the low discharge to large -traffic wide region regulation, not only satisfied the user demand, still lengthened equipment life.