Automatic backwater controlling valve for micropressure and atmospheric hot-water boiler

Automatic backwater controlling valve for micropressure and atmospheric hot-water boiler

CN
  • CN 2,157,362 Y
  • Filed: 01/06/1993
  • Issued: 02/23/1994
  • Est. Priority Date: 01/06/1993
  • Status: Active Grant
First Claim
Patent Images

1. , a kind of minute-pressure normal-pressure hot-water boiler backwater autocontrol valve, it is characterized in that opening is fixed a gland 9 by flange 10 above valve body 1, one piston rod 3 passes gland 9, the fixedly connected flap 2 in the lower end of piston rod 3, the current that flap 2 faces valve body 1 inside pass through valve port, the upper end of piston rod 3 places in the inner chamber of hydraulic cylinder 5, piston rod 3 upper ends are provided with a piston 4, the fixedly connected top cover 11 in hydraulic cylinder 5 upper ends, between top cover 11 and piston 4, be equipped with a pressure spring 8, one side of hydraulic cylinder 5 is respectively equipped with circulating water pump press water import 6 and heating system backwater import 7, and press water import 6 and backwater import 7 all communicate with hydraulic cylinder 5.

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