Double valves | Article about double valves by The Free Dictionary
double valves[¦dəb·əl ′valvz]
Two valves in series used as subsurface traveling or standing valves in wells, the dual arrangement being more reliable than a single valve.
References in periodicals archive
This case is presented for involvement of double valves
of heart with regurgitant lesions, which is rare in a young male with Takayasu arteritis.
3 Y-adapter with double valves
stopping - 2 400 pieces
will be installed in the hull to permit the fuel oil to seep by gravity into rigid balloons made of aluminium, capable of holding up to 300m3 of oil.
The Fukuroi plant is one of the first to be equipped with a pneumatic-sender pressure vessel system, whereby a pressure vessel is installed underneath each of the three main scales, which is directly fed by the scale through DFWG double valves
and air shut-off valves.