| 摘要 |
A pressure responsive valve having a single tank opening and single main pallet which provides pilot operation to relieve either overpressure or vacuum conditions within the tank. A pressure responsive pilot valve includes a pallet movable relative a seat, wherein the pallet is arranged within a housing and biased toward seated position, and adjustable aperture means is provided in the housing to regulate the volume-rate of gas flow past the pallet and through the valve.
|
