High capacity, size 1/2"-2" 400 WOG | Soft seat for bubble tight shutoff, spring loaded for fast seating action | Low cracking pressure 1/2 PSI | Perfect sealing both at high and low pressure wide temperature range: +10� to 210� | Stainless steel springs with neoprene o-ring seal | Suitable for water, oils and general purpose applications | Can be installed in ALL positions including the vertical down direction | Not for use at or below ground level