There are often misconceptions surrounding the availability of contacting, polymeric rotary shaft seals. Much of this misunderstanding comes from assumptions made by comparing contacting, polymeric rotary shaft seals to hard-faced mechanical pump seals. Pump seals are readily available as “off the shelf” items for purchase due to the progression of historic ANSI & API manufacturing standards for sizing and operational settings encompassing a wide range of pressures, speeds and liquids. Typically, pump seals are available within a 1-4 week timeframe.
National Gas receives funding to develop Gravitricity underground hydrogen storage system
One single rock salt mine - Winsford - has 23 <i>MILLION </i>cubic metres of void and even allowing for 10% of that void set aside for hazardous waste...