What are buna-n (nitrile) rings?
” Buna-n or Nitrile rings have excellent resistance to petroleum-based oils & fuels, water and alcohols. They also have good resistance to acids and bases, except for those that have a strong oxidizing effect. “What’s the difference between an automatic and non-automatic pump?” An automatic pump has a built in float switch that will turn on the pump automatically at a fixed water level. After the water is pumped out to certain water level (a preset level), the pump will turn itself off. A non-automatic pump has no integral switch, and so would turn on when plugged in, and off when unplugged. A separate control like a piggyback float switch (variable level float switch) can be installed on non-automatic pumps to provide a switch with flexibility for pumping range adjustments. “How does a VLFS (variable level float switch) work?” The pumps that come with a variable level float switch are non-automatic pumps. You just attach the float switch and the pump will behave like an automatic pump
