1, in stock?
for 380v, 50hz, 3phase, yes
2, which part are stainless steel?
liquid contacting parts are stainless steel or cast iron
3, avantage?
high head, variable inlet&outlet size.
4, which kind of seal?
mechanical seal, alloy+alloy
5, any spare parts available?
the pump only change seals, often match 2 sets of seals suggested.