How is the pressure in the sealing chamber of a single-stage cantilever pump determined?
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How is the pressure in the sealing chamber of a single-stage cantilever pump determined?
≈Outlet pressure plus inlet pressure 1/3
Thank you, is it one-third of the total, or one-third of the entrance area?
In other words, it’s the inlet pressure plus half of the head!
Estimation method: Inlet pressure + 0.5 * pressure difference. This value is for reference only and is not accurate
I just found a complete one, and here’s what I can tell you: 1. Impeller with balance holes: inlet pressure +0.1 pressure difference； 2. Impeller with shrouded blades: inlet pressure +0.25 pressure difference ； 3. The closed impeller is equipped with balance holes and an outlet ring, with an inlet pressure of +0.25 pressure difference ； 4. Closed impeller with flange but no balance holes, vertical pumps, double-suction pumps: equal to outlet pressure ； 5 Two-stage pump: inlet pressure + 0.5 pressure difference; 6 Multi-stage pump with balance tube: equal to inlet pressure
Which standard specifies this? Could you tell me? Thank you