... .4. Idle running is applicable without causing damage.5. Well and special designed shaft seal enable to ... into the bearings, so as to protect the pump.5. Installation outside of the trough.6. Application: chemical ... Caliber: "25"-1 inch (or "40"-1.5 inches, "50"-2 inches) 3.Specific Gravity: VK-1.1 (or VP ... or 1/6HP, 1/3HP, 1/2HP, 3HP) 5.Electrical frequencies: "5"-50Hz, "6"-60Hz6.O-ring Material: N-NBR, ...