Long lasting, leak free seals...Long lasting, leak free seals...avoid the dreaded pressure bottle.All seals are simple to install and pressure tested for leaks before shipment.Our seals do not require a pressure bottle containing reserve oil seal oil below 100 psi. Pressure bottles are an unnecessary annoyance requiring daily monitoring.We do not use packing which is, of course, designed to leak.We use mechanical seals which are designed for extreme shock and vibration.Wear parts shipped within 2 working days of order receipt or the Parts are Free!This guarantee applies for 1 year after the purchase of a pump.Run dry ability - our mechanical seals are oil cooled, permitting limited run-dry operationSpecial mechanical seals are oil cooled permitting limited dry running.Steady, Pulseless flow due to helix, 3 wing lobe design.Ease of maintenance.Mechanical seals, lobes, and wear plates can be changed on site without disconnecting suction and discharge fittings.