Hy~Line and Ultima Lobe Pumps - Jabsco - #29

Text version of the page

4/00 6.43 Hy~Line and Ultima Lobe Pumps This seal utilises 3 or 4 PTFE lip seals (depending on pump size) fitted into a housing in the rotor case and running on a shaft sleeve fitted into the rotor (see fig 1). The system is supplied complete with a controlled release food grade grease feed system. For operation of this seal, a constant feed of food grade grease is required in order to avoid back flow of product into the seal area and to lubricate the seals themselves. The function of this seal is as follows: The PTFE lip seals are positioned such that they are sealing against the product being pumped. Introduction of a food grade grease at a controlled rate from the 2 mini-luber grease canisters allows the grease to feed under the lip seals and into the product. The feed rate is typically 250ml per seal over a 3-6 month period, i.e. contamination of the product is extremely small. This small leakage of grease offers good lubrication of the seals and also ensures that no product is allowed to get between the seals. The pressure generated by the grease feed system is 6 Bar. (See fig 2) This is the ideal low cost seal for chocolate or other products with a high percentage of undissolved solids e.g. biscuit cream.. Seal materials - Food grade PTFE Grease - Food grade grease This seal is supplied complete with the grease feed system. No special other installation is required. The grease feed system should initially be set to 3 months. Further adjustments of the feed rate can be made to optimise the replacement period of the grease cannisters. This can only be achieved by trials. In order to convert any mechanical seal design to multi-lip seal it is necessary to modify the rotor case (modified rotor case available- see spare parts list) All parts required for conversion are available as a kit (See spare parts list) Removal of the rotor case is required in order to remove and replace the lip seals. Replacement period is approximately 1 year. Inspection of the condition of the lip seals and the sleeve may indicate that longer seal life can be achieved. Grease canisters MUST be changed BEFORE they are empty in order to avoid loss of grease pressure and subsequent ingress of product between the seal resulting in the premature wearing of the seal and sleeve. Multiple PTFE Lip Seals (Hy~Line only) Seal Position and Design Materials and Applications Installation Procedure Conversion and Interchangeability Spare Parts Fig 1 Fig 2 Under Development