What is a Mechanical Seal? Vulcan Seals Training Ref: PRESMSBASIC / Revision: 01 / Created: OC / Created: 15/10/2014 / Revised 15/10/2014

Normally two components, one sealed to and rotating with the shaft, one sealed to and remaining static in the housing. Each part has a technically flat polished sealing face. The polishing allows a thin film of fluid between the seal faces that allows the faces to aquaplane on top of each other. The heat generated then evaporates the fluid before it reaches the inside of the seal, so no leakage occurs. Normally, some form of spring is used to maintain sufficient pressure between the two faces to allow this aquaplaning to start and be maintained. Seal failure occurs when the aquaplane equilibrium breaks down. Ref: PRESMSBASIC / Revision: 01 / Created: OC / Created: 15/10/2014 / Revised 15/10/2014 Vulcan Seals Training

Mech. Seal Basics Ref: PRESMSBASIC / Revision: 01 / Created: OC / Created: 15/10/2014 / Revised 15/10/2014

Pumps - Compressors - Agitators Mixers - Extruders Where are Mechanical Seals found? Ref: PRESMSBASIC / Revision: 01 / Created: OC / Created: 15/10/2014 / Revised 15/10/2014

Where are Mechanical Seals found? Ref: PRESMSBASIC / Revision: 01 / Created: OC / Created: 15/10/2014 / Revised 15/10/2014

Typical Mechanical Seal Designs O-Ring Conical-Spring Seals Bellow Seals Diaphragm Seals Wave Spring Seals There are many industry standard designs, each available in varying sizes and materials, the following are examples of the most common designs. Ref: PRESMSBASIC / Revision: 01 / Created: OC / Created: 15/10/2014 / Revised 15/10/2014

OEM Replacement Seals In addition to standard industry designs and sizes, many equipment manufacturers design special Mechanical Seals to protect their aftermarket. Vulcan has the world’s widest range of OEM replacement Mechanical Seals. Vulcan has seals to suit equipment from I.T.T. Flygt®, Groundfos®, Alfa Laval®, A.P.V.®, Allweiler®, A.B.S.®, K.S.B® and many more. Ref: PRESMSBASIC / Revision: 01 / Created: OC / Created: 15/10/2014 / Revised 15/10/2014

Mechanical Seal Materials Sealing faces – normal practice is to rotate a soft face against a hard face – perfect for most applications. Hard face against hard face for heavy duty & abrasives. Common seal face combinations; SOFT FACEHARD FACEDUTY Carbonvs.CeramicGeneral purpose Carbon vs.Silicon carbideGeneral purpose Silicon carbide vs.Silicon carbideAbrasive fluids Tungsten carbide vs. Tungsten carbideVery abrasive fluid Ref: PRESMSBASIC / Revision: 01 / Created: OC / Created: 15/10/2014 / Revised 15/10/2014

Mechanical Seal Materials Elastomer parts provide the actual seal between the Mechanical seal and the pump shaft and body. Three types; Moulded parts - such as bellows & seat boots O-Rings Wedges – virgin PTFE or Graphite – chemicals or temp. Main moulded and ‘O’-ring materials; Nitrile – NBR or Perbunan – all general duties, oil, water EPDM – hot water, alkalies (pH 8-14) and sanitary/food. Viton – FPM, FPR, Fluorocarbon – acids, chemicals, temp. Ref: PRESMSBASIC / Revision: 01 / Created: OC / Created: 15/10/2014 / Revised 15/10/2014

Mechanical Seal Identification In order to provide your customer with a Vulcan seal the Type, Size and Materials can be identified in a variety of ways: 1.Dimensions 2.Equipment References 3.Competitor Coding Vulcan provides a number of tools to assist in identifying the correct product for your customer. Ref: PRESMSBASIC / Revision: 01 / Created: OC / Created: 15/10/2014 / Revised 15/10/2014

Mechanical Seal Dimensions If you have a sample seal you can identify the type of seal by comparing the sample to the Vulcan brochure or using the Vulcan Seal identification suite. Once you have identified the type of seal you can then use calipers to identify the critical dimensions of the sample seal. Ref: PRESMSBASIC / Revision: 01 / Created: OC / Created: 15/10/2014 / Revised 15/10/2014

Identification From Equipment Look for the Pump Model Number. Will be on the Pump Information Plate or Pump Manual. Ref: PRESMSBASIC / Revision: 01 / Created: OC / Created: 15/10/2014 / Revised 15/10/2014

Identification from competitor coding Look for the seal part code or repair kit part code. Ref: PRESMSBASIC / Revision: 01 / Created: OC / Created: 15/10/2014 / Revised 15/10/2014

Vulcan’s Information Database O.E.M Name – Equipment Model – Seal Part Number Ref: PRESMSBASIC / Revision: 01 / Created: OC / Created: 15/10/2014 / Revised 15/10/2014

Vulcan Support Vulcan has over 30 year experience in Mechanical Seals and offer full support to our distributors. Our extra-ordinarily Extensive Range and Electronically Assured Ex-Stock Supply, ensure the seals are there; whenever you need them. Reliability from design, electronic manufacture / inspection, logistics and constant innovation. We ensure that Quality endures long after the initial product cost is forgotten. Vulcan Price Guarantee: not just price. But we do Guarantee to be The Lowest True Cost Supplier. The Most Competitive, Lowest Total Cost, Provider of Quality Seals. Ref: PRESMSBASIC / Revision: 01 / Created: OC / Created: 15/10/2014 / Revised 15/10/2014