ERCEM GV
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ercem SEALS ERCEM GV ERCEM seal is a mechanical seal which operate thanks to the friction of the rotating stainless steel ring and static carbon ring. The nitrile bellows fixed to the stern tube with collars 316L provides compression between the steel ring and the carbon ring . The rotating seal ERCEM tolerate misalignment and provides a perfect axial sealing thanks to the two O-rings mounted in the stainless steel ring and radial by pressing the carbon and stainless steel ring . Our ERCEM sealing are mounted on propeller shaft but also on rudders . - Direct evolution of the ERCEM : The ERCEM GV. This system is particularly suitable for fast boats (above 20 knots ) when sterntube empties himself by depression due to speed. It can be use too for boat without water or air inlet on sterntube, improving considerably the lubrication of water lubricate bearing, with reduction of electrolytic reactions caused by the water stagnation in sterntube. CARBON/GRAPHITE RING Rings are produced with Isomolded, very fine grain, high strength, high density, isotropic graphite resin impregnated for high mechanical and sealing applications. This material may tolerate temperatures up to 200 ° Celsius. Rings are produced on CNC machines to ensure a glossy surface state on the contact face. Depending on the application, the carbon ring may be provided with polyamide fitting to provide better lubrication in water or air vent. We use a non-metallic material to avoid electrolytic phenomena. STAINLESS STEEL RING 316L stainless steel rings are machined on CNC machine to ensure a perfect surface condition and exacting tolerances. The rings are slipped onto the shaft and held in place by 3 setscrews cup end in stainless steel 316L. The rings are also equipped with two O-rings in nitrile to ensure a perfect seal. Concerning stainless steel rings for shaft above Ø55mm, they are composed of two parties to facilitate mounting. MAUCOUR FRANCE - Votre spécialiste en propulsion marine depuis 1868 - www.maucour.fr 5, rue de la Dutée - CP 1202 - 44806 Saint-Herblain cedex- Tél. +33 (0)2 40 92 16 36 - Fax : +33 (0)2 40 92 02 89 - info@maucour.fr Ce document n’est pas contractuel - This document is not contractual Operating princip

ercem SEALS BELLOW ERCEM can be fitted with two different types of bellows : Reinforced bellows are made of high strength reinforced nitrile covered by Aramid more known as Kevlar®. It can be mounted on our entire range. Its advantages are increased resistance to petrochemicals products, UV, cuts, strains and also to high temperatures. WATER PICK UP KITS Water Pick-Up Kits include everything needed to connect your ERCEM to a point in the engine’s raw water cooling system: Brass Tees, hose and 316L clamps. Water pick up kits- Tee 3/4’’ Water pick up kits-- Tee 1’’ Water pick up kits-- Tee...

ercem SEALS ERCEM GV SEAL Description: L = total length (the dimension ‘L’ is given as ‘’indicative’’ without compression) C= compression + or – 2 mm (simple) + or – 4 mm (reinforced) Reinforced Bellow Reinforced Bellow MAUCOUR FRANCE - Votre spécialiste en propulsion marine depuis 1868 - www.maucour.fr 5, rue de la Dutée - CP 1202 - 44806 Saint-Herblain cedex- Tél. +33 (0)2 40 92 16 36 - Fax : +33 (0)2 40 92 02 89 - info@maucour.fr Ce document n’est pas contractuel - This document is not contractual

ercem SEALS ERCEM GV SEAL SPARE PARTS ERCEM GV REFERENCE CARBON RING STAINLESS STEEL RING Ce document n’est pas contractuel - This document is not contractual

ercem SEALS ERCEM GV SEAL SPARE PARTS REFERENCE ERCEM INJECTION BAGUE CARBONE Bague INOX OPERATING PrINCIPLE ERCEM GV shaft seal is a technology derived from submarine seals adapted to marine shafts. ERCEM GV is composed of an elastomer reinforced Kevlar bellow (2) which is mounted on the sterntube (10) with 2 hose clamps (1). A graphite ring (3) provided with a water inlet (6) is mounted on the other side of the bellow with two hose clamps. The stainless steel ring (5), fastened to the shaft by 3 grub screws (4) compress the graphite ring thereby sealing between these two parts. Sealing...

ASSEMBLY INSTRUCTION PRECAUTIONS Mounting of the ERCEM GV and any maintenance interventions must be carried the boat out of the water. During unpacking and installing the seal, take care not to damage the stainless steel ring and the graphite ring, the contact faces sealing must be clean and scratch free. Check for missing parts before installing the seal(see parts list above). Never disassemble the water inlet on the graphite ring and never try to tighten it. ASSEMBLING INSTRUCTION Remove coupling from shaft and back off the propeller shaft to exit the old seal. - Slide bellow (2) with...

ASSEMBLY INSTRUCTION ERCEM GV must be supplied with water, so: Use a plastic or reinforced rubber hose complying with the safety rules, flexible enough not to seek the graphite ring. We offer kits with connections to suit your application. Insert the hose and the clamps on the water inlet fitting of the graphite ring. Do not over tighten the hose clamps on the plastic inlet. Connect the hose to the engine cooling circuit to the return of sea water prior to injection into the exhaust, or on a strainer. The hose will be supported by a bracket above the seal so as not to weigh on the graphit...

ASSEMBLY INSTRUCTION TROUBLESHOOTING Premature wear of the graphite ring with strong projections: Check the compression of the bellow and adjust if necessary Check the surface condition of the contact surfaces of graphite and stainless steel rings, clean the stainless steel ring with a clean cloth or replace parts as necessary. Check and control the flow rate and the water supply pressure in the graphite ring. The maximum pressure allowed by the ERCEM seals is 0.7 bar. The bellow and graphite ring oscillate in operation: Check the stainless steel ring is properly perpendicular to the...