I have read the AWESOME write-up on marinehowto.com and the only thing I’m left with trying to decide is the type of packing to use. Seal face material pairings 51 3. Forum List Message List New Topic. That being said there are thousands of happy boaters who have had decent results with these packings. Flush pressure should be a minimum 1 … Secondary seals 59 5. Since 1968, West Marine has grown to over 250 local stores, with knowledgeable Associates happy to assist. Fittings for Typical stuffing box with lantern ring - cross section: this purpose are standard on many pumps (consult pump manufacturer's manual). Its excellent lubricity and high thermal conductivity keeps shafts running cool at all speeds. You want to keep time and costs at a minimum, while still providing a pleasant experience for your buyers. China Shaft Packing manufacturers - Select 2020 high quality Shaft Packing products in best price from certified Chinese Transmission manufacturers, China Shaft … Radial lip seals are primarily used to retain lubricants and exclude contaminants. Read full chapter. Old packing material is the number one cause of problem leaking and shaft wear and damage. Fittings for this Purposes are standard on many pumps. 3. Posted by Bill Hinote . Lubrication failures 77 3. Most 80's models seem to use 3/16" while most 90's use 1/4". Virtually eliminates shaft scoring: Stays pliable, never hardens or becomes abrasive, even at high shaft … They’re made of graphite-impregnated aramid fiber and are for use in pumps and valves. The shaft size is 1 1/4" - any idea what size shaft packing material I should use 3/8th or 1/4"?? You are correct that eventually the stuffing box will need to be repacked. Display. Unlike flax and other packing materials, once Ultra-X is installed you never need to worry about it again, virtually eliminating maintenance. For example if the shaft is of 50 millimeters diameter then the circumference is given by the formula P = Pi x Diameter. The drivetrain starts at the transmission and includes everything through the end of the propeller shaft – including couplings, drive plates, the marine stuffing box and shaft packing, or marine shaft seal, the flex couplings, the cutless bearing and more. Wear 72 Chapter 5. In centrifugal applications, abrasive material tends to get embedded into the fibers turning the packing into a grinding wheel Other abrasive service fibers include Novaloid, Nomex, and Kynol a phenolic material. Our choice for value & simplicity is the Teflon packing. Based on the article I feel I want to avoid any of the graphite based/impregnated packing materials. Open the shaft stuffing box. Sealing takes place in a cylindrical plane parallel to the shaft. Tribology 63 1. ® Packing Material Dissipates frictional heat: Over five times more thermally conductive than flax and PTFE Grease-free installation: Self-lubricating and conformable, easy to install and remove after use. (Stuffing box gland inside diameter minus shaft diameter divided by 2 should be the size of the packing material being used) Check the condition of the shaft. • Special petroleum-base break-in … Chemical, physical degrading and wear 80 5. • Conformable material accepts run-out and shaft misalignment. Flax and jute are more abrasive than asbestos and can cause shaft damage. Obviously the rudder shaft doesn't turn as much, so doesn't heat up the same way, but it's packing material in there I bet. Shaft packing wherein the sealing ring and/or the counter-ring are coated with a thin layer of refractory or non-refractory material deposited thereon by using a plasma blowpipe. The wax and tallow provide lubrication so that the twine can be compressed against the shaft without abrading the metal. Condition Packing Material Low pressure (less than 100 psi) Low speed (1,000 FPM6 and below) Medium pressure (100 to 150 psi) Medium speed (1,000 - to 2,000 FPM) High pressure (above 150 psi) High speed (above 2,000 FPM) Pumps & Pumping - 172 - Plant fibers with Teflon, silicon, TFE, or PTFE lubrication. This type of shaft seal relies upon compression of a packing material around the shaft. These seals require lighter packing pressure than standard oil- and water-resistant packing seals, so they cause less friction and reduce shaft wear. SealSales offers you exceptional quality and pricing on industrial mechanical seals including: Single Spring, Cartridge Seals, Pump packing, Gaskets, Viton, o-rings, shaft seals, non-asbestos, Gasket Material, PTFE, EPTFE, Grafoil ®, molded rubber, spiral wound gaskets, and multi-spring mechanical seals all available to order On-Line. My 1989 was just between the two. Quote Reply Topic: Shaft Packing Posted: April-14-2011 at 11:05am : Hi, I have read lots of threads here about the correct size packing for different Ski Nautiques, but I am still not sure what to use. After 15 years of successfully handling demanding industrial pump applications, it’s now proving itself in the marine field, too. 81. Among many other projects, I will be re-packing our Spartan prop shaft stuffing box. Duramax Ultra-X Packing. Be sure to keep in mind the safety of your packages while in transit, and follow shipping guidelines for fragile or hazardous materials. The process fluid must be free of solids (as for practically all mechanical seals) and must not attack the material of the O-ring shaft packing. PROVIDE MEANS OF LUBRICATING THE SHAFT AND PACKING THROUGH THE LANTERN RING BY SUPPLYING WATER, OIL, GREASE OR LIQUID HANDLED IN THE PUMP. Single outside balanced seal. To understand this we need to understand the dynamics or the properties and the workings of the packing material itself . Any burrs or sharp areas must be repaired prior to installation. Braided flax fiber that has been thoroughly lubricated with tallow & wax. Flax Packings Square Braid Construction. Product Form. If I measure the inside diameter of the packing nut (where it is threaded), it is 37mm. This material consists of braided twine impregnated with wax and tallow. A stuffing box—also called a stuffing gland, packing gland or packing box—forms a seal between the prop shaft and the hole in the hull through which the shaft passes while allowing the shaft to turn freely. The most current boats use a dripless seal system that requires a cooling hose attached to the engine. Boat Drive Train, Shaft Packing & Stuffing Boxes. • Low gland squeeze extends packing life, superior shaft cutting resistance and reduced power draw. Provide means of lubricating the shaft & packing through the lantern ring by supplying water, oil, greease or liquid handled in the pump. Tefpack synthetic shaft packing is a unique product. shaft packing material December 10, 2011 05:02PM : Registered: 11 years ago Posts: 641 : Hi all: I'm trying to get all my info together to start a steam power project. Rudder shafts have stuffing boxes or shaft seals just like prop shafts. US3810637A US21780072A US3810637A US 3810637 A US3810637 A US 3810637A US 21780072 A US21780072 … Ultra-X is a high performance, non-asbestos, compression packing that is engineered specifically for the marine industry. View as. GFO Marine Shaft Packing is a braided propeller and rudder fiber packing that you can install and forget about. This yarn is not subject to attack by mildew, making it rot resistant and providing longer service life and superior performance. De très nombreux exemples de phrases traduites contenant "shaft material" – Dictionnaire français-anglais et moteur de recherche de traductions françaises. Shop with confidence - get free shipping to home or stores + price match guarantee! Installation failures 84 6. Lubrication 65 2. Packing Material Considerations. Bill Hinote. Shaft finish, hardness, and material are not critical. Packing • Thoroughly lubricated synthetic yarn with 50% pick-up of virgin PTFE suspensoid. The seal can handle a wide variety of fluids, pressures up to 3000 psi, speeds to 50,000 rpm, and temperatures from -425-1200 F. This type of seal has become popular on pumps where leakage is not allowed. Shaft Packing; Buck Algonquin Flax Packings Square Braid Construction & Dripless Moldable Packings available for your marine shaft packing needs. Most packing materials are impregnated with a form of lubricant from new. "6.7.4 Graphite impregnated packing material shall not be used because of the possibility of galvanic incompatibility with the shaft material." No matter how high performing the packing material, it won’t function properly with a misaligned or damaged pump shaft, and will experienced a shortened operational life. Many factors come into play when selecting the right packing materials for your business. It consists of a threaded sleeve and a hollow nut, through which the prop shaft passes. Justin_NSA. URL: … Figure 5-11. Packing & Jointing Packings Shaft Seal Gland Packing Flexible Graphite Based - Valqua No.VFT-22 Failure of mechanical shaft seals 75 1. Compression packing is a ring of deformable material, used as a set of rings, mechanically loaded to form a seal to limit leakage along a rotating shaft. The most accurate is to measure the size of the shaft and calculate its perimeter or circumference. Put the new gland packing on the shaft circumferentially or on a template and then mark and then cut the required length. It is constructed from a strong, durable synthetic yarn impregnated with Teflon. per page. Flax packing material is the oldest, replaced by a better material called graphite packing, replaced by a better material called Teflon packing, and “Fiber” packing, and the newest ski boats use a different style altogether. The gland at the rotating shaft of a centrifugal pump may be packed in a similar way and graphite grease used to accommodate continuous operation. It’s already being used by the US Navy and Coast Guard and many commercial work and fishing fleets. Materials of other shaft seal parts 61 Chapter 4. Many other designs are available, and the manufacturers should be consulted for advice on specific sealing problems. However, they should not be treated as a "set it and forget it" packing. (Courtesy of Dura-metallic Corp.) View chapter Purchase book. Check to make sure the new packing is the correct diameter size. US3810637A - Shaft packing - Google Patents Shaft packing Download PDF Info Publication number US3810637A. Remove the old packing completely. Contamination failures 78 4. Introduction to failures 76 2. These three materials each perform well and tend to be less abrasive to shafts than Kevlar so they are suited for centrifugal pump applications. Packings with 100% GORE GFO Fiber can provide maintenance engineers with consistently high performance general service packing for wide application and use, including sealing shafts on high-speed pumps, mixers, agitators or any other equipment with rotating or reciprocating shafts. Shop, read reviews, or ask questions about WESTERN PACIFIC TRADING PTFE Flax Shaft Packing at the official West Marine online store. The gland nut allows the packing material to be compressed to form a watertight seal and prevent water leaking up the shaft when the tap is turned on. emphasis on tolerable sealing material leakage and emissions. Shaft speed: What is the surface speed of the shaft? A short length of heavy-duty hose connects the assembly to the stern tube. The right packing materials are impregnated with a form of lubricant from new Coast Guard and many work... If the shaft is of 50 millimeters diameter then the circumference is given by US... In pumps and valves is a high performance, non-asbestos, compression packing that you can install and forget ''!, read reviews, or ask questions about WESTERN PACIFIC TRADING PTFE flax shaft packing needs us3810637a shaft. 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