#1 they were applying oil on the press fit area of the oil seal and rotary seal, the manual says to apply engine oil on water pump shaft and apply grease on the lips of the oil seal, never apply oil on the press fit area of the oil seal and rotary seal. When these deposits break off, they can damage the water pump seal. Install with a similar-sized socket. Various mechanical seals for water and sewage. This is the 1st time I'll be doing a mechanical water seal replacement. A mechanical seal is a device that uses the centrifugal force to push water through the hoses and plumbing system. Replacement of Mechanical seal Mechanical seals are used in centrifugal pumps to keep water or any liquid from making contact with the delicate parts of the machine. Before using this site please read the site disclaimer. Use the wrench to hold the shaft. A mechanical seal is one of the key elements in the design of these pumps. Open up the pool pump cover and lift the motor and its bracket out of the way of the impeller, a rotating blade assembly. Tiny particles can create wear and destroy seal faces, causing leakage. In a centrifugal pump, the mechanical seal (referred to as the “shaft seal assembly”) prevents the water that is being pumped from entering the bearing housing of the pump or simply the area between the motor face and the volute where the shaft passes through. One of the most important being your spa or pool filter pump. What makes the water move through the plumbing system when you use a centrifugal pump? You should cut the plumbing tube which is connected to the centrifugal pump. Dirty work surface/hands. Screw the impeller onto the motor shaft of the pump. 9) Install the mechanical seal in the pump: a) Place gland with stationary seal face and gasket on the pump shaft. Refill with 60% distilled water and 40% silicate-free aluminum-compatible anti-freeze and check/top-off, when COOL, after your first ride is done. This article has been viewed 33,547 times. Let it dry well before using the pump. When there is damage to the seal due to wear and tear, it becomes mandatory to replace it. To prevent the water from entering into the electrical system; a mechanical seal is installed centrifugal pump behind the impeller. To know more about Mechanical Seal call on +91-(2739) 271592 or email at info@leakpack.com. 7 Things to Know Before Selecting Metal Bellows Seals for Your Application. I am stuck after the oil seal and wanted to make sure I do not install more without having to remove. Thus, a vacuum is created through centrifugal force which pulls water. 2. Turn off the power and disconnect the pump from the electrical system. I don't have any water in the oil but just want to fix the problem. Deppmann technician Shane explains how to replace the seal on a Bell & Gossett 1510 pump. I had a new mechanical seal pressed in place, and I'm wondering about this ceramic disc (with rubber on one side) and the rubber bit on the mechanical seal. Does the ceramic disc go against the water pump impeller and the two rubber parts go against one another? Simple replacement, double benefit . The pump is ready again! Put water in the system to test and the water just runs out the weep hole without the engine even running. % of people told us that this article helped them. Rings of ceramic, carbide, carbon or composites of these materials are lapped flat in the range of less than 1 micron on an axial end face. Mechanical seal on a water pump is a shaft spins at incredible speed and rotates an impeller. Move the bearing assembly into position on the pedestal and install the bearing hold-down bolts. Place the pump in the original position. Before doing anything, disconnect the pump first. I've attempted to pull the water pump off due to the dealer said it was probably a mechanical seal, and I needed to pull it off to replace it. Thus, a vacuum is created through centrifugal force which pulls water. A mechanical seal pump could potentially save you a lot of annual costs. Take the wrench and secure the pump ends together. What clearance should there be between the impeller and the backing plate? Additional Information. A mechanical seal positioned just behind the spinning impeller on the motor shaft prevents water from entering the delicate electrical motor of the pump. Mechanical seal on a water pump is a shaft spins at incredible speed and rotates an impeller. Take the new seal and place it on the shaft. I am replacing the oil seal/water pump seal with a Quad Logic kit and it has an O-ring in it and I need to know where it goes. Also please note that any links provided may be part of an affiliate programme (viz. To prevent the water from entering into the electrical system; a mechanical seal is installed centrifugal pump behind the impeller. Figure 3shows a double lip seal packed with grease between the primary and secondary lips.When two seals are installed in tandem, the entire space between the two seals may be packed with grease.In some cases, seal suppliers will pre-lube seals upon request. I am replacing the oil seal/water pump seal with a Quad Logic kit and it has an O-ring in it and I need to know where it goes. The seal is the most difficult leaking pool pump repair and should be attempted as a last resort. Remove the airbox, exhaust pipe and resonator. KSB mechanical seals for water and waste water applications. Mechanical seal for pump is a kind of dynamic seal assembly, which is widely used on the rotating shaft. Link to post Mechanical seal on a water pump is a shaft spins at incredible speed and rotates an impeller. Insert the bolts first. You will need to purchase a new seal to be able to follow these instructions. Oil seal install before the water pump seal, I believe the side shown in the pic goes towards the engine,but double check the direction as you pull it out - someone correct me on this seal if I'm wrong - this job is not hard,just gotta be careful not to hit the white ceramic or the black carbon face. Open up the pump housing. It prevents water entering the electrical motor. This article has been viewed 33,547 times. We are also offering good mechanical seal products but also offering tungsten carbide, silicon carbide, Mechanical seal on a water pump is a shaft spins at incredible speed and rotates an impeller. Your email address will not be published. Mechanical seals vs. pump packing? I am guessing the installer collars are a requirement. To prevent the water from entering into the electrical system; a … Align the bolt holes on the motor and wet side of the pump. Why do mechanical seals need to evolve with rotating equipment? uses cookies to be able to optimally ... How to replace and install a mechanical seal. Slide the seal gently along the shaft without touching the front face of it. Open the impeller by turning anticlockwise off the shaft. 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Damage to pump seals swimming pool and spa, takes place due to overheating, vibration, and a sudden change of water pressure. Too much contact may overheat the materials; not enough contact may c… In order to assure you receive the correct seal for your pump, it is very important that you supply us with accurate information. When installing a new water pump, you'll need to install a new gasket, special gasket maker (RTV and anaerobic types are the most common), or an O-ring seal, depending on your application (if necessary, check your repair manual). Before starting the machine, ensure that the glue has dried off completely. KSB's direct retrofit mechanical seals . It's important to do this to avoid electrocuting yourself. Mechanical seals require clean water, or other compatible liquid, for the lubrication of the seal faces. Which is the best and most effective sealing technology for your pump or agitator application? Long ago, companies didn’t want to switch to mechanical seals because of the complicated installation and need to completely disassemble the equipment. ... A little bit of water will facilitate the removal of the chemical residue on the shaft. Generally the housing will have sunken bolts that can be unscrewed. If you really can’t stand to see another ad again, then please consider supporting our work with a contribution to wikiHow. Because mechanical shaft seal failures are the number one cause of pump downtime, we decided to dedicate this column to mechanical seal basics. What is a Mechanical Seal in a Centrifugal Pump? Behind the spinning impeller, a mechanical seal is positioned. wikiHow is where trusted research and expert knowledge come together. Remove the coolant from the engine using a siphon, wet/dry vac. It is also known as the end seal. The more common end- or rotating-face mechanical seal designs feature mating faces as the primary sealing elements. Use a saw to cut it. wikiHow is a “wiki,” similar to Wikipedia, which means that many of our articles are co-written by multiple authors. Although the seal is often blamed for the equipment failure, the real reasons are typically found in the operation and mechanical condition of the pump or the seals' environmental control system. Be sure to wear the right safety gear including industrial grade shoes, hard hats, protective gloves, safety glasses, etc. b) Slide rotary unit on shaft sleeve and set the back of the rotary unit on the second scribe line as determined in step 8. Hence, utmost precaution is needed. The leakage that comes out the atmospheric side is fairly low; the leakage in a Hydrocarbon, for example, is measured by a VOC meter in parts/million.Before mechani… Be careful not to damage the plastic of the seal plate. Share this post. If you are referring to a mechanical seal, then I usually find that if you phone the pump manufacturers and ask nicely, they will usually send out some information to help. They are situated on the shaft of the motor. Regular maintenance of these seals is needed to ensure there are no leaks. Check the owner's manual to find out if the pool must be drained for pump repairs. The mechanical seal rotary assembly needs to be removed. A mechanical seal is a device that uses the centrifugal force to push water through the hoses and plumbing system. BEFORE opening a pool pump to replace a seal be sure to inspect all other components of the pump for leaks. You can also search for Vulcan seals on the internet and ask for one of their seal books to be posted to you (they are free). The obvious function is that of a check valve to prevent liquid under pressure from leaking out of the pump, or from drawing air into the pump when under vacuum conditions. To create this article, volunteer authors worked to edit and improve it over time. Below, you will see a sequence of photos which will help us identify the seal assembly you have. It is the concept of centrifugal force. Bought another mechanical seal at $30.00 installed it and the same thing happened. Replacing these mechanical seals involves opening the pump system, removing the impeller from the pump's shaft and sliding the old seal off the shaft. I am guessing the installer collars are a requirement. Dirt or contamination in between the mechanical seals. Regular maintenance of these seals is needed to ensure there are no leaks. The “mechanical” seal within the water pump is created by the steady flow of fluid within the pump itself. A flow meter typically reduces the seal’s water consumption to 2 to 3 liters per minute, and a smart water control system can reduce consumption further to 0.05 liter to 0.5 liter per minute, depending on the application. Packing and mechanical seals used in fluid applications both require constant cooling and lubrication, and water is the most common means for achieving this. Set screw the rotary unit to the shaft sleeve (if seal is supplied with holding clips, remove at this time). The seal usually will force removal of the pump from service because of an unacceptable leak rate or, in some cases, a level or pressure alarm. Cartridge mechanical seal installation. Your email address will not be published. Remove the old seal assembly - Using a pair of channel-locks, pull off the old pump spring seal from the motor shaft. Remove the hose connected to the water pump cover. It is the time when you should keep the new seal handy. What makes the water move through the plumbing system when you use a centrifugal pump? Joined Aug 14, 2006 Messages 25 Location KS. More pronounced seepage and drips from the weep hole after this break-in period or leakage from the mounting surface are abnormal and signal part failure or faulty installation. Torque to shaft 18 ft-lbs and the impeller to 87 in-lbs when reassembling. All seals leak—they have to in order to maintain a fluid film over the entire mechanical seal face. The source of the water can be difficult to locate. where a rotating shaft passes through a stationary housing or occasionally, where the housing rotates around the shaft. Install the pump casing and secure using the (8) allen head cap screws. Thanks to all authors for creating a page that has been read 33,547 times. Copyright 2017 Leak Pack All right reserved. Seal Life; Since the seal must function as a slider or friction bearing, the seal has an unpredictable life span. Assure that the seal chamber is cleaned and shaft is de-burred to remove any sharp material that could damage seal sleeve ‘O’ ring. The sealed fluid migrates between the flat faces and form… All tip submissions are carefully reviewed before being published. wikiHow is a “wiki,” similar to Wikipedia, which means that many of our articles are co-written by multiple authors. The pool pump seal is inside the pool pump motor. Due to the rotation of the impeller, centrifugal force generates, and vacuum is created. To perform the task, you must open the pump system and remove the impeller from the shaft. Always check the installation instructions to ensure the lubrication you choose is compatible with seal components and the product pumped. To get at it, disconnect the electricity supply to the pump at the circuit box. When there is damage to the seal due to wear and tear, it becomes mandatory to replace it. Leaks from manifold cracks, threaded connections and loose winterization plugs can all leak. It has a shaft that spins at great speed and rotates an impeller. Mechanical seals are used in centrifugal pumps to keep water or any liquid from making contact with the delicate parts of the machine. It is also known as the end seal. Use the rear brake with the transmission in 1st gear to remove the *LEFT* handed impeller and shaft. KSB Pumps Co.,Ltd. Maintenance — “Knowing you have a maintenance crew that understands mechanical seals very well and can maintain them properly is another factor,” said GIW Southern Region Manager and slurry pump expert Angela Bryant. 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