A seal piping plan is designed to improve the environment around the mechanical seal and therefore increase the performance and reliability of the seal. Secure the pump in its operating position so it can not tip over, fall or slide. Replacement seals for thrush pumps mechanical seals products. When the sealing is achieved by means of packing, the chamber is referred to as a stuffing box. Always replace safety devices that have been removed during service or repair. Carefully wipe polished surface of new seal seat with a clean cloth. Replacement seals for allweiler, edur, hilge, seim and speck. On other models, the seal is contained in the pedestal bracket or adapter to the motor. Once the new seal is on the shaft, use the wrench once again to screw the impeller back on.
Every centrifugal pump must accommodate a spinning shaft while mechanically maintaining fluid or gas contained in the wet end of the pump. The vsc series is available in sizes from 4 x 4 up to 10 x 10, covering flows to 4000 gpm. Grundfos replacement seals used in cr cri crn series vertical multistage centrifugal pumps bellows component seal grundfos type b value guardtype vgm706b pump models cr2, crn2 s, cr4, crn4 s, cr8 value guard seal shaft material grundfos part no. Bronze close coupled centrifugal pump 830b oberdorfer. The shaft seal is a sealing element which seals the rotating shaft of a centrifugal pump where it passes through the nonrotating pump casing, reducing fluidleakage to atmosphere or the entry of air from outside to a certain level, and keeps wear of the sealing faces as low as possible.
The vd and vld centrifugal pump series are engineered to accept any type of mechanical or packing seal while minimising axial thrust. The manufacturer listings are alphabetical, refer to pages 7. Main seal is high wearing hard alloy mechanical seal that is with a long life. A mechanical seal is a method of containing fluid within a vessel typically pumps where a rotating shaft passes through a stationary housing or occasionally, where the housing rotates around the shaft. Under the right conditions, mechanical seals can experience thermal shock and shatter within 30. Jul 17, 2018 this inoxpa service and maintenance video demonstrates the process of replacement of double mechanical seal of prolac hcp, centrifugal pump for hygienic applications. Regular maintenance of these seals is needed to ensure there are no leaks. It is suitable for water, oils, and some mild solvents.
Pump packing and mechanical seal replacement chart index. Type b single stage centrifugal pump berkeley b3zrm. Shanley pump and equipment carries a full line of the most popular sizes and styles in centrifugal pump seals and progressive cavity pump seals ready to ship in stock the same day you order. Our mechanical seal inventory includes goulds centrifugal pump mechanical seals, roper pump mechanical seals, durco pump mechanical seals, flygt mechanical seals, and griswold pumps mechanical seals just to list a small selection of our extensive inhouse mechanical seal inventory. It converts the energy provided by a prime mover, such as an electric motor, steam turbine, or gasoline engine, to energy. Failure to observe the instructions contained in this manual could result in personal injury and. Periodic maintenance and inspection is required on all pumps to insure proper operation. The 3656 and 3756 sgroup pumps from goulds water technology have been designed with technical benefits to meet the needs of users in a variety of water supply, recirculation, and cooling applications. Pump type seal type pump models see page centrifugal packing current models 2 discontinued models 3 mechanical cm and cs models 4 cf, cg, ch and cl models 5 cp, cr, cz, s100, s200 and hl models 6 scpu portable and motor mechanical all models 7. The materials of seal construction, particularly the sealing faces and elastomers.
As the flow enters through the impeller eye of the pump and up the impeller vanes, the fluid is at a lower pressure and low velocity. As mechanical seals can be used to seal a myriad of different products on an equally vast array of equipment, we will be primarily focusing on the use of mechanical seals on rotating shaft pumps. Centrifugal pump seals, mechanical seal installation tutorial by kevin ging duration. The hydraulic machine which converts the mechanical energy into hydraulic energy is called pumps. In plan 11, product is routed from the pump discharge to the seal chamber to provide cooling for the seal and to vent air or. We carry mechanical pump seals and standard singlespring pump seals as well as cartridge pump seals for you centrifugal pumps and progressive cavity pumps. Mechanical seals are used in centrifugal pumps to keep water or any liquid from making contact with the delicate parts of the machine. Gabbioneta vi vs4 type api 610 centrifugal pump robust gabbioneta vivs4 process pumps are designed to minimise axial thrust in low npsh environments and protect against incursions of dirt into the. In a centrifugal pump, the use of mechanical seals is the most effective way to prevent the leakage of the fluid from the centrifugal pump to the external parts and other components. Pump mechanical seal centrifugal pump spare parts xbsy. Both the seal chamber and the stuffing box have the primary. Since our subject is dealing with pumps, lets first explore a basic understanding of the need to seal a process liquid in a centrifugal pump.
Mcc cast iron pumps with 316 stainless steel impellers. Introduction the mechanical seal acts as a check valve and a slider bearing. Shanley pump and equipment carries a full line of new and replacement pump seals for all seim screw pumps we stock seim screw pumps rely on a variety of seals to perform pumping applications with custom seals available for specific applications such as oils or other viscous fluids that can attack other seal types. Basics concepts of operation, maintenance, and troubleshooting, part i.
As the name suggests, it relies on the principal of centrifugal force. It is either clamped between the backplate and the gland. The fluid must be available to the pump with sufficient energy so that the pump can work with the fluids energy. Mechanical seal replacement refer to figures 1 and 2. If you are unable to identify the seal, it will be necessary for you to. This device prevents the impeller from loosening if the pump is accidentally run backwards. How to respond to mechanical seal leakage in a centrifugal. These selfpriming centrifugal pumps are used for continuous transfer pumping of chemicals from tanks and sumps, and in. It converts the energy provided by a prime mover, such as an electric motor, steam turbine, or.
The seals are arranged by shaft size from smallest to largest. Pto belt driven centrifugal pump ace pump corporation. The size of the centrifugal pump and the arrangement that differ. Provides a protective buffer between the product and the atmosphere, and isolate products being pumped from the atmosphere. M pumps process srl via dellartigianato, 120 45015 corbola ro italia tel. Always replace both seal seat and seal head to ensure proper.
Carbonceramic mechanical seal, ansi osha compliant guard, stainless steel pump shaft and a shaft jacking coupling to simplify maintenance. When sealing a centrifugal pump, its essential to allow a rotating shaft. There are metal parts, a metal spring, a stationary seat, a rotating seat also called the primary ring, and elastomers. Mechanical seals for pumps how mechanical seals work.
Read on for a basic understanding of mechanical seals, and how they differ from packing. Slide the new mechanical seal along the shaft of the motor. Feb 05, 2020 mechanical seals are used in centrifugal pumps to keep water or any liquid from making contact with the delicate parts of the machine. The xl also offers dynamic exclusion seals for the drive end of the pump. Checklist of problems vvith centrifugal pumps and their causes. The most effective method of preventing the leakage of the fluid from the centrifugal pump to the external surroundings is using the mechanical seals. Mechanical seals consists primarily of a rotary seal face with a driving mechanism which rotates at the same speed as the pump shaft, a stationary seal.
This close coupled centrifugal pump uses a mechanical type shaft seal with a nitrile rubber element. Basic concepts of operation, maintenance, and troubleshooting part i introduction the operating manual of any centrifugal pump often starts with a general statement, your centrifugal pump will give you completely trouble free and satisfactory service only. Makdaddys ansi api plan 5253 mechanical seal pot systems for industrial, gas, and oil applications. Replacement seals for americanmarsh pumps mechanical seals products. Seal replacement instructions the following instructions are general. Know and understand centrifugal pumps \ r i \ suction piping. Designed for space savings and easy servicing, the e80sc allows mechanical seal maintenance without disturbing the pump, motor or piping.
Centrifugal pump mechanical design, analysis, and testing. Installation,operation, andmaintenancemanual goulds pumps. This article teaches you how to replace the mechanical seal. The mechanical seals help sealing the rotating part of the shaft against the stationary part of the pump housing.
Replacing the mechanical seal on your centrifugal pump. A mechanical seal is simply a method of containing fluid within a vessel typically pumps, mixers, etc. Before disassembling the pump for overhaul, ensure all replacement parts are available warning lock out power supply to driver motor to prevent accidental startup and physical injury. Clean adapter recess before inserting a new seal seat. The teflon sleeve on the 3198 must be cut off the shaft to be removed. The seal stationary face if fitted in the seal cover, remove it if replacement is required. How to replace mechanical seals in centrifugal pumps ehow. Fluoroelastomer seals and polytetrafluoroethylene ptfe seals are available for severe solvents, difficult chemicals, and elevated temperatures.
Centrifugal pump definition centrifugal pump can be defined as a mechanical device used to transfer liquid of various types. Search by the oem part number using the search function at the top of the page or use search by specification. The replacement shaft sleeve the double life 250 series model pump will outlast and is more powerful and easier to maintain than other conventional pumps on the solids control centrifugal pumps. Enclosed impeller in 316l stainless steel maintains maximum efficiencies over the. Pumps are specially designed and manufactured to cater for. 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. Sealing of sb series sand pumps is xbsy mechanical seal, this mechanical seal has been applied for utility model with patent number of zl 2007 2 0079857. Here are 6 of the most common reasons mechanical seals can fail. The concept of the fluid being available to the pump is discussed in detail in chapter 2 of this book.
Because mechanical shaft seal failures are the number one cause of pump downtime, the writer decided to dedicate this column to mechanical seal basics. At the same time, bearings are outside of the sump. Mechanical seal leakage in pumps how much, if at all, mechanical seals do, must or must not leak is a controversial subject for which there are few clear answers. Oem names, brands, model or part numbers are for identification purposes only. Aisi 316l stainless steel impeller and seal housing for corrosion resistance, and improved strength and ductility. The hydraulic energy is in the form of pressure energy, if the mechanical energy is converted into pressure energy by means of a centrifugal force acting on the fluid, the hydraulic machine is called a centrifugal pump centrifugal pump parts. The precision lapped faces on mechanical seal are easily damaged. Seal and bearing replacement on the bell and gossett vsx double suction. Calpeda nm series centrifugal pumps with mechanical seal, cast iron body with stainless steel motor shaft. Also known as cantilever pumps, vertical centrifugal pumps feature a unique shaft and bearing support combination that results in the volute hanging in the sump. Checklist of problems vvith centrifugal pumps and their causes centrifugal pumps are one of the worlds most commonly used devices. Mechanical seal assem sta seat, stabana seat rotatin seal e assemb doublelife.
They are ideal for domestic and commercial application. Mechanical seals for centrifugal pumps select seals australia. When sealing a centrifugal pump, the challenge is to allow a rotating shaft to enter the wet area of the pump. A mechanical seal, figure 1, consists of a stationary member seat. Centrifugal pump mechanical design, analysis, and testing author. Do not touch the front face of the seal, as it is highly sensitive to the oils on your fingers. Read all instructions in this manual before operating pump. Also accepts gasket s05126 as replacement for oring. Remove pump body or pump casting containing the seal on some models, the pump body is clamped to motor adapter by a single bolt. Sep 29, 2015 a detailed look at the correct procedure when fitting or replacing a mechanical seal. Fluid enters a centrifugal pump through the suction nozzle at the center of a rotating impeller. Mechanical seals for pumps goulds, durco, and more.
How to replace mechanical seals in centrifugal pumps. Mechanical face seal replacement how to use this catalogue locate the manufacturer of the equipment. Model 3196 iframe installation, operation, and maintenance manual 5 introduction and safety introduction purpose of this manual the purpose of this manual is to provide necessary information for. The rotary portion of the seal needs to be removed from the sleeve by loosening the set screws and sliding off the sleeve. Centrifugal pumps installation and maintenance manual. How to respond to mechanical seal leakage in a centrifugal pump in order to understand centrifugal pump leakage, its important to first understand the basic operation of a centrifugal pump. Allowing the pump to run dry allowing your pump to run dry can be very damaging to a mechanical seal. The bearings and mechanical seals can be replaced without removal of the rotating assembly, reducing the down time required for servicing of the pump. Type b single stage centrifugal pump table i bm no. Installation and operation manual selfpriming centrifugal. The wide access motor bracket will accept tc, hp, and iec motors. Mechanical seal replacement video dragon products ltd.
The vsc is available in bronzefitted construction with working pressures up to 300 psig. They assist in sealing the rotating component of the shaft alongside the stationary componentpart of centrifugal pump housing. The majority of hvac centrifugal pump applications use water as the heat transfer fluid. The magnum xl offers an inboard roller bearing for even higher radial load capabilities for todays ever increasing demands on our centrifugal pumps. Plan 11 is the default seal flush plan for all single seals. Mechanical seal in a centrifugal pump mechanical seals are the new age sealing product replacing gland packing and old designs associated with it. Installation and operation manual selfpriming centrifugal pumps important. Designed to meet the hygienic requirements of the dairy, food and beverage and personal care industries, lkh centrifugal pumps increase process productivity while providing high efficiency and gentle product handling. How many types of seals are used in a centrifugal pump. Mechanical seal leakage in a centrifugal pump can be a major problem if it is not taken care of swiftly.
1483 1141 75 597 1662 390 1275 49 1004 712 1553 52 1206 171 242 1139 1347 1187 1639 1002 1326 989 29 1003 1435 1304 67 306 1484 91 1136 1233 890 1156 511 1243 726