Sealing systems for pumpssealing systems for pumps part i. How to change a seal on a single stage centrifugal pump. This nuber is also the catalog number for the pump. Whether the pump is part of a brand new installation or is a replacement for an existing pump with an external seal. Introduction to failures failure of the mechanical shaft seal is the most common cause of pump downtime.
Berkeley b54585, model b3tpms, closecoupled centrifugal pump. Never put hands on lapped seal faces or put lapped seal parts face down on the workbench. Failure to observe the instructions contained in this manual could result in personal injury and. Seal basics a mechanical seal is a device used to seal the interface between a rotating shaft and a stationary housing figure 1.
How to respond to mechanical seal leakage in a centrifugal pump. When the sealing is achieved by means of a mechanical seal, the chamber is commonly referred to as a seal chamber. Introduction the mechanical seal acts as a check valve and a slider bearing. Mechanical sealcentrifugal pumpby rajul gupta pump. 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. Prerequisites there are no prerequisites for this class. This article will explain what a mechanical seal is and the key design features that make them work.
Goulds 3ms1h2a4, centrifugal pump, series mcs, 3 hp, 208. This copy of the manual is a translation of the italian version and both. A mechanical seal is a method of containing fluid within a vessel pumps, mixers. Fault detection signal for mechanical seal of centrifugal pump. Next week we will look at the materials of construction of hvac centrifugal pump seals.
Main seal is high wearing hard alloy mechanical seal that is with a long life. 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. The mechanical seals help sealing the rotating part of the shaft against the stationary part of the pump housing. Plan 11 is the default seal flush plan for all single seals. The materials of seal construction, particularly the sealing faces and elastomers. Berkeley b54585, model b3tpms, closecoupled centrifugal pump, b series, 1 hp, 230 volts, 1 phase, 1800 rpm, 3 npt discharge, cast iron impeller, mechanical seal. 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. 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. Pump mechanical seal centrifugal, horizontal, lined cl seal m series user manual this copy of the manual is a translation of the italian version and both manuals must be always furnished together model. The mechanical engineers spend their time comparing the various claims of the pump manufacturers, trying desperately to relate the theory learned.
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. Request pdf fault detection signal for mechanical seal of centrifugal pump mechanical seals are one of main components of high speed centrifugal pumps. Doc how much, if at all, mechanical seals do, must or must not leak is a controversial subject for which there are few clear answers. 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. A few basic components and principles in mechanical seal design contribute to a working seal at the interface of the rotating shaft and stationary pumpmixersealchamber housing. Mechanical sealcentrifugal pump by rajul gupta free download as powerpoint presentation. Mechanical seals for pumps goulds, durco, and more.
The meaning of each digit in the product code number is shown below. Read on for a basic understanding of mechanical seals, and how they differ from packing. If the centrifugal pump flow is too high or too low hydraulic disturbances will be present that can change the pumped fluid pressure andor temperature. A mechanical seal is simply a method of containing fluid within a vessel typically pumps, mixers, etc. This allows the stuffing box to be replaced without requiring a new mechanical seal. Mechanical seal chamber can also accommodate api682 seals. Checklist of problems vvith centrifugal pumps and their causes. 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. The most effective method of preventing the leakage of the fluid from the centrifugal pump to the external surroundings is using the mechanical seals. Pump mechanical seal centrifugal, horizontal, lined cl sealm series user manual this copy of the manual is a translation of the italian version and both manuals must be always furnished together model. This articles describes some of the commonly used mechanical seal types like cartridge type mechanical seals, balanced type, unbalanced type, conventional, pusher, and nonpusher type of mechanical seals.
T fire pumps mfg has been designing and building reliable, high quality portable fire. The mechanical seal employs a contacttype design to seal the centrifugal pumps shaft where it passes through the pump casing see shaft seal. Scribd is the worlds largest social reading and publishing site. The mechanical seal mechanical seals have the purpose of preventing leakage of a fluid liquid or gaseous through the clearance between a shaft and the fluid container. The mechanical seal is the pump component exposed to the most intensive wear. Keep the mechanical seal in its original container until ready for installation. A mechanical seal consists of 2 principle components. Sep 23, 2015 centrifugal pump seals, mechanical seal installation tutorial by kevin ging duration. Fluid enters a centrifugal pump through the suction nozzle at the center of a rotating impeller.
Pump mechanical seal centrifugal pump spare parts xbsy. When the sealing is achieved by means of a mechanical seal, the chamber is. Pdf analysis of mechanical seals for highspeed centrifugal gas. Since the majority of mechanical seal applications use the pumped fluid in the seal chamber, the seal chamber pressure andor temperature will be affected. Step 4 precision alignment with a dial indicator duration. Every centrifugal pump must accommodate a spinning shaft while mechanically maintaining fluid or gas contained in the wet end of the pump. Loosely inserted seal face provides selfadjusting capability. 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.
A mechanical seal, figure 1, consists of a stationary member seat. As a result, the quality and durability of a mechanical seal have a major influence on the. This is commonly seen in centrifugal pumps although this challenge also exists in other equipment such as agitators, turbines, compressors, centrifuges, and blowers. If you are still in doubt, send a sample seal along with this sheet. When sealing a centrifugal pump, the challenge is to allow a rotating shaft to. Custom mechanical seal options can be provided for specific. With our free email newsletter excellence in practice, you will receive firsthand information about current products, services, references and worthwhile industry insights. Goulds 3ms1h2a4, centrifugal pump, series mcs, 3 hp, 208230. 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. Pdf a study aimed at seal selection efficiency for centrifugal pumps in the oil and gas industry is presented. The mechanical seal employs a contacttype design to seal the centrifugal pump s shaft where it passes through the pump casing see shaft seal. Cps ceramic lined double mechanical seal centrifugal pump is engineered to meet the most stringent quality standards and ensure reliability and utmost safety in production operations. Mechanical seals the shaft seals used in rotating machinery such as pumps, hydraulic.
Seal chamber pressure an overview sciencedirect topics. Most mechanics spend their time at work time greasing and changing bearings, changing pump packing, and mechanical seals. Jul 10, 2017 whether the pump is part of a brand new installation or is a replacement for an existing pump with an external seal. After nearly six years of intensive work, the american petroleum institute api 682 mechanical seal standard is soon to be adopted.
After sealing design of centrifugal pump, its mechanical seal is improved greatly, and improve the efficiency of the centrifugal pump. This document is intended to clarify what to expect on mechanical seals found in imo pump products. Centrifugal pump seals, mechanical seal installation tutorial by kevin ging duration. 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. Ceramic lined double mechanical seal centrifugal pump. The shaft seal is exposed to widely varying operating conditions. Mechanical seals are usually endface seals or rotatingface seals, but in some designs they can be circumferential or even a hybrid of liptype seals. In every pump, the mechanical seal is one of the most important components.
Mechanical seals for pumps how mechanical seals work. How to replace mechanical seals in centrifugal pumps. Typically mechanical seals are installed on pumps and mixers. Loud blow is heard each time pump is started or stopped 20. Suitable for many different fluids in a variety of industries and processes, it is capable of handling low, medium. Since its introduction in 1994, api 682 has become the standard that sets the global tone for the procurement and operation of seal and supply systems for centrifugal pumps in the oil and gas sector as well as in the petrochemical industry. Procedure to change a seal on a single stage centrifugal pump c. There are various types and arrangement of the mechanical seals being used for the centrifugal pumps. 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. Mechanical shaft seal types and sealing systems grundfos. The chapter describes mechanical shaft seals used in grundfos pumps as examples of the variety of shaft seal solutions for different.
Internally flushed seals require less service and help extend the life of the pump. Tkk high pressures series are horizontally and between bearings mounted. Sometimes operating conditions change to become quite different from the specific conditions for which the seal was intended. Read the entire how to pick an hvac centrifugal pump series. Another benefit of the double seal is the ability to remove the cartridge from the pump and then place it back into operation. This is commonly seen in centrifugal pumps although this challenge also exists in other equipment such as agitators, turbines, compressors, centrifuges, and. This document is intended to clarify what to expect on mechanical seals found in colfax products. Centrifugal pump mechanical design, analysis, and testing. Centrifugal pumps wate tc 9 4 ordering information 9 nominal impeller diameter pump model volute design rotation shaft seal fit impeller material model description order no.