Taco is a manufacturer of hydronic systems and equipment for residential, light commercial, industrial and oem markets. A mechanical seal is simply a method of containing fluid within a vessel typically pumps, mixers, etc. Seal type the mechanical seal shown in the pump photograph is a type 1 mechanical seal. An eroded, worn, or fretted dynamic oring or gasket as the mechanical seal moves. As previously stated, a pump with a throughshaft is not leakproof. It reduces leakage between the pump and the surroundings to an absolute minimum. Recirculation from pump discharge through flow control orifice to the seal.
What is a double seal and when to use one double seals. Site includes information for hvac designers, engineers, plumbing contractors and consumers. The stationary part of the seal is fitted to the pump housing with a static seal this may be sealed with an oring or gasket clamped between the stationary portion and the pump housing. From the company you trust for the best process pumps in the industry, look to goulds now for the most economical and reliable seal alternatives. Mechanical seal configuration codes for torishima mechanical seals a number and a code indicate the configuration and materials used in each torishima mechanical seal. Mechanical seal selection the spring is in the product.
If you are still in doubt, send a sample seal along with this sheet. 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. 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. The chapter describes mechanical shaft seals used in grundfos pumps as examples of the variety of shaft seal solutions for different.
Sep 23, 2015 centrifugal pump basics how centrifugal pumps work working principle hvacr duration. A few basic components and principles in mechanical seal design contribute to a working seal at the interface of the rotating shaft and stationary pump mixer seal chamber housing. The seals are designed for universal use and fit perfectly into the installation spaces standardised in the chemical industry, e. Seal chamber and stuffing box both refer to a chamber, either integral with or separate from the pump case housing that forms the region between the shaft and casing where sealing media are installed. Mechanical seal technology and selection eagleburgmann.
Mechanical seals the shaft seals used in rotating machinery such as pumps, hydraulic turbines. Recirculation from pump discharge through a flow control orifice and cooler into the seal chamber. The minimum flow requirement for a given refrigeration pump can be established by the following procedure. This document is intended to clarify what to expect on mechanical seals found in colfax products. These seals virtually eliminate leakage of the fluid or gas being handled in pumps or mixers. Mechanical seals for pumps goulds, durco, and more.
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. Unlike an oring seal, the hydraulic diameter of a bellows seal is not a fixed geometric value. On both of the above setups, the installation of a suitable device is required to seal. If the pump begins to stumble even more quickly, the operator should reopen the stop valve and establish a minimum flow requirement via the bypass line. The manufacturer listings are alphabetical, refer to pages 7. Failure of outboard mechanical seal assembly failure of inboard mechanical seal assembly external seal characteristics leak internal seal leak 5. M pumps process srl via dellartigianato, 120 45015 corbola ro italia tel. The product pressure acts additional to the spring on the rotating seal part. Mechanical seal piping plans single seals dual seals plan 62 plan 65a plan 72 plan 74 plan 75 plan 76 fta157eng rev 1214. The seals are classified as h, m or l according to load, with h and m indicating heavy load and l indicating light load. Plan 11 is the default seal flush plan for all single seals. Most common plans and sealing systems plan 53b plan 53c plan 52 used where the pumped product is. Plan 03 plan 65b plan 66a plan 66b what seal flush from pump discharge through orifice. 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.
Increase seal chamber pressure and fluid vapor margin. Numerous material options are available for bushings. What deadended seal chamber with recirculation from seal chamber no flush. The seals are classified as h, m or l according to load, with h and m indicating heavy load and l. If you are unable to identify the seal, it will be necessary for you to. Mechanical seals are usually endface seals or rotatingface seals, but in some designs they can be circumferential or even a hybrid of liptype seals. Double or dual mechanical seals are designed to ensure maximum sealing safety. Introduction the mechanical seal acts as a check valve and a slider bearing. Mechanical seal single mechanical seals spring rotating ring stationary ring. Apart from ensuring the accurate placing of the seal on the pump shaft there is little to be done to compensate for such movement. Mechanical seal applications mechanical seals the shaft seals used in rotating machinery such as pumps, hydraulic turbines, agitators and centrifuges play an important role in maintaining the safety and economic efficiency of machinery. These mechanical seal are a result of two decades of experience in design, manufacture and operation of seals.
Mechanical shaft seals this section briefly describes the design and elements of the mechanical shaft seal. Increase your ability to specify seals to improve mechanical seal reliability mechanical seals for pumps. Size head ring ring bore code notes pump nameplate data mfg. With a lower k value, the safety against thermal overload will increase, but the mechanical seal may also lift off more easily. Mechanical seal education tutorials mechanical seal. Double seals provide a level of safetyzero emissions compliance not possible with single seals. 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. 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.
Gogoal mechanical seal type1 shaft size 1 38 inches replace john crane type11 38 inches for industrial pump and water pump 4. Seal options include packing, single component seals, cartridge lip seals and cartridge single and double mechanical seals. 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. Application guidelines was created as a tool to be used by those who purchase or specify mechanical seals, as well as by the end users of rotating equipment in a wide variety of industries. Containment seal chamber drain for noncondensing leakage. The seat is statically sealed to a nonmoving cover. The double mechanical seals can be provided by fristam in two different arrangements. As a comprehensive manufacturer of pumps, torishima has never lost sight of the importance of.
Mechanical face seal replacement how to use this catalogue locate the manufacturer of the equipment. Clean gasket and flange faces, seal seat cavity, seal head bore and shaft, in particular. Sealing systems for pumpssealing systems for pumps part i. Goulds seal plus sp1 and sp2 are changing all that. Anthony 04547 pentair purex hydrotech l series p28280 pentair sta rite industries aj series u109 93ss pentair sta rite industries dura glas pre 1998 dura glas u109 93ss pentair sta rite industries max e glas pre 1998 u109 93ss pentair sta rite.
Therefore standard mechanical seals are used only for a pressure up to 10 bar. Pump mechanical seal centrifugal, horizontal cn 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. At one half to one third of the best efficiency point, a secondary. Cast iron, ductile iron, steel externals and stainless steel. The outboard or, secondary seal prevents leakage of the flush liquid into the atmoshere. Viking pump a unit of ide corporation cedar falls, ia 2017 section 630 page 630. Because mechanical shaft seal failures are the number one cause of pump downtime, the writer decided to dedicate this column to mechanical seal basics.
The materials of seal construction, particularly the sealing faces and elastomers. Years ago, most pump shafts were sealed using rings of soft packing, compressed by a packing gland, but this type of shaft seal required a fair amount of leakage just to lubricate the packing. A few basic components and principles in mechanical seal design contribute to a working seal at the interface of the rotating shaft and stationary pumpmixer sealchamber housing. Mechanical seals explained the basics mechanical seals are leakage control devices, which are found on rotating equipment such as pumps and mixers to prevent the leakage of liquids and gases from escaping into the environment. At utex, we refer to this type as rs1 the assembly shown in the pump is configured with a.
How to respond to mechanical seal leakage in a centrifugal pump. Mechanical shaft seal types and sealing systems grundfos. Seal basics a mechanical seal is a device used to seal the interface between a rotating shaft and a stationary housing figure 1. Seal water is sarbs pump maintenance seminar, june 7, 2012 minimum discharge pressure 5psi 3bar seal water is the seal face lubricant a 5 psi. Probably the most widely recognized and also most common mechanical seal used in general service, low pressure applications. A mechanical seal is a method of containing fluid within a vessel typi cally pumps where a rotating shaft passes through a stationary hou sing or occasionally. Given the general geometry of a mechanical seal, anywhere that theres a gasket or an oring, there ensues a potential leak point. Dirt or contamination in between the mechanical seals. Change a mechanical seal on the taco ta series pump. This is commonly seen in centrifugal pumps although this challenge also exists in other equipment such as agitators, turbines, compressors, centrifuges, and blowers. Anthony 04547 pentair purex hydrotech l series p28280 pentair sta rite industries aj series u109 93ss pentair sta rite industries dura glas pre 1998 dura glas u109 93ss pentair sta rite industries max e glas pre 1998 u109 93ss. Mechanical seals explained aesseal component seal division. A seal piping plan is designed to improve the environment around the mechanical seal and therefore increase the performance and reliability of the seal.
The seals are arranged by shaft size from smallest to largest. For years, conventional mechanical seals have been used in applications where, often due to cost, cartridge seals were prohibitive. When the sealing is achieved by means of a mechanical seal, the chamber is commonly referred to as a seal chamber. Typically mechanical seals are installed on pumps and mixers. A mechanical seal, figure 1, consists of a stationary member seat. Plan 21 22 plan 02 application where pump fluid does not condense at ambient temperature. The head has a springloaded, highly polished, very flat face that is also frequently pressureloaded against that same seat face.
Pumps with mechanical seals perform more efficiently and undoubtedly have much more reliable performance for extended periods of time. 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. A mechanical seal pump could potentially save you a lot of annual costs. Pump mechanical seal centrifugal, horizontal cn 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 head is statically sealed to and rotates with a pump shaft. This is essential when pumping or mixing a dangerous or toxic substance. Centrifugal pump basics how centrifugal pumps work working principle hvacr duration. This article will explain what a mechanical seal is and the key design features that make them work. The mechanical seal is a precision product and should be handled accordingly. The mechanical seal type series 5kscb2 is available as single cartridge seal, single cartridge seal in quench design and double cartridge seal. The inboard or, primary seal keeps the product in the pump housing. Use care when handling lapped running surfaces of the mechanical seal to ensure they remain clean and are free of chips or scratches. Mechanical seals are designed to overcome these drawbacks. Sealplus mechanical seals goulds pumps pdf catalogs.
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