Mechanical seals technical manual brenner industrial sales. Berkeley b54585, model b3tpms, closecoupled centrifugal. This seal design was amount the first single spring seals and proceeded the slightly less expensive type 21 seals. Motoku water pump mechanical seal for suzuki lt250r quadracer ltz400 quadsport gsxr600 gsxr750 gsxr1100. 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. Sealing systems for pumpssealing systems for pumps part i presented by. The chapter describes mechanical shaft seals used in grundfos pumps as examples of the variety of shaft seal solutions for different. Mechanical shaft seal types and sealing systems grundfos. Mechanical seals are usually endface seals or rotatingface seals, but in some designs they can be circumferential or even a hybrid of liptype seals. A balanced, radially split end face mechanical seal that has seal faces, gaskets, and setting devices unitized into two semicartridge components. Installation of the new proflo seals covered single spring seal. On both of the above setups, the installation of a suitable device is required to seal.
The rotating face is connected to the rotating shaft while the. 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. 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. Figure 1 shows a typical centrifugal pump, which highlights its constituent parts, including the mechanical seal. Mechanical seal technology and selection eagleburgmann. As previously stated, a pump with a throughshaft is not leakproof. Often, but not always, pumping systems contain a coupling, which attaches the driver to the rotary shaft of the pump. Mechanical seals for pumps how mechanical seals work. Seal end view piping plan layout what, why, and where pump crosssection mechanical seal preventative maintenance viewed from drive end shows preferred gland connection orientation illustrated schematic of auxiliary components describes piping plans, their purpose, and typical applications simplified centrifugal. Viscous and sticky products creamy products, ointments, cosmetics, gels, etc determining the mechanical seal design and the appropriate materials for each application is. The inboard or, primary seal keeps the product in the pump housing. Mechanical seals the shaft seals used in rotating machinery such as pumps, hydraulic turbines.
Improving the reliability of mechanical seals peerless pump. All are designed for a wide variety of services, ranging from water and wastewater, to chemical. As a comprehensive manufacturer of pumps, torishima has never lost sight of the importance of. Double or dual mechanical seals are designed to ensure maximum sealing safety.
Plan 11 is the default seal flush plan for all single seals. 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. 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 shaft seals this section briefly describes the design and elements of the mechanical shaft seal. The mechanical shaft seal is essentially a throttle arranged around the shaft. 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. Change a mechanical seal on the taco ta series pump. The outboard or, secondary seal prevents leakage of the flush liquid into the atmoshere. It reduces leakage between the pump and the surroundings to an absolute minimum. 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.
Every centrifugal pump must accommodate a spinning shaft while mechanically maintaining fluid or gas contained in the wet end of the pump. The seals are arranged by shaft size from smallest to largest. This document is intended to clarify what to expect on mechanical seals found in colfax products. There are more complex designs with double, tandem or other arrangements which place a. Taperedbore seal chambers promechanical seal basics mechanical seals provide a seal between a pump casing and a rotating shaft. 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. At utex, we refer to this type as rs1 the assembly shown in the pump is configured with a. In a single type mechanical seal pump, this liquid is normally the fluid being handled by the pump. The double mechanical seals can be provided by fristam in two different arrangements. The shaft seal is exposed to widely varying operating conditions.
A seal piping plan is designed to improve the environment around the mechanical seal and therefore increase the performance and reliability of the seal. Seal basics a mechanical seal is a device used to seal the interface between a rotating shaft and a stationary housing figure 1. When the sealing is achieved by means of a mechanical seal, the chamber is. Loosely inserted seal face provides selfadjusting capability. 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. Unlike an oring seal, the hydraulic diameter of a bellows seal is not a fixed geometric value. Most common plans and sealing systems plan 53b plan 53c plan 52 used where the pumped product is. The main parts of the mechanical seals are please refer the figure above.
While this description is simple, it is a significant engineering challenge. 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 mechanical seal type series 5kscb2 is available as single cartridge seal, single cartridge seal in quench design and double cartridge seal. Introduction to failures failure of the mechanical shaft seal is the most common cause of pump downtime. Interchangeability completely interchangeable with the goulds model 3196 and extended pump life. Goulds seal plus sp1 and sp2 are changing all that. Internal structure of pump a pump is a machine that works to move fluids, as in lifting a liquid to its inside. Seal type the mechanical seal shown in the pump photograph is a type 1 mechanical seal. Mechanical seal installation location in pump a mechanical seal is installed on the. 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. This is essential when pumping or mixing a dangerous or toxic substance. Sealing systems for pumpssealing systems for pumps part i. The following are example uses of a mechanical seal in a pump.
For years, conventional mechanical seals have been used in applications where, often due to cost, cartridge seals were prohibitive. Sealplus mechanical seals goulds pumps pdf catalogs. Taco is a manufacturer of hydronic systems and equipment for residential, light commercial, industrial and oem markets. Failure to observe the instructions contained in this manual could result in personal injury and.
A mechanical seal, figure 1, consists of a stationary member seat. Recirculation from pump discharge through flow control orifice to the seal. Mechanical seals ekk technologies eagle industry co. Piping plans help keep mechanical seals running cool and clean, promote safe handling of dangerous fluids, and extend the operational availability of rotating equipment. 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. New equipment operations startups can be particularly hard on mechanical seals, which is why it is critical to ensure that the pump seal chamber is filled.
The seal ring which rotates with the shaft is called the rotary ring. Packing although mechanical seals had been around for many decades, by 1955 industry had converted only a small. 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 industries plbc series 17351 0102s. Because mechanical shaft seal failures are the number one cause of pump downtime, the writer decided to dedicate this column to mechanical seal basics. 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. Probably the most widely recognized and also most common mechanical seal used in general service, low pressure applications. If you are unable to identify the seal, it will be necessary for you to. The rotating and the fixed faces are the two vital parts of the mechanical seals. The seals are classified as h, m or l according to load, with h and m indicating heavy load and l indicating light load. The manufacturer listings are alphabetical, refer to pages 7. 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. John crane is an american company, now a subsidiary of smiths group and provider of engineered products and services including mechanical seals, couplings, seal support systems, filtration systems and.
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. This is commonly seen in centrifugal pumps although this challenge also exists in other equipment such as agitators, turbines, compressors, centrifuges, and. Uxcell s14072500am4739 universal oil resistant water. Mechanical face seal replacement how to use this catalogue locate the manufacturer of the equipment. 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. With a lower k value, the safety against thermal overload will increase, but the mechanical seal may also lift off more easily. The seals are designed for universal use and fit perfectly into the installation spaces standardised in the chemical industry, e. The materials of seal construction, particularly the sealing faces and elastomers. Double seals provide a level of safetyzero emissions compliance not possible with single seals. Multispring seal double, double cartridge seal, reservoirs and wave spring seal protected spring. 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.
These seals virtually eliminate leakage of the fluid or gas being handled in pumps or mixers. A must read for all engineers, pump and seal professionals, end users, consulting engineers, distributors, and pump oems. Mechanical seal configuration codes for torishima mechanical seals a number and a code indicate the configuration and materials used in each torishima mechanical seal. High performance, high temperature cartridge mechanical seals are available from nearly all manufacturers for optimum sealing reliability. Increase your ability to specify seals to improve mechanical seal reliability. Typically mechanical seals are installed on pumps and mixers.