boiler feed water pump mechanical seal in stock

2023-05-21 21:22:12

We recognize and understand the vital role of boiler feed water pump mechanical seal in their application. With purposes including securely fastening components within systems, and contaminants prevention such as gases and liquids from navigating through enclosed and sealed areas. That is why we offer wholesale boiler feed water pump mechanical seal in different variations and diversities to ensure the integrity and efficiency of systems they will be applied to will function successfully and optimally. The different seals" types available include static that does not move along with other seals and dynamic seals that move collaboratively.

Depending on the industry and selected purpose, we consider boiler feed water pump mechanical seal requirements. Requirements are like pressure, that is pressure changes, to ensure they can withstand and do not deform by the sealed fluid, the load and how it can withstand deflection, dynamics such as the alignment and vibration, and temperature covering the environmental conditions and the heating arising from the friction of the seal operation and fluid movement.

The seals are either bolts, nuts, or washers. Seal bots are commonly used because of their benefits in being reusable, preventing fluids and contaminants from escaping even under high pressure. Nuts are essential on temperature withstanding and compatibility with screws, studs, and bolts, in addition to, easy installation. Moreover, washers can withstand high pressures and are compatible with other seals.

Increased collent flow effected by the pumping screws & the fluid guiding channel combine to force the cold water into the gap between seal ring and mating ring, blowing out gas bubbles and dirt praticles and picking up frictional heat. In view of risk of dynamic distortion because of high sliding velocity of over 25 m/sec the springs are located in the stationary part. For this seal 20,000 hours of continuous running may be viewed as normal. Attainment of over 79000 hours is possible.

HST offers Boiler Feed pumps for high pressure multistage pump mechanical seals Suitable for KSB, Sulzer & KBL Make Pumps, these seals are used in power plants, steel Industries, pharma, oil and gas and sugar industries.

boiler feed water <a href='https://www.ruidapetroleum.com/product/49'>pump</a> mechanical seal in stock

1. Different models of mechanicals seals for a wide variety of Grundfos® pumps, among them: CR(N), NB, NK, CLM, LP, TP, etc. Available in diverse combinations of materials and different diameters: 12, 16, 22, 28, 33, etc. Also mechanical seals for Sarlin®. Division of waster pumps. Available in various materials: silicon-graphite carbide, silicon carbide-silicon carbide; combined with EPDM and FKM elastomers.

2. Mechanical seals are available for different references Gorman-Rupp® pumps. Special models for the transfer of clean water, sewage, oil industry, agriculture and others.

3. Mechanical seals for Fristam® pumps. Wide range of models and materials in the most standard diameters: 22,30 and 35 mm. Different assembly possibilities for the most well-known pump models: FP, FL and FT.

4. Broad range of mechanical seals compatible with Flygt® and Grindex® waste water pumps. These mechanical seals are characterized by their easy and fast installation, without having to make any modification to the pump. Manufactured in stainless steel and in solid tungsten carbide. Special tools are not necessary for their installation.

6. Different designs of mechanical seals for Ebara® pumps, single and double seals in combinations carbide-silicon carbide and graphite-aluminium oxide.

7. Mechanical seals for all types of Calpeda® pumps: centrifugal pumps, multistage, submersible. Different models of mechanical seals in a wide range of materials.

8. Mechanical seals compatible for APV® pumps, among them: Puma, ZMA, ZMB, ZMD, ZMS, ZMH, ZMK. Rosista® and Pasilac®, W and W+. Some designs with wave spring like the special seals for APV Howard® pumps and Crepaco Clean Line®. All of them have been manufactured in materials suitable for working with fluids such as juices, milk and drinks in general.

10. Different models of mechanical seals compatible for Alfa-Laval® pumps series CM, FM, MR, LKH,GM and ALC. Also the models for the range of lobular SSP and SR pumps. Mechanical seals in different combination of materials tungsten carbide, silicon carbide, graphite; combined with different types of elastomers: NBR, EPDM and FKM.

11. Mechanical seals for ABS® submergible pumps specific wastewater treatment. Different models of mechanical seal available: oil chamber mechanical seal and water mechanical seal.

We are a manufacturer. All seals have bulk inventory and can be shipped to you quickly. We promise to ship you in small quantities within 3 days.Advanced technology, excellence, replace original

2. Mechanical seals are available for different references Gorman-Rupp® pumps. Special models for the transfer of clean water, sewage, oil industry, agriculture and others.

6. Different designs of mechanical seals for Ebara® pumps, single and double seals in combinations carbide-silicon carbide and graphite-aluminium oxide.

7. Mechanical seals for all types of Calpeda®pumps: centrifugal pumps, multistage, submersible. Different models of mechanical seals in a wide range of materials.

8. Mechanical seals compatible for APV®pumps, among them: Puma, ZMA, ZMB, ZMD, ZMS, ZMH, ZMK. Rosista®and Pasilac®, W and W+. Some designs with wave spring like the special seals for APV Howard® pumps and Crepaco Clean Line®. All of them have been manufactured in materials suitable for working with fluids such as juices, milk and drinks in general.

11. Mechanical seals for ABS® submergible pumps specific wastewater treatment. Different models of mechanical seal available: oil chamber mechanical seal and water mechanical seal.

Since 2007, the hot-filament Chemical Vapor Deposition (CVD) technology for crystalline diamond thin-film coatings has found its way into the mechanical seal market to combat the problems of dry running, corrosion and abrasion. This new technology has proved successful in hundreds of pumping applications in a wide range of services and duties. The reliability and lifetime of mechanical seals are improved by using diamond-coated faces. One such application involved the sealing of large boiler feed and steam generator pumps in power plants. The duty conditions for the pump’s seals can be as high as pressures up to 580 psig (40 bar), shaft RPMs up to 6,500 and temperatures up to 400˚F (200˚C). Consequently, the mechanical seal faces are highly loaded in a fluid with far less than ideal lubricating qualities. It is evident, therefore, that these applications are technologically challenging for mechanical seal manufacturers not only from a tribological perspective, but also from a corrosion viewpoint when the feed water has a low electrical conductivity or is free of impurities. This paper discusses a new seal-face treatment using hotfilament CVD manufacturing technology tested in a lab for 16,000 hours and currently used in feed pump operations in several power stations in the USA and Europe.

boiler feed water <a href='https://www.ruidapetroleum.com/product/49'>pump</a> mechanical seal in stock

Engineered Mechanical SealsPioneers in the industry, we offer boiler feed pump mechanical seal, boiler feed pump seal, high pressure mechanical seal, vacuum processing unit mechanical seal, tunnel drill machine mechanical seal and extruder mechanical seal from India.

We are a highly acclaimed company for offering boiler feed pump"s mechanical seal to the clients. This mechanical seals are available for any kind of high pressure application, like chemical, water, steam, petrol, diesel, oil & gas etc. Offered product is designed and developed by a team of expert professionals so that they can be easily used in heavy industries. In addition, customers can avail custom-made mechanical seals from us.

We are a highly acclaimed company for offering Boiler feed pump"s mechanical seal to the clients. This mechanical seals are available for any kind of high pressure application, like Chemical, Water, Steam, Petrol, Diesel, Oil & Gas etc. Offered product is designed and developed by a team of expert professionals so that they can be easily used in heavy industries. In addition, customers can avail custom-made mechanical seals from us.

ApplicationBoiler Feed Water Pumps, Oil Pipeline Pumps, HSD Pumps, Booster Pumps, Drip Pumps, Condensate Pumps, Fuel Oil Pumps & High Pressure Pumps Etc.

Incorporated in 2012, Gipfel Engineering is a widely accomplished manufacturer, exporter and service providerof Chemical Process Pumps & Mechanical Seals. Our product line includes Component Mechanical Seal, Bellow Mechanical Seal, and Cartridge Mechanical Seal. Owing to the qualitative fabrication, our range is widely known among the clients for its attributes such as dimensional accuracy, robustness, high tolerance capacity, leakage proofing and longer shelf life. We serve in various process industries including refineries, petrochemicals, food processing, beverage industries, paint industries & pharmaceuticals. Our products with high technology and excellent quality are in all over India with prompt services. We have partnered with the industry"s best vendors, to obtain the machinery used in our production units. Our installation and repairing services are provided by assiduous professionals. All these products are made under the expert guidance to deliver maximum quality to our esteemed client base. We have made a recognizable growth in our domain in by supplying our Chemical Process Pumps & Mechanical Seals all over India.

CHICAGO, March 8, 2016 – John Crane today announced the introduction of the 48VBF, a single cartridge, stationary head O-ring pusher seal that can operate without a cooling water system in critical high temperature pumps. The 48VBF can simplify operations at fossil-fuel steam power plants or at an on-site co-generation plant of a processing or manufacturing site.

The cooler support system is the primary cause of seal failure, which results in the boiler feed water pump shutting down and the boiler going offline. By eliminating the need for the cooler support system, the seal extends time between repairs and avoids unplanned outages. The 48VBF provides a cost saving of more than $20,000 by removing the use of a cooling water system.

The 48VBF incorporates an innovative technology that allows the seal faces to run flatter, which provides better lubrication with less water usage. The robust design also allows for sealing of hot water above the atmospheric boiling point while minimizing leakage. This is ideal for operators who are required to adhere to water consumption regulations.

John Crane (www.johncrane.com) is a global leader in energy solutions, supplying engineered products and services to energy customers and other major process industries. The company designs, manufactures and services a variety of products, including mechanical seals, couplings, bearings, filtration systems and artificial lift equipment. John Crane has more than 230 sales and service facilities in 50 countries. Fiscal year 2015 revenue was $1.414 billion. John Crane is part of Smiths Group (www.smiths.com), a global leader in applying advanced technologies for markets in threat and contraband detection, energy, medical devices, communications, and engineered components.

boiler feed water <a href='https://www.ruidapetroleum.com/product/49'>pump</a> mechanical seal in stock

The type of bearing used depends upon the pump design. Due to the usage of multiple impellers, some axial thrust is transferred to the bearings. Thus a suitable bearing should be chosen to handle both axial and radial thrusts.

The pump shaft is installed through the centre axis of the pump. The impellers, mechanical seals and bearings, are all installed onto the shaft. Shaft keys are used to mechanically connect each impeller to the shaft.

The first centrifugal impeller that the feedwater comes into contact with is referred to as the 1st stage impeller. Fluid flows into the centre eye of the impeller.

The casing must withstand the high system pressures to which it is subjected, as well as high temperatures. A boiler feedwater pump will typically discharge at pressures exceeding several hundred bar (>2900 psi), the casing must be able to withstand this pressure.

Fluid flows into the eye of the impeller and then outwards radially. As fluid moves outwards through the impeller vanes, its kinetic energy is converted to pressure energy. There are three types of centrifugal impeller, these are the closed, partially closed and open types; the type used depends upon what fluid is being pumped.

Tobee® TDG Boiler Feed Water Pumpis a horizontal multi-stage centrifugal pump and suitable for transporting pure water (with the contained foreign matters" content less than 1% and graininess less than 0.1mm) or other liquids of both physical and chemical natures similar to pure water. It is applicable to transport medium with temperature of not higher than 105℃ , and high temperature boiler water or transporting medium similar to hot water. If The TDG pumps add a cooling system with specfice shaft seal and materials, It can be used to transport boiler water, hot water, oil, chemicals or corrosive liquids with the temperature of not higher than 210℃.

• Cooling - When temperature of the liquid transferred is over 80℃, Cooled water should be filled to the water cooling packing gland and shaft seal cooling chamber. Cooled water and seal water should be clean water in normal degree. The pressure of cooled water should be 1.5-3Kg/cm2, pressure of seal water should be more than 0.5-1Kg/cm2 of the seal chamber.

• Shaft seal - Shaft seals are classified as packing seal and mechanical seal. The water seal wat er of packing seal is industrial water, with pressure of 2-3kg/cm2. The flushing water of mechanical seal is softened water, whose pressure shall be 3kg/cm2 higher than the inlet pressure.

boiler feed water <a href='https://www.ruidapetroleum.com/product/49'>pump</a> mechanical seal in stock

They serve to feed a steam generator such as a boiler or a nuclear reactor with a quantity of feed water corresponding to the quantity of steam emitted. Today, all boiler feed pumps are

Until 1950, the average pressure in the outlet cross-section of the pump (discharge pressure of the feed pump) was in the 200 bar region. By 1955 the average discharge pressure had risen to 400 bar. The mass flow rates were in the region of 350 tonnes/h in 1950, compared to 3200 tonnes/h (in some exceptions up to 4000 tonnes/h) today. Boiler feed pumps operate at fluid

Feed pumps for 1600 MW nuclear power stations are constructed for mass flow rates of up to 4000 tonnes/h and feed pump discharge pressures of 70 to 100 bar.

Until 1950 approximately, boiler feed pumps were made of unalloyed steels; since then they have been made of steels with a chrome content of 13 - 14 %. This change of materials was made necessary by the introduction of new chemical feed water compositions. The development of highstrength, corrosion and erosion resistant martensitic chrome steels with good anti-seizure properties as well as the continuous development of all pump components (bearings, shaft seal, pump hydraulic system, etc.) paved the way for present-day boiler feed pumps with rotational speeds of 4500 to 6000 rpm.

The mass flow rates of centrifugal pumps rose rapidly in conjunction with the rise of unit outputs in power stations. Today"s full load feed pumps for conventional 800 to 1100 MW power station units are constructed with four to six stages with stage pressures of up to 80 bar. Feed pumps for 1600 MW nuclear power stations are of the single-stage type.

In the case of conventional power stations above 500 MW full load feed pumps are increasingly driven by steam turbines. In most cases condensing turbines running at 5000 to 6000 rpm are used.

Electric motors usually drive part load feed pumps, both in fossil-fuelled and in nuclear power stations. Speed control of electrically driven feed pumps is effected by either fluid coupling (e. g. variable speed turbo couplings) or by electrical closed-loop control systems by means of thyristors (up to a drive rating of approximately 18 MW in 2011).

The low-speed booster pump is usually driven by the free shaft end of the turbine via a step-down gear or directly by the free end of the electric motor. See Fig. 2 Boiler feed pump

The single or double suction booster pump serves to generate the necessary NPSHR of the system for the high-speed boiler feed pump connected downstream. Fig. 3 Boiler feed pump

Two aspects of deciding between a ring-section and a barrel pull-out pump are described below:The smaller the mass flow rate and the higher the pressure, the higher the material and manufacturing costs of barrel pull-out pumps. This does not apply to the same extent to ring-section pumps.

Barrel pull-out pumps have some advantages over ring-section pumps when it comes to repairing a pump installed in the system. If a rotor has to be replaced, the barrel (see Pump casing) can remain installed in the piping. This is significant with regard to the

In the case of nuclear power stations, single-stage feed pumps with double-entry impeller (see Double-suction pump) and double volute casing are usually adopted. See Fig. 6 Boiler feed pump

Cast pressure-retaining casing parts are increasingly replaced by forged parts. As an example, such a feed pump could be designed with a flow rate of about 4200 m3/h and a head of about 700 m at a rotational speed of 5300 rpm. See Fig. 5 Boiler feed pump

Heads of reactor feed pumps are in the region of 800 m for boiling water reactors and 600 m for pressurised water reactors. The flow rates are about twice as high as those of a comparable boiler feed pump in a fossil-fuelled power station.

For boiler feed pumps two factors have to be considered regarding the wall thickness of the casing: the pressure loads and the different temperature conditions it needs to withstand. These two criteria are satisfied by adopting a high-strength ferritic casing material which enables the wall thickness to be kept thin enough to avoid any overloads as a result of temperature fluctuations, yet of adequate thickness to guarantee the requisite safety against internal pressure.

Barrel casingThe casings of barrel pull-out pumps and barrel casing pumps are usually made of unalloyed or low-alloyed ductile forged steel. Deposit welding is used on all surfaces in contact with the feed water to coat them with corrosion and erosion resistant material.

In order to weld the pump into the piping, an adapter must be provided if the materials of the nozzles to be connected are from different material groups.

The discharge-side (discharge pressure containing) barrel cover is fastened by means of large non-torqued studs. Sealing is provided by a profile joint which is pressurised purely by the prevailing pressure (of up to several 100 bar) without any external forces acting on it. See Fig. 7 Boiler feed pump

Ring-section pumpsThe casings of ring-section pumps are preferably made of forged chrome or carbon steel plated with austenitic (iron solid solution) material.

The sealing element between the individual stage casings (see Stage) seals off by metal-to-metal contact, the individual casings being clamped together axially by tie bolts between the suction and discharge casings (see Pump casing).

A common feature of barrel pull-out pumps and ring-section pumps is that the greater the wall thickness, the greater the thermal stress caused by thermal shocks, which in turn reduces the service life of the pump. The provision of injection water at a pressure situated between the suction and discharge pressure of the pump is a frequent requirement. This is taken care of by tapping water from one of the pump stages of both barrel pull-out pumps and ring-section pumps.

Tapping a stage of a boiler feed pumpIn the case of ring-section pumps, a partial flow at an intermediate pressure can easily be tapped through a tapping nozzle in one of the stage casings.

In the case of barrel pull-out pumps, the inside of the barrel is divided into three pressure zones so that a partial flow at the required intermediate pressure can be led off directly to the outside. See Fig. 4 Barrel pull-out pump

The sealing function is taken care of by a profile joint between the discharge and the tapping pressure, and by a metal-to-metal joint between the tapping and the inlet pressure. See Fig. 7 Boiler feed pump

The pump shaft of boiler feed pumps has a very small static deflection as the bearings are spaced as closely as possible, the shaft diameter is relatively large and thevibrations and runs smoothly (seeAxial thrust) which have to be absorbed by the balancing device.

The rotors of single-stage reactor feed pumps are even stiffer than those of boiler feed pumps, and their static deflection is smaller than that of multistage boiler feed pumps.

The magnitude of this axial thrust depends on the position of the operating point, on the characteristic curve, the rotational speed and the amount of wear on the internal clearances (see Controlled gap seal). Additional disturbing forces can arise in the event of abnormal operating conditions, e.g. cavitation.

On larger boiler feed pumps the axial forces at the pump rotor are balanced by means of a hydraulic balancing device through which the fluid handled flows. The balancing device is often combined with an oil-lubricated thrust bearing (see Plain bearing). As this balancing device absorbs more than 90 % of the axial thrust, a relatively small thrust bearing can be used. The balancing device may comprise a balance disc with balance disc seat, or a balance drum or double drum with the corresponding throttle bushes.

Axial thrusts arising in reactor feed pumps with double-entry impeller (see Double-suction pump) are balanced hydraulically; residual thrusts are absorbed by an oil-lubricated thrust bearing. See Fig. 6 Boiler feed pump

Radial forces arise from the weight of the rotor, mechanical unbalance or hydraulic radial thrust. The radial forces are balanced by two oil-lubricated radial bearings as well as by throttling clearances through which the fluid handled flows in axial direction. Such throttling clearances are located at the impeller neck on the impeller inlet side, or in the case of multistage boiler feed pumps for conventional power stations on the discharge side of the impeller (interstage bush) and at the balance drum. If the rotor is in an off-centre position, a re-centring reaction force will be generated in these clearances, which largely depends on the pressure difference and the clearance geometry (LOMAKIN effect).

The LOMAKIN effect is severely reduced when, due to abnormal operating conditions, the feed water in the clearance is not in a purely liquid phase (see Cavitation).

The hydrostatic action of the clearances contributes more to reducing shaft deflection than the mechanical stiffness does. The system is designed in such a way that operating speed always remains well away from the critical speed of the rotor, allowing hydraulic exciting forces (particularly in low flow operation) to be absorbed in addition.

Common shaft seals for boiler feed pumps are mechanical seals, floating ring seals and labyrinth seals. Gland packings are less common these days. (Also see Shaft seal).

Transient or low flow operating conditions cause additional loads on boiler feed pumps. This leads to additional stresses and strains as well as to deformation of components with various consequences on their functionality.

Nowadays, almost all boiler feed pumps must be able to handle both cold starts (high-temperature shock loads) and semi-warm starts without any damage. In these start-up procedures hot feed water abruptly flows into the cold pump, which results in the inner components heating up much faster than the pressure boundary. Depending on the frequency of starts and the gradient curves of pressure and temperature (load cycles) this can shorten the service life of the pump.

Contact between parts of thestator cannot, generally, be ruled out as narrow clearances are used as controlled gap seals This applies to the impeller neck on the impeller inlet side, the discharge-side clearance between impeller,

In operating conditions with a very low or zero flow, e.g. in the turning gear mode of a turbine-driven boiler feed pump, temperature layers establish in the fluid handled, which may cause deformation of the rotors and, after a slight delay, also of the non-rotating components. Once the clearance gaps are closed the rotor will be subjected to a significantly higher friction moment, leading to overload of the turning gear and to standstill of the pump. In this case, the temperature will no longer be equalised at the rotor, which will further aggravate the rotor deformation.

This can result in several hours of downtime for the pump. Usually the only remedy is to let the machine cool down to reduce or eliminate the critical temperature layers and the deformation.

Avoid large differences in temperature in and on the pumpThermally separate the cold areas (shaft seal area) from the area through which the hot fluid passes (hydraulic system and balancing device) by means of an insulation chamber system; provide a thermal seal to prevent convection flows and special thermosleeves.

The above measures are frequently used for barrel casing pumps (barrel pull-out pumps) as their outer dimensions, wall thickness, drive (turbine with turning gear) and operating modes are considered more critical than those of ring-section pumps. If possible, these measures are always automated to safeguard the availability of the pump set.

A minimum flow valve (automatic recirculation valve) ensures a minimum flow rate and thus prevents damage which could occur in low flow operation as a result of either an impermissible increase in temperature leading to vaporisation of the pump content or low flow cavitation.

boiler feed water pump mechanical seal in stock

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