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Monday, December 26, 2011
Saturday, December 17, 2011
API standards and Modification
A quick check of existing pump standards will reveal that there are a variet. The list includes:
Hydraulic Institute Standards
American National Institute Standards for Chemical Pumps :
B73.1 for Horizontal type.
B73.2 for Vertical Inline
API 610 for centrifugal Pumps
API 674 for Reciprocating Pumps
API 675 for Controlled Volume Pumps
API 676 for Rotary Positive Displacement Pumps
ISO aimed at the medium duty single stage pumps ( Metric)
DIN. West German standard
VDMA West German standard for pump seals.
There are at least two problems with these standards:
They were written for pumps equipped with jam packing. Most of the standards were written in the nineteen fifties at a time when mechanical seals were not popular. In those days we had a lack of the modern materials that make mechanical seals practical. As an example Viton® was not invented until 1958 and did not come into general use until the sixties. Kalrez® did not come out until 1975 and in the eighties the duplex metals came into their own.
The customer believes that by purchasing a standard design he's getting a good pump. Customers have the same problem with pump efficiency. They believe there is a correlation between efficiency and the quality of the pump. Needless to say there is none! Problems caused by these standards are reflected in continual poor seal performance. The fact of the matter is that these standards reflect only an attempt to standardize envelope (outside) dimensions, nothing more!
Unfortunately standardizing the length of pumps ,prevented manufacturers from designing short shafts that were not prone to the bending problems associated with low cost A.N.S.I. and I.S.O. design pumps, operating off of their best efficiency point (B.E.P).
Here is a list of some of the modifications you should make to your standard A.N.S.I. or I.S.O. pump, if you want to get good mechanical seal and bearing life. Unless you are prepared to upgrade the pump, seal and bearing life will always be less than desirable
WHAT TO MODIFY
The stuffing box bore is too small for mechanical seals. In most cases there's not enough material to bore out, so you'll have to make, or purchase a replacement part. Most of these standard stuffing boxes were designed for 3/8" or 10 mm. packing. You need at least 1" (25 mm.) radial clearance to take advantage of centrifugal force throwing solids away from the seal faces.
When using mechanical seals, install a recirculation line from the bottom of the stuffing box back to the suction of the pump. Try to tap the box as close to the face as possible to insure good circulation. Most high quality cartridge seals come with this connection already installed in the gland.
Because packing needs lubrication, the pump came equipped with a recirculation pipe from the discharge side of the pump to the stuffing box lantern ring connection. If you install a large sealing chamber in place of the narrow packing stuffing box that came as original equipment, you should be able to eliminate almost all need for clean flushing liquid in the seal area. One exception to this is if you're pumping a fluid close to its vaporization point. In that instance you don't want to lower stuffing box pressure because of the possibility of vaporizing the fluid in the stuffing box and possibly blowing open the seal faces
Convert to cartridge or split seals to insure correct seal installation and allow you to make important impeller settings in "back pull out," or other types of pump designs.
If you're using single stage centrifugal pumps, convert to solid shafts with a low L3/D4 ratio to resist shaft bending. The back pull out design was made for easy sleeve removal. If you're using good mechanical seals, corrosion resistant shaft materials and labyrinth oil seals, there should be no need to replace pump shafts.
Pump manufacturers are not required to provide L3/D4 ratio numbers that would predict shaft bending problems with their pump. The relationship between shaft size and shaft diameter is expressed in the ratio L3/D4. Try to keep tghis number below 60 (2.5 Metric)
"L" is the distance from the center of the inboard bearing to the center of the impeller (inches).
"D" is the diameter of the shaft (under the sleeve if there is one), in the stuffing box area.(inches).
Substitute labyrinth or positive face seals for the lip or grease seals that are installed in the bearing case. They will not only do a better job of keeping contaminants out of the bearing oil/grease, but they will not damage the expensive shaft. These labyrinth seals also make sense in the motors to eliminate moisture from damaging the windings and contaminating the lubricating grease.
Use only non- fretting mechanical seals. Shafts are too costly not to pay attention to this.
The easiest way to get pump/motor alignment is with a "C" (inch) or "D" (metric) frame adapter. If you elect not to use the adapter you're in for a long process aligning the pump and driver correctly, and unless you are using split mechanical seals, you are going to have to go through the procedure each time you change seals. You should be able to get the C or D frame adapter as part of your next power frame change or upgrade.
Convert to a "center line" wet end if you're pumping liquids in excess of 200 degrees Fahrenheit (100 Centigrade) It'll allow the suction flange to expand without causing pipe strain and wear ring damage.
Do not use a vent on the bearing cavity of the pump. Each time the pump stops, the vent will allow moisture to enter the bearing cavity as the oil cools down (this is called aspiration). You're much better off positively sealing the casing with a mechanical seal and installing an expansion chamber on the top of the casing to allow for air expansion.
If you intend to use a closed impeller, end suction, centrifugal pump, try to convert to a design that has adjustable wear rings.
Install a sight glass to be sure that the oil level is at the correct height. Too much oil is as bad as not enough. If you have a positive pressure oil mist system, be sure that it does not vent to atmosphere. Oil mist systems require mechanical seals outboard of the bearings to prevent atmosphere contamination. If you have installed labyrinth seals, they will almost guarantee the correct oil level because excess oil will spill out of the labyrinth.
Coat the inside of the bearing case with a suitable protective covering to prevent rusting and the leaching out of harmful substances from the bearing casting.
Install magnetic plugs into the bottom of the bearing casing to attract loose metal shavings that would damage the bearings.
Specify double volute designs any time the impeller diameter is 14" (356 mm.) or greater to prevent shaft deflection. Smaller size pumps do not lend themselves to this modification.
Convert to a "vortex" pump volute any time you are pumping liquid that contains lots of solids. Although the pump efficiency will be lower than conventional designs, the increased service life will more than compensate.
At overhaul time, substitute a medium or heavy weight power end for the light weight version that came with the pump and get most of the features we have discussed. Medium and heavy weight power ends are available for most popular pump brands.
In addition to these modifications, here are some recommendations that will help to insure good seal and bearing life.
Since a seal failure is the most common reason for shutting down a pump, install a back up seal and convection tank to prevent unexpected shut downs.
Change the bearing oil on a regular basis. Contact your favorite oil supplier for his recommendation and then follow his advice. If the inside of the bearing frame has been coated with a protective material to prevent rusting, avoid synthetic oils as their detergent action can often damage these protective coatings.
Maintain the proper oil level. Too much is just as bad as not enough.
Trim the impeller to obtain operation at the B.E.P. Throttling the pump discharge is not the same thing.
If you are using open impellers, keep them adjusted to the correct clearance.
Install bearings by expanding the bore with an induction coil. Heating the bearing in a pan of warm oil is not a good idea because the oil can easily be contaminated.
Install pressure gages on the suction and discharge of the pump. This is the only way to tell if the pump is running near its B.E.P.
Avoid canned or magnetic drive pumps if the pumping fluid contains solids, or if it is a poor lubricant.
Pumps equipped with a "repeller" and some sort of static seal can usually be converted to a good mechanical seal. The problem with the repeller design is that in most of the configurations, the seal faces are designed to open when the pump is running and then close on any solids as the pump stops. The rule with mechanical seals is a simple one, "keep the seal faces together." Don't open them on purpose
Hydraulic Institute Standards
American National Institute Standards for Chemical Pumps :
B73.1 for Horizontal type.
B73.2 for Vertical Inline
API 610 for centrifugal Pumps
API 674 for Reciprocating Pumps
API 675 for Controlled Volume Pumps
API 676 for Rotary Positive Displacement Pumps
ISO aimed at the medium duty single stage pumps ( Metric)
DIN. West German standard
VDMA West German standard for pump seals.
There are at least two problems with these standards:
They were written for pumps equipped with jam packing. Most of the standards were written in the nineteen fifties at a time when mechanical seals were not popular. In those days we had a lack of the modern materials that make mechanical seals practical. As an example Viton® was not invented until 1958 and did not come into general use until the sixties. Kalrez® did not come out until 1975 and in the eighties the duplex metals came into their own.
The customer believes that by purchasing a standard design he's getting a good pump. Customers have the same problem with pump efficiency. They believe there is a correlation between efficiency and the quality of the pump. Needless to say there is none! Problems caused by these standards are reflected in continual poor seal performance. The fact of the matter is that these standards reflect only an attempt to standardize envelope (outside) dimensions, nothing more!
Unfortunately standardizing the length of pumps ,prevented manufacturers from designing short shafts that were not prone to the bending problems associated with low cost A.N.S.I. and I.S.O. design pumps, operating off of their best efficiency point (B.E.P).
Here is a list of some of the modifications you should make to your standard A.N.S.I. or I.S.O. pump, if you want to get good mechanical seal and bearing life. Unless you are prepared to upgrade the pump, seal and bearing life will always be less than desirable
WHAT TO MODIFY
The stuffing box bore is too small for mechanical seals. In most cases there's not enough material to bore out, so you'll have to make, or purchase a replacement part. Most of these standard stuffing boxes were designed for 3/8" or 10 mm. packing. You need at least 1" (25 mm.) radial clearance to take advantage of centrifugal force throwing solids away from the seal faces.
When using mechanical seals, install a recirculation line from the bottom of the stuffing box back to the suction of the pump. Try to tap the box as close to the face as possible to insure good circulation. Most high quality cartridge seals come with this connection already installed in the gland.
Because packing needs lubrication, the pump came equipped with a recirculation pipe from the discharge side of the pump to the stuffing box lantern ring connection. If you install a large sealing chamber in place of the narrow packing stuffing box that came as original equipment, you should be able to eliminate almost all need for clean flushing liquid in the seal area. One exception to this is if you're pumping a fluid close to its vaporization point. In that instance you don't want to lower stuffing box pressure because of the possibility of vaporizing the fluid in the stuffing box and possibly blowing open the seal faces
Convert to cartridge or split seals to insure correct seal installation and allow you to make important impeller settings in "back pull out," or other types of pump designs.
If you're using single stage centrifugal pumps, convert to solid shafts with a low L3/D4 ratio to resist shaft bending. The back pull out design was made for easy sleeve removal. If you're using good mechanical seals, corrosion resistant shaft materials and labyrinth oil seals, there should be no need to replace pump shafts.
Pump manufacturers are not required to provide L3/D4 ratio numbers that would predict shaft bending problems with their pump. The relationship between shaft size and shaft diameter is expressed in the ratio L3/D4. Try to keep tghis number below 60 (2.5 Metric)
"L" is the distance from the center of the inboard bearing to the center of the impeller (inches).
"D" is the diameter of the shaft (under the sleeve if there is one), in the stuffing box area.(inches).
Substitute labyrinth or positive face seals for the lip or grease seals that are installed in the bearing case. They will not only do a better job of keeping contaminants out of the bearing oil/grease, but they will not damage the expensive shaft. These labyrinth seals also make sense in the motors to eliminate moisture from damaging the windings and contaminating the lubricating grease.
Use only non- fretting mechanical seals. Shafts are too costly not to pay attention to this.
The easiest way to get pump/motor alignment is with a "C" (inch) or "D" (metric) frame adapter. If you elect not to use the adapter you're in for a long process aligning the pump and driver correctly, and unless you are using split mechanical seals, you are going to have to go through the procedure each time you change seals. You should be able to get the C or D frame adapter as part of your next power frame change or upgrade.
Convert to a "center line" wet end if you're pumping liquids in excess of 200 degrees Fahrenheit (100 Centigrade) It'll allow the suction flange to expand without causing pipe strain and wear ring damage.
Do not use a vent on the bearing cavity of the pump. Each time the pump stops, the vent will allow moisture to enter the bearing cavity as the oil cools down (this is called aspiration). You're much better off positively sealing the casing with a mechanical seal and installing an expansion chamber on the top of the casing to allow for air expansion.
If you intend to use a closed impeller, end suction, centrifugal pump, try to convert to a design that has adjustable wear rings.
Install a sight glass to be sure that the oil level is at the correct height. Too much oil is as bad as not enough. If you have a positive pressure oil mist system, be sure that it does not vent to atmosphere. Oil mist systems require mechanical seals outboard of the bearings to prevent atmosphere contamination. If you have installed labyrinth seals, they will almost guarantee the correct oil level because excess oil will spill out of the labyrinth.
Coat the inside of the bearing case with a suitable protective covering to prevent rusting and the leaching out of harmful substances from the bearing casting.
Install magnetic plugs into the bottom of the bearing casing to attract loose metal shavings that would damage the bearings.
Specify double volute designs any time the impeller diameter is 14" (356 mm.) or greater to prevent shaft deflection. Smaller size pumps do not lend themselves to this modification.
Convert to a "vortex" pump volute any time you are pumping liquid that contains lots of solids. Although the pump efficiency will be lower than conventional designs, the increased service life will more than compensate.
At overhaul time, substitute a medium or heavy weight power end for the light weight version that came with the pump and get most of the features we have discussed. Medium and heavy weight power ends are available for most popular pump brands.
In addition to these modifications, here are some recommendations that will help to insure good seal and bearing life.
Since a seal failure is the most common reason for shutting down a pump, install a back up seal and convection tank to prevent unexpected shut downs.
Change the bearing oil on a regular basis. Contact your favorite oil supplier for his recommendation and then follow his advice. If the inside of the bearing frame has been coated with a protective material to prevent rusting, avoid synthetic oils as their detergent action can often damage these protective coatings.
Maintain the proper oil level. Too much is just as bad as not enough.
Trim the impeller to obtain operation at the B.E.P. Throttling the pump discharge is not the same thing.
If you are using open impellers, keep them adjusted to the correct clearance.
Install bearings by expanding the bore with an induction coil. Heating the bearing in a pan of warm oil is not a good idea because the oil can easily be contaminated.
Install pressure gages on the suction and discharge of the pump. This is the only way to tell if the pump is running near its B.E.P.
Avoid canned or magnetic drive pumps if the pumping fluid contains solids, or if it is a poor lubricant.
Pumps equipped with a "repeller" and some sort of static seal can usually be converted to a good mechanical seal. The problem with the repeller design is that in most of the configurations, the seal faces are designed to open when the pump is running and then close on any solids as the pump stops. The rule with mechanical seals is a simple one, "keep the seal faces together." Don't open them on purpose
Sunday, December 11, 2011
Monday, November 21, 2011
Optimize Solution - Service at Glance.mp4
hi guys check out services offer by optimize solution. With 3 min we will cover all our service in a simplied manner. No need of catalogue no need keep literature folder, just logg on to these blogs and see the things online and order your pumpset or send enquiry.
Please visit our website www.optimizesolution.vze.com
regards
Sunday, November 13, 2011
Company Presentation
Optimize Solution is your partner in making profit by providing your plant reliable, robust, high performance, low life cycle cost pumpset with economically viable initial cost of purchase.
Regards
Bhalchandra Padwal
Business Development Manger
00919967787080
www.optimizesolution.vze.com
Tuesday, November 1, 2011
Monday, October 31, 2011
Positive Displacement Pumps Basic
Hi
Let us refresh your knowledge about positive displacement pump.
Business Development Manager
Let us refresh your knowledge about positive displacement pump.
if you have any question please do not hasitate to write to us.
Thanks for your time and attention
Bhalchandra padwal
Business Development Manager
091 9967787080
MM 59 4/4 B/H Siddivinayak Stores, Khadev Nagar
Chembur Govindi Road, Chembur, Mumbai - 400071 INDIA
Skype ID : optimizesolution ( Add us to your IM and let us understand each other )
Monday, October 24, 2011
Optimize Solution Services
Hi
We have briefly incorporated our service for your reference. We recommend you to spend only 3 mintues of your presious time.
Please write to us if you any problem in view or any question regarding our service. Please visit www.optimizesolution.com
We have briefly incorporated our service for your reference. We recommend you to spend only 3 mintues of your presious time.
Please write to us if you any problem in view or any question regarding our service. Please visit www.optimizesolution.com
Friday, September 16, 2011
PUMP & SYSTEM IMPROVEMENT SYSTEM
Hi
Please check the vidoe and if you have any question do not hasiste to ask?
We promise only those thing which we can do with superior authority.
Please visit www.optimizesolution.vze.com
Regards
Bhalchandra Padwal
Please check the vidoe and if you have any question do not hasiste to ask?
We promise only those thing which we can do with superior authority.
Please visit www.optimizesolution.vze.com
Regards
Bhalchandra Padwal
Friday, July 8, 2011
Need Pump Help! Need Pump Consultant
Hi
Sometime it becomes really difficult, to say or to predict or understand, which pumps should you use for an application which is giving you problem from time to time.
Well the answer is simple? Contact a Pump Consultant. Question arise in your mind (FAQ)
So if you need pumpset why not pay 10 to 15% more premium to a pump consultant and let him buy or supply pumpset for you and avoid the trouble of trial and error altogether.
You can invest in pump consultant as you invest on a stand by pump equipment. Mind you pump consultant is good only when he has knowledge about all type of pump available, making selection, justifing initial high cost of purchase, lowering operational cost of pumpset, recommend you correct thing from time to time and etc..... as there are may things.
Finding a right pump consultant is difficult job?
if you have question please do not hesitate to ask?
Taking your leave
regards
bhalchandra padwal
+91-9967787080
www.optimizesolution.vze.com
Sometime it becomes really difficult, to say or to predict or understand, which pumps should you use for an application which is giving you problem from time to time.
Well the answer is simple? Contact a Pump Consultant. Question arise in your mind (FAQ)
- Can i justify the expenses i have done to hire Pump Consultant?
- Why should we hire a Pump Consultant?
- What do Pump Consultant know? that we don't?
- What is he is going to do?
- Why should we pay him for those services?
- Dose these will help in Saving or Its Additional cost to the Company?
- Yes you can justify those expenses to Management? Pump Consultant will prepare Service provided expenses for improvement in plant
- You should hire Pump Consultant because a Maintenance Manager knows only mechanical aspect of Pump which are not good enough for operation of pump. And there are thousand type of other equipment coming under his work. You cannot expect him to be master in all equipment. But if he has one pump specialist at his disposal, the situation is different.
- A Pump Consultant has knowledge of working of all type of Pump and he exactly know which pump will work better for particular application. He know how to select pipline, loss involve in throtling and by-pass, inproper pipeline, calculation of suction and discharge pressure, avoiding oversize and under sizing of pump, basic maintenance of pump for longer life, change in pipline if required, trying to bring down maintenance cost, lower operation cost, reduce downtime cost to zero.
- He is going to help you in troubleshooting or problem with pumpset. He is going to be there when you really need help on pump. He is going to study you plant for pumps, take population of pump, recommend you improvement in pumping system, advice type of pump to be used. making life cycle cost analysis to pumpset,
- When you save million of dollar every year, you have to spend for those service. His service are specialize and boost you plant productivity, bring down operational cost, help you technical person to take your plant operation to next higher level. Reducing labor cost, increase safety of your plant and most importantly trying to bring down you downtime to zero. He can justify investment in initial cost of pumpset against by inferior quality of pump-set
- He can save thousand to million of Dollar / Euro / Rupees in just your Operational cost by using life cycle cost of pumpset. He is trying to bring downtime loss to zero. He is trying to bring down energy loss in pipeline to the lowest possible unit. He is helping your maintenance manager on maintenance and to save on maintenance cost. He is helping you in sourcing, sizing and selection of pumpset, rather then having trial and error method due to lack of knowledge of pump.
So if you need pumpset why not pay 10 to 15% more premium to a pump consultant and let him buy or supply pumpset for you and avoid the trouble of trial and error altogether.
You can invest in pump consultant as you invest on a stand by pump equipment. Mind you pump consultant is good only when he has knowledge about all type of pump available, making selection, justifing initial high cost of purchase, lowering operational cost of pumpset, recommend you correct thing from time to time and etc..... as there are may things.
Finding a right pump consultant is difficult job?
if you have question please do not hesitate to ask?
Taking your leave
regards
bhalchandra padwal
+91-9967787080
www.optimizesolution.vze.com
Thursday, June 9, 2011
Pumping system efficiency improvement approch?
Cost-effective operation and maintenance of a pumping system require attention to the needs of both individual equipment and the entire system. Often, operators are so focused on the immediate demands of the equipment that they forget to step back and notice how certain system parameters are affecting this equipment. A systems approach analyzes both supply and demand sides of the system and how they interact, shifting the focus from individual components to total system performance.
1. Assessing PumpingSystem Needs
2. Common Pumping System Problems
3. Indications of Oversized Pumps
4. Piping Configurations to Improve Pumping System Efficiency
5. Basic Pump Maintenance
6. Centrifugal Pumps
7. Positive Displacement Pump Applications
8. Multiple Pump Arrangements
9. Pony Pumps
10. Impeller Trimming
11. Controlling Pumps with Adjustable Speed Drives.
if you have any question please feel free ask?
Please visit www.optimizesolution.vze.com for more information.
Bhalchandra Padwal
91-9967787080
Bhalchandra Padwal
91-9967787080
Tuesday, May 17, 2011
Optimize Your Plant and Save Operational Cost
Its an observed fact that during plant operation there is a waste of energy due to following.
Selecting Wrong Type of Pumpset.
- Pump selected are oversize.
- System Pressure is not correct to pump employed.
- Pipeline Loss.
- Trying to push up with old out dated equipment.
- Motor repair and rewinding. trying to save few bucks but endup paying more.
- Using less efficiency equipment due to low initial cost.
- Never considering Life-Cycle-Cost of Equipment.
- Throttling Loss are not understood correctly.
- Application Engineering never consider.
- Pre - Maintenance Activities never carried out.
- Old Plant never undergone upgrading.
We make sure all above activities are carried in your plant by discussion with operators and maintenance manager.
Give us a call and we will study your plant for upgrade (if required) on Fluid Handling System.
Bhalchandra Padwal
Business Development Manager
091 9967787080
MM 59 4/4 B/H Siddivinayak Stores, Khadev NagarChembur Govindi Road, Chembur, Mumbai - 400071 INDIA
Skype ID : optimizesolution ( Add us to your IM and let us understand each other ) MSN ID : optimizesolution@live.com ( Add us to your IM and let us understand each other )
Wednesday, May 11, 2011
Pumpset on an Avarage consume 33% of Total Energy Cost in Industrial Plant
Hi
Pumps are Heart of Industrial Plant. Every Application demand a specific type of pump which gives High performance, Long life and Lower life cycle cost.
Selection of proper type of pumpset play a vital role and requires a specialist, who can select proper type of pump which will take care of following.
- Application Demand
- Energy Efficient
- Reliability
- Performance
- Economy
- Lower Life Cycle Cost
- Specific Needs
Saving operational cost can save million of dollar (no kidding).
Give us a call we will review you plant and we will give you complete report of area which can be improved in your plant, than we can help you to save from thousand to million of dollar every year.
Help on any kind of Pumpset? Come to us if you have problem with Centrifugal Pumpset or Positive Displacement Pump.
If you have anything in your mind please feel free to ask?
for more information please visit www.optimizesolution.vze.com
Bhalchandra Padwal
9967787080
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