national triplex mud pump free sample

NOV 12-P-160 Mud Pump is rated at 1600 input horsepower (1193 kw) at 120 strokes per minute, with a 12-inch (304.8 mm) stroke. Multiple liner sizes allow pressures and volumes to handle circulation requirements in deep drilling applications.

Flexibility: Compact engineering provides higher efficiency in less space. The NOV 12-P-160 Triplex Mud Pump light weight and flexible design make it easily adaptable to a variety of rig configurations. This provides flexibility as drilling requirements and conditions change.

Fluid End Modules: NOV offers a choice of fluid end modules and valve covers for every P Series pump model to select the fluid end module that exactly matches drilling requirements. All pump models can be equipped with either the standard or premium forged, two-piece interchangeable fluid modules

Choose a used Emsco FB-1600 Triplex Mud Pump from our inventory selection and save yourself some money on your next shallow drilling oilfield project. This Emsco FB-1600 Triplex Mud Pump is used and may show some minor wear.

We offer wholesale pricing on new Emsco FB-1600 Triplex Mud Pump and pass the savings on to you. Contact us to compare prices of different brands of Mud Pump. This equipment is brand new and has never been used.

Our large network often has surplus Emsco FB-1600 Triplex Mud Pump that go unused from a surplus purchase or a project that was not completed. Contact us to see what Emsco FB-1600 Triplex Mud Pump we have in inventory. The surplus Emsco FB-1600 Triplex Mud Pump are considered new but may have some weathering depending on where it was stored. Surplus oilfield equipment is usually stored at a yard or warehouse.

We have refurbished Mud Pumpthat have been used and brought up to functional standards. It is considered a ready to use, working Mud Pump. Please contact us for more information about our refurbished Emsco FB-1600 Triplex Mud Pump. These Mud Pump have been used and brought up to functional standards. It is considered a working Mud Pump. Please contact us for more information about the product.

Our triplex and quintuplex pumps, cementing and fracturing equipments are interchangeable to global famous brands: Weir spm, Serva, BJ, Gardner Denver, Halliburton, Oilwell, OPI and so on. We also make a full line of Module assy and fluid end expendables for popular mud pumps in the world, including continental Emsco, National, Gardner Denver, Oilwell, Ideco, Wheatly, Wilson,with, opi, Ellis Williams, etc.

A wide variety of national 12 p 160 triplex mud pump options are available to you, You can also choose from new, national 12 p 160 triplex mud pump,As well as from energy & mining, farms, and food & beverage factory. And whether national 12 p 160 triplex mud pump is provided, {2}, or {3}.

Rig pump output, normally in volume per stroke, of mud pumps on the rig is  one of important figures that we really need to know because we will use pump out put figures to calculate many parameters such as bottom up strokes,  wash out depth, tracking drilling fluid, etc. In this post, you will learn how to calculate pump out put for triplex pump and duplex pump in bothOilfield and Metric Unit.

Uralsk region, Kazakhstan - May 24 2012: Oil deposit Zhaikmunai. In desert. Mud pump for drilling rig with pipes and equipment. Blue sky with clouds.1664080228

Oil and Gas Equipment. Mud Pump. Triplex. Dampener. Oil pump. Drilling Fluid. Electric Motor. Safety Valve. Pressure relief. cylinder. piston. 3D render. High Resolution with Alpha channel.1937122150

WHATAROA, NEW ZEALAND, DECEMBER 5, 2014: An unidentified driller on the Deep Fault Drilling Project cleans a mud pump during a break while drilling to 1300 metres near Whataroa, New Zealand246536242

Uralsk region, Kazakhstan - May 24 2012: Oil deposit Zhaikmunai. Panorama of equipment of drilling rig. Mud pumps and pipes. Engineer in orange work wear and white helmet.1663501768

Uralsk region, Kazakhstan - May 24 2012: Oil deposit Zhaikmunai. Drilling rig mud pump control panel. Gauges and indicators. Serviceman maintenance worker on background.1663186276

Uralsk region, Kazakhstan - May 24 2012: Oil deposit Zhaikmunai. Drilling rig mud pump control panel. Close-up. Yellow tractor on background blurred.1663186282

Oil and Gas Equipment. Mud Pump. Triplex. Dampener. Oil pump. Drilling Fluid. Electric Motor. Safety Valve. Pressure relief. cylinder. piston. 3D render. High Resolution with Alpha channel.1937122147

Uralsk region, Kazakhstan - May 24 2012: Oil deposit Zhaikmunai. Mud pump for drilling rig, pipes and equipment. Oil rig on blue sky with clouds background.1664080246

Uralsk region, Kazakhstan - May 24 2012: Oil deposit Zhaikmunai in desert. Mud pump for drilling rig, pipes and equipment. Blue sky with light clouds1663501756

Uralsk region, Kazakhstan - May 24 2012: Oil deposit Zhaikmunai. Mud pump for drilling rig. Asian maintenance worker or engineer in blue work wear and white hardhat supervising.1664080225

Uralsk region, Kazakhstan - May 24 2012: Rusted mud pumping machine pipes left. Oil drill rig (derrick) right.Oil deposit Zhaikmunai, Kazakhstan.1592267044

Uralsk region, Kazakhstan - May 24 2012: Oil deposit Zhaikmunai. Oil drilling rig. Serviceman fixing broken mud pump engine. Baker Hughes equipment.1663186153

WHATAROA, NEW ZEALAND, DECEMBER 5, 2014: An unidentified driller on the Deep Fault Drilling Project cleans a mud pump during a break while drilling to 1300 metres near Whataroa, New Zealand246536227

View of various lines of pipes includes bulk mud, mud discharge, drilling water, base oil and brine on board offshore drilling rigs in various color coded.583552141

Mud pumps are the pumps deployed in the oil and gas industry, mainly to circulate drilling fluids and other kinds of fluids in and out of the drilled wells for exploration. The mud pumps transfer the fluids at a very high pressure inside the well using the piston arrangement. The number of pistons decides the displacement and efficiency of working of the mud pumps, originally only dual piston pumps and three-piston pumps were used, but the technological advancements have seen pumps with five and six pistons to come up. Currently the triplex pumps which have three pistons are used, but the duplex pumps having two pumps are still deployed in the developing countries.

Based on its types, global mud pump market can be segmented into duplex, triplex, and others. The triplex mud pumps will dominate the mud pump marking in the given forecast period owing to its advantages and ongoing replacement of duplex pumps with triplex pumps. Based on operation, the global mud pumps market can be segmented into electric and fuel engine.

The electric mud pumps will dominate the market during the given forecast period due to the advantage of eliminating the harmful carbon emission which is done in the case of fuel engine pumps. Based on its application, the global mud pumps market can be segmented into oil & gas, mining, construction, and others.

The major market driver for the global mud pumps market is the increasing exploration activities taking place in various regions of the world to satisfy the increased energy demand. The number of drilled wells has increased in recent years, which has certainly impacted the growth of the mud pumps market in both oil & gas and mining sectors.

Key market restraint for the global mud pumps market is the drift towards the cleaner sources of energy to reduce the carbon emissions, which will certainly decrease the demand for oil & gas and therefore will have a negative impact on the growth of the global mud pumps market.

Some of the notable companies in the global mud pump market are Mud King Products, Inc. Gardner Denver Pumps, Weatherford, Schlumberger, National Oilwell Varco, China National Petroleum Corporation, Flowserve Corporation, MHWirth, American Block, Herrenknecht Vertical Gmbh, Bentec GmbH Drilling & Oilfield Systems, Drillmec Inc, Sun Machinery Company, Shale Pumps, and Dhiraj Rigs.

The global mud pump market has been segmented into North America, Europe, Asia Pacific, Latin America, and Middle East & Africa. Owing to the well-established production sector and stable exploration industry North America holds the largest market for the mud pumps. The onshore exploration activities of oil & gas have increased at a good rate in the North America region, which has certainly boosted the growth of the mud pumps market in the region.

The demand from Europe and Asia Pacific has also increased due to exploration activities in both the regions owing to the increased energy demand. The energy demand specifically in the Asia Pacific has increased due to the increased population and urbanization. The Middle East and Africa also hold significant opportunities for the mud pumps market with increased exploration activities in the given forecast period.

In August 2018, Henderson which is a leading company in sales and service of drilling rigs, and capital drilling equipment in Texas signed a contract with Energy Drilling Company for the purchase and upgrade of oil field equipment’s which included three 1600hp × 7500psi mud pumps. This will be the first refurbishment completed at Henderson’s new service center and rig yard.

In January 2018, Koltek Energy Services launched the 99-acre facility for the testing of the oil field equipment in Oklahoma. This will allow the oil field equipment manufacturers to test their equipment at any given time. The company has deployed the MZ-9 pump which has a power rating of 1000Hp.

Pune, Maharashtra, January 16, 2020 (Wired Release) Prudour Pvt. Ltd. The Global Mud Pumps Market Research Report is expected to display a high CAGR according to the recent report added by MarketResearch.Biz. Distinct growth driving forces and upcoming trends which will boost the market growth are included in this study. The supply/demand statistics and the presence of Mud Pumps market across various geographies are analyzed deeply. Further, a complete forecast framework with development aspects and restraints are portrayed from 2020-2029. Mud Pumps market potential, beneficial government plans, and policies, growth in purchasing power due to extra disposable income and distinct other beneficial factors are stated. A complete outlook of Mud Pumps market revenue share, product development and innovation, advanced technologies, and new coming market segments are studied.

The latest report added by MarketResearch.Biz reveals that the worldwide Mud Pumps market will showcase a steady CAGR in the forthcoming years. The research report comprises with an extensive analysis of market drivers, constraints, threats, risks, and opportunities. It addresses the profitable investment options for the key players in the forecast years. Analysts have provided market projections at a worldwide and regional level. The research report is a thorough analysis of the distinct factors affecting the trajectory of the Mud Pumps market globally.

To assimilate the complete report through TOC, Figures, and Tables, get free sample copy from this official link: https://marketresearch.biz/report/mud-pumps-market/request-sample

The report describes the drivers making the future of the Mud Pumps market. It calculates the various forces that are projected to create a positive influence on the complete market. Analysts have analyzed the investments in research and growth of products and technologies that are estimated to give the new emerging players a definite growth. Moreover, researchers have also contained a study of the changing consumer behavior that is estimated to affect the demand/supply cycles present in the worldwide Mud Pumps market. Progressing per capita earnings, enhancing economic situations, and current and upcoming trends have all been analyzed in this research report.

National Oilwell Varco, Schlumberger Limited, Gardner Denver Inc, Weatherford International plc., Flowserve Corporation, Weir Group, Sulzer, Ebara Corporation, Tsurumi Pump, Xylem Inc

Segmentation by Type: Duplex, Triplex, Quintuplex. Segmentation by Mode of Operation: Electric, Fuel Engine. Segmentation by Application: Onshore, Offshore

In the succeeding chapters, analysts have mentioned the regional segments present in the worldwide Mud Pumps market. This offers the readers a straiten-view of the market globally enabling a deep view at the elements that could explain its progress. It focuses attention on myriad regional aspects such as the effect of culture, environment, and government policies that impact the regional markets.

The Mud Pumps market research report at first initiate with the definitions, classifications, applications and market outlook, manufacturing processes, product specifications, cost structures, raw materials and so on. Then it studied the global main region market conditions, comprising the product price, capacity, production, profit, supply, demand and growth rate of the market and forecast estimation. In the end, the report gives a new project SWOT analysis, investment return analysis, and investment feasibility analysis.

The latest news stories display how the Mud Pumps market report introduces a complete picture of product specification, product type, innovation, and production study considering key factors, such as revenue, cost, price, gross, and gross margin. It majorly concentrates on Mud Pumps market competition, segmentation, leading vendors, and industry situations. The competitive scenario mapping the latest trends and outlook of the report which spotlight a transparent insight about the market share study of major leading industry players. Our Mud Pumps market analysts use the recent primary and secondary research tools and techniques to compose complete and in-depth market research reports. In addition, technological advancements, Mud Pumps market regulatory structure, concerned sectors, and tactical path are also included in the report.

The report by MarketResearch.Biz goal to reflect the actual market size, trends, value by conducting a genuine and precise study of this industry. The Mud Pumps market value, volume, important regions or countries and past scenarios are also offered. An absolute competitive Mud Pumps market scenario, product lifecycle analysis, manufacturers strength map, threats, challenges, and PESTLE analysis is carried out.

Adjust or replace these bearings at first sign of wear. The bearings in the crank end are babbitt lined steel shells, adjustable for wear by removing shims and easily replaced when completely worn. These bearings should be watched closely and adjusted at first signs of looseness.. You will note on series 3400, 3800, 3500, and 3900 pumps, that the shims do not completely fill the outer gap between rod and cap casting, although the connecting rod bolts are tight. This is because the faces of the shell bearings project slightly beyond the faces of the rod and cap castings, and the shims are gripped only between the faces of the bearing halves. Do not try to close this outer gap by tightening the connecting rod bolt as it will put an excessive strain on the bolts.

To check for wear, place a wrench on the top connecting rod bolt and shake the rod parallel to the crankshaft. (The pressure must be relieved from the liquid end of the pump, so that the pump"s mechanism is free to move.) If the rod bearing moves without resistance, the bearing may be too loose and need adjusting. If the bearing does need adjusting, remove shims until you cannot shake the rod, then add .005" shims one at a time until there is little side movement. Be sure to torque rod bolt nuts to proper value for each adjustment. Oil clearance should be checked with Plastigage (available in most parts stores). Wipe crankshaft journal clean of any oil, place a strip of Plastigage on the crankshaft journal and tighten rod cap to the proper torque value. Once tightened, remove rod cap and measure oil clearance with scale on Plastigage package. See oil clearance chart. (NOTE: If you are making this adjustment after having had the crossheads out, be sure that the oil holes in the rod are pointing up. The "up" side is indicated by matching numbers stamped on the cap and rod at the split between them. These numbers should be the same on each rod and should be on the top side of the crankshaft.) Rotate the shaft by hand and if there is any hard drag or tight spots in the bearing, add another 0.005" shim. After this bearing is properly adjusted, loosen bolts a few turns and repeat the above operation on the other bearings. After all bearings have been adjusted.

Torque all connecting rod bolt nuts back to proper value. Again rotate the pump by hand to check for excessive drag and tight spots. If none, the pump should be ready for operation.

If the pump cannot be rotated by hand due to the drive being enclosed, care must-be taken: not to over-tighten the bearings, since they cannot be checked by rotating the pump. When bearings are adjusted by this method, watch carefully for overheating when the pump is put into operation.

It is usually better to have a bearing a little too loose than too tight. A slightly loose bearing will cause very little trouble because of the slow operating speeds of the pump, but a tight bearing will overheat and the babbitt may melt or pull. Normal precautions must be taken to insure cleanliness of parts upon their assembly.

To check for wear, place a wrench on the top connecting rod bolt and shake the rod parallel to the crankshaft. (The pressure must be relieved from the liquid end of the pump so that the pump"s mechanism is free to move.) If the rod bearing moves without resistance, the bearing may be too loose and need adjusting. If the bearing does need adjusting, remove shims until you cannot shake the rod, then add .005" shims one at a time until there is a little side movement. Be sure to torque rod bolt nuts to proper value for each adjustment. (NOTE: If you are making this adjustment after having had the crossheads out, be sure that the oil holes in the rod are pointing up. The "up" side is indicated by matching numbers stamped on the cap and rod at the split between them. These numbers should be the same on each rod and should be on the top side of the crankshaft.) Turn the shaft by hand and if there is any hard drag or tight spots in the bearing, add another .005"" shim. After this bearing is properly adjusted, loosen bolts a few turns and repeat the above operation on the other bearings. After all bearings have been adjusted, torque all connecting rod bolt nuts back to proper amount. Again turn the pump by hand to check for excessive drag and tight spots. If none, the pump should then be ready for operation.

If the pump cannot be rotated by hand due to the drive being enclosed, the bearings may be completely adjusted by shaking the bearing on the shaft as stated above. Care must be taken not to over-tighten the bearings since they cannot be checked by rotating the pump by hand. When bearings are adjusted by this method, they must be watched carefully for overheating when the pump is put into operation.

Alternatively, plastic gauge strips, found in most parts stores may be used to adjust these bearings. It is usually better to have a bearing a little too loose than too tight. A slightly loose bearing will cause very little trouble because of the slow operating speeds of the pump, but a tight bearing will overheat and the babbitt may melt or pull. with experience, an operator can tell by feel when the bearings are properly adjusted. Normal precautions must be taken to insure cleanliness of parts upon their assembly. All wrenches used in adjusting these bearings are standard wrenches.

Mud Pumps Market 2021-2026In the Oil & Gas Industry, Mud Pumps find applications: Onshore Drilling Rigs and Offshore Drilling Rigs. The onshore segment will lead the global mud pumps market and is expected to account for absolute dollar opportunity of US$ 282 Mn by the end of the forecast period.Mud pumps or Drilling mud pumps are a reciprocating piston or plunger pump used in onshore and offshore oil field drilling rigs. Mud pumps are used to circulate the drilling fluid at high pressure (about 7,500 psi) in the down string and carry back the sand and rock produced by drilling bits in the process of crushing. Mud Pumps ensure that the drilling fluid is circulated to the bottom of the well at constant high pressure to clear out the drilling debris. Mud pumps are also referred to as the Heart of a Drilling Rig. Mud pumps are an essential equipment used during drilling and thus, the global market for mud pumps is expected to witness significant growth during the forecast period of 2018-2026 and will reach a market value of US$ 1.08 Bn by 2026.

Request for Free Sample Report of “Mud Pumps” Market @ https://www.persistencemarketresearch.com/samples/24547Key Players:The report has profiled some of the Important players prevalent in the global like – National Oilwell Varco, Gardner Denver, Schlumberger Limited (Cameron International), WeatherFord International plc, Flowserve Corporation, CNPC Baoji Oilfield Machinery Co., Ltd., Honghua Group Ltd., MHWirthTrevi Group (Drillmec), Bentec GmbH Drilling & Oilfield Systems and more.This report covers the sales volume, price, revenue, gross margin, manufacturers, suppliers, distributors, intermediaries, customers, historical growth and future perspectives in the Mud Pumps.Based on Drive Type, mud pumps are categorized into Electric or Fuel Engine Driven mud pumps. Fuel Engine driven mud pumps are more commonly used due to their better suitability for remote locations. The fuel engine segment in the mud pumps market is estimated to witness significant growth rate over the forecast period. The electric segment of mud pumps is estimated to witness decent growth due to various technological advantages, such as reduced mechanical vibrations, increased reliability and increased efficiency.In 2018, North America is estimated to be the most lucrative region in the global Mud Pumps market and is likely to account for more than 54% share in the global absolute $ opportunity in the Mud Pumps market share. Furthermore, growing drilling activities for increasing production of oil & gas in China will create new opportunities in the Mud Pumps market. Europe continues to be a strong market for Mud Pumps and moderate growth is being witnessed in the South East Asia Pacific region. In Middle East & Africa region, oilfield drilling activities will increase due to increasing demand for oil & gas.Based on product type, the mud pumps can be classified into duplex, triplex and quintuplex. Duplex mud pumps are generally double acting pumps and use two pistons to circulate the drilling fluid. Duplex mud pumps are not common nowadays because of the better alternatives available in the market. Triplex mud pumps are the most commonly used option in drilling rigs. In triplex mud pumps, three pistons are used to circulate the drilling fluid. The triplex mud pumps segment will continue to dominate the Mud Pumps market in terms of global market share and is expected to account for more than 74% share of the total absolute dollar opportunity in the mud pumps market by the end of 2026.Complete Report Details@https://www.persistencemarketresearch.com/market-research/mud-pumps-market.aspRegion Coverage (Regional Production, Demand & Forecast by Countries etc.):

Downstream VendorsIf you have any special requirements, please let us know and we will offer you the report as you want.Major Highlights of the Mud Pumps Market Report:The Mud Pumps Market analysis report offers an in-depth study of the potential market growth opportunities and challenges.The report dives deeper into the market and explains the dynamic factors bolstering market growth.The report deeply assesses the current, historical market size, market share, and revenue growth rates to offer accurate market projections for the forecast period.The report analyzes the Mud Pumps Market presence across major regions of the world.It determines the production & consumption capacities and demand & supply dynamics of each regional market.The report further illustrates the intense competition among the key market players and highlights their effective business expansion plans and strategies.It provides company overview and SWOT analysis of each of the market players.Key Questions Answered in This Report.What will the Market growth rate in Future?

If you have any special requirements, please let us know and we will offer you the report as you want and also We Provide you Table of Content.Click Here to Buy this Report@https://www.persistencemarketresearch.com/checkout/24547Media Contact:Persistence Market Research305 Broadway,7th Floor New York City, NY 10007 United StatesCall +1-646-568-7751Call +1 800-961-0353sales@persistencemarketresearch.comAbout PersistenceMarketResearch:PersistenceMarketResearch is an esteemed company with a reputation of serving clients across domains of information technology (IT), healthcare, and chemicals. Our analysts undertake painstaking primary and secondary research to provide a seamless report with a 360 degree perspective. Data is compared against reputed organizations, trustworthy databases, and international surveys for producing impeccable reports backed with graphical and statistical information.

A reciprocating power pump, as depicted in Figure 1, is a displacement machine. It has characteristics that are different than a centrifugal pump. Therefore, the system required for a displacement pump is different than that required for a centrifugal pump, and the operating procedures are also different. For instance, it is common practice to start a centrifugal pump against a closed discharge valve. Starting a displacement pump against a closed discharge valve can damage it. Preferably, a displacement pump should start against negligible discharge pressure. Starting a centrifugal against negligible pressure can damage it.

Therefore, to properly select, apply and operate a power pump requires knowledge of its unique characteristics. Some of these characteristics will be presented by stating common myths, misconceptions or misunderstandings and hopefully dispel some of them in the following list. Since some are not really full-blown myths, just misconceptions or misunderstandings, they will be called “MM.”

Power pumps are self priming.As was learned from operators of pressurized-water nuclear power plants, when a power pump ingests a slug of gas while running, one or more pumping chambers can become “vapor-locked” and cannot expel the gas and regain prime. It is necessary to reduce the pump discharge pressure to near (or below) suction pressure to allow the pump to reprime, and if the pump is running at a high speed with the necessary strong valve springs, priming may be more difficult.

If the first power pump chamber becomes primed, the remaining chambers will automatically become primed.If this were a multistage centrifugal pump, the statement would be true because all impellers are in series. However, in a multiplex power pump, the plungers (pumping chambers) are in parallel, so one chamber can become primed while the other chambers remain “vapor-locked.”

To prime a power pump, it is necessary to disassemble the liquid end.A project engineer once told me that, when starting a new processing plant containing new power pumps, to prime each pump, he would remove each discharge valve cover, remove each discharge valve, fill each pumping chamber with liquid and then reassemble the pump. He was pleased to learn that this laborious process was unnecessary. If the design of the system allows the operator to start the pump against negligible discharge pressure, most power pumps will prime all pumping chambers. Disassembly is not required.

If the pump is driven by a variable speed driver, a bypass line is not required.As discussed above, priming a power pump requires reducing the discharge pressure to near suction pressure, and this is typically accomplished by opening a valve in a bypass line, which connects back to the suction vessel. Such a line is illustrated in Figure 2. A variable speed driver does not eliminate the need for a bypass line.

The motor driver for a power pump needs to have a high starting torque.This misconception arises from the difficulty experienced when starting a power pump against a high discharge pressure. For many reasons, the pump should be started against negligible discharge pressure. The requirement for a high starting torque driver is thus eliminated.

A power pump can be run backward satisfactorily.Although the liquid end will pump the same regardless of the direction of the crankshaft rotation, running a power pump backward can result in a hot power end, power end knocking, reduced lubrication to the crossheads and bearings, and shorter packing life because of the resulting oscillations of the plungers.

Small, high-speed pumps produce lower pulsations than large, low-speed pumps.It has been stated that a smaller pump, running faster, for the same capacity, will produce less pulsation in the suction and discharge piping. That is not true because, as seen in Figure 3, the liquid velocity variation produced by a triplex pump, for example, is typically 25 percent of the average velocity, whether the pump is large or small, running fast or slow. The acceleration of the liquid in the piping, being the rate of change of velocity, is therefore larger for a small, high-speed pump than for a large, low-speed pump when both pumps have the same capacity and the same size piping.

All power pumps require pulsation dampeners.There are installations, with triplex and quintuplex pumps, that operate satisfactorily without pulsation dampeners. These installations are usually characterized by low-speed pumps and short, large-diameter suction and discharge piping.

A discharge pressure below the pump rated pressure indicates a problem with the pump.Unlike with a centrifugal pump, the discharge pressure of a displacement pump is established by the system. If there is low discharge pressure with a power pump, the cause is probably in the discharge system.

Power pumps can handle significant quantities of air or other gases.This one can really be trouble. Even small quantities of free gas flowing into a power pump will shorten the lives of numerous pump components. The higher the discharge pressure, the more damaging is the gas.

The check valves in power pumps are pushed closed by the reverse flow of the pumpage.It is the function of the valve spring to push the valve to near-closed as the plunger reaches the end of its stroke. Higher speeds require stronger springs. If the spring is not strong enough, the valve will be too far from the seat at the end of the stroke and will be slammed onto the seat by the reverse flow of the pumpage. Such action results in a noisy, rough-running pump and shaking pipes.

All power pumps require at least 10 psi of NPSH.Power pumps, when operated near their top rated speeds, require strong valve springs to obtain smooth operation. It is typical for such pumps to require 10 psi, or more, of net positive suction head (NPSH). However, if the pump speed is reduced to a value below about 200 rpm, the springs on vertical suction valves can be removed, and the net positive suction head required (NPSHR) will drop to about 1 psi (less than many centrifugal pumps).

A high suction pressure requires strong suction valve springs.This initially sounds reasonable, but further examination reveals otherwise. A check valve in a power pump is pushed open by the differential pressure of the pumpage. A suction valve is therefore opened by the difference between the suction pressure and the pressure in the pumping chamber. As the plunger pulls back on the suction stroke, the pressure in the chamber falls. When the pressure falls to a value that is just below suction pressure, the suction valve begins to open. The valve knows not the difference between suction pressure and atmospheric pressure. It knows only the difference between suction pressure and chamber pressure. This principle is illustrated by a low-speed pump, pumping propane, which is provided with an inlet pressure of 150 psia. To minimize NPSHR, the springs are removed from the suction valves. Pump operation is quiet and smooth, and the pump achieves high volumetric efficiency. The pump has a high suction pressure and operates satisfactorily with no springs on the suction valves.

Because the top of the pump valve is larger than the “exposed” bottom of the valve, a significant differential pressure is required to open the valve.Figure 4, taken from an article on power pumps, illustrates this theory. The article stated that a high differential pressure was required to kick the valve open. It may be true that a valve with an elastomeric or soft plastic sealing element exhibits such a characteristic, but an all-metal valve does not require a high differential pressure to kick it open. If it did, we could not have pumps that operate satisfactorily with one psi of net positive suction head available (NPSHA).

The allowable lift of a power pump valve is proportional to its diameter.This concept seems to have originated with Reference 1 and was perpetuated by Reference 2. As revealed in Reference 8, the maximum allowable valve lift for smooth pump operation appears to be solely a function of the rpm of the pump crankshaft. It is independent of valve size.

All power pumps are suitable for slurry service.Don’t believe it. Most power pumps are designed to pump only clean (non-abrasive) fluids. Slurry applications require special valves and stuffing box designs. An entire special fluid end may be required.

If the packing on one plunger fails, the packing on the other plungers is near failure.This is often not true. For multiple reasons, one set of packing in a pump can fail prematurely. The other sets of packing may last weeks or months longer. Because of possible improper installation or startup procedure of replacement packing, changing good packing can actually result in a shorter life. Changing all packing, when one set fails, can also mask a problem with one particular stuffing box—such as misalignment or a scored plunger. If it ain’t broke, don’t fix it.

Wright, Elliott F., “New Developments in Reciprocating Power Pumps,” a paper presented to the 6th meeting of the National Conference on Industrial Hydraulics, 1955.

Henshaw, Terry, “Power Pump Valve Dynamics – A Study of the Velocity and Pressure Distribution in Outward-Flow Bevel-Face and Flat-Face Power Pump Valves,” a technical paper presented at the 25th International Pump Users Symposium, Houston, Texas, 2009.

Henshaw, T., “Think power pumps are self-priming? Think again!” Hydrocarbon Processing Magazine, December 2009. 10. Henshaw, Terry, “Improve Power Pump Performance with Stronger Valve Springs”, Compressor Tech Two, July 2010.