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Application 

Typical Pump Type Description

Boiler Feed Service

Small Boiler Feed Systems: T31T41T51 Series

Large Boiler Feed Systems: 100 • 200 Series

One of the traditional applications for regenerative turbine pumps, boiler feed systems, remains one of our largest markets. In a boiler feed system, the pump supplies water to the boiler as the steam is used up in the process. Steam boilers operate under pressure, so the pump must develop enough pressure to overcome the boiler pressure as well as losses due to friction from piping and check valves. Boilers come in all sizes; from small units supplying steam for local drycleaners, to large systems making steam for processing and building heating. MTH can provide feedwater pumps for boilers ranging in size from 10KW to 800HP, and operating pressures up to 1000 psi.

Regenerative turbine pumps are desirable for on/off water supply, as opposed to continuous feed make-up. A centrifugal pump used in conjunction with a regulating valve is the typical arrangement utilized when continuous operation is required.

Booster Service

  Another early use for regenerative turbine pumps is to boost the pressure of water. It may be used to lift or boost from one elevation to a higher one, or to increase the normal system pressure to higher pressure. Some common applications include water pressure boosting for high rise buildings, wash down, and pressure cleaning applications including commercial dish washers, parts washers, and car washes.

Also Note: The stainless steel C Series centrifugals have also been used as low pressure water boosters for small low-rise condominium complexes where the high pressure of a turbine was not necessary.

car & truck washes

   

chemical processing

   

chillers

  Another very popular application for regenerative turbines is in what is commonly called the “Temperature Control Equipment” market. This equipment is used to control the temperature of another primary process or chamber depending on the end application. Generally, the temperature controllers that are used to heat above ambient, are called “heat exchangers”, while those that are used to cool are called “chillers”. In many end applications, controlling temperature within a degree or less is critical. One of the primary methods for temperature control is to heat or cool a fluid like water, DI water, glycol, or synthetic heat transfer fluids like Galden or Flourinert, and then circulate them through coils of tubing wrapped around the product or process chamber. This is normally done with long lengths of tubing that (due to its small diameter) has a high fluid friction resistance, and hence, requires a relatively high head pump. MTH regenerative turbines are ideally suited for these applications not only because of their high head, low flow characteristics, but also because most of the manufacturers of these pieces of equipment pack their enclosures VERY tightly, and the compact single stage design of most of our products are advantageous over much larger multistage centrifugal designs.

In fact, one of the most critical processes in the production of computer integrated circuit chips is the deposition of various conductive materials onto silicon wafers. This process is applied in a sterile, vacuum environment that must be temperature controlled to less than 1 degree variation. MTH T Series and X Series sealless canned pumps are used by several major temperature controller manufacturers to recirculate the temperature controlled fluid to those critical process chambers.

circulating

   

Condensate Return

C41 • C51 • C61 Series

Another related application for MTH regen’s, is condensate return systems. At the end of a steam boiler loop, as the steam gives off its heat, it condenses back to the liquid state. The “condensate” is collected in a receiver tank which contains either a float switch or level control, which starts the pump at a high level and stops it at low level. The condensate is normally pumped to either a de-aerator or a surge tank. Recovery of condensate has value, because it is still hot, and so it requires less energy for the boiler to return it to steam. This provides energy savings. The picture here shows an MTH C41 Series pump on a custom produced stainless steel condensate return tank.

MTH has partnered with a fabrication shop, and can now offer custom made industrial condensate return packages to a customer’s drawing. It should be noted that MTH also produces the suction strainer shown here. It is available in either a standard or offset style. The offset suction strainer is designed specifically to make a T41 or T51 match the suction position of the equivalent Burks pump. Replacement of existing Burks pumps in these applications then becomes a simple matter for the end user. Please contact the factory for more information and pricing on any of these items.

Coolant Systems

 

Many coolant systems are designed to pump cooling fluid through long runs of relatively narrow tubing wrapped around a process chamber or a small tool tip. This situation requires a pump with good high pressure characteristics like the MTH regenerative turbines.

cooling

  Many cooling systems are designed to pump a chilled fluid through long runs of relatively narrow tubing wrapped around a process chamber or through a small tool tip orifice. Higher fluid velocities through the tubing or tool orifice can increase the cooling effect in the critical area, but increased velocity requires higher pressure to offset friction losses. This makes the high pressure characteristic of Regenerative turbines very attractive in these instances. Pulsation free flow is also important in these applications where a pulsating flow typical of a positive displacement pump might adequately cool a tool on the upswing of the pressure pulse, but then heat stress the tool on the downside of the pulsation. The constant flow of the Regenerative Turbine completely eliminates this problem. For applications with tight space constraints like small chiller cabinets, MTH Regenerative Turbines are also very compact in comparison to alternatives like multi-stage centrifugals which grow substantially in length or height as pressure requirements rise. Please refer to our Standard Products page to learn more about our application ranges and compatibilites.

DC (Direct Current) 12Volt Washdown Pumps

DC10 Series

Our DC10 pump which is specifically designed for truck mounted portable toilet washdown duty. Other voltages and HP can be made available on request.

DI Water Handling

  Another electronics industry related application is in circuit board assembly wash down. After electronic components, hard disks, or circuit boards are manufactured, they are washed down with highly purified de-ionized water that has almost zero conductivity. After the wash down, the fluid, which is now contaminated, is collected and transferred to a storage tank. From here it is transferred by another MTH pump at high pressure (150-250 PSI) through a reverse osmosis membrane that removes the contaminated particles, and allows clean fluid to pass through and be reused. Stainless steel construction is required. Other RO (reverse osmosis) applications are also served by MTH X41 Series sealless pumps for shipboard drinking water supplies.

An up and coming alternative to DI water wash down of circuitry and other contamination sensitive computer components, is supercritical carbon dioxide scrubbing. The carbon dioxide is pumped in a very high pressure supercritical gaseous-fluidic state around 1500 PSI or greater system pressure. In this state, the CO2 is an extremely effective and environmentally friendly cleaning solvent that does not harm components. MTH is currently pioneering the research to develop a pump to handle this high technology application.

EDM Machines

  Another chiller application is for EDM or Electron Discharge Machining. These machines remove material from a work piece in a controlled manner by discharging thousands of electrical pulses (like very small lightning strikes). The negatively charged work piece is bombarded by the pulses and unwanted material is vaporized. The continuous discharging “gun” or tool must be cooled at the tip to prevent premature failure. To do this, a narrow water passage is provided around the tip. This cooling application requires low flow, normally 3 - 10 GPM depending upon the machine, and high heads from 125 - 150 psi. The MTH T Series pumps fit this application ideally. Similar cooling systems are also used to cool the tips of plasma arc welders.
As mentioned previously, some manufacturers will buy their “Chillers” prepackaged from any one of a number of companies, but in many cases they may build their own cooling systems and should be approached as potential customers.

Extractors

   

Filter Back Flush

  There are many different types of processes that use filter material to maintain fluid cleanliness. To extend the life of the more expensive filters, a back flushing system is sometimes utilized to force the contaminates out of the filter material long enough for it to be flushed away. One type of system used in the remediation of certain types of groundwater contamination utilizes a chamber that has a number of layers of stacked trays with small holes in the bottom. The water cascades through the trays via the small holes, leaving the contaminants behind. Heavy buildup of contaminants eventually would clog the holes and shut the system down, so an automatic back flush was developed using high pressure MTH regenerative turbine pumps to force the contamination buildup out of the holes at 300 psi, thus cleaning the trays and keeping the system on line. Please go to our standard products page to begin sizing a pump to your particular application.

Fire Suppression

  Automatic fire suppression systems normally utilize two pumps. One unit is the main fire pump which delivers large volumes of water to the fire suppression system (sprinklers) in case of fire. When there is no fire, a low flow, high head “Jockey Pump” is used to overcome the normal system plumbing leakage that bleeds down system pressure over time, and maintains a consistent system pressure. When the system bleeds enough pressure to trigger the jockey pump, it cycles on and re-pressurizes the system back to its normal level. When a large enough pressure drop occurs that the jockey pump cannot overcome it (such as a fire opening a sprinkler head or a fire hose being turned on), the main high volume fire pump starts and takes over the water supply duties. Utilizing the main fire pump for the re-pressurizing function would be very expensive and limit the life of the pump and motor due to the numerous starts & stops. A variety of different MTH turbines are used as fire system jockey pumps depending upon system size.

Fire Systems

Fluid Handling

   

Fluid Transfer

   

Fuel Cells

T31T41T51 Series Fuel cells utilize an electrochemical process to convert the chemical energy in natural gas or pure hydrogen to electricity and heat. The process is non-polluting, low maintenance, and very quiet in operation. Large capacity fuel cells are now available to provide “clean” uninterrupted AC power for such critical installations as hospitals, computers, or for areas subject to frequent power grid fluctuations. These cells can operate in conjunction with, or independent of a commercial power grid, and are mostly used in place of fossil fuel powered generators. In one system, a fuel cell manufacturer uses two MTH T Series pumps. One is a circulation pump which continuously filters the water supply and supplies the feed pump. The feed pump operates at 120 psi and injects de-ionized water into the process to produce the hydrogen necessary for the chemical to electrical energy conversion. The DI water usually requires pumps of all stainless steel construction. As fuel cell technology advances, and becomes viable for automotive applications, a very large new market is evolving and MTH currently provides pumps for a number of prototype fuel cell technologies. Two of our new Engineered Products are poised for this market. The ST21 is a 2,000 ~ 10,000 RPM DC brushless, variable speed sealless canned turbine pump with a flow range up to 2GPM and heads up to 500 feet. This unit is designed specifically for DI water injection for fuel cells, and features a closed-loop pressure transducer feedback system to maintain tight control of system pressure. The sister product is the SC31 which is based on the same motor and controller, but features a centrifugal wet end and capacities up to 6GPM.

Groundwater Remediation

  Another lesser known application is in Groundwater Remediation. One of the many processes in the remediation of certain types of groundwater contamination utilizes a chamber that has a number of layers of stacked trays with grids of small 3/32” holes. The water permeates the small holes in the trays and leaves successively more and more contaminates behind as it cascades down through the remaining trays. The buildup of contaminants would eventually clog the holes completely and shut the system down. To prevent this, a regularly scheduled automatic back flush was developed using MTH pumps to develop the high pressure (300psi) necessary to clean the holes and trays periodically, and keep system efficiency up.

Heat Exchangers

  Another very popular application for regenerative turbines is in what is commonly called the “Temperature Control Equipment” market. This equipment is used to control the temperature of another primary process or chamber depending on the end application. Generally, the temperature controllers that are used to heat above ambient, are called “heat exchangers”, while those that are used to cool are called “chillers”. In many end applications, controlling temperature within a degree or less is critical. One of the primary methods for temperature control is to heat or cool a fluid like water, DI water, glycol, or synthetic heat transfer fluids like Galden or Flourinert, and then circulate them through coils of tubing wrapped around the product or process chamber. This is normally done with long lengths of tubing that (due to its small diameter) has a high fluid friction resistance, and hence, requires a relatively high head pump. MTH regenerative turbines are ideally suited for these applications not only because of their high head, low flow characteristics, but also because most of the manufacturers of these pieces of equipment pack their enclosures VERY tightly, and the compact single stage design of most of our products are advantageous over much larger multistage centrifugal designs.

In fact, one of the most critical processes in the production of computer integrated circuit chips is the deposition of various conductive materials onto silicon wafers. This process is applied in a sterile, vacuum environment that must be temperature controlled to less than 1 degree variation. MTH T Series and X Series sealless canned pumps are used by several major temperature controller manufacturers to recirculate the temperature controlled fluid to those critical process chambers.

Hot Water Pumping

  MTH has developed proprietary inlet and pumping techniques for reducing the NPSH required by its pumps to handle hot fluids near their boiling point with minimal cavitation. When pumping water at or near 212 degrees F it becomes more and more difficult to draw the fluid into the pump inlet without vaporizing it and causing vapor lock. Even if there is some cavitation in the pump, Regenerative Turbines are well known for having some of the best resistance to cavitation erosion and can often handle vapor in excess of 20% for certain periods of time. Most of our products will handle 4 foot NPSHA, but our 250/260/270 Series can handle down to 2 feet, with some of our 240/280 Series capable down to 1 foot. Please see our Standard Products for more info.

Hydrostatic Testing

  MTH Pumps are often used for Hydrostatic Testing. They will build and hold pressure at a specified test point for a certain time period while the subject equipment is checked for leakage. Examples include hydrostatic pressure testing of tanks, pumps, and various high pressure system components and piping.

Jockey Service

  Automatic fire pump systems normally utilize two pumps. One is the main fire pump which delivers large volumes of water to the fire standpipe system in case of fire. The other is a low flow, high head jockey pump which keeps the system pressurized during normal non-fire conditions.

Laboratory Equipment

   

Laser Cooling

  Many coolant systems are designed to pump cooling fluid through long runs of relatively narrow tubing wrapped around a process chamber or a small tool tip. This situation requires a pump with good high pressure characteristics like the MTH regenerative turbines.

Low NPSH

  MTH has developed proprietary inlet and pumping techniques for reducing the NPSH required by its pumps to handle fluids near their vapor pressure (near boiling point). Whether you are trying to pump water at or near 212 degrees F or fluids like ammonia or Freon that are often stored at their saturation point, MTH pumps are capable of handling applications as low as 1 foot NPSHA with some of our Standard Products. In some cases, we may be able to extend that below 1 foot with a custom design. Even if there is some cavitation in the pump, Regenerative Turbines are well known for having some of the best resistance to cavitation erosion and can often handle vapor in excess of 20% for certain periods of time. Most of our products will handle 4 foot NPSHA, but our 250/260/270 Series can handle down to 2 feet, with some of our 240/280 Series capable down to 1 foot. Please see Standard Products for more info. Please inquire with the factory about custom modifications to T Series and X Series products for very low NPSH availability under 4 feet.

Machine tool high pressure coolant

T51 or M Series MTH pumps can be used to boost the standard cutting fluid pressure of a machine tool to significantly higher ones (up to 1,000 psi). By removing heat from the cutting tip and clearing chips, high pressure coolant allows a much higher cutting rate (sfm), increasing productivity and reducing costs. Examples include gun drilling, boring, core drilling, high speed drilling, and the like

Magnetic Drive

  Although MTH does not currently offer a magnetic drive solution, we have a very broad offering of canned motor pumps that are much more compact than mag drive options and do not suffer from the temperature limitations and decoupling problems often associated with mag drive solutions. Please see our X Series as well as canned versions of our other T and M Series pumps under the Custom Engineered Products section or contact the factory for a recommendation.

Medical Imaging

  Another very popular application for regenerative turbines is in what is commonly called the “Temperature Control Equipment” market. This equipment is used to control the temperature of another primary process or chamber depending on the end application. Generally, the temperature controllers that are used to heat above ambient, are called “heat exchangers”, while those that are used to cool are called “chillers”. In many end applications, controlling temperature within a degree or less is critical. One of the primary methods for temperature control is to heat or cool a fluid like water, DI water, glycol, or synthetic heat transfer fluids like Galden or Flourinert, and then circulate them through coils of tubing wrapped around the product or process chamber. This is normally done with long lengths of tubing that (due to its small diameter) has a high fluid friction resistance, and hence, requires a relatively high head pump. MTH regenerative turbines are ideally suited for these applications not only because of their high head, low flow characteristics, but also because most of the manufacturers of these pieces of equipment pack their enclosures VERY tightly, and the compact single stage design of most of our products are advantageous over much larger multistage centrifugal designs.

In fact, one of the most critical processes in the production of computer integrated circuit chips is the deposition of various conductive materials onto silicon wafers. This process is applied in a sterile, vacuum environment that must be temperature controlled to less than 1 degree variation. MTH T Series and X Series sealless canned pumps are used by several major temperature controller manufacturers to recirculate the temperature controlled fluid to those critical process chambers.

Metering

  The low flow, high pressure characteristics of Regenerative Turbines make them excellent for metering or process injection into a larger pressurized pipeline where flow rates required are in the range of 1GPM to 150GPM and pressures up to 1000psi. Please see our Standard Products page for more information.

Misting

  The low flow, high pressure characteristics of Regenerative Turbines make them excellent for misting applications where flow rates required are in the range of 1GPM to 150GPM and pressures up to 1000psi. Please see our Standard Products page for more information.

Mixing

  The numerous small vanes and helical flow paths developed inside Regenerative Turbines make them excellent for mixing smaller non-homogeneous flows, while their low flow, high pressure characteristic is excellent for process injection into a larger pressurized pipelines. For those wishing to mix gasses into a fluid flow for dissolution or to create micro-bubbles for DAF applications, regenerative turbines are an excellent choice. Some of our products can even be fitted with custom gas or fluid injection ports to make the process even simpler. Please see our Standard Products page to size a pump for your application. If a custom injection port is interesting to you, Please contact the factory for a recommendation.

Pressure Injection

  Pressure Injection is another general application where the high pressure characteristic of the regenerative turbine pump is ideal. One application uses a turbine to directly inject creosote at 150 psi into wood poles and bridge planks to preserve the wood and prevent insects from eating the wood. Another direct injection application is the infusion of curing agents into concrete. High pressure is necessary to drive the chemicals through spray nozzles and into the concrete mixing chamber, while the low flow characteristic of the regen’ turbine provides the necessary metering control. These agents control the curing time of the concrete and must be varied depending upon the travel time to the job, as well as environmental conditions.

In a different type of pressure injection, chlorine is added to a water treatment system by use of an ejector. In this application, a relatively small amount of water (generally, less than 30 GPM) is diverted from the main stream to our pump, which boosts the pressure and drives the water through an orifice. The high velocity at the ejector orifice creates a vacuum, which then pulls chlorine into the system from a reservoir, and mixes it into the main flow line. This method of ejector chlorination is required because chlorine is too aggressive to pump directly. There are many other chemicals that require this method of injection, and regenerative turbines are well suited to this where the primary ejector capacity requirement is less than 150GPM. In another wastewater treatment application, turbines are remotely activated to pump low volume water samples from the process line or tank, through a long length of tubing, and back to a laboratory environment for analysis of system performance. The high tubing friction resistance and low volume requirement makes a small regenerative turbine perfect for the job.

Process

   

Refrigeration

  Refrigeration is a growing application for several MTH products. MTH’s ability to handle low vapor pressure refrigerants is a derivation of our extensive experience in the boiler feed and condensate return market. High temperature water near its boiling point can have a vapor pressure equal or less than that of an ammonia refrigeration system. The sealless canned HRC Series centrifugal units are commonly used for low differential pressure refrigerant recirculation. Sealless canned multistage turbine SL52 turbine pumps are used in ammonia refrigeration systems as an “ammonia transfer pump”. This eliminates the need for expensive tanks, piping, compressors, and valving commonly used to increase the pressure of ammonia in an “equalized pressure system”. The important feature of our turbines in this application is that ammonia has very poor lubricating properties and the York IT and the Viking positive displacement pumps that have been used in the past for this application have metal to metal contact that translates into very high wear rates. MTH turbines have little to no metal to metal contact due to their floating impeller design, and therefore have much superior service life in an environmentally friendly, sealless design, suitable for meeting EPA and OSHA requirements. Our sealless turbines feature a reverse circulation line which constantly vents ammonia vapor buildup from the pump and motor during, and in between operating cycles. The low NPSH requirement of both the HRC Series and the SL50 Series make both of these units ideal for pumping low vapor pressure fluids like ammonia, where low NPSH margin can cause destructive cavitation. Both of these units offer totally leak free operation necessary for governmental safety and environmental requirements. The sealless canned ST31’s, ST41’s, ST51’s, and X Series turbines are also capable of safely handling ammonia and other toxic refrigerants in smaller point of service refrigeration systems. Even for simple water/glycol systems for refrigerated cases, MTH high pressure regenerative turbines in either mechanical seal or sealless versions are perfect for overcoming the friction resistance of long heat exchanger piping runs.

Reverse Osmosis

  The low flow, high pressure characteristics of Regenerative Turbines make them excellent for Reverse Osmosis applications where flow rates required are in the range of 1GPM to 40GPM for pressures up to 1000psi (See M Series under Standard Products), or for up to 150GPM at lesser pressure ranges, See the 150/160/170 Series under Standard Products for more information.

Seal Flushing

  MTH Pumps are used as Seal Water Pumps on larger pumping units. Clean, cool water is pumped into the seal chambers of larger process pumps at pressures exceeding that of the process. This keeps their seals cool and free of contamination from the process fluid. The flushing extends the life of large process pumps and their expensive large diameter seals. This system also helps prevent contaminated process fluid from escaping the seal chamber in the event of a minor seal leak by providing a clean fluid barrier.

Spraying

  The low flow, high pressure characteristics of Regenerative Turbines make them excellent for spraying applications where flow rates required are in the range of 1GPM to 150GPM and pressures up to 1000psi. Please see our Standard Products page for more information.

Temperature Control

  Another very popular application for regenerative turbines is in what is commonly called the “Temperature Control Equipment” market. This equipment is used to control the temperature of another primary process or chamber depending on the end application. Generally, the temperature controllers that are used to heat above ambient, are called “heat exchangers”, while those that are used to cool are called “chillers”. In many end applications, controlling temperature within a degree or less is critical. One of the primary methods for temperature control is to heat or cool a fluid like water, DI water, glycol, or synthetic heat transfer fluids like Galden or Flourinert, and then circulate them through coils of tubing wrapped around the product or process chamber. This is normally done with long lengths of tubing that (due to its small diameter) has a high fluid friction resistance, and hence, requires a relatively high head pump. MTH regenerative turbines are ideally suited for these applications not only because of their high head, low flow characteristics, but also because most of the manufacturers of these pieces of equipment pack their enclosures VERY tightly, and the compact single stage design of most of our products are advantageous over much larger multistage centrifugal designs.

In fact, one of the most critical processes in the production of computer integrated circuit chips is the deposition of various conductive materials onto silicon wafers. This process is applied in a sterile, vacuum environment that must be temperature controlled to less than 1 degree variation. MTH T Series and X Series sealless canned pumps are used by several major temperature controller manufacturers to recirculate the temperature controlled fluid to those critical process chambers.

Variable Frequency

X Series
ST21
SC31

Most MTH pump products are available with an optional variable frequency controller and a pressure transducer in a completely assembled and tested unit. A closed loop pressure transducer / variable frequency drive combination can eliminate the need for costly pressure relief valves and their associated plumbing problems, while gaining the ability to maintain constant discharge pressure by automatically varying pump motor speed. Signal inputs and outputs are available on the drive for accommodating a variety of external controls, alarm set point signals, and other programmed outputs.

Wash Down Service

  There are many types of wash down applications. Generally, most wash down services utilize high pressure sprays to clean parts and work surfaces. Because of their pumping characteristics, regenerative turbines are especially suited to those applications where these high pressure, low flow sprays are used.

Wastewater Service

  Due to our capability to handle 20%+ entrained vapor, the regenerative turbines can be used in Dissolved Air Floatation or “DAF” applications. Air is injected or drawn into the pump inlet along with the process fluid (usually water). The turbine impeller is extremely adept at breaking the air up into very small bubbles that when viewed in a tank, appear like “smoke” in the water. This air/water mixture is pumped into the bottom of a wastewater tank. The bubbles have a natural affinity for recombining into larger bubbles and any solid materials in proximity will act as a catalyst for this to occur. As a result, all of the solid waste materials in proximity to the bubble mixture will attract the air bubbles and naturally float to the surface where they can be skimmed off and disposed of. DAF is used in a number of applications including poultry, fish, and other food processing, as well as municipal wastewater treatment systems.

Water Pumping

  The low flow, high pressure characteristics of Regenerative Turbines make them excellent for any water pumping application where flow rates required are in the range of 1GPM to 150GPM and pressures up to 1000psi. Please see our Standard Products page to see more specifics on our application ranges.
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