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Exhibitor List

Company MTH Tool Company
Country United States of America
Products
Hall E3
Booth E02
Website www.mthpumps.com
Introduction MTH Pumps have been made in an ISO certified company in the USA for over 50 years, specializing in high pressure, low flow regenerative turbine pumps. We are a commercial, industrial, and municipal pump manufacturer serving a wide variety of markets/industries including boiler feed, condensate return, pressure maintenance, water services, petroleum, and chemical process applications. They can produce from 0.34 bar to 70 bar at from a 2 liters 570 liters per minute. They are cast construction in; iron, bronze, and stainless-steel materials with a variety of sealing options and are 100% tested.

Products

MTH Pumps P31 Series Regenerative Turbine Pumps
Capacities to 5 GPM
Heads to 250 Feet
Temperatures to 250°F
Stainless Steel Construction
Compact Size
Top Suction and Discharge
Adjustable Casing for Extended Service Life and Expanded
Performance Envelope
Optional Integral Relief Valve
MTH Pumps T31 Series Regenerative Turbine Pumps
Capacities to 9 GPM
Heads to 300 Feet
Temperatures to 250°F

MTH T31 Series Pumps
The T31 Series close-coupled regenerative turbine pumps represent the most economical, high performance alternative for low flow (1/2 to 9 GPM) applications involving moderate to high pressures (heads to 400 feet). By combining the latest concepts in hydraulic turbine pump design with precision computer controlled manufacturing, the T31 Series pumps deliver high efficiency pumping operation, even at low NPSH. Maintenance costs are kept to a minimum by combining an easily serviceable design with the use of high quality components to provide long life.

T31 Close-upWater Passage Design
MTH masters one of the most critical design considerations of regenerative turbine pumps - the shaping of water passageways to achieve maximum capacity and pressure while minimizing horsepower requirements. By optimizing water passageway cross-sectional profiles for each impeller, MTH improves both efficiency and pressure over the standards realized by other techniques.

Impeller Profile
One of the most notable improvements in regenerative turbine pump technology, incorporated in T31 Series pumps, involves the ability to determine the optimum impeller width and blade length. These factors have a significant effect on the required horsepower versus pressure curve for regenerative turbine pumps. By optimizing these parameters for each pump, peak efficiency is improved and “off peak” horsepower requirements are reduced as well.

Impeller Blades
After the most favorable impeller profile has been determined for a particular water passageway cross-section, MTH calculates the number of blades needed to maximize the performance of that pump. Current blade design in the T31 Series increases both efficiency and design pressure without the manufacturing difficulties associated with producing contoured blade impellers. State-of-the-art computer controlled machines simplify manufacturing of the various MTH impellers utilized in the T31 Series. The result is a high performance pump providing efficiency characteristics exceeding those of much more expensive units.

NPSH Requirements
T31 Series regenerative turbine pumps meet low net positive suction head (NPSH) requirements without efficiency loss. This is achieved by keeping the inlet fluid velocity low and then gently accelerating to passageway velocities. Special ramps are responsible for this gentle fluid entry into the impeller blades and account for the high inlet efficiency of the T31 Series pumps.

Steep Head/Capacity Curve
Pumping capacity varies only slightly as pressure changes. Steep pressure characteristic overcomes temporary line resistances.

Self Adjusting Impeller
T31 impellers utilize balancing holes to promote hydraulic self-centering and to eliminate the need for external adjustment. The impeller exerts no thrust load on the bearings, thereby extending service life. Self-centering is equally effective whether mounted in the horizontal or vertical position.

Extended Reliability Motors
Custom manufactured D3 motors feature a 304 stainless steel shaft and heavy duty ball bearing for extended life. Single phase ODP and 3 phase TEFC enclosures are standard, as well as a two-pole, 50Hz/60Hz ratings, and UL and CE Marks.
E41 • T41 Series Regenerative Turbine Pumps
Capacities to 24 GPM
Heads to 600 Feet
Low NPSH Requirements

MTH E41 • T41 Series
Close-coupled and pedestal mounted regenerative turbine pumps represent the most economical, high performance alternative for low flow (1/2 to 22 GPM) clean fluid applications involving moderate to high pressures (heads to 600 feet).
By combining the latest concepts in hydraulic turbine pump design with precision computer controlled manufacturing, the E41/T41 Series pumps deliver high efficiency operation even at low NPSH. Costs are controlled by efficient manufacturing processes and highly optimized pump designs. Maintenance costs are kept to a minimum by combining an easily serviceable design with the use of high quality components to provide long life.

Water Passage Design
MTH masters one of the most critical design considerations for regenerative turbine pumps -- the shaping of water passageways to achieve highest capacity and pressure while minimizing horsepower requirements. By optimizing water passageway cross-sectional profiles for each impeller, MTH has improved both efficiency and pressure in the E41/T41 Series, exceeding the levels realized by previous techniques.

Impeller Profile
One of the most notable improvements in regenerative turbine pump technology incorporated in E41/T41 Series pumps involves the ability to determine the optimum impeller width and blade length. These factors have a significant effect on the required horsepower versus pressure curve for regenerative turbine pumps. By optimizing these for each E41/T41 Series pump, peak efficiency is improved and “off peak” horsepower requirements are reduced as well.

Impeller Blades
After the most favorable impeller profile has been determined for a particular water passageway cross-section, MTH calculates the number of blades needed to maximize the performance of that pump. Current blade design in E41/T41 Series pumps increases both efficiency and design pressure without the manufacturing difficulties associated with producing contoured blade impellers. State-of-the-art computer controlled machines simplify manufacturing of the various MTH impellers utilized in the E41/T41 Series. The result is a high performance pump providing efficiency characteristics exceeding those of more expensive units.

NPSH Requirements
E41/T41 Series regenerative turbine pumps meet low net positive suction head (NPSH) requirements without efficiency loss. This is achieved by keeping the inlet fluid velocity low and then gently accelerating to passageway velocities. Special ramps are responsible for an almost shockless fluid entry into the impeller blades and account for the high inlet efficiency in the E41/T41 Series pumps.

E41 Series
Similar to the T31 Series, the E41 takes advantage of our custom manufactured dual face D3 motors that incorporate a 304 stainless steel shaft and heavy-duty bearing. The stainless steel shaft eliminates the necessity of a shaft sleeve, thereby reducing the parts count and simplifying maintenance and servicing procedures. All D3 motors also feature a two-pole 50//60Hz rating, as well as CE Mark approval useful for OEM’s with worldwide customers. The three-phase versions of the D3 motors feature a compact TEFC enclosure and a range from 1/3 to 3HP. The single phase D3 motors have an ODP enclosure and a range from 1/3 to 2HP. The E41 is available in horizontal close-coupled and vertical flange mounted configurations only. Please see Design Features for more detailed information on both E41 and T41 motor options.
E51 • T51 Series Regenerative Turbine Pumps
Capacities to 40 GPM
Heads to 700 Feet
Low NPSH Requirements

MTH E51•T51 Series
Close-coupled and pedestal mounted regenerative turbine pumps represent the most economical, high performance alternative for low flow (2 to 40 GPM) clean fluid applications involving moderate to high pressures (heads to 700 feet). By combining the latest concepts in regenerative turbine pump design with precision computer controlled manufacturing, the E51 T51 Series pumps deliver high efficiency operation, even at low NPSH. Costs are controlled by efficient manufacturing processes and highly optimized pump designs. Maintenance costs are kept to a minimum by combining an easily serviceable design with the use of high quality components to provide long life.

Water Passage Design
MTH masters one of the most critical design considerations for regenerative turbine pumps -- the shaping of water passageways to achieve highest capacity and pressure while minimizing horsepower requirements. By optimizing water passageway cross-sectional profiles for each impeller, MTH has improved both efficiency and pressure in the E51 T51 Series, and exceeds the levels realized by previous techniques.

Impeller Profile
One of the most notable improvements in regenerative turbine pump technology incorporated in E51 T51 Series pumps involves the ability to determine the optimum impeller width and blade length. These factors have a significant effect on the required horsepower versus pressure curve for regenerative turbine pumps. By optimizing these for each E51 T51 Series pump, peak efficiency is improved and “off peak” horsepower requirements are reduced as well.

Impeller Blades
After the most favorable impeller profile has been determined for a particular water passageway cross-section, MTH calculates the number of blades needed to maximize the performance of that pump. Current blade design in E51 T51 Series pumps increases both efficiency and design pressure without the manufacturing difficulties associated with producing contoured blade impellers. State-of-the-art computer controlled machines simplify manufacturing of the various MTH impellers utilized in the E51 T51 Series. The result is a high performance pump providing efficiency characteristics exceeding those of more expensive units.

NPSH Requirements
E51 T51 Series regenerative turbine pumps meet low net positive suction head (NPSH) requirements without efficiency loss. This is achieved by keeping the inlet fluid velocity low and then gently accelerating to passageway velocities. Special ramps are responsible for an almost shockless fluid entry into the impeller blades and account for the high inlet efficiency of the E51•T51 Series.

E51 Series
Similar to the T31 Series, the E51 takes advantage of our custom manufactured dual face D3 motors that incorporate a 304 stainless steel shaft and a heavy-duty bearing. The stainless steel shaft eliminates the necessity of a shaft sleeve, thereby reducing the parts count and simplifying maintenance and servicing procedures. All D3 motors feature a two-pole 50/60Hz rating, as well as CE Mark approval useful for OEM’s with worldwide customers. The three-phase versions of the D3 motors feature a compact TEFC enclosure and a power output from 1/3 to 3HP. The single phase D3 motors have an ODP enclosure and a power range from 1/3 to 2HP. The E51 is available in horizontal close-coupled and vertical flange mounted configurations only. For other configurations, see the T51 Series. Please see Design Features for more detailed information on both E51 and T51 motor options.
MTH Pumps M50 • L50 Series Regenerative Turbine Pumps
Capacities to 40 GPM
Heads to 2300 Feet
Single or Multi-stage Units (up to 5)
Horizontal Close Coupled
Horizontal Flexible Coupled
Vertical Close Coupled

MTH M50 • L50 Series
Vertical base mount and horizontal pedestal mounted multi-stage regenerative turbine pumps represent the most economical high performance alternative for low flow (2 to 38 GPM) applications involving moderate to high pressures (heads to 2300 feet).

By combining the latest concepts in hydraulic turbine pump design with precision computer controlled manufacturing, M50 Series pumps deliver high efficiency operation even at low NPSH. Costs are controlled by efficient manufacturing processes, use of standard motors, and highly optimized pump designs. Maintenance costs are kept to a minimum by combining an easily serviceable design with the use of high quality components to provide long life.

Water Passage Design
MTH masters one of the most critical design considerations of regenerative turbine pumps - the shaping of water passageways to achieve maximum capacity and pressure while minimizing horsepower requirements. By optimizing water passageway cross-sectional profiles for each impeller, MTH improves both efficiency and pressure in the M50 Series, and exceeds the standards realized by previous techniques.

Impeller Profile
One of the most notable improvements in regenerative turbine pump technology, incorporated in M50 Series pumps, involves the ability to determine the optimum impeller width and blade length. These factors have a significant effect on the required horsepower versus pressure curve for regenerative turbine pumps. By optimizing these for each pump, peak efficiency is improved and "off peak" horsepower requirements are reduced as well.

Impeller Blades
After the most favorable impeller profile has been determined for a particular water passageway cross-section, MTH calculates the number of blades needed to maximize the performance of that pump. The blade design in M50 Series pumps increases both efficiency and design pressure without incurring the manufacturing difficulties associated with producing contoured blade impellers. State-of-the-art computer controlled machines simplify manufacturing of the various MTH impellers utilized in the M50 Series. The result is a high performance pump providing efficiency characteristics exceeding those of much more expensive units.

NPSH Requirements
M50 • L50 Series regenerative turbine pumps meet low net positive suction head (NPSH) requirements without efficiency loss. This is achieved by keeping the inlet fluid velocity low and then gently accelerating to passageway velocities. Special ramps are responsible for this gentle fluid entry into the impeller blades and account for the high inlet efficiency of the M50 • L50 Series pumps.

Low NPSH Requirements

L50 Series regenerative turbine pumps have exceptionally low NPSH requirements, making them ideally suited for applications where very little inlet head is available.

This reduced NPSHR provided by the L50 Series is obtained by using a first stage centrifugal style impeller with inlet flow paths shaped to maintain a constant fluid velocity. This reduces entry losses to the impeller as well as maintaining efficiency. A multi-vane diffuser is used in conjunction with the centrifugal impeller for balancing radial loads and extracting the maximum pressure from the first stage. Pressure and flow produced by the NPSH inducer assures that the succeeding stages are adequately fed.
MTH Pumps X41 Series "Leak Free" Sealless Pumps
• Extremely Long Service Life
• Leak Free Sealless Design
• Canned Stator Motor
• Capacities to 22 GPM*
• Heads to 350 Feet
• Low NPSH Requirements
• Temperature Range -84°C to 130°C
• Compact Integrated Design
• Stainless Steel Wetted Parts for Excellent Chemical Compatibility
• Standard NPT Threads with optional ISO, BSP, and SAE Available
• Conduit or Electrical Junction Box
• Variable Frequency Drive / Transducer Package Optional (see below)

The X41 Series line of sealless regenerative turbine pumps (also known as canned, hermetic, or zero emission pumps) is designed to handle applications with difficult to seal fluids where absolutely leak free performance is required, and mechanical seals simply cannot provide the needed reliability, protection, and performance. All of this is accomplished at a price point previously unseen in the industry, and is often comparable with other mechanically sealed solutions, but without the leaks and inevitable seal maintenance. Water/glycol mixtures and exotic heat transfer fluids present no difficulty for these units at fluid temperatures from -84°C up to 150°C. The canned motor design is far preferable to magnetic drive couplings as it does not add excessive length to the unit in tight OEM enclosures, or suffer from the magnetic de-coupling problems often associated with mag-drive solutions. Three bearings, high strength cast stainless steel components, and a sealless design assure extended maintenance free life. To demonstrate the potential reliability of these units, well over 800 X41's have been shipped into the field from 1997 thru 2003 into water/glycol chiller applications. Of these 800+ units at end user sites, none have yet been reported to the factory as failed, leaking, or requiring any repair. For other special fluids and applications, optional elastomers, electrical connections, and variable frequency drive control packages are all available to custom fit your particular needs.
140 • 180 Series Pumps
Flexible Coupled
Capacities to 60 GPM
Heads to 800 Feet
Low NPSH Requirements on 240 • 280 Series

140 • 240 • 180 • 280 Series regenerative turbine pumps represent the most economical, high performance alternative for low flow (to 55 GPM) applications involving moderate to high pressures (heads to 700 feet). By combining years of regenerative turbine pump designs with precision computer controlled manufacturing, the 140 • 240 • 180 • 280 Series delivers high efficiency pumping operation, even at low NPSH. High quality parts and an easily serviceable design provide low maintenance and long life.

Water Passage Design
MTH has combined sixty years of water passage design with a multistage mechanical concept to achieve maximum capacity and pressure while minimizing horsepower requirements. By optimizing the number of pumping stages with each water passageway, MTH improves both efficiency and pressure in the 140 • 240 • 180 • 280 Series, exceeding the standards realized by previous techniques.

Impeller Profile
One of the most notable improvements in regenerative turbine pump technology incorporated in 140 • 240 • 180 • 280 Series pumps involves the ability to determine the optimum impeller width and blade length. These factors have a significant effect on the required horsepower versus pressure curve for regenerative turbine pumps. By optimizing these for each 140 • 240 • 180 • 280 Series pump, peak efficiency is improved and “off peak” horsepower requirements are reduced as well.

Impeller Blades
After the most favorable impeller profile has been determined for a particular water passageway cross-section, MTH calculates the number of blades needed to maximize the performance of that pump. Current blade design in 140 • 240 • 180 • 280 Series pumps increases both efficiency and design pressure without the manufacturing difficulties associated with producing contoured blade impellers.

State-of-the-art computer controlled machines simplify manufacturing of the various MTH impellers utilized in the 140 • 240 • 180 • 280 Series. The result is a high performance pump providing efficiency characteristics exceeding those of more expensive units.

NPSH Requirements
140 • 240 • 180 • 280 Series regenerative turbine pumps meet low net positive suction head (NPSH) requirements without efficiency loss. This is achieved by keeping the inlet fluid velocity low and then gently accelerating to passageway velocities.

200 Series Inducer for Low NPSH

240 • 280 Series regenerative turbine pumps provide exceptionally low NPSH requirements to suit boiler feed water deaerator applications.

This reduced NPSH is obtained by using a first stage centrifugal Francis vane impeller with inlet flow paths shaped to maintain a constant fluid velocity. This reduces entry losses to the impeller as well as maintaining pump efficiency. A multi-vane diffuser is used in conjunction with the centrifugal impeller for balancing radial loads and extracting the maximum pressure from the flow produced by the first stage impeller. Pressure and flow produced by the low NPSH inducer assures that the succeeding stages are adequately fed.
150 • 160 • 170 Series Pumps
Flexible Coupled
Capacities to 150 GPM
Heads to 1150 Feet
Low NPSH Requirements on 250 • 260 • 270 Series

MTH 150 • 250 • 160 • 260 • 170 • 270 Series regenerative turbine pumps represent the most economical, high performance alternative for low flow (to 150 GPM) applications involving moderate to high pressures (heads to 1150 feet). By combining years of regenerative turbine pump designs with precision computer controlled manufacturing, the 150 • 250 • 160 • 260 • 170 • 270 Series delivers high efficiency pumping operation, even at low NPSH. High quality parts and an easily serviceable design provide low maintenance and long life.

Water Passage Design
MTH has combined sixty years of water passage design with a multistage mechanical concept to achieve maximum capacity and pressure while minimizing horsepower requirements. By optimizing the number of pumping stages with each water passageway, MTH improves both efficiency and pressure in the 150 • 250 • 160 • 260 • 170 • 270 Series, exceeding the standards realized by previous techniques.

Impeller Profile
One of the most notable improvements in regenerative turbine pump technology incorporated in 150 • 250 • 160 • 260 • 170 • 270 Series pumps involves the ability to determine the optimum impeller width and blade length. These factors have a significant effect on the required horsepower versus pressure curve for regenerative turbine pumps. By optimizing these for each 150 • 250 • 160 • 260 • 170 • 270 Series pump, peak efficiency is improved and “off peak” horsepower requirements are reduced as well.

Impeller Blades
After the most favorable impeller profile has been determined for a particular water passageway cross-section, MTH calculates the number of blades needed to maximize the performance of that pump. Current blade design in 150 • 250 • 160 • 260 • 170 • 270 Series pumps increases both efficiency and design pressure without the manufacturing difficulties associated with producing contoured blade impellers.

State-of-the-art computer controlled machines simplify manufacturing of the various MTH impellers utilized in the 150 • 250 • 160 • 260 • 170 • 270 Series. The result is a high performance pump providing efficiency characteristics exceeding those of more expensive units.

NPSH Requirements
150 • 250 • 160 • 260 • 170 • 270 Series regenerative turbine pumps meet low net positive suction head (NPSH) requirements without efficiency loss. This is achieved by keeping the inlet fluid velocity low and then gently accelerating to passageway velocities.

Low NPSH Requirements
250 • 260 • 270 Series regenerative turbine pumps provide exceptionally low NPSH requirements to suit boiler feed water deaerator applications.

This reduced NPSH is obtained by using a first stage centrifugal Francis vane impeller with inlet flow paths shaped to maintain a constant fluid velocity. This reduces entry losses to the impeller as well as maintaining pump efficiency. A multi-vane diffuser is used in conjunction with the centrifugal impeller for balancing radial loads and extracting the maximum pressure from the flow produced by the first stage impeller. Pressure and flow produced by the low NPSH inducer assures that the succeeding stages are adequately fed.

200 Series Inducer for Low NPSH

The 200 Series inducer style pumps are ideally suited to applications where available NPSH at the pump inlet is limited, such as boiler feed water deaerator service.

A centrifugal Francis vane impeller with low NPSH characteristics is utilized as the pump’s first stage impeller, accounting for the lower inlet head requirement.
This first stage impeller is used in conjunction with a multi-vane diffuser to provide the NPSH required by the second stage regenerative turbine.

Available NPSH as low as two feet can be effectively handled with 250 • 260 • 270 Series pumps, depending on the pump model and capacity.
MTH Pumps C Series Centrifugal Pumps
Capacities to 105 GPM
Heads to 153 Feet
Horizontal Close Coupled

MTH C41 • C51 • C61 Series Pumps
Close-coupled centrifugal pumps from MTH provide economical performance for 5 to 100 GPM applications requiring heads to 140 feet. By combining the latest concepts in pump design with precision manufacturing, the C Series pumps deliver excellent efficiency and low NPSH requirements. Efficient manufacturing processes and highly optimized mechanical designs control costs. Maintenance costs are kept to a minimum by combining a highly serviceable design with quality components to provide a long service life.

Flange Mounted Centrifugal Pumps Option
MTH Stainless Steel Flange Mounted Centrifugal Pumps offer the best materials available to create the longest lasting pumps for your boiler feed needs.

56C Face Adapter Option
Fits a P31, T31, or C Series Pump to any Standard 56 C-face Motor.

Impeller Design
C Series semi-open impellers allow the pump to pass small solids and fibrous material while close running tolerances maintain efficiency and performance. Impellers are pre-trimmed to be non-overloading to the pump and motor size indicated.

NPSH Requirements
C Series centrifugal pumps meet low net positive suction head requirements (NPSHR) without sacrificing efficiency. This is achieved by low fluid inlet velocity and gentle acceleration to peripheral velocities.

Mechanical Seal Box
The large seal chamber provides a wide fluid passage area for maximum cooling of the seal faces and allows debris and gases to be flushed away.

Axial Balance System
The C Series pumps utilize a thrust balancing system which combines the advantages of both static and dynamic balancing techniques to reduce axial thrust and provide longer bearing life.

D3 Motors
Similar to the T31 Series, the C Series takes advantage of our custom manufactured dual face D3 motors that incorporate a 304 stainless steel shaft and heavy-duty bearing. The stainless steel shaft eliminates the necessity of a shaft sleeve, thereby reducing the parts count and simplifying maintenance and servicing procedures. All D3 motors also feature a two-pole 50/60Hz rating, as well as CE Mark approval useful for OEM’s with worldwide customers. The three-phase versions of the D3 motors feature a compact TEFC enclosure and a range from 1/3 to 3HP. The single phase D3 motors have an ODP enclosure and a range from 1/3 to 2HP.

Adjustable Casing
C Series pump casings are axially adjustable allowing the use of custom impellers for OEM applications and to allow restoration of performance by closing up the internal clearances that develop over the course of a unit’s extended service life.
MTH Pumps DC10 Washdown 12 Volt Pump
100% Solid Stainless Steel Construction
Capacities to 25 GPM
Heads to 92 Feet (40 PSI)
Temperatures from -20° to 250°F
End Suction and Top, Bottom, or Side Discharge
12VDC 1HP TENV Motor
Weighs 48 LBS
MTH Pumps D Series Centrifugal Pumps
Capacities to 240 GPM
Heads to 360 Feet
Horizontal Close Coupled

MTH D Series
Close-coupled centrifugal pumps represent the most economical, high performance alternative for high flow applications involving low to moderate pressures (heads to 360 feet).
By combining the latest concepts in centrifugal pump design with precision computer controlled manufacturing, the D Series pumps deliver high efficiency operation even at low NPSH. Costs are controlled by efficient manufacturing processes and highly optimized pump designs. Maintenance costs are kept to a minimum by combining an easily serviceable design with the use of high quality components to provide long life.

Casing
Standard casing construction of all units is ASTM A48 Class 30 cast iron. All bronze casings are currently available in the D71 and D91 Series only. In all models, the discharge can be rotated to any 90° position and NPT suction and discharge ports are standard. Back pull out design allows the pump to be serviced without disturbing the piping. The volute was designed to maximize hydraulic efficiency.

Mechanical Seal
Type 21 Buna-N seal is rated to 225°F and pressures to 175PSI and is used on the D51, D61, D71, and D91 Series. The carbon seal face mates with a ceramic seat providing years of trouble-free service. The seal cooling jacket high temperature version of the D51 unit uses a Type 21 Viton seal that is rated to 400°F with pressures to 175PSI. Alternate seals available upon request.

Impeller
The hydraulic design of the enclosed impellers maximizes pressure and capacity while minimizing horsepower. All standard D Series models feature a cast bronze impeller, while the high temp jacketed version of the D51 utilizes a vacuum cast enclosed impeller made of CDA87500 silicon bronze for high temperature resistance. This high temp D51 also features a pressed-on throttle bushing which fits snugly into the motor bracket to restrict hot fluid circulation into the cooled seal cavity.

Motor Bracket
Standard construction for motor backets is ASTM A48 Class 30 cast iron, while the D71 and D91 Series are also available in bronze. Precise machining of the D Series motor brackets allows easy assembly of the pumps. A 1/8" NPT hole is provided in the motor bracket for a seal flush line if desired. The D51 also comes in a high temp version that has a motor bracket with a cast-in seal cooling jacket which allows fluids up to 500°F to be pumped without damage to the mechanical seal or the motor. The seal chamber is specially machined to allow minimal hot liquid circulation, which keeps the area cool. The water jacket has 1/2" NPT ports every 90° for easy water line connections.

Motor
The NEMA JM frame motor found on the D71 and D91 Series utilizes a high carbon steel shaft. The NEMA 56J frame motors used on the D51 and D61 Series utilize a 416 stainless steel shaft. The motor's heavy duty ball bearings withstand heavy axial and radial thrust loads. Standard enclosure type is open drip-proof with alternatives available on request.

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