20-1000 Gallon Mixers

Medium sized mixers, also called “portables”, are sized and powered to handle most applications in the industry that process from 30 to 1000 gallons. These mixers are the most flexible and versatile for mid-sized operations. MXD supplies light and heavy duty clamp mounts, drum lid mounted and bung mount mixers, as well as tote bracket mounts. Motors can be electric or air powered, and our electric designs can be specified explosion proof. For clean operations we can provide sealed systems and stainless components.

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We have standard designs with a very wide variety of shaft-impeller combinations which can be further customized to almost any configuration. This category of agitator usually goes under the title of "Drum Mixer" for this is their primary use. Many companies have found that mixing in the shipping drum saves in transfer losses and tank investment. MixerDirect's clamp on drum agitator line can attach onto the side of steel drums and can be adjusted to almost angle. When adjusted properly the operator can achieve mixing that simulates a baffled tank. Some companies when requesting drum mixers, need for the drum to remain covered to reduce vapor loss. The drum lid mounted mixer is ideal for that circumstance, with an integrated lid that will fit right on top of your open top drum. Call us for assistance regarding your drum mixing needs (812) 202-4047 or contact us through the website for industrial mixing equipment and we'll get back to you the same day.

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Electric Direct Drive Heavy Duty Clamp Mount

1 HP Electric Direct Drive Heavy Duty Clamp Mount

HDC100EDD $1,454

The Heavy Duty Clamp mount mixers are the work horses of Mixer Direct’s portable mixer line. With heat treated aluminum housings you get both outstanding durability and lightweight portability. Each mixer include a lower support bear taking the radial shaft load off of the motor/gearbox extending their longevity. Outstanding adjustability allows shaft positioning on two axis of rotation. Each mixer comes standard with an oversized 316SS shaft and 316SS set screw attached propellers. Many options are available on these mixer with multiple impeller types, stand mounting options, and varied shaft lengths.

variable speed direct drive heavy duty clamp mount

1 HP Variable Speed Direct Drive Heavy Duty Clamp Mount

HDC100VDD $2,197

The Heavy Duty Clamp mount mixers are the work horses of Mixer Direct’s portable mixer line. With heat treated aluminum housings you get both outstanding durability and lightweight portability. Each mixer include a lower support bear taking the radial shaft load off of the motor/gearbox extending their longevity. Outstanding adjustability allows shaft positioning on two axis of rotation. Each mixer comes standard with an oversized 316SS shaft and 316SS set screw attached propellers. Many options are available on these mixer with multiple impeller types, stand mounting options, and varied shaft lengths. VFD unit for variable speed will read out Hz and uses a membrane control pad.

sanitary tri clamp mixer

1 HP Explosion Proof Electric Gear DriveTri-Clamp Mount Mixer

TCM100XGD $3,584

Designed to attach to a 3" Tri-Clamp mount fittings, Mixer Direct's Tri-Clamp Mount Mixers offer extreme durability and versatility. Engineered with outstanding durability and lightweight portability these agitators come equipped with stainless steel propellers. A high performance seal ensures a sealed environment. A 5:1 turndown ratio provides the torque necessary to mix more viscous fluids. Mixer Direct offers many customization options including longer shafts, varying gear ratios, and many impeller types. We can customize the Tri-Clamp Mount Mixer to fit any application just call one of our sales engineers or fill out a contact form!

electric direct drive heavy duty clamp mount

1 HP Explosion Proof Direct Drive Heavy Duty Clamp Mount

HDC100XDD $1,878

The Heavy Duty Clamp mount mixers are the work horses of Mixer Direct’s portable mixer line. With heat treated aluminum housings you get both outstanding durability and lightweight portability. Each mixer include a lower support bearing taking the radial shaft load off of the motor/gearbox extending their longevity. Outstanding adjustability allows shaft positioning on two axis of rotation. Each mixer comes standard with an oversized 316SS shaft and 316SS set screw attached propellers. Many options are available on these mixers with multiple impeller types, stand mounting options, and varied shaft lengths. Explosion Proof mixers are made for use in rated environments.

electric gear drive heavy duty clamp mount

1 HP Electric Gear Drive Heavy Duty Clamp Mount

HDC100EGD $2,495

The Heavy Duty Clamp mount mixers are the work horses of Mixer Direct’s portable mixer line. With heat treated aluminum housings you get both outstanding durability and lightweight portability. Each mixer include a lower support bear taking the radial shaft load off of the motor/gearbox extending their longevity. Outstanding adjustability allows shaft positioning on two axis of rotation. Each mixer comes standard with an oversized 316SS shaft and 316SS set screw attached propellers. Many options are available on these mixer with multiple impeller types, stand mounting options, and varied shaft lengths.

1 HP Variable Speed Direct Drive Flange Mount

1 HP Variable Speed Direct Drive Flange Mount

FLG100VDD $2,579

This line of mixers from Mixer Direct attaches to a 2.5”-150# ANSI flange. It is designed for heavy duty applications with an extra flange mounted support bearing and all welded construction. This mixer is highly customizable with multiple gear ratios, seal packages, flange sizes, impellers and shaft lengths for your application. VFD unit for variable speed will read out Hz and uses a membrane control pad.

explosion proof gear drive heavy duty clamp mount

1 HP Explosion Proof Gear Drive Heavy Duty Clamp Mount

HDC100XGD $2,919

The Heavy Duty Clamp mount mixers are the work horses of Mixer Direct’s portable mixer line. With heat treated aluminum housings you get both outstanding durability and lightweight portability. Each mixer include a lower support bearing taking the radial shaft load off of the motor/gearbox extending their longevity. Outstanding adjustability allows shaft positioning on two axis of rotation. Each mixer comes standard with an oversized 316SS shaft and 316SS set screw attached propellers. Many options are available on these mixers with multiple impeller types, stand mounting options, and varied shaft lengths. Explosion Proof mixers are made for use in rated environments.

Sanitary Tri Clamp Mount Mixer

1 HP Explosion Proof Electric Direct Drive Tri-Clamp Mount Mixer

TCM100XDD $2,357

Designed to attach to a 3" Tri-Clamp mount fittings, Mixer Direct's Tri-Clamp Mount Mixers offer extreme durability and versatility. Engineered with outstanding durability lightweight portability these agitators come equipped with stainless steel propellers. A high performance seal ensures a sealed environment. Mixer Direct offers many customization options including longer shafts, varying gear ratios, and many impeller types. We can customize the Tri-Clamp Mount Mixer to fit any application just call one of our sales engineers or fill out a contact form!

pharma tri clamp mixer

1.5 HP Electric Gear Drive Sanitary Stainless Steel Tri-Clamp Mount Mixer

TCM150EGD-S $5,993

Designed to attach to a 3" Tri-Clamp mount fittings, Mixer Direct's Tri-Clamp Mount Mixers offer extreme durability and versatility. These stainless steel washdown industrial mixers were constructed to be used in the most sterile environments. Engineered with easily cleanable surfaces, outstanding durability, and lightweight portability these agitators come equipped with stainless steel propellers. A high performance seal ensures a sealed environment rated for sterile applications. A 5:1 turndown ratio provides the torque necessary to mix more viscous fluids. Mixer Direct offers many customization options including longer shafts, varying gear ratios, and many impeller types. We can customize the Tri-Clamp Mount Mixer to fit any application just call one of our sales engineers or fill out a contact form!

1 HP Variable Speed Gear Drive Plate Mount

1 HP Variable Speed Gear Drive Plate Mount

PLT100VGD $3,618

The Plate Mount Mixer typically is bolted to two channels across the top of the tank. It is designed for heavy duty applications with an extra flange mounted support bearing and all welded construction. This mixer is highly customizable with multiple gear ratios, seal packages, flange sizes, impellers and shaft lengths for your application. VFD unit for variable speed will read out Hz and uses a membrane control pad.

variable speed gear drive heavy duty clamp mount

1 HP Variable Speed Gear Drive Heavy Duty Clamp Mount

HDC100VGD $3,238

Download The Heavy Duty Clamp Mount Variable Gear Drive Tech Sheet The Heavy Duty Clamp mount mixers are the work horses of Mixer Direct’s portable mixer line. With heat treated aluminum housings you get both outstanding durability and lightweight portability. Each mixer include a lower support bear taking the radial shaft load off of the motor/gearbox extending their longevity. Outstanding adjustability allows shaft positioning on two axis of rotation. Each mixer comes standard with an oversized 316SS shaft and 316SS set screw attached propellers. Many options are available on these mixer with multiple impeller types, stand mounting options, and varied shaft lengths. VFD unit for variable speed will read out Hz and uses a membrane control pad.

1 HP Variable Speed Gear Drive Flange Mount

1 HP Variable Speed Gear Drive Flange Mount

FLG100VGD $3,491

This line of mixers from Mixer Direct attaches to a 2.5”-150# ANSI flange. It is designed for heavy duty applications with an extra flange mounted support bearing and all welded construction. This mixer is highly customizable with multiple gear ratios, seal packages, flange sizes, impellers and shaft lengths for your application. VFD unit for variable speed will read out Hz and uses a membrane control pad.

1 HP Variable Speed Gear Drive Economy Clamp Mount

1 HP Variable Speed Gear Drive Economy Clamp Mount

ECM100VGD $3,189

These clamp mount mixers are short on price and long on function. Ideal for use in medium size batchs and where increased viscosity requires higher torque. Adjustable positioning, light weight and easy removability makes the clamp mount a popular choice for applications that need a high level of versatility. All of the materials contacting the fluid are constructed of 316 grade stainless steel, ensuring a high level of resistence to chemical attack. A square pitched left hand propeller is included with the mixer, providing a significant amount of flow per horsepower.

sanitary white washdown tri clamp mixer

1 HP Variable Speed Electric Gear Drive White Washdown Tri-Clamp Mount Mixer

TCM100VGD-W $5,587

The Mixer Direct sanitary tri-clamp mixer line is built for sanitary applications requiring a wash down design. This line is constructed for food, various beverage and pharmaceutical applications, or any application requiring a high degree of cleanability. The sanitary tri-clamp ensures suitability for sanitary requirements that would necessitate a full wash down of the equipment. This white wash down construct protects against most types of chemical, moisture, or humidity related corrosion, and other washdown processes taking place in the vicinity where overspray might occur.

sanitary tri clamp mixer

1 HP Variable Speed Electric Gear Drive Tri-Clamp Mount Mixer

TCM100VGD $3,998

Designed to attach to a 3" Tri-Clamp mount fittings, Mixer Direct's Tri-Clamp Mount Mixers offer extreme durability and versatility. Engineered with outstanding durability and lightweight portability these agitators come equipped with stainless steel propellers. A high performance seal ensures a sealed environment. A 5:1 turndown ratio provides the torque necessary to mix more viscous fluids. This mixer is equipped with a NEMA 4X washdown Variable speed controller allowing precise RPM control. Mixer Direct offers many customization options including longer shafts, varying gear ratios, and many impeller types. We can customize the Tri-Clamp Mount Mixer to fit any application just call one of our sales engineers or fill out a contact form!

pharma grade tri clamp mixer

1 HP Variable Speed Electric Gear Drive Sanitary Stainless Steel Tri-Clamp Mount Mixer

TCM100VGD-S $7,294

Designed to attach to a 3" Tri-Clamp mount fittings, Mixer Direct's Tri-Clamp Mount Mixers offer extreme durability and versatility. These stainless steel washdown industrial mixers were constructed to be used in the most sterile environments. Engineered with easily cleanable surfaces, outstanding durability, and lightweight portability these agitators come equipped with stainless steel hydrofoil impellers. A high performance seal ensures a sealed environment rated for sterile applications. A 5:1 turndown ratio provides the torque necessary to mix more viscous fluids.This mixer is equipped with a NEMA 4X washdown Variable speed controller allowing precise RPM control. Mixer Direct offers many customization options including longer shafts, varying gear ratios, and many impeller types. We can customize the Tri-Clamp Mount Mixer to fit any application just call one of our sales engineers or fill out a contact form!

sanitary white washdown tri clamp mixer

1 HP Variable Speed Electric Direct Drive White Washdown Tri-Clamp Mount Mixer

TCM100VDD-W $3,063

The Mixer Direct sanitary tri-clamp mixer line is built for sanitary applications requiring a wash down design. This line is constructed for food, various beverage and pharmaceutical applications, or any application requiring a high degree of cleanability. The sanitary tri-clamp ensures suitability for sanitary requirements that would necessitate a full wash down of the equipment. This white wash down construct protects against most types of chemical, moisture, or humidity related corrosion, and other washdown processes taking place in the vicinity where overspray might occur.

sanitary tri clamp mixer

1 HP Variable Speed Electric Direct Drive Tri-Clamp Mount Mixer

TCM100VDD $2,808

Designed to attach to a 3" Tri-Clamp mount fittings, Mixer Direct's Tri-Clamp Mount Mixers offer extreme durability and versatility. Engineered with outstanding durability and lightweight portability these agitators come equipped with stainless steel propellers. A high performance seal ensures a sealed environment.. This mixer is equipped with a NEMA 4X washdown Variable speed controller. Mixer Direct offers many customization options including longer shafts, varying gear ratios, and many impeller types. We can customize the Tri-Clamp Mount Mixer to fit any application just call one of our sales engineers or fill out a contact form!

1 HP Variable Speed Direct Drive Plate Mount

1 HP Variable Speed Direct Drive Plate Mount

PLT100VDD $2,692

The Plate Mount Mixer typically is bolted to two channels across the top of the tank. It is designed for heavy duty applications with an extra flange mounted support bearing and all welded construction. This mixer is highly customizable with multiple gear ratios, seal packages, flange sizes, impellers and shaft lengths for your application. VFD unit for variable speed will read out Hz and uses a membrane control pad.

1 HP Variable Speed Direct Drive Economy Clamp Mount

1 HP Variable Speed Direct Drive Economy Clamp Mount

ECM100VDD $2,443

Download the economy clamp mount variable speed direct drive mixer tech sheet These clamp mount mixers are short on price and long on function. Ideal for use in small batchs and where some shear action is required. Adjustable positioning, light weight and easy removability makes the clamp mount a popular choice for applications that need a high level of versatility. All of the materials contacting the fluid are constructed of 316 grade stainless steel, ensuring a high level of resistence to chemical attack. A square pitched left hand propeller is included with the mixer, providing a significant amount of flow per horsepower.

top entry plate mount side view

1 HP Top Entry Plate Mount Mixer 5:1 Gearbox 14" High Efficiency Impeller

TPL010350 $2,554

Mixer Direct's Top Entry Mixers handle the largest mixing applications in the industry. This heavy duty mixer comes with a thick plate designed to bolt to the top of a frame or tank. These durable mixers come equipped with low shear dispersion blades capable of mixing high viscosity fluids. The 5:1 gearbox on this industrial mixer features a premium helical drive, a hollow shaft cover, and an oil sight glass. The top entry mixer comes equipped with a 1 HP electric motor and a 14” high efficiency impeller. The top entry mixer comes fitted with a 1" diameter shaft 37.5" long. Our customization options include longer shafts, multiple gear ratios, a range of motor horsepower, and varied impellers to encompass any mixing need. Download the TPL010350 Tech Sheet

top entry flange mount

1 HP Top Entry Flange Mount Mixer 5:1 Gearbox 14" High Efficiency Impeller

TFL010350 $3,014

Mixer Direct's Top Entry Mixers handle the largest mixing applications in the industry. Designed to bolt to the top of a frame or tank these durable mixers come equipped with low shear dispersion blades capable of mixing high viscosity fluids. The flange mixer's utility lies in its ability to attach to an existing connection. Mixer Direct can customize the flange to adapt to the ANSI flange for your application. The 5:1 gearbox on this industrial mixer features a premium helical drive, a hollow shaft cover, and an oil sight glass. The top entry mixer comes equipped with a 1 HP electric motor and a 14” high efficiency impeller. The 304 stainless steel flange comes with Teflon lip seals for optimal sealing power. The top entry mixer comes fitted with a 1" diameter shaft 37.5" long. Our customization options include longer shafts, multiple gear ratios, a range of motor horsepower, and varied impellers to encompass any mixing need. Download the TPL010350 Tech Sheet

1 HP Explosion Proof Gear Drive Plate Mount

1 HP Explosion Proof Gear Drive Plate Mount

PLT100XGD $3,309

The Plate Mount Mixer typically is bolted to two channels across the top of the tank. It is designed for heavy duty applications with an extra flange mounted support bearing and all welded construction. This mixer is highly customizable with multiple gear ratios, seal packages, flange sizes, impellers and shaft lengths for your application. Explosion Proof models are designed for rated areas.

1 HP Explosion Proof Gear Drive Flange Mount

1 HP Explosion Proof Gear Drive Flange Mount

FLG100XGD $3,186

This line of mixers from Mixer Direct attaches to a 2.5”-150# ANSI flange. It is designed for heavy duty applications with an extra flange mounted support bearing and all welded construction. This mixer is highly customizable with multiple gear ratios, seal packages, flange sizes, impellers and shaft lengths for your application. Explosion Proof models are designed for rated areas.

1 HP Explosion Proof Gear Drive Economy Clamp Mount

1 HP Explosion Proof Gear Drive Economy Clamp Mount

ECM100XGD $2,315

These clamp mount mixers are short on price and long on function. Ideal for use in medium size batchs and where increased viscosity requires higher torque. Adjustable positioning, light weight and easy removability makes the clamp mount a popular choice for applications that need a high level of versatility. All of the materials contacting the fluid are constructed of 316 grade stainless steel, ensuring a high level of resistence to chemical attack. A square pitched left hand propeller is included with the mixer, providing a significant amount of flow per horsepower.

1 HP Explosion Proof Direct Drive Plate Mount

1 HP Explosion Proof Direct Drive Plate Mount

PLT100XDD $2,384

The Plate Mount Mixer typically is bolted to two channels across the top of the tank. It is designed for heavy duty applications with an extra flange mounted support bearing and all welded construction. This mixer is highly customizable with multiple gear ratios, seal packages, flange sizes, impellers and shaft lengths for your application. Explosion Proof models are designed for rated areas.

1 HP Explosion Proof Direct Drive Flange Mount

1 HP Explosion Proof Direct Drive Flange Mount

FLG100XDD $2,274

This line of mixers from Mixer Direct attaches to a 2.5”-150# ANSI flange. It is designed for heavy duty applications with an extra flange mounted support bearing and all welded construction. This mixer is highly customizable with multiple gear ratios, seal packages, flange sizes, impellers and shaft lengths for your application. Explosion Proof models are designed for rated areas.

1 HP Explosion Proof Direct Drive Economy Clamp Mount

1 HP Explosion Proof Direct Drive Economy Clamp Mount

ECM100XDD $1,525

These clamp mount mixers are short on price and long on function. Ideal for use in small batchs and where some shear action is required. Adjustable positioning, light weight and easy removability makes the clamp mount a popular choice for applications that need a high level of versatility. All of the materials contacting the fluid are constructed of 316 grade stainless steel, ensuring a high level of resistence to chemical attack. A square pitched left hand propeller is included with the mixer, providing a significant amount of flow per horsepower.

sanitary white washdown tri clamp mixer

1 HP Electric Gear Drive White Washdown Tri-Clamp Mount Mixer

TCM100EGD-W $4,781

The Mixer Direct sanitary tri-clamp mixer line is built for sanitary applications requiring a wash down design. This line is constructed for food, various beverage and pharmaceutical applications, or any application requiring a high degree of cleanability. The sanitary tri-clamp ensures suitability for sanitary requirements that would necessitate a full wash down of the equipment. This white wash down construct protects against most types of chemical, moisture, or humidity related corrosion, and other washdown processes taking place in the vicinity where overspray might occur.

sanitary tri clamp mixer

1 HP Electric Gear Drive Tri-Clamp Mount Mixer

TCM100EGD $3,004

Designed to attach to a 3" Tri-Clamp mount fittings, Mixer Direct's Tri-Clamp Mount Mixers offer extreme durability and versatility. Engineered with outstanding durability and lightweight portability these agitators come equipped with stainless steel propellers. A high performance seal ensures a sealed environment. A 5:1 turndown ratio provides the torque necessary to mix more viscous fluids. Mixer Direct offers many customization options including longer shafts, varying gear ratios, and many impeller types. We can customize the Tri-Clamp Mount Mixer to fit any application just call one of our sales engineers or fill out a contact form!

1 HP Electric Gear Drive Plate Mount

1 HP Electric Gear Drive Plate Mount

PLT100EGD $2,898

The Plate Mount Mixer typically is bolted to two channels across the top of the tank. It is designed for heavy duty applications with an extra flange mounted support bearing and all welded construction. This mixer is highly customizable with multiple gear ratios, seal packages, flange sizes, impellers and shaft lengths for your application.

1 HP Electric Gear Drive Flange Mount

1 HP Electric Gear Drive Flange Mount

FLG100EGD $2,781

This line of mixers from Mixer Direct attaches to a 2.5”-150# ANSI flange. It is designed for heavy duty applications with an extra flange mounted support bearing and all welded construction. This mixer is highly customizable with multiple gear ratios, seal packages, flange sizes, impellers and shaft lengths for your application.

1 HP Electric Gear Drive Economy Clamp Mount

1 HP Electric Gear Drive Economy Clamp Mount

ECM100EGD $2,050

These clamp mount mixers are short on price and long on function. Ideal for use in medium size batchs and where increased viscosity requires higher torque. Adjustable positioning, light weight and easy removability makes the clamp mount a popular choice for applications that need a high level of versatility. All of the materials contacting the fluid are constructed of 316 grade stainless steel, ensuring a high level of resistence to chemical attack. A square pitched left hand propeller is included with the mixer, providing a significant amount of flow per horsepower.

sanitary white washdown tri clamp mixer

1 HP Electric Direct Drive White Washdown Tri-Clamp Mount Mixer

TCM100EDD-W $2,257

The Mixer Direct sanitary tri-clamp mixer line is built for sanitary applications requiring a wash down design. This line is constructed for food, various beverage and pharmaceutical applications, or any application requiring a high degree of cleanability. The sanitary tri-clamp ensures suitability for sanitary requirements that would necessitate a full wash down of the equipment. This white wash down construct protects against most types of chemical, moisture, or humidity related corrosion, and other washdown processes taking place in the vicinity where overspray might occur.

sanitary tri clamp mixers

1 HP Electric Direct Drive Tri-Clamp Mount Mixer

TCM100EDD $1,777

Designed to attach to a 3" Tri-Clamp mount fittings, Mixer Direct's Tri-Clamp Mount Mixers offer extreme durability and versatility. Engineered with outstanding durability and lightweight portability these agitators come equipped with stainless steel propellers. A high performance seal ensures a sealed environment. Mixer Direct offers many customization options including longer shafts, varying gear ratios, and many impeller types. We can customize the Tri-Clamp Mount Mixer to fit any application just call one of our sales engineers or fill out a contact form!

Pharma grade tri clamp mixer

1 HP Electric Direct Drive Sanitary Stainless Steel Tri-Clamp Mount Mixer

TCM100EDD-S $3,634

Designed to attach to a 3" Tri-Clamp mount fittings, Mixer Direct's Tri-Clamp Mount Mixers offer extreme durability and versatility. These stainless steel washdown industrial mixers were constructed to be used in the most sterile environments. Engineered with easily cleanable surfaces, outstanding durability, and lightweight portability these agitators come equipped with stainless steel propellers. A high performance seal ensures a sealed environment rated for sterile applications. Mixer Direct offers many customization options including longer shafts, varying gear ratios, and many impeller types. We can customize the Tri-Clamp Mount Mixer to fit any application just call one of our sales engineers or fill out a contact form!

1 HP Electric Direct Drive Plate Mount

1 HP Electric Direct Drive Plate Mount

PLT100EDD $1,972

The Plate Mount Mixer typically is bolted to two channels across the top of the tank. It is designed for heavy duty applications with an extra flange mounted support bearing and all welded construction. This mixer is highly customizable with multiple gear ratios, seal packages, flange sizes, impellers and shaft lengths for your application.

1 HP Electric Direct Drive Flange Mount

1 HP Electric Direct Drive Flange Mount

FLG100EDD $1,869

This line of mixers from Mixer Direct attaches to a 2.5”-150# ANSI flange. It is designed for heavy duty applications with an extra flange mounted support bearing and all welded construction. This mixer is highly customizable with multiple gear ratios, seal packages, flange sizes, impellers and shaft lengths for your application.

1 HP Electric Direct Drive Economy Clamp Mount

1 HP Electric Direct Drive Economy Clamp Mount

ECM100EDD $1,525

These clamp mount mixers are short on price and long on function. These clamp mixers are ideal for use in small batches and where some shear action is required. Adjustable positioning, light weight and easy removability makes the clamp mount mixer a popular choice for applications that need a high level of versatility. All of the materials contacting the fluid are constructed of 316 grade stainless steel, ensuring a high level of resistance to chemical attack. A square pitched left hand propeller is included with the clamp mixer, providing a significant amount of flow per horsepower.