Tuthill Process Pumps
Built On A Time-Tested Design & More Than 90 Years Of Gear Pump Engineering Experience
Tuthill offers the Heavy Duty (HD) Series for the most demanding applications – slurries, high viscosity products, suspended solids, concentrated acids, chemicals, high-temperature liquids, sludge, resins, sewage and scum, paints, polymers, plastics, pharmaceuticals, foods, and shear sensitive fluids.
This rotary positive displacement, circumferential piston pump is Tuthill’s severe-duty problem solver. Heavy-duty construction provides longer life in the toughest pumping applications.
A CLASSIC DESIGN WITH LEGENDARY PERFORMANCE
The secret behind the HD Series success is external bearing support on both sides of the impellers which enables the pump to handle high pressure and pressure spikes associated with sudden surges of viscous mass. The load diagrams below show the rigid HD design compared to cantilevered designs with shaft deflections that can result in galling and seizing of the pump.
Globalgear Design Features for extended seal life Include:
- Flow Range to 520 GPM (118 M3/Hr)
- Differential Pressure to 450 PSI (31.0 BAR)
- Viscosity to 4,400,000 cts
- Temperature to 600 °F (315 °C)
- Self Priming to 14 Feet
Customizing Your Tuthill HD Pump
HD Pumps are very versatile and can be customized to meet the requirements of specific applications. Suction and discharge ports can be reversed by changing shaft rotation.
- Heat Jackets
- Relief Valves
- Special Clearances
- High Pressure Flanges
- Special Construction: Abrasive Fluid, High Temperatures
The HD Advantage
Single lobe impellers provide maximum strength for highly viscous fluids and slurries, along with high discharge pressure and minimal shear characteristics on fluids
- External timing gears in separate oil filled reservoir provides no metal to metal contact synchronous impeller action that reduces shear and allows intermittent run dry without damage to the pump
- Oil lubricated roller bearings provide support for maximum radial loading in models 70A, 120A, 330, and 600.
- Constant diameter shafts (no steps in torque transmission areas) for maximum strength and minimum deflection.
- Housing bushing, positioned under maximum radial load, assuring minimum shaft deflection.
- A selection of sealing solutions is offered including TUFFSEALL™ heavy duty mechanical seals, and packing.
- Housing and gear case are foot mounted to minimize distortion and vibration.
- Heavy duty, grease lubricated, double-row ball bearings for combined radial loading and axial positioning.
- Casings and gear case are precision machined and dowel pin aligned. Procedure results in full interchangeability should field replacement be required.
No Metal-To-Metal Contact In The Completely Isolated Fluid Chamber
Cartridge Lip Seal Technology has been successfully applied to a number of HD pump applications to address the requirements of leak free performance with intermittent run dry conditions. Optional power monitors are offered as run dry protection and are recommended for use with single mechanical seals where run dry conditions are possible.
- TUFFSEALLTM (Triple Lip Cartridge Seal)
- Food Grade Packing
- Packing with Flush Arrangements
- Standard PTFE / Graphite Packing
- Single or Double Slurry Seals
- Solvent Compatible O-Rings
- Engineered Packing
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CAUTION: The fluid being pumped must always be specified. Applications above 200 PSI (13.8 BAR), 350 ºF (177 ºC), or 200 RPM must be reviewed by Tuthill to insure proper pump selection.
Standard Materials Of Construction
- HOUSING: Ductile Iron, 316 Stainless Steel
- HOUSING BEARING: DU/Bronze in Model 330, Carbon
- FACEPLATE: Ductile Iron, 316 Stainless Steel
- FACEPLATE BEARING: Outboard Ball Bearing
- IMPELLERS: Ductile Iron, 316 Stainless Steel
- SHAFTS: 17-4 Stainless Steel
- GEAR CASE: Gray Iron
About Tuthill Pump Group
Tuthill Pump Group has been providing positive displacement lubrication pumps for demanding OEM applications since 1927. Since that time, our product portfolio has developed to expand into a variety of markets and applications. Tuthill Pump products successfully handle applications from an extremely low-flow capacity with a high level of accuracy, to applications that are nearly solid in consistency with abrasive characteristics.