Tuthill - Lubrication and Circulation Pumps

Tuthill - Legendary Success

The L & C Series cast iron positive displacement pumps have been the industry standard for Lubrication & Circulation for over 75 years. They were originally designed under James B. Tuthill, the company’s founder. Tuthill has continuously worked to improve these pumps to fit an ever-growing range of lubrication applications. The result is a family of reliable internal gear pumps that are ideal for custom OEM lubrication, low-pressure hydraulics, transfer, circulating, burner oil feed, and many other industrial pump applications.

Performance Ranges

• Flow Range 0.9 to 84 GPM (3.4 to 318 LPM)
• Differential Pressure to 300 PSI (20.7 BAR)
• Viscosity 40 to 25000 ssu (4 to 5394 cst)
• Temperature to 375 ºF (190 ºC)

Simple, Compact Design Offers High Efficiency, Longer Life, Flexibility And Reliability

Precisely machined and assembled with only two moving parts, Tuthill L & C series pumps achieve and retain their reliability over a wider range of viscosities than alternative pump designs. L & C series pumps have mounting, driving, and sealing options to suit all your application needs. The pumping action is based on a rotor, idler gear, and a cover cast with a crescent-shaped partition. This design allows the pump to handle a wide range of viscosities while sustaining a constant flow regardless of pressure. The non-pulsating flow also runs substantially quieter than other pump designs. With minimal to moderate wear, our internal gear pumps outperform other pumping technologies.

As the pump starts, the teeth come out of the mesh, increasing the volume. This creates a partial vacuum, drawing the liquid into the pump through the suction port.

The liquid fills the spaces between the idler and rotor teeth and is carried past the crescent partition through the pressure side of the pump.

When the teeth mesh on the pressure side, the liquid is forced from the spaces and out through the discharge port.

Pump Features

L Pumps

• Internal Gear Design
• Cast Iron Construction
• Standard Single Mechanical Seal
• Compact and Flexible Drive Options
• Top Porting
• Options Available
• Tuthill’s Reversing Feature
• Internal Relief Valve Available
• Adapter Kit for NEMA C-Face Mounting
• Shaft Modification for Close Coupled Mounting
• Carbon Idler, Carbon Bushings, and Outboard Bearing

C Pumps

• Internal Gear Design
• Cast Iron Construction
• Flexible Mounting, Sealing, and Driving Options
• Standard with O-Ring Case Seals
• Top Porting
• Options Available
• Tuthill’s Reversing Feature
• Internal Relief Valve Available
• Flange and Foot Mount Configurable
• Carbon Idler, Carbon Bushings, and Outboard Bearing

Related OEM Solutions

Cartridge Pumps

• Internal Gear Cartridge Design
• Cast Iron Construction
• Flow Range to 6 GPM (22.7 LPM)
• Differential Pressures to 150 PSI (10.3 BAR)
• Compact Design Mounts Directly into OEM Equipment
• Multiple Porting and Driving Options

Stripped Pumps

• Internal Gear Design
• Cast Iron Construction
• Flow Range to 84 GPM (318 LPM)
• Differential Pressures to 150 PSI (10.3 BAR)
• Partial Pump Assemblies Built Directly into OEM Equipment
• Available with Tuthill’s Reversing Feature

L Series Specification Data

• Differential Pressures to 300 PSI (20.7 BAR)
• Temperatures to 375 ºF (190 ºC)
• Viscosities 40 to 5000 ssu (4 to 1078 cst)

Note: For speeds above 1800 RPM and/or viscosities above 5000 ssu (1078 cst) consult factory

C Series Specification Data

• Differential Pressures to 300 PSI (20.7 BAR)
• Temperatures to 375 ºF (190 ºC)
• Viscosities 40 to 5000 ssu (4 to 1078 cst)

Note: For speeds above 1800 RPM and/or viscosities above 5000 ssu (1078 cst) consult factory

Unique Reversing Feature

This Tuthill innovation allows positive reversing action without the use of valves. Port positions remain constant regardless of the direction of shaft rotation. It is ideal for use in power transmission applications where the drive shaft direction changes, but the direction of flow must remain constant. Other applications where shaft rotation is unknown, the reversing feature allows the customer to specify the suction and discharge ports.

When shaft rotation changes from counter-clockwise to clockwise, the idler carrier (including the idler gear and crescent) automatically rotates 180º through the suction zone to the position shown in the drawing below. This changes the direction of the flow within the pump without changing port positions. On resumption of counter-clockwise rotation, the crescent will swing back to the original position.

About Tutthill 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. Know More

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