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.The L & C Series cast iron
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
Model C Series Circulation Pumps
2C, 3C, 4C, 5C, 6C
C Series Pump Specifications C Series Circulation Pumps
Model USGPM
Nominal Flow Rate
L/MIN
Nominal Flow Rate
2C
9.5
@
1800 RPM
36.0
@
1800 RPM
3C
18.0
@
1800 RPM
68.1
@
1800 RPM
4C
36.0
@
1800 RPM
136.3
@
1800 RPM
5C
60.0
@
1800 RPM
227.1
@
1800 RPM
6C
84.0
@
1800 RPM
410.4
@
1800 RPM
SIMPLE, COMPACT DESIGN OFFERS HIGH EFFICIENCY, LONGER LIFE, FLEXIBILITY, AND RELIABILITY
C Series Circulation Pumps 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.
Principle of operation of the Thai Khuong Pump C series tuthill gear pump
(1) As the pump starts, the teeth come out of mesh, increasing the volume. This creates a partial vacuum, drawing the liquid into the pump through the suction port.
(2) 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.
(3) When the teeth mesh on the pressure side, the liquid is forced from the spaces and out through the discharge port.
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.
Get the file of detailed specifications of the pump from the C Series Circulation Pumps – Tuthill here:
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