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Introduction
The 4000 Series pumps have been certified to the requirements of the ATEX Directive 94/9/EC for use in Category II, Group 2 G
applications. Read this manual before operating or working on the 4000 Series pumps. If additional information is required to facilitate
operation or maintenance, contact the authorized Tuthill distributor shown at the back of this service manual.
4100 & 4300 Series pumps are compact, highly efficient, cast iron, positive displacement rotary pumps with mechanical seals and have
been designed and manufactured to provide years of service under normal operating conditions. Illustrations used in this manual
are for reference purposes only. Consult the factory or an authorized Tuthill distributor for proper part identification. When ordering
replacement parts, provide as much detail as possible to ensure correct parts are provided. Details should include the full model
number, name of part, and part number (if known).
General Description
Series 4100 Models 4101-4108 & 4122 - 4124
Tuthill’s 4100 and 4120 pumps are available in various sizes each, with nominal capacities ranging from 0.5 to 12.9 GPM (1.9 to 49
LPM). These pumps can handle inlet pressure to 250 PSI (17 bar) and differential pressure to 500 PSI (34 bar) and have a maximum
discharge pressure of 500 PSI (17 bar). Differential and maximum pressure is limited to 300 PSI (20 bar) in model 4108. These pumps
are self-priming and particularly suited to handle liquids of 35 to 1000 SSU (2 to 200 centipoise.) Higher viscosities can be handled at
reduced speeds.
A mounting foot is available as an option, as is an internal relief valve. These pumps are bi-rotational (unless outfitted with the optional
relief valve) and designed for direct drive at standard motor speeds, with modifications available for indirect drive.
Model 4100 pumps include a mechanical seal and carbon graphite idler and housing bushings. Model 4120 pumps include an abrasion
resistant mechanical seal, carbon graphite idler bushing, ceramic housing bushing, Tutrided cover and induction hardened rotor.
Series 4300 Models 4312-4316
Series 4300 are flange mount pumps with mechanical seal. They are available in five sizes each with capacities from 6 to 84 GPM
(23 to 318 LPM.) These pumps can handle inlet pressure to 250 PSI (17 bar), maximum discharge pressure to 300 PSI (20 bar), and
differential pressure to 150 PSI (10 bar.).
A mounting foot is available as an option, as is an internal relief valve. These pumps are designed for direct drive at standard motor
speeds, with modifications available for indirect drive. These pumps include a mechanical seal, carbon graphite idler and bracket
bushings.