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Overview
Introduction
Pump characteristics, features and part names are described in this sec-
tion.
Introduction
The TD series is the mechanically-driven diaphragm pump. Its pulse-reduction design en-
sures low flow pulsation without the need of an air chamber. A wide selection range of wet
ends allows for delivery of acid, alkaline, viscous liquid, slurry and solvent in various plants or
built-in applications.
Pump structure & Operating principle
Motor rotation is transmitted to an eccentric cam via a reduction gear and then converted to reciprocating
motion. Volumetric change occurs in the pump chamber as the diaphragm moves back and forth, so liquid is
delivered through the outlet with the assistance of the suction and discharge check valves.
Suction process
When the diaphragm moves back, negative pressure in the pump head opens the suction check valve to take
in liquid while closing the discharge check valve.
Discharge process
When the diaphragm moves forward, positive pressure in the pump head opens the discharge check valve to
deliver liquid while closing the suction check valve.
: Liquid flow
: Motor rotation
: Diaphragm reciprocation
: Valve movement
Gear unit
Motor
Pump head
Pump shaft
Check valve
Inlet
Diaphragm
Outlet
