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3 Outline
TACMINA’s S series diaphragm type metering pumps are classified as follows according to
the type of diaphragm and the reduction method employed.
Type
Diaphragm type
Reduction method
Motor connection
SXDA Direct diaphragm Worm.wheel gear Directly coupled with an dexclusive vertical motor
SXWA Double diaphragm Worm.wheel gear Directly coupled with an exclusive vertical motor
SYDA Direct diaphragm
Planetary gear
Coupling connection for a motor with universal legs
SYWA Double diaphragm
Planetary gear
Coupling connection for a motor with universal legs
4 Structure
4-1
Drive Box Section
4-1-1 SX Type
The SX type pump is composed of the drive box equipped with a vertical four-pole exclusive
motor which is assembled together with the reduction mechanism and the pump head section.
Within this structure, the following parts are assembled.
(1) Worm.wheel Gear
Reduces the motor rotation to 1/14 or 1/28 of its original value.
(2) Eccentric Shaft
Converts rotary motion into reciprocal motion.
(3) Pump Shaft
Transmits reciprocal motion to the diaphragm.
(4) Spring-Return Mechanism
On the suction stroke, this mechanism forces the pump shaft back to ensure that a
constant discharge volume is maintained.
(5) Feed Flow Adjusting Mechanism
Adjusts the feed flow between 0 and 100% during operation.
* In the case that dial scale indication is less than “1”, the discharge amount may become
unstable.
Exclusive motor
Drive box
Pump head
SXDA data̲p01-p21
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