1
1. Principles of operation
Liquid material chambers are located inside and air chambers are located outside of the DP-Fi
series pump.When compressed air is supplied to the air chamber “a” (see the left figure below) by the
switch valve of this pump, the center rod starts moving to the left to cause liquid in the liquid
material chamber “A” to be pushed out to the discharge port, and at the same time liquid is sucked
into the liquid material chamber “B”.
When the center rod moves full-stroke to the left, the switch valve is automatically switched,
compressed air is sent to the air chamber “b”, and the center rod moves to the right, that is, toward
the opposite direction (see the right figure).
As the result, liquid in the liquid material chamber “B” is pushed out to the discharge port, and at
the same time liquid is sucked into the liquid material chamber “A”.
Thorough repetition of this operation, liquid is repeatedly taken in and discharged out to construct
a diaphragm pump.
2. Tools and Others Required
2.1 General tools
・
Socket wrenches
13 mm , 19 mm
・
Flat head screw driver
・
Open-end wrenches
13 mm , 19 mm
・
Snap ring pliers
・
Hexagonal wrench
6 mm
・
Plyer
2.2 Dedicated tools
①
Valve cap remover (supplied)
Purpose: Removing the valve cap and
valve stopper.
(Part No. for DP-10Fi: 832516)
②
Valve cap remover (Fi/
□
/R only supplied)
Purpose:
DP-10Fi, DP-20Fi: Removing the valve cap
DP-20Fi: valve stopper.
(Part No. for DP-20Fi: 832517)
③
Guide holder remover (optional)
Purpose:
DP-10Fi, DP-20Fi: Removing the guide holder and spring seat.
(Part No. 832518)
Liquid material
chamber “B”
Air Chamber ”
ｂ
”
Air Chamber “a”
Air Chamber “
ｂ
”
Air Chamber “a”
Liquid material
chamber “A”
Liquid material
chamber “B”
Liquid material
chamber “A”