12
2) Replacing Inlet and Outlet Valves
(it is recommended that valves be replaced simultaneously with diaphragms)
Use tools No.1, 2, 3, 4, 6, 7and 8.
2) -1. DTC-22
(1) Remove the front panel, top panel, and pump
head cover. Remove in the sequence described in
1) Removing Diaphragms (1)~(5).
(2) Remove the cross recessed Pan Head Screw
(M4x16), separate the pump head and valve
retainer, and remove the inlet and outlet valves.
See Photo 17.
(3) Disassemble the other pump ahead in the same
manner, and remove the inlet and outlet valves.
(4) Clean the pump ahead and valve retainers with
solvent.
(5) Fit the new inlet and outlet valves.
Note: Ensure that the valves are fitted correctly as shown in Photos 18 and 19.
(6) Fit the valve retainers to the pump heads.
Note: Ensure that the inlet and outlet valve O rings are not crushed.
Note: Repeatedly tighten bolts in diagonal pairs to 0.4Nm.
(7) Connect the two pump heads and fit to the casing. Fit in the sequence described in 1)
Replacing Diaphragms, (11)~(17).
2) -2. DTC-22K
* Replace the inlet and outlet valves as shown in DTC-22, (2)~(7).
pump head A
Assemble in
(1)
Assemble in
order (2), (3)
Assemble in
order (1), (3)
Assemble in
(2)
Photo 19
Place facing
downwards
1. Inlet and outlet
valve
Ａ
2. Inlet and outlet
valve
B (with hole)
3. Valve holder
(translucent)
Photo 18
②
①
Hole
③
pump head B
Valve retainer
Cross recessed Pan
Head Screw
(M4x16)
Photo 17
