Handling instructions and Precautions
⓫
5. When replacing the seal kit, element, and bowl assembly, be
careful not to lose component parts.
6. Refer to the diagram at right when replacing the seal kit, ele-
ment, and bowl assembly.
NOTE
Always assemble the component parts correctly.
NOTE
The product is no longer under warranty if it is disassem-
bled or reassembled.
NOTE
The product is no longer under warranty if it is disassem-
bled or reassembled.
●
Installing provided options
1. When installing the various types of pressure gauges, always
apply the wrench on the square or hexagonal part of the pip-
ing connections.
2. Use a tightening torque of 2.21 to 3.69 ft
•
lbf if the various
pressure gauges are mounted on the NPT1/4 port plate pro-
vided.
3. There is a stopper on the NPT1/4 female thread of the NPT1/4
pressure port plate.
NOTE
Gripping the body of the various pressure gauges to tighten
them may damage component parts.
NOTE
If torque exceeding the specifications is applied, it may damage
component parts. Also, if torque below the specifications is
used, the screw may come loose and cause an air leak.
NOTE
Further tightening after the stopper has been reached may
damage component parts.
NOTE
The service life of the element varies depending on the
quality of air supplied to the IN port (primary) side. If there is
a lot of foreign matter in the air supply to the IN port (primary)
side, install a pre-filter on the IN port (primary) side or
change the element more often. As a guideline, change the
element after a year of use.
●
Replacing the pressure port plate, knob, and mounting ring
1. When replacing the pressure port plate, refer to "Replacing
the
□
1.181 in. integrated pressure gauge and pressure port
plate" on page
❿
.
2. When replacing the knob and mounting ring, refer to
"Removing the knob" and "Attaching the knob" on page
❿
.
●
Replacing the seal kit, element, and bowl assembly
1. To replace the seal kit, element, and bowl assembly, remove
the filter regulator or regulator and do the work on a work table.
2. The o-rings and other sealing materials (except for the diaphragm)
of the filter regulator and regulator are coated with grease.
3. Contact your nearest Koganei sales office or overseas depart-
ment if you are considering re-coating the o-rings and other
parts.
Recommended grease: Lithium Soap based No. 2 or equivalent
4. Periodically replace the element in the filter regulator.
O-ring large*
O-ring small*
O-ring medium*
Valve assembly*
Valve guide
Element
Bowl assembly
Stem
Spring
①
①
②
②
③
①
②
③
①
②
Filter regulator bowl side
FRZ3
□
FRZ4
□・
FRZ5
□
*
Parts in seal kit.
Assemb
ly
position
Assemb
ly
position
Assemb
ly position
Regulator and filter regulator knob side
RZ3
□・
F
RZ3
□
RZ4
□・
RZ5
□・
FRZ4
□・
FRZ5
□
Diaphragm assembly*
Spring
Bonnet
4 small screws
(tightening torque
0.797 to 0.974 ft
•
lbf)
4 small screws
(tightening torque
0.66 to 0.81 ft
•
lbf)
Knob
*
Parts in seal kit.
Adjusting assembly
Mounting ring
Filter regulator
Regulator