User Manual

6. TROUBLESHOOTING
DEMARCATION PHENOMENON
1. 1.
2. 2.
3. 3.
4. Foreign materials caught in valve seat. 4.
5. 5.
6. 6.
1. Foreign materials caught in valve seat. 1.
2. 2.
3. 3.
4. 4.
5. Valve adheres to the valve guide. 5.
1. 1.
1. 1.
2. 2.
3. 3.
4. 4.
5. 5.
6. 6.
1. 1.
2. 2.
1. 1.
1. Breakage of bowl. 1.
1. 1.
2. 2.
1. 1.
2. 2.
1. 1.
1. Drain level reaches the baffle plate. 1.
Note) The grease used recommends JX Nippon oil & Energy corporation diamond multipurpose No.2.
Too much drain
comes from the
piping of outlet
side.
Open the drain cock for draining and
replace the element.
The back flow
function does not
operate.
Check valve adheres to the check
valve assembly.
Replace the check valve assembly.
Diaphragm is damaged. Replace the diaphragm assembly.
No drainage when
the drain cock is
opened.
Air leaks from the
bowl.
Air leaks between
the bowl and the
body.
Blockage of outlet of the drain cock
due to solid foreign matter etc.
Air leaks from the
drain cock.
Open the drain cock for a few seconds for
blowing.
Revise the air circuit so that back
pressure does not exceed the set
pressure.
Back pressure exceeding the set
pressure is applied to the outlet.
Breakage of bowl packing.
The foreign matter caught in the valve
of the drain cock.
Air leaks between
the bonnet and
the body.
Loosened bonnet.
Diaphragm is damaged.
Valve spring is damaged.
Foreign material is caught in the
relieving valve seat.
Clog of the element.
Foreign materials caught in check
valve seat.
Replace the check valve assembly.
Foreign materials caught in valve seat.
Fasten the bonnet.
Foreign materials caught in check
valve seat.
Replace the check valve assembly.
Replace the check valve assembly.
Foreign materials caught in check
valve seat.
Replace the check valve assembly.
Replace the valve assembly.
Wash the sliding surface of valve "O" ring
and grease up.
Breakage of the seating part of the
drain cock.
Replace the bowl assembly.
Back flow
function
Replace the bowl packing.
Replace the diaphragm assembly.
10
Replace the bowl assembly.
Grease up before assembling.
Operational
Air leaks
Replace the bowl assembly.
Remove the valve guide to clean valve
and valve seat.
Valve rubber seat is damaged.
Replace the valve spring.
Replace the element.
Clean the relieving valve seat, or replace
the diaphragm assembly.
Large air
resistance
reduces flow rate.
Air leaks from the
bonnet exhaust
port.
Replace the valve spring.
Valve spring is damaged.
Set pressure does
not return to zero
when pressure
handle is
loosened.
Replace the valve spring.
Adjust spring is damaged.
Pressure
Remove the valve guide to clean valve
and valve seat.
Foreign materials caught in check
valve seat.
Flow rate
Replace the valve assembly.
Remove the valve guide to clean valve
and valve seat.
Valve rubber seat is damaged.
Valve rubber seat is damaged.
Pressure is not
regulated.
Refer to 「7. CONSTRUCTION / PARTS LIST」 (P11), 「10. DISASSEMBLY DRAWING」 (P25 to P29).
TROUBLE
POSSIBLE CAUSE REMEDY
Replace the adjust spring.
Opposite flow direction or opposite
installation of filter regulator.
Install piping or filter regulator correctly as
shown in manual.