A.R.I. RP500 EN - Manual (Page 2)

PARTS LIST TROUBLE SHOOTING GUIDE
1. Relief valve continuously
discharges during no-flow
conditions.
2. Relief valves discharges
continuously during flow and
no-flow conditions.
3. Relief valve discharges
intermittently in a "spitting"
action during no-flow condition.
4. Relief valve does not open
during field test no.1
5. No. 6 check valve fails to
hold backpressure.
6. Pressure differential across
no. 5 check valve is low during
field test no. 3 a (does not meet
0.2 bar minimum)
a. No. 5 check valve fouled with
debris.
b. No. 6 check valve fouled with
debris coupled with a backpressure
condition.
a. Relief valve fouled with debris.
b. Damaged diaphragm (allows water
to pass through, from inlet to zone).
c. The passage to inlet side of
diaphragm plugged.
Pressure fluctuations (water hammer)
from supply.
a. Outlet shut-off valve (#2) not
closed completely.
b. Test equipment improperly
installed.
a. Outlet shut-off valve (#2) not
closed completely.
b. No. 6 check valve fouled with
debris.
a. No. 6 check valve fouled with
debris.
b. Upstream pressure fluctuations
causing inaccurate gauge reading.
a. Inspect and clean the seat and seal.
b. Inspect and clean the seat and seal.
a. Inspect and clean relief valve seat
disk and seat.
b. Replace the relief valve kit.
c. Inspect and clean passage in cover
and body.
Eliminate or reduce pressure
fluctuations.
a. Close outlet shut-off valve (#2) or
inspect for possible through leakage.
b. Recheck test procedure.
a. Close shut-off valve #2 or inspect
for possible through leakage.
b. Inspect and clean the seat and seal.
a. Inspect and clean the seat and seal.
b. Eliminiate pressure fluctuation.
Symptom Cause Corrective Action
1. Cover Assembly
2. Relief Valve Assembly
3. Relief Valve Spring
4. Retainer
5. Inlet Check valve Assembly
6. Outlet Check valve Assembly
7. Body Assembly
8. Test Cocks (#1, #2, #3)
9. Adaptor Assembly
10. Clamp Assembly
11. Funnel
12. Strainer
No. Part
1
2
3
4
5
6
Inlet Shut-off
Valve (#1)
Adaptor
Outlet Shut-off
Valve (#2)
8
10
9
9
10
11 12
7