8
EN
4. Troubleshooting
PROBLEM
POSSIBLE CAUSE
ACTION
1. Rapid discharge of water through the
relief valve followed by normal operation
Pressure fluctuation in the upstream water supply
network
None
2. Continuous discharge of water
through the relief valve in the course of
normal operation
The relief valve is dirty or damaged
Clean or replace the relief valve module
3. Continuous discharge of water
through the relief valve in safe mode
(normal flow or no flow)
a. The upstream valve is dirty or damaged
b. The piston seal of the relief valve is dirty or damaged
c. The downstream valve is dirty or damaged
a. Clean or replace the upstream valve
b. Clean or replace the relief valve module
c. Clean or replace the downstream valve
D
E
A
B
C
F
Repair kits for BA 009MC Backflow Preventer
DN
Complete kit
Draining valve assembly (A), First check module (B), Second check module (C),
Draining valve seat (cover) (D), Draining valve seat (body) (E)
60-65
2"1/2
2231722MCK
80
3"
2231822MCK
100
4"
2232300MCK
1500
6"
2232400MCK
200
8"
2232500MCK
250
10"
2232600MCK
