1. Getting acquainted with your Water Blaster
MERMAID E500-S
STD08
Page 10 of 52
Unloader/Safety Valve Protection
Machine’s unloader Valve /Safety Valve are factory pre- set. Purpose of the Unloader is to
regulate the machine pressure according to nozzle size. Safety valve is to prevent the machine
from over pressure.
Therefore, it is not recommended to adjust the setting on these valves. If setting is required, a
trained personal must performed the task. Incorrect adjustment to the valve may results machine
damage which will cause warranty void.
To prevent unauthorized adjustment to the valves, these valves are applied with tempered proof
sealant. Once the sealant cracked, it showed that unauthorized activities occur on the valves.
Unloader Valve
:
Safety Valve:
Tempered Proof
Sealant
Important!
The unloader valve is factory set. Only trained/
authorized personal is qualified to perform any
adjustment in the event the tempered sealant is
broken.
The Unloader Valve system is designed to allow a
small amount of water flow through the by-pass port
during operation. This is to ensure a smooth by-pass
operation, and prevents any unwanted pressure
spikes when the gun is shut. See pg. 30 for proper
setting/ adjustment of valve when required.
Tempered Proof
Sealant
