Releasing And Opening - Honeywell HON HSV086 Operation & Maintenance Manual

Figure 3: Working principle second stage HON HSVS
2.3 Releasing and opening HON HSV / HON HSVS
(see figures 2 and 3)
After having solved the failure, the pressure to be protected returns to a value
between the lower and higher threshold value. Handle H returns to its initial position.
Due to gravity, balance jaw P follows this movement.
In order to make the HON HSV ready-for-operation again, the switch and reset
mechanism must first be reset and then the second stage (if 16" and larger).
Here follows a short description of the actions for releasing and opening the
HON HSV.
 Solve the failure;
 Bring the pressure to be protected to a normal value between the higher and lower
threshold values;
 Ensure that no gas is taken off at the outlet side and that the pressure above and
below the valve is in equilibrium, using a bypass;
 First press and then turn clockwise handle arm R of the lifting component of the
SVC086;
© 2017 Honeywell International Inc
Operation and maintenance manual HON HSV086 13