Part Number: 2A33687
Release Date: 8/27/2015
Revision: B
48
Setting and Adjusting Pressure:
The EXL Back Pressure Relief Valve is direct acting. The pressure set on the nitrogen regulator is directly
related to the relief pressure. The higher the nitrogen pressure, the higher the relief set point. Use the following
procedure to obtain the correct set point. A few attempts at working pressure may be required to confirm the
set point.
Refer to Setting Guide for Calibration Procedure (Page 11)
WARNING: BLEED OFF ALL PRESSURE FROM SYSTEM. TRAPPED AIR WILL BECOME
ENERGIZED AND MAY CAUSE INJURY TO PERSONNEL WHEN THE VALVE RELIEVES.
ERV Stand Assembly:
Weir provides an ERV Stand Assembly (2A41384) for easier installation and removal of the Relief Valve on a
Fracturing location. As shown in the illustration below, it is recommended that an isolation valve and a 90
degree elbow be used when setting up the Relief Valve.
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