EVR – Vacuum Series -
Precision Back Pressure Regulator
EVR-Series Installation and Operating Instructions
1
1/12/12
These instructions apply to all Equilibar model EVR regulators
with the 20 turn set point adjuster installed by the factory. The
EVR consists of a dome-loaded back pressure regulator (on
bottom) with a set-point regulator on top. The body is stamped
with an ”I” for inlet which should be connected to the process
to be controlled. The “O” (outlet) is to be connected to lines
from the vacuum source (or pump).
A typical installation will have a schematic similar to that
shown at the right. (Note: The line to the 20 turn adjustment
comes integrated) You may wish to mount the 20 turn
adjustment in another location. Instrument grade plastic
tubing can be used to pipe the source vacuum for this change.
Installation Notes
•
Use a strainer to protect the inlet of the Equilibar if
debris is expected in your vacuum process.
•
Inlet and Outlet ports are stamped “I” and “O” as
shown.
•
Connect your vacuum pump or supply to the “O”
port.
•
Connect the “I” port to your process needing
pressure control.
Take precautions to prevent injury to personnel in the event
of a diaphragm failure or external leak. Sensitive fluid
controls can experience external or internal leaks.
Maintenance Notes
•
Maintain strainer or filter upstream of device
•
Annual inspection of diaphragm integrity is recommended, especially for applications where there
is strong or regular pulsing (i.e. reciprocating pump, etc.).
Trouble Shooting:
Problem
Possible solutions
•
Cannot achieved desired vacuum levels
•
Adjust 20 turn knob
•
Check for inlet and outlet reversed; change installation if
necessary
•
Look for obstructions in vacuum supply lines
•
Vacuum pumps may need maintenance
•
No control over vacuum level
•
Diaphragm may ruptured; check and replace if necessary
•
Debris in regulator; Disassemble and clean unit
•
20 turn adjuster may have been damaged; check and replace
if necessary
•
Hissing noise comes from regulator
•
Leaks in control line to 20 turn adjuster; replace tubing
Inlet
Exhaust
I
