73
The Concord EPV Series valves are equipped with an adjustable relief valve that, when set,
may be locked and sealed by an inspector. This is also a requirement of most enforcing
authorities. As well, it is recommended that the relief valve should be tested and set, even in
jurisdictions where an inspection is not required.
To set the relief valve, place a full load on the car and run the lift in the UP direction. Read the
pressure gauge as the lift ascends, and mark down the pressure indicated. This is the working
pressure of the lift. The relief must be set to open at a pressure not greater than 125% of the
working pressure. If the indicated pressure was 800 psi, then the maximum relief pressure
permissible by the code is 1000 psi. (800 psi x 125% = 1000 psi)
• Remove the dome top on the relief valve and expose the Allen Head adjusting screw
and lock nut.
• Loosen the lock nut and place a 1/4" Allen wrench in the adjusting screw. Initially,
turn the adjustor screw out at least two full turns.
• Close the main gate valve with the yellow handle.
• Using the temporary buttons, press the UP button and let the motor come up to
speed.
• Continue to allow the motor to run as the adjustment is done. Observe the pressure
reading on the gauge.
• To increase the relief pressure, turn the screw in (clockwise).
• To reduce the relief pressure, turn the screw out (counter-clockwise).
• Turn the adjustor screw in and observe the reaction of the pressure gauge.
• As the adjustor is turned in, the pressure gauge should increase in the indicated
pressure.
• Turn the adjustor until the indicated pressure on the gauge is about 1000 PSI.
• Release the button to stop the motor. Tighten the lock nut. The relief valve is now
set.
• Install the domed cap.
• Note: There is a facility to install a seal, if required by the inspector. The seal may
be threaded through the holes in the domed cap and through the hole provided at
one corner of the body of the valve.
To Next Page
Loading...