Versa-Matic 3 Bolted Metallic Hazardous Service Ball Valve (RE3) - Manual (Page 28)

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• Model RE3 Metallic Bolted
AirVantage Servicing - Check Valve
AirVantage – Check Valve Assembly
To service the check valve, first shut off and bleed the air being
supplied to the pump. For safety purposes the air supply line
should be disconnected from the pump. Then shut off the
suction and discharge lines to the pump. Bleed the pressure
from the pump suction and discharge lines and remove the
lines from the pump. During the servicing of the AirVantage,
consult the “AirVantage Composite Repair Parts Drawing”
(Page 11)
Step #1: Remove the Patch Cable
Twist the ribbed portion of the patch cable connector in
the counterclockwise direction, until it un-threads from the
connector. The cable can be either be removed from the
intermediate or from the control module.
Step #2: Remove the AirVantage from the Pump
Use a ½” socket and remove the four 5/16 x 5 ½ cap screws
that hold the AirVantage to the pump. Remove the two
chamber bolts/nuts that are holding the right side bracket to be
able to remove the right bracket and the AirVantage unit from
the pump. Be sure to support the weight of the AirVantage
while removing the last cap screw. After the AirVantage is
removed from the pump, set the unit down on the plastic cover
located on the bottom. Inspect the o-ring between the poppet
valve and adapter plate for damage.
Step 3: Remove the Check Valve from the Pump
Use a ½” socket and remove the four 5/16 x 2 ½ cap screw
that holds the check valve to the pump.
Step 4: Inspect Check Valve
Using a 1 ¼” open socket wrench, remove the cartridge
valve. Inspect o-rings and mechanism for any signs of wear,
degradation, or damage. If any is present, replace with
new cartridge valve assembly. Remove any remaining fluid
contamination on inside of body and/or cartridge valve. Be
careful not to lose the large and small o-rings on either face of
the check valve body.
Step 5: Re-assembly of Check Valve
Apply a thin layer of white lithium grease to the threads on the
valve cartridge. Insert cartridge valve into body and hand-
tighten being careful not to pinch o-ring. Using a 9” torque
wrench with crow-foot, torque cartridge vale to 250 in-lbs. Re-
apply o-rings, as necessary, to both faces of check valve. After
applying Blue Loctite 248, 222 (or equivalent) secure check
valve back to pump with four 5/16 x 2 ½ cap screws, re-torque
to 90 in-lbs.
To secure the AirVantage, re-install the four 5/16 x 5 ½ cap
screws, torquing to 90 in-lbs. Re-install Patch cable.