JATCO Environmental Tank
Service Guide
J-
7000
200
ABV
*INSTRUMENTATION GAS IS MANDATORY FOR SUPPLY GAS*
Listed below are a series of steps to follow if the JATCO tank fails to dump properly.
Be sure there is an adequate supply of volume and gas pressure (
7
0-100 psi), to the inlet
connection on the micro valve
(
C
)
, and (200
psi
max
) to the 3-way ball valve supply
(
J
)
. If there is
enough pressure at the supply connections, press down on the manual dump plunger
(F)
. This
should cause the tank to manually dump, then vent through
(H)
when the cycle is complete. If the
JATCO tank fails to dump manually, remove pilot signal connector tubing to 3-way ball valve’s
actuator
(G)
to test for pilot signal from 3-way micro valve
(
D
)
. If the 3-way micro valve is not
sending a pilot signal to the actuator when depressing manual dump plunger, removal and or
inspection of micro valve will be necessary and proceed to next step. If pilot signal pressure is
present but actuator fails to operate, usually the pilot signal will escape from the actuator vent
orifice. This indicates O-ring failure in the actuator and replacement may be necessary. The
actuator does have a repair kit mainly consisting of O-rings.
*Note: 2” valve body (Bull plug) does not need to be removed to change out micro valve.
To remove the micro valve, remove the top vent tube connector and the bottom gas supply
connector to allow access and removal of the two hex socket cap screws. Remove the cap screws
and the micro valve from the valve body. Inspect the inlet port to see if any obstruction has lodged
in the orifice which could clog the micro valve. If no obstruction is visible, apply gas pressure to
the inlet port and operate the toggle spring. Flipping the toggle up should allow gas to flow out
center ¼” NPT port. If operating the toggle does not allow gas to flow, the micro valve must be
replaced.
To re-install the micro valve and mounting plate assembly on the 2” valve body, flip the toggle to
the down position and insert toggle spring through the center hole in the valve body. Reinstall the
two mounting cap screws, the vent connector, and the gas supply connectors. Check system by
pushing down manual dump plunger.
To remove the 2” valve body: Remove micro valve as previously described. Remove manual dump
plunger. Loosen hex nut top dead center of 2” valve body and tap down pivot pin to separate from
valve body. This allows the float arm assembly to swivel freely while turning valve body out of
tank.
Make sure that pivot pin does not move with 2” valve body
. Remove float assembly
carefully to avoid bending the float arm.
To install valve body, insert float arm into the tank with the float toward the gauge cock end of the
tank. Hold the float pivot pin with a screwdriver, keeping the slot on the top of the pivot pin
positioned 90° (perpendicular) to the float arm. Tighten the 2” valve body into the tank,
positioning the machined surface toward the gauge cock end of the tank, while holding the float
pivot with a screwdriver; tighten the hex nut to lock the float arm in place. Re-install manual dump
plunger and depress it while observing the trip lever through the toggle orifice on valve body for
alignment. The trip lever should be visible and centered. Re-install gasket and micro valve.
244 NW 111th • Oklahoma City, Ok. 73114 • 405/755-4100 • 405/755-4101 Fax
