EN
77-1889-R15 (3/2021)
3 / 4
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BINKS STAINLESS STEEL BACK PRESSURE FLUID VALVES, MODELS 84-404 & 84-504
INSTRUCTIONS
INSTALLATION:
1. When installing back pressure valve assembly,
make certain that ARROW underneath valve
body points toward DOWNSTREAM side of
system.
2. Make certain that inlet and outlet connections are
tight.
3. If valve is installed in other than the upright
(vertical) position, make certain that the gauge
assembly (6) is in the upright position in all
cases. The gauge assembly may be installed in
either of the 1/4 NPT outlets.
OPERATION:
1. With system in operation, turn handle (10) in a
clockwise direction until desired back pressure or
flow rate is obtained. To reduce back pressure,
reverse procedure.
2. Tighten nut (1) to maintain desired back
pressure.
NOTE
HIGHER back pressure REDUCES flow rate.
LOWER back pressure INCREASES flow rate.
3. If back pressure valve buzzes during or after
initial startup of system, the presence of air in
the system is indicated. If buzzing continues for
any duration, reduce back pressure until buzzing
ceases. Then readjust to desired back pressure.
MAINTENANCE:
1. Back pressure valve can be serviced without
removing the valve from the line.
2. To replace diaphragms, gaskets or seats:
a. Turn handle (10) in a counter-clockwise
direction until tension from spring (14) is
relieved.
b. Remove screws (2).
c.
Remove valve (13).
3. To reassemble, reverse procedure as outlined.
When reassembling, note sequence of
diaphragms and gaskets. The gasket (15)
fits between the diaphragms (8) and (16).
The diaphragms are located below the other
gasket (19). See detailed insets on diagram on
page 1.
MODEL INLET & OUTLET FLOW COEFFICIENT
84-404
3/4 NPT(f)
CV = 2.0 MAX.
84-504 1
1
⁄
4
NPT(f)
CV = 2.0 MAX.