
OPTIONS
Pilot and Drain Options
This drawing shows the location of the
orifice for the standard internal pilot
configuration, and the plug for standard
external drain on solenoid and air
piloted models.
For conversion to external pilot (XP),
replace orifice with solid setscrew,
10-24 UNC x 0.25 inch (6.4) long,
(Dynex part 1059.027).
For conversion to Internal Drain
(ID), remove plug (as shown in
Section B-B illustration).
Spool Stroke Adjustment
(SSA OPTION)
The main stage spool travel can be
limited by using a stroke adjustment.
These are available on one or both ends.
When the stroke is limited, maximum
flow through the valve is reduced
(assuming same inlet pressure). To
adjust, loosen the jam nut and turn
adjusting screw. Once adjustment is
achieved, re-tighten jam nut.
The drawing shows an end cover with
“1SSA” option on the standard port “A”
end of valve. The “2SSA” configuration,
with adjustments on both ends, is
shown printed in gray.
For single adjustment on port “B” end,
contact the Dynex Sales department.
1SSA option adds 0.4 lb (0,18).
2SSA option adds 0.8 lb (0,36).
Flow Control (Pilot Choke)
(CH OPTION)
A pilot choke increases the amount of
time it takes to shift the main valve from
one position to another.
It is designed to allow free flow to one
end of the main stage spool but restricts
flow out of the opposite end.
9.92
(252)
1.81 (46,0) MAXIMUM
1.37 (34,8) MINIMUM
JAM NUT
ADJUSTMENT SCREW
1.81 (46,0) MAXIMUM
1.37 (34,8) MINIMUM
1.70
(43,2)
7.79
(197,9)
FLOW CONTROL (PILOT CHOKE)
SPOOL STROKE
ADJUSTMENT
MAIN VALVE
SOLENOID A
MAIN VALVE
SOLENOID B
2X SAE #4 A & B
GAGE PORTS
(PLUGGED)
Optional Spool Stroke Adjustment and Flow Control
The rate of spool travel in either
direction can be slowed by loosening
a locknut and turning an adjusting
screw clockwise. To increase the rate of
spool travel, turn the adjusting screws
counterclockwise.
When a pilot choke is used, pilot
pressure should be taken from a
constant pressure source.
The pilot choke is mounted between
the pilot valve and the main valve.
CH option adds 3.1 lb (1.4 kg).
Maximum Pressure:
3000 psi (210 bar).
Consult Dynex Sales department for
pressures above 3000 psi (210 bar).
8
PP
A
B
T
X
X
B
B
P T
SECTION B-B
SECTION X-X
PLUG FOR EXTERNAL DRAIN
(STANDARD), REMOVE
FOR INTERNAL DRAIN
ORIFICE FOR INTERNAL
PILOT (STANDARD), PLUG
FOR EXTERNAL PILOT OPTION
REMOVE PLUG FOR ACCESS
TO EXTERNAL DRAIN PLUG
Pilot and Drain Conversion Solenoid and Air Piloted Models