Spool
valves provide consistent and
accurate control of pressure, regardless
of flow variations.
The hydraulically balanced spool is
controlled by an integral pilot
valve.
With a narrow differential between
cracking pressure and full flow, these
valves are ideal for systems requiring
constant actuator force.
Some models are available with integral
reverse free-flow check
valves.
SPECIFICATIONS
Mounting
8800 Series, Line Connected;
P8800 Series, Subplate Mounted;
F8800 Series, Pattern for Standard
S.A.E. 1-1/2 inch Flange
(Size 10 Only)
Rated Flow
Size 03:
Nominal, 15 U.S. gpm (57 L/min);
Maximum, 20 U.S. gpm (76 L/min)
Size 06:
Nominal, 40 U.S. gpm (151 L/min);
Maximum, 60 U.S. gpm (227 L/min)
Size 10:
Nominal, 90 U.S. gpm (341 L/min);
Maximum, 150 U.S. gpm (568 L/min)
Rated Pressure
Standard:
3000 psi (210 bar)
HP Option:
5000 psi (350 bar); See model
code on page 6 for availability.
Pressure Adjustment
Standard Pressure Range:
100 to 3000 psi (7 to 210 bar)
HP Option:
100 to 5000 psi (7 to 350 bar)
LP Option:
50 to 1000 psi (4 to 70 bar)
LLP Option:
40 to 500 psi (3 to 35 bar)
Pressure is manually set by turning
the maximum pressure adjustment
(knurled knob or optional handwheel).
Turning clockwise increases pressure.
The setting is held by a locknut.
Electric Vent Option
Size 10 models are available with an
electric vent option (normally-open,
EVO; or normally-closed, EVC).
Pressure is automatically controlled
by an integral Dynex D03
valve.
APPLICATION NOTES
Mounting
Orientation: Unrestricted for all models.
Subplate Models: Port o-rings are
included. Bolts must be ordered separately;
.375-16 U.N.C.–2B Threaded x
4.00 inches (101,6 mm). Recommended
torque is 23 lb•ft (31,2 N•m). Size 03
and 06 models require four bolts; Size
10 models require six.
Standard Seals
Fluorocarbon (Viton® or Fluorel®)
Fluid Recommendations
Viscosity:
50 to 1500 SUS (7 to 325 cSt)
Temperature Range:
-20° to +200° F (-29° to +93° C)
Filtration
Use filtration to provide fluid which
meets ISO cleanliness level 19/17/14
(ISO Code 4406) or cleaner. Adequate
filtration is especially critical for sliding
spool
valves held in one position
for long periods, subject to system
pressure. Silting may cause spool
valves to stick and not properly shift.
Valves should be cycled periodically.
Pressure Surges
Consistent with standard practice,
the system should be protected
from pressure surges, which can
affect the shifting of any spool
valve.
In systems with multiple
valves, a
separate line to tank, or to another
low pressure line, is recommended.
8800 Series Balanced Spool 90 U.S. gpm (341 L/min) nominal;
Pressure Control Valves Standard 3000 psi (210 bar),
HP Option 5000 psi (350 bar)
P8800 Series
Subplate Mounted
8800 Series
LIne Connected
Standard 9 34 90 6,2
03
20 76 90 6,2
LP 9 34 30 2,1
20 76 35 2,4
Standard 27 102 90 6,2
06
60 227 90 6,2
LP 27 102 30 2,1
60 207 75 5,2
Standard 55 208 90 6,2
10
150 568 90 6,2
LP 55 208 30 2,1
150 568 90 6,2
Size
U.S.gpm L/min psi bar
Pressure Flow Vented ÄP
Range
PRESSURE DROP (ÄP)
High Pressure Hydraulics DYNEX ENGINEERING
SPECIFICATIONS
