Moog D664-4732 Valve

D661-D665
TECHNICAL DATA
Operating Pressure Range Port P, A and B up to 5,000 psi [350 bar] Port T
see data of individual series Temperature Range Ambient Fluid
-4°F to +140°F [-20°C to +60°C] -4°F to +176°F [-20°C to +80°C]
Seal Material
NBR, FPM and others on request
Operating Fluid
mineral oil based hydraulic fluid (DIN 51524, part 1 to 3), other fluids
on request
Viscosity Recommended Allowable
Flow Rate Q [gpm]
PERFORMANCE SPECIFICATIONS FOR STANDARD MODELS
3000 2000
p 0g
100 1000
500
400
System Filtration Pilot stage or pilot valve: high pressure filter (without bypass, but
with dirt alarm) mounted in the main flow and if possible directly upstream of the valve.
Main stage: high pressure filter as for the pilot stage. In combination with a fast regulating VD-pump, a bypass filter is
possible.
Class of Cleanliness The cleanliness of the hydraulic fluid greatly effects the
performance (spool positioning, high resolution) and wear (metering edges, pressure gain, leakage) of the valve.
Recommended Cleanliness Class For normal operation: ISO 4406 < 16/13 For longer life:
ISO 4406 < 14/11
gp
26
100
50
10
gp
m[
in]
l/m
0 l/
100
[ pm 5g
145
15 to 45 mm 2/s 5 to 400 mm 2/s
0 150 m[
in]
m
l/m 550 n] /mi
0l [35 in] pm g l/m 92 250 [ pm 66 g in] l/m 150 [ gpm 40 in] l/m [80 in]
m gp l/m 21 [60 pm g 6 1 in] l/m [30 m p 8g
in]
685
37 m[
85
95
gp
25 m[
gp
14 m[
gp
90 m[
20
375 238 170 100
gp
D665
l/m
in]
D664
] min ] min
D663
in]
D662
5 l/
gpm
5 [37
D665
in]
l/m
0 l/
64 m[
in]
l/m
l/m
in] l/m 205 n] [ i gpm 50 l/m 54 [1 m gp 40 in] l/m [80 m p g 21
D662
D661 D661
D661
5 150 500 1000 3000 5000 Rated Pressure Drop ∆pN = 150 psi Valve Pressure Drop ∆p [psi]
[10 bar]
Valve Flow Diagram Valve flow for maximum valve opening (100% command signal) as a
function of the valve pressure drop
Filter Rating recommended For normal operation: ß15 ≥ 75 (15 µm absolute)
For longer life:
ß10 ≥ 75 (10 µm absolute) Installation Options Vibration
any position, fixed or movable 30 g, 3 axes
Degree of Protection
EN60529 class IP 65, with mating connector mounted
Shipping Plate
Delivered with an oil sealed shipping plate under the mounting surface.
VALVE FLOW CALCULATIONS A valve’s flow is dependent upon its electrical command signal
and valve pressure drop. The flow for a given valve pressure drop can be calculated using the square root function for sharp edged
orifices as follows:
Q = QN ∆p ∆pN Q [gpm] = calculated flow
QN [gpm] = rated flow ∆p [psi] = actual valve pressure drop ∆pN [psi] = rated valve pressure drop
If large flow rates with high valve pressure drop are required, an appropriate higher pilot pressure has to be selected in order to
overcome the flow forces. An approximate value can be calculated as follows:
Q -2
PX ≥ 3.8 • 10 • — • ∆p AK Q [gpm] = max. flow ∆p [psi] = valve pressure drop with Q
AK [in2] = spool drive area
PX [psi] = pilot pressure The pilot pressure pX has to be at least 215 psi above the return
pressure of the pilot stage.
Moog • D660 Series
5