MOOG D633-308B Valve

TECHNICAL DATA
Moog Direct Drive Servo Valves D633 and D634 Series
SIZE 03 - D633
General Technical Data Valve design
1 stage, with spool and bushing
Mounting pattern
ISO 4401-03-03-0-05 (with or without leakage oil connection Y)
Installation position
Any
Weight
2.5 kg (5.51 lb)
Storage temperature range
-40 to +80 °C (-40 to +176 °F)
Ambient temperature range
-20 to +60 °C (-4 to +140 °F)
Vibration resistance
30 g, 3 axis
Shock resistance
50 g, 6 directions, 3 ms
MTTFd value according to EN ISO 13849-1
150 years
Hydraulic Data Maximum operating pressure Port P, A, B
350 bar (5,000 psi)
Port T without Y
50 bar (725 psi)
Port T with Y
350 bar (5,000 psi)
Port Y
Depressurized to tank 2)
Rated flow at ΔpN 35 bar (500 psi) per spool land
5 l/min (1.3 gpm)
10 l/min (2.6 gpm)
20 l/min (5.3 gpm)
40 l/min (10.6 gpm)
0.6 l/min (0.16 gpm)
1.2 l/min (0.32 gpm)
Maximum flow
75 l/min (19.8 gpm)
Leakage flow (rate) (≈ zero lap), typical 1)
0.15 l/min (0.04 gpm)
Hydraulic fluid
Hydraulic oil as per DIN 52524 parts 1 to 3 and ISO 11158. Other fluids upon request.
Temperature range
0.3 l/min (0.08 gpm)
-20 to +80 °C (-4 to +176 °F)
Viscosity range at 38 °C (100 °F) Recommended)
15 to 100 mm2/s (cSt)
Maximum permissible
5 to 400 mm2/s (cSt)
Recommended cleanliness class according to ISO 4406 For functional safety
18/15/12
For longer service life
17/14/11
1) Measured at 140 bar (2,000 psi) system pressure, oil viscosity 32 mm2/s and oil temperature 40 °C (104 °F).
2) In order to avoid an emptying of the return line, a back-pressure of 2 bar (29 psi) should be maintained on the T and Y connections.
Typical Static and Dynamic Data 1) Step response time for 0 to 100 % stroke
≤ 12 ms
Threshold, typical
0.05 %
Threshold, maximum
< 0.1 %
Hysteresis, typical
0.1 %
Hysteresis, maximum
< 0.2 %
Null shift at ΔT = 55 K (131 °F)
< 1.5 %
Sample deviation of rated flow
< 10 %
1) Measured at 140 bar (2,000 psi) system pressure, oil viscosity 32 mm2/s and oil temperature 40 °C (104 °F).
Rev. D, November 2024
7