MOOG D634-537A Valve

GENERAL TECHNICAL DATA, SYMBOLS
Operating pressure range Ports P, A and B Port T Temperature range Ambient
Seal material Operating fluid
Viscosity
up to 350 bar (5000 psi) up to 210 bar (3000 psi)
–20 °C to +60 °C (-4 °F to +140 °F) –20 °C to +80 °C (-4 °F to +170 °F) FPM, others upon request
mineral oil based hydraulic fluid (DIN 51524, part 1 to 3), others upon request
recommended 15 to 100 mm2/s (cSt) allowed 5 to 400 mm2/s (cSt)
System filtration High pressure filter (without bypass, but with dirt alarm) mounted in the main flow and if possible, directly upstream of the
valve.
Class of cleanliness The cleanliness of the hydraulic fluid particularly effects the
performance (spool positioning, high resolution) and wear (metering edges, pressure gain, leakage) of the proportional
valve.
Recommended cleanliness class For normal operation
ISO 4406 < 15 / 12 For longer life (wear)
ISO 4406 < 14 / 11 Filter rating recommended For normal operation ß10 ≥ 75 (10 µm absolute)
For longer life (wear) ß6 ≥ 75 ( 6 µm absolute) Installation options any position,
fixed or movable Vibration 30 g, 3 axes Degree of protection EN60529: Class IP 65 with
mating connector mounted Shipping plate Delivered with an oil sealed shipping plate
A
B
P T T2
Y
4-way version spring centered
Flow control (throttle valve) in port A and port B Port Y required if pressure pT > 50 bar (715 psi) in port T
for 3-way function close port A or port B of the manifold Spools with ~ axis cut or 10 % overlap available
2X2-WAY FUNCTION
A
Y
B
P T T2 M764
Fluid
4-WAY FUNCTION
M761
PERFORMANCE SPECIFICATIONS FOR STANDARD MODELS
D634-P
2x2-way version (Y-Port required)
Flow control (throttle valve) in port A Port Y required Connect externally port P with port B, and port A with
port T
The actual valve flow is dependent on the spool position and the pressure drop across the spool lands.
At 100% command signal (i.e. +10 VDC = 100% valve opening), the valve flow at rated pressure drop ∆pN = 35 bar (500 psi) per
metering land is the rated flow QN. For other than rated pressure drop, the valve flow changes at constant command signal
according to the square root function for sharp edged orifices.
Q / l/min
QN / l/min ∆p / bar ∆pN / bar
= = = =
calculated flow rated flow actual valve pressure drop rated valve pressure drop
The actual valve flow Q calculated in this way, should result in an average flow velocity in ports P, A, B or T of less than 30 m/s.
4
Moog • D634-P Series
Flow rate Q / l/min
VALVE FLOW CALCULATIONS powe r limita tion
300 200 150
)
100 80 60
n
i l/m
.9 (15
gpm
gpm 0.6 1 ( in l/m ) pm 40 .3 g 6 ( in l/m 24 60
40 30 20 15 10
20 30 50 70 100 200 300 Valve pressure drop ∆p / bar
--- recommended flow rate limit Q = 180l/min (47 gpm)