File: AM3$D004_E 01/2000/eIV • 12
4
P (bar)
Q (l/min)
AM.3.RD.A
AM.3.RD.P
AM.3.SD.P
3
2
1
Pr (bar)
Q (l/min)
3
2
1
Relieving ←
AM.3.RD... /AM.3.SD... MODULAR PRESSURE
REDUCING
/ PRESSURE SEQUENCING VALVES CETOP 3
Max. operating pressure: port P 350 bar
Max. pressure adjustable 250 bar
Setting ranges: spring 1 2 ÷ 30 bar
spring 2 10 ÷ 120 bar
spring 3 60 ÷ 250 bar
Max. flow 40 l/min
Internal drainage RD:
Positive overlap version 0,5 l/min
Negative overlap version 2 l/min
Hydraulic fluids Mineral oils DIN 51524
Fluid viscosity 10 ÷ 500 mm
2
/s
Fluid temperature -25°C ÷ 75°C
Ambient temperature -25°C ÷ 60°C
Max. contamination level class 10 in accordance
with NAS 1638 with filter ß
25
≥75
Weight 1,3 Kg
AM3RD and AM3SD valves are direct
acting spool type pressure reducing
and sequencing units, respectively,
with one end pre-loaded by means of
a spring an the other end exposed to
the hydraulic pressure.
The drainage is drained within the
valve to port T. Pressure is adjustable
by means of a screw and locknut, or of
a handwheel. Three types of springs
allow adjustment within the range
2÷250 bar. The pressure reducing
valves are available in two versions:
with positive overlap (suitable with
low flow rate) and with negative over-
lap to obtain a greater pressure rein-
statement speed.
PRESSURE - FLOW RATE
AM3SD
AM Modular valve
3 CETOP 3/NG6
** RD = Direct pressure reducing valve
SD = Direct pressure sequencing valve
* Control on lines
AM.3.RD version = A / P
AM.3.SD version = P
* 1 = Positive overlap
2 = Negative overlap
Omit for version AM3SD
* Type of adjustment
C = Grub screw
V = Handwheel
* Setting ranges
1 = max. 2 ÷ 30 bar (white spring)
2 = max. 10 ÷ 120 bar (yellow spring)
3 = max. 60 ÷ 250 bar (green spring)
** 00 = No variant
V1 = Viton
4 Serial No.
Application
example
ORDERING CODE
PRESSURE - FLOW RATE
AM3RD
The fluid used is a mineral based oil with a viscosity of 46 mm
2
/sec at 40 degrees C.
The tests have been carried out at with a fluid temperature of 40 degrees C.
HYDRAULIC SYMBOLS
OVERALL DIMENSIONS
Type of adjustment
V Handwheel
C Grub screw
Support plane
specifications
AM.3.RD / AM.3.SD...
SCREWS AND STUDS CH. IV PAGE 21
