CETOP 03
3
3
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0045
DESCRIPTION
ORDERING CODE
Stackable pressure reducing valve direct operated. The valve is made
with a steel body combined with a pressure relief valve integrtaed in the
body.The body of the valve is phosphate coated. The cartridge valve is
zinc coated.
The pressure can be set in different pressure ranges.
1
2
PRESSURE REDUCING VALVES
AM3-RO-*
60 l/min - 32 MPa (320 bar)
(1)
AM3 -
(3)
/
(4)
-
/
(6)
10
(1) AM3: stackable valve CETOP 03 - Pressure 32 MPa (320 bar)
(2) RO: pressure reducing,direct operated- 3 way valve
(3) Service lines where the controls operate:
P: control on P with 3
a
way and drain to T line
A: control on A with 3
a
way and drain to T line
B: control on B with 3
a
way and drain to T line
(4) Pressure adjustment ranges:
3,2 : from 0,3 to 3,5 MPa (from 3 to 35 bar)
6,3: from 1 to 7 MPa (from 10 to 70 bar)
12,5: from 3 to 14 MPa (from 30 to 140 bar)
25: from 6 to 28 MPa (from 60 to 280 bar)
(5) Code reserved for more options and variants
M= adjustment hand knob
(6) Design number (progressive) of the valves
-
(2)
RO
(5)
All valves AM3-RO-* are 3 way, direct operated: If the pressure in the regulated
chamber overcomes the value of the adjusted, reduced pressure, the valve
discharges to T (at pressure value higher then the reduced pressure- see diagrams)
thus acting as safety or relief valve.
5,1
15,5
25,9
31
31,75
32,5
0,75
12,7
21,5
30,2
33
40,5
4
M5
7,5 MAX.
51 min.
43 min.
T
A
B
P
ISO 4401-03
V1-17
3
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0046
TECHNICAL DATA
TYPICAL DIAGRAMS
3
4
Maximum rec. flow rate on free lines 1d m
3
/s (60 l/min) Adjustment of the relief pressure:
on controlled lines 0,66 dn3/s (40 l/min) Reduced pressure is obtained by throtting the flow on spool which is balanced, on one
side, by the reduced pressure and, on the other side by the positioning spring. The value
of the reduced pressure is changed by changing the compression of spring. To increase
the value of the reduced pressure, turn clockwise the handknob or screw 3 by acting
on ex. CH17 mm, after having unlocked ist nut. when the required level of pressure is
reached, lock the nut.
For each pressure adjustment range, the pressure gradient is approx:
3,2: 0,7 MPa/turn (7 bar/turn)
6,3: 1,4 MPa/turn (14 bar/turn)
12,5: 2,5 MPa/turn (25 bar/turn)
25: 5 MPa/turn (50 bar/turn)
Maximum nominal pressure 32 MPa (320 bar)
Maximum pressure on T 10 MPa (100 bar)
Max drain <1,2 cm
3
/s
(0,07 l/min)
Pressure curves see
Installation and dimensions see
Masses
AM3-MP-BA approx 2,3 kg
INSTALLATION DIMENSIONS (mm)
5
6
4
Typical curves for valves AM3-RO in standard configuration,
with mineral oil at 36 cSt and at 50°C
All stackable valves AM3-RO-* conform with ISO and CETOP specifications for mounting
surface dimensions and for valves height 40 mm. Leakage between valve and mounting
surface is prevented by the positive compression on their seats of 4 seals type OR 2037.
20
40
20
4x6
7,5
C Hex 27
C Hex 36
C Hex 17
C Hex 17
47,8
C Hex 6
0,75
5,1
15,5
25,9
31
12,7
21,5
30,2 7,5
3x6
N°4
5,5
6,75 32,5 6,75
46
14,2
40,5 25,8
80,5 96,75 16,25
193,5
OR 2037
5
pressure (bar)
Flow Q (l/min)
40 30 20 10 0 10 20 30 40
160
120
80
40
320
280
240
200
HYDRAULIC FLUIDS
Seals and materials used on standard valves AM3-*
are fully
coMPatible with hydraulic fluids of mineral
oil base, upgraded with
antifoaming and antioxidizing agents.
The hydraulic fluid must be kept
clean and filtered to ISO 406 class 19/17/14, or better, and used in a
recom ended viscosity range from 10 cSt to 60 cSt.
V1-17
