File: ADH7002_E 03/2005/eI • 52
1
TAB.1 - PLUGS ARRANGEMENT FOR THE PILOT AND DRAIN LINES
ORDERING CODE
ADH Piloted valve - Pilot valves and
any modulating valves should be
ordered separately
7 CETOP 7/NG16
* Mounting type (see next page)
** Spool type (see next page)
* Piloting and draining
I = X internal / Y internal
IE = X internal / Y external
EI = X external / Y internal
E = X external / Y external
(see Tab.1 at side)
R Check valve incorporated at port P
(Tab. 2) Only for I and IE versions
(omit if not required)
** 00 = No variant
LC = Main spool stroke limiter
2 Serial No.
ADH.7... 4/3 AND 4/2
PILOTED VALVES CETOP 7/NG16
Type ADH.7 distributors are intended for interrupting, inserting and diverting a hydraulic
system flow. Normally these distributors are composed of a main stage, crossed by the circuit
main flow, and of a pilot stage available in several versions.
Various types of controls are available, used either individually or in combination for, among
other functions, stroke limitation and main spool movement speed control, in order to optimize
the hydraulic system operation where this type of valve is employed.
In those cases where normally to drain spools are used, it is necessary to remember that the
minimum changeover pressure due to the opposing springs is equal to approximately 5 bar
(see the operating features table next pages) and it is consequently necessary to specify when
ordering the check valve incorporated in the P line, if required (as shown below).
• Mounting surface in accordance with UNI ISO 4401 - 07 - 06 - 0 - 94 standard (ex CETOP
R 35 H 4.2-4-07).
• Pilot operated spool, solenoid controller.
• Stroke control of main spool.
• Presetting for pressure reducing valve mounting.
• Presetting for single-acting throttle valve mounting.
ADH.7...
STANDARD SPOOLS FOR ADH.7 CH. I PAGE 53
TECH. SPECIFICATIONS ADH.7... CH. I PAGE 54
SUBPLATES BSH.7... CH. I PAGE 55/56
CETOP 3/NG06 CH. I PAGE 8
STANDARD SPOOLS FOR AD.3.E CH. I PAGE 10
AD.3.E... CH. I PAGE 11
ADC.3... CH. I PAGE 5
"A09" DC COILS CH. I PAGE 7
"D15" DC COILS CH. I PAGE 18
"K12" AC SOLENOIDS CH. I PAGE 18
STANDARD CONNECTORS CH. I PAGE 19
ADH.7...I
X internal piloting
Y internal draining
ADH.7...IE
X internal piloting
Y external draining
ADH.7...EI
X external piloting
Y internal draining
ADH.7...E
X external piloting
Y external draining
Plugs type used: M5x5 both for pilot and drain.
Note: standard M6x6 orifice Ø1,5 insert in the P port (Z)
TAB. 2 - INTERNAL CHECK ON P
• For the spools 02-04-14-28 the piloting
is normally external; the internal piloting
is possible only with the internal check
valve (R).
ADH7*.**.*.R.**.2 VERSION
File: ADH7002_E 03/2005/eI • 53
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SPOOLS AND MOUNTING TYPE
ADH.7... 4/3 AND 4/2 PILOTED VALVES CETOP 7/NG16
(•) For the "E mounting" the locating
spring works only with the steady
system
∆p (bar)
Q (l/min)
Spool
Connections
type
P →A P →B A →T B →T P →T
01
ENERGIZING 2 1 3 3
DE-ENERGIZ.
02
ENERGIZING 1 1 3 3
DE-ENERGIZ. 2
03
ENERGIZING 2 1 3 3
DE-ENERGIZ.
04
ENERGIZING 2 2 4 4
DE-ENERGIZ. 5
05
ENERGIZING 1 1 2 2
DE-ENERGIZ. 2 2
66
ENERGIZING 1 1 2 3
DE-ENERGIZ. 4
10
ENERGIZING 2 1 3 3
DE-ENERGIZ.
14
ENERGIZING 1 1 3 3
DE-ENERGIZ. 4
28
ENERGIZING 1 1 3 3
DE-ENERGIZ. 4
23
ENERGIZING 2 1 3 3
DE-ENERGIZ.
The two diagrams show the "Pressure
drops" in relation to spools adopted for
normal usage (see table).
The fluid used was a mineral based oil
with a viscosity of 46 mm
2
/s at 40° C.
4
3
2
1
Pilot
Piloted
Scheme
Spool
type
01
02
03
04*
05
66
10*
14*
28*
23*
C mounting
A mounting
B mounting E mounting (•)
P mounting
AD.3.E.03.C...
ADH.7.C...
AD.3.E.03.E...
ADH.7.A...
AD.3.E.03.F...
ADH.7.B...
AD.3.E.16.E...
ADH.7.E...
AD3E16E/AD3E16F
ADH.7.P...
(* Spools with price increasing)
PRESSURE DROPS
5
Curve No.
∆p (bar)
Q (l/min)
PRESSURE DROPS FOR
INTERNAL CHECK ON P VERSION
Spool
Connections
type
P →A P →B P →T
02 1 1 1
04 1 1 2
Curve No.
2
1
P (bar)
Q (l/min)
LIMIT OF USE
1
2
3
Spool
type
01 1
02 2
03 1
04 3
05 1
66 1
10 1
14 4
28 4
23 1
No.
Curve
4
The limit of use test has been carried
out with external draining and orifice
Ø1,5 insert in the P port (Z). The fluid
used was a mineral based oil with a
viscosity of 46 mm
2
/s at 40° C.
File: ADH7002_E 03/2005/eI • 54
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PILOT SOLENOID CONTROL VALVE SPECIFICATIONS
FOR DIFFERENT CONTROLS, PLEASE CONTACT OUR TECHNICAL ARON SERVICE
ADH.7... 4/3 AND 4/2 PILOTED VALVES CETOP 7/NG16
Max. operating pressure ports P/A/B 350 bar
Max. operating pressure port T (int. drainage) 160 bar
Max. operating pressure port T (ext. drainage) 250 bar
Max. piloting pressure 210 bar
Min. piloting pressure 12 bar
Max flow 300 l/min.
Piloting oil volume for engagement 3 position valves 4 cm
3
Piloting oil volume for engagement 2 position valves 8 cm
3
Hydraulic fluid mineral oil DIN 51524
Fluid viscosity 2.8 ÷ 380 mm
2
/s
Fluid temperature -20°C ÷ 70°C
Ambient temperature -20°C ÷ 50°C
Max. contamination level class 10 in accordance with
NAS 1638 with filter ß
25
≥75
Weight ADH7 without pilot valve 7 Kg
Weight ADH7 with pilot valve with 1 AC solenoid 8,2 Kg
Weight ADH7 with pilot valve with 1 DC solenoid 8,4 Kg
Weight ADH7 with pilot valve with 2 AC solenoids 8,5 Kg
Weight ADH7 with pilot valve with 2 DC solenoids 9 Kg
• Piloted valve fixing:
n° 4 screws T.C.E.I. M10x60 - Tightening torque 40 Nm
n° 2 screws T.C.E.I. M6x55 - Tightening torque 8 Nm
Fixing screws UNI 5931 with material specifications 12.9
• Seals:
n° 4 OR 2-118 PARKER (type 130)
n° 2 OR 2-013 PARKER (type 2043)
SPOOL STROKE ADJUSTMENT
CETOP 7 MOUNTING SURFACE
TEMPI DI RISPOSTA VALVOLA PILOTATA
Switching time
Such values refer to a tests carried out with Aron solenoid
valve type AD3E03 with P = 100 bar pressure and Q = 100
l/min flow. Orifice ø1.5 mm, insert on piloting port, using a
mineral oil at 40°C. with 46 mm
2
/s viscosity.
Solenoids ENERGIZING ±10% (ms) DE-ENERGIZING ±10% (ms)
No. Spool 01 - 03 01 - 03
Scheme 2 positions 3 positions 2 positions 3 positions
AC 50 20 25 30
DC 70 35 40 50
No. Spool 02 04 02 - 04 02 - 04
Scheme 2 posit. 2 posit. 3 posit. 2 positions 3 positions
AC 35 60 30 25 25
DC 55 80 40 40 50
Note: the solenoid valve type ADC.3.E... (with A09 coil) and AD3.E... (with D15
or K12 coils) could be used both as pilote valve, without any changement of
technical features.
1 Piloted solenoid valve type AD3E... or ADC.3.E... CETOP 3/NG6
2 Calibrated diaphragms AD3E...
3 Flow regulation valve type AM3QF..C
4 Pressure reduction valve type AM3RD..C
5 Main valve type ADH7..E
