File: ADH8001_E 05/2009/eI • 57
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TAB.1 - PLUGS ARRANGEMENT FOR THE PILOT AND DRAIN LINES
ORDERING CODE
ADH.8...4/3
AND 4/2
PILOTED VALVES CETOP 8/NG25
ADH Piloted valve
(Pilot valves and any
modulating valves should be
ordered separately)
8 CETOP 8/NG25
* 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
- setting 5 bar (Tab. 2 below)
Only for I, IE versions
(Omit if not required)
** 00 = No variant
LC = Main spool stroke limiter
TA = High pressure (•)
(Up to 420bar on P/A/B ports)
1 Serial No.
ADH.8...IE
X internal piloting
Y external draining
ADH.8...E
X external piloting
Y external draining
ADH.8...I
X internal piloting
Y internal draining
ADH.8...EI
X external piloting
Y internal draining
Plugs type used: M6x6 both for pilot and drain
• Mounting surface in accordance with UNI ISO 4401 - 08 - 07 - 0 - 94 standard (ex CETOP
R 35 H 4.2-4-08).
• Pilot operated spool, solenoid controller.
• Stroke control of main spool.
• Presetting for pressure reducing valve mounting.
• Presetting for single-acting throttle valve mounting.
Type ADH.8 distributors are intended for interrupting, inserting and diverting a hydraulics
system flow.
Normally these distributors are composed of a main stage, crossed by 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).
ADH.8...
STANDARD SPOOLS FOR ADH.8 CH. I PAGE 58
TECH. SPECIFICATIONS ADH.8... CH. I PAGE 59
SUBPLATES BSH.7... CH. I PAGE 60
CETOP 3/NG06 CH. I PAGE 8
STANDARD SPOOLS FOR AD.3.E CH. I PAGE 10
AD.3.E... CH. I PAGE 11
"D15" DC COILS CH. I PAGE 18
"K12" AC SOLENOIDS CH. I PAGE 18
STANDARD CONNECTORS CH. I PAGE 19
(•) For heavy applications, eg. concrete pumps
TAB. 2 - INTERNAL CHECK ON P
• For the spools 02-04-14-28 the piloting is
normally external; the internal piloting is
possible with the internal check valve (R).
File: BSH8001_E 05/2009/eI • 58
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∆p (bar)
5 4 6 3
1
2
Q (l/min)
ADH.8... 4/3 AND 4/2 PILOTED VALVES CETOP 8/NG25
PRESSURE DROPS
Spool
Connections
type P →A P →B A →T B →T P →T
01 ENERGIZING 1 1 2 3
02
DE-ENERGIZ.
2 2 1 2 6(
1
)
ENERGIZING
03
DE-ENERGIZ.
1 1
4(
2
) 4(
3
)
ENERGIZING 1 2
04
DE-ENERGIZ.
6 6 3 4 5
ENERGIZING
05
DE-ENERGIZ. 4(
2
) 4(
3
)
2 3
ENERGIZING 2 2
66
DE-ENERGIZ.
1 1 2
4
ENERGIZING 2
10 1 1 2 3
ENERGIZING
14
DE-ENERGIZ.
6 6 3 4 5(
3
)
ENERGIZING
28
DE-ENERGIZ.
6 6 4 3 5(
2
)
ENERGIZING
23
DE-ENERGIZ.
1
4
2 3
ENERGIZING 2
Curve No.
Notes: (
1
) A/B stopped - (
2
) B stopped - (
3
) A stopped
C mounting
A mounting
B mounting E mounting
P mounting
The diagram shows the pressure drops in
relation to spools adopted for normal us-
age (see table).
The fluid used was a mineral based oil with
a viscosity of 35 mm
2
/s at 50° C.
SPOOLS AND MOUNTING TYPE
(•) For the E mounting the locating spring works
only with the steady system
(* Spools with price increasing)
Pilot
Piloted
Scheme
Spool
type
01
02
03
04*
05
66
10*
14*
28*
23*
AD.3.E.03.C...
ADH.8.C...
AD.3.E.03.E...
ADH.8.A...
AD.3.E.03.F...
ADH.8.B...
AD.3.E.16.E...
ADH.8.E...
AD3E16E/AD3E16F
ADH.8.P...
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CETOP 8 MOUNTING SURFACEOVERALL DIMENSIONS
PILOT SOLENOID CONTROL VALVE SPECIFICATIONS
FOR DIFFERENT CONTROLS, PLEASE CONTACT OUR TECHNICAL ARON SERVICE
1 Piloted solenoid valve type AD3E... 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
• Piloted valve fixing: n° 6 screws T.C.E.I. M12x60
• Tightening torque: 69 Nm
• Seals: n° 4 OR 2-123 PARKER (type 3118)
n° 2 OR 2-117 PARKER (type 3081)
SWITCHING TIMES PILOTED VALVE
ENERGIZING ±10% (ms) DE-ENERGIZING ±10% (ms)
Solenoids 2 posit. 3 posit. 2 posit. 3 posit.
AC
60 45 90 60
DC 75 55 90 60
ADH.8... 4/3 AND 4/2 PILOTED VALVES CETOP 8/NG25
SPOOL STROKE ADJUSTMENT
Max. operating pressure ports P/A/B 320 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 5 bar
Max. flow with 04-14-28 spools 500 l/min a 210 bar
450 l/min a 320 bar
Max. flow with all other spools 600 l/min a 210 bar
500 l/min a 320 bar
Piloting oil volume for engagement 3 position valves 11.1 cm
3
Piloting oil volume for engagement 2 position valves 22.12 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 ADH8 without pilot valve 13,1 Kg
Weight ADH8 with pilot valve with 1 AC solenoid 14,3 Kg
Weight ADH8 with pilot valve with 1 DC solenoid 14,5 Kg
Weight ADH8 with pilot valve with 2 AC solenoids 14,6 Kg
Weight ADH8 with pilot valve with 2 DC solenoids 15,1 Kg
Switching time
Such values refer to a solenoid valve with P = 100 bar
pressure using a mineral oil at 50°C with 36 mm
2
/sec
viscosity PA and BT connections.
File: BSH8001_E 00/2000/eI • 60
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BSH.8.13* WITH P, T AND A, B REAR 1"1/4 BSP OR 1" 1/2 BSP
BSH.8.15 WITH T, P AND A, B SIDE 1" BSP
BSH.8.17 WITH P AND T REAR, A AND B SIDE 1" BSP, X AND Y REAR
BSH.8.13 WITH P, T AND A, B REAR 1" BSP
BSH.8...
SUBPLATES MOUNTING FOR ADH.8 TYPE PILOTED VALVES CETOP 8/NG25
BSH Single plate
for piloted valve
8 CETOP 8/NG25
13 1" BSP rear connectors
00 No variant
1 Serial No.
BSH Single plate
for piloted valve
8 CETOP 8/NG25
15 1" BSP side connectors
00 No variant
1 Serial No.
Weight: 6,3 Kg - Fixing screws M10x60 UNI 5931
Weight: 8,2 Kg
Fixing screws M10x75 UNI 5931
Weight: 8,3 Kg - Fixing screws M10x75 UNI 5931
BSH
Single plate
for piloted valve
8 CETOP 8/NG25
17 1" BSP rear and
side connectors
00 No variant
1 Serial No.
BSH Single plate
for piloted valve
8 CETOP 8/NG25
13* A = 1"1/4 BSP rear connectors
B = 1"1/2 BSP rear connectors
00 No variant
1 Serial No.
Weight: 21,7 Kg (BSH.8.13A) - Weight: 21,2 Kg (BSH.8.13B)
Fixing screws M12x100 UNI 5931
