File: AD3I001_E 03/2000/eI • 41
1
Q (l/min)
∆p (bar)
B
→ →
→ →
→ T
P
→ →
→ →
→ B
P
→ →
→ →
→ A
A
→ →
→ →
→ T
OVERALL DIMENSIONS
These automatic reciprocating
valves, with interface UNI ISO 4401
- 03 - 02 - 0 - 94 standard (ex CETOP
R 35 H 4.2-4-03), reverse the move-
ment of an actuator every time the
flow through the valve stops.
With no max. pressure valves inside
the body, the spool is moved by two
springs and locked by unbalanced
pressure inside valve; when no more
flow is crossing the valve, the spool
changes the position inverting the
direction of the actuator.
With a preferential starting P → B
and A → T position, these valves are
mainly used to control the move-
ment compactors or system where is
not possible to use electrical device.
ORDERING CODE
AD Directional valve
3 CETOP 3/NG6
I Automatic reciprocating
valve at null flow
P Version with positioner to
adjust the pressure relief valve
of the system
** 00 = No variant
V1 = Viton
1 Serial No.
AD.3.I... AUTOMATIC RECIPROCATING
VALVES
CETOP 3
Tests carried out with mineral oil at a tem-
perature of 40°C with viscosity of 46 mm
2
/s.
HYDRAULIC SYMBOL
Max. operating pressure port P 320 bar
Max. flow 30 l/min
Minimum permitted flow 3 l/min
Fluid viscosity 20 ÷ 200 mm
2
/s
Fluid temperature -20°C ÷ 60°C
Max. contamination level(*) class 10 in accordance
with NAS 1638 with filter ß
25
≥75
Positioner activating force 130 N
(measured with 1 bar on the T line)
Weight of version without positioner 0,95 Kg
Weight of version with positioner 1 Kg
(*) Max contamination level must be respect to obtain
the right function of the valve
PRESSURE DROPS
Support plane
specifications
Fixing screws UNI 5931 M5x40
with material specifications min. 8.8
Tightening torque 5 Nm / 0.5 Kgm
AD.3.I...
