98
MATERIALS
Body 9 S Mn Pb 28 - UNI 5105
Needle 1C 40 - UNI 8373
OR Nitrile
Antiextrusion ring PTFE
Knob GD - Al Si 12 - UNI 5706
Knob (mp) ABS
FT 268/2 - UNF
EXAMPLE FOR ORDERING
Code Type Viton seal
Knob
in plastc
Steel FT 268/2 34 V mp
SEAL KIT ON THE SEATING
Type 1(OR) 2(BK)
34 2037 266/6.022.00.1-34
78 2050 267/2.022.00.1-38
DIMENSIONS
Type
ØA
UNI 4534
ØB C D E ØF G H L CH (3)
34 3/4”-16 UNF 12,7 11 17 28 27 67 95 7 22 2068
78 7/8”-14 UNF 15,9 11,7 20,8 32,5 33 80 112,5 10 27 3075
99
TECHNICAL DATA
Type
flow
section cm
2
Max. working
pressure bar
Min. bursting
pressure bar
Working
temperature °C
Filtration grade
µm absolute
34 0,10 320 1300 -20°/+100° 25
78 320 320 1300 -20°/+100° 25
FLOW RATE Q
20
15
10
5
0
PRESSURE DROP ∆p
FT 268/2 - 34
bar
l/min
Oil 3,2°E ÷ 50°C
20
8060
100 120 140 16040 180
FLOW RATE Q
35
30
25
20
15
10
5
0
PRESSURE DROP ∆p
FT 268/2 - 78
bar
l/min
Oil 3,2°E ÷ 50°C
20
8060
100 120 140 16040 180
CARTRIDGE MOUNTED PRESSURE COMPENSATED
TWO-WAY LOW FRICTION CONTROL VALVES MAX 350 BAR
Pressure compensated flow control valves, to insert in modular units in line.
The construction and functional characteristics reflect exactly those described
for the two inlet valves.
It is recommended to keep them in their protective wrapping until
the mounting, in order to avoid possible drawbacks caused by eventual
entry of particles into the delicate and essential parts for a good working.
On page 100 is proposed a machining scheme for the embedding seat,
which has to be observed to ensure the necessary accuracy of the valve.
On request
• Viton seals (V)
• Knob in ABS (mp)
FT 268/2 - UNF
100
FT 265/2 - FT 266/2 FT 266/5 - FT 266/6 - FT 268/2
Sealing realized
with OR seals
on conical seating
101
FT 265/2 - 266/2 - 266/5 - 266/6 - 268/2
DRAWING OF CAVITY MACHINE FOR CARTRIDGE
MOUNTED VALVES
CONICAL SEATING FOR OR FT 265/2 - FT 266/2 FT 266/5 - FT266/6 - 268/2
Type M N P Q R S T
α
°
OR
34 0,5 14,3 19,05
±0,13
1,53
±0,08
0,1
+0,15
-0
29
±0,4
29,8 70° 2068
78 0,5 15,75 24,45
±0,1
1,4
±0,1
0,1
+0,15
-0
33,75
±0,4
34,5 60° 3075
CONICAL SEATING FOR OR FT 265/2 - FT 266/2 FT 266/5 - FT266/6 - 268/2
Type ØA ØB
C
UNI 4534
D E F G ØH ØL
34 32
±0,4
20,65
±0,1 3/4”
-16UNF-2B 2,75 9,5 18,9 28,6 11,7
12,7
+0,05
-0
78 32
±0,4
24
±0,1 7/8”
-14UNF-2B 2,75 12,35 24,25 31,85 15
15,875
+0,05
-0
