Δp curves vs. flow in “A-B” free flow direction
As seen on the diagram, the cracking pressure is very low.
Sleeve for Line Mounting - Directional Control Valves - Check
VULN-FF
Performance
Advantages
- Very compact design and inline mounting for space saving.
- Mounting position is unrestricted.
- Four sizes provide great adaptability to the system.
Description
Description
This valve is composed by a sleeve with an inserted ball type check cartridge.
Flow is always allowed to pass from A to B when pressure at A rises above the spring bias pressure and the ball is pushed from the seat. The valve is normally closed (checked) from B to A.
The inserted cartridge can be reached from either port in order to be screwed-in or screwed-out with an Allen type key 3-4-5-6-8 mm, depending from the cartridge size, and from the port used.
Technical data
VULN Code
Ports A-B
Pressure P max bar (psi)
Flow Q max l/min (gpm)
Weight kg (lbs)
0T.U4.01.00.09.00
G 1/4
210 (3000)
15 (4)
0.02 (0.04)
0T.U4.01.00.02.00
G 3/8
210 (3000)
30 (8)
0.03 (0.07)
0T.U4.01.00.03.00
G 1/2
210 (3000)
50 (13)
0.04 (0.09)
0T.U4.01.00.04.00
G 3/4
210 (3000)
80 (21)
0.07 (0.15)
Steel body, zinc plated
Dimensions
Z
CRACKING PRESSURE bar (psi)
G 1/4
G 3/8
G 1/2
G 3/4
00
2.3 (33.4)
1.75 (25.4)
1.75 (25.4)
0.3 (4.4)
Ordering code
Ports size / Dimensions
Y
Ports A-B
L mm (inches)
Hex mm (inches)
Sleeve code
09
G 1/4
48 (1.89)
19 (0.75)
OC.51.02.001
02
G 3/8
52 (2.05)
22 (0.87)
OC.51.02.002
03
G 1/2
62 (2.44)
27 (1.06)
OC.51.02.003
04
G 3/4
70 (2.76)
36 (1.42)
OC.51.02.004
