SMC Networks VFS Series Manual page 6

VFS
Series
Caution
Maintenance
qA lot of carbon powder and oil waste from air
sources (mostly from compressor) entering into
the valve sometimes can lead to increased slid-
ing resistance at the switching spool and cause
valve malfunction. In the worst case, spool can
adhere to the valve. Therefore supply air should
be kept clean.
Also please note that if pressurized states on
SUP is left for a long time with inferior air quality,
carbon powder and oil waste in the compressed
air accumulate in the clearance of spool and the
sleeve, and can cause the spool to adhere to the
valve. The remedy for this case is to check the
compressor lubrication oil and find out the least
oxidizing compressor lubrication oil.
Meanwhile, a high filtration Mist Separator
(Series AM) installed on the back of regular filter
(Series AF) can prevent foreign particles from
entering into the valve.
wIn case foreign matter from the air source
adheres to spool and sleeve, disassemble the
adapter plate section and end plate section
(return spring insert section).
Then, take out spool and sleeve from valve and
clean them with trichlene or freon solutions,
when cleaning, prevent O rings from touching
cleaning solutions.
eWhen disassembling and re-assembling,
please ensure that all components are in proper
positions. Prevent gaskets from slipping, and
clamp bolts down equally. Use torques listed
below when mounting pilot valves and solenoid
valve bodies.
Pilot valve assembly
Set screw Correct clamping torque (Nm)
M3 4.5 to 6
Solenoid valve body
Set screw Correct clamping torque (Nm)
M3 8 to 12
M4 14 to 25
M5 28 to 50
How to Calculate Flow Rate
See p.0-36 for calculating flow rate.
1.17-6
Interface Regulator Specifications
(1)
Model
Applicable solenoid valve series
Regulation
Proof pressure
Max. operating pressure
Set pressure range
Ambient and fluid temperature
Gauge connecting port
Weight (kg)
Effective area of the supply side (mm
S at P =0.7MPa, P =0.5MPa
1 2
Effective area of the exhaust side (mm
S at P =0.5MPa
2
Note 1) Set within the operating pressure range of solenoid valve.
Note 2) Synthesized effective area with solenoid valve 2 position single style.
Note 3) •To supply air to Interface Regulator P port is the only supply port except for when used with a
reverse pressure valve.
•To combine a pressure center valve and the A and B port pressure reduction of a spacer style
regulator, use the ARBF3000, 4000, or 5000 model.
•To combine a reverse pressure valve and a spacer style regulator, use the ARBF3000, 4000, or
5000 model. The P port pressure reduction cannot be used.
•To combine a double check valve and interface regulator, use the manifold or the sub-plate as a
reference, and stack them in the order of the double check spacer, the interface regulator and the
valve.
•A closed centre valve cannot be used combined with an interface regulator for applications of
cylinder intermediate stops as there is leakage from the relief port of the interface regulator.
Flow Characteristics (P→A)
JIS Symbols
P port regulation
A port regulation
ARBF3050-00-P
ARBF4050-00-P
ARBF5050-00-P
ARBF2000 ARBF3050
VFS2000 VFS3000
P A
M5
0.16 0.46
2 (3) P A 5.5 21
)
P B 5.1 18.5
2 (3) A EA 12
)
B EB 11
(Conditions: Supply pressure 0.7MPa.
When 2 position solenoid valve is mounted.)
ARBF2000-00-P
B port regulation
ARBF3050-00-A
ARBF4050-00-A
ARBF5050-00-A
ARBF4050 ARBF5050
VFS4000 VFS5000
B P A B P A B
1.5MPa
1.0MPa
(2)
0.1 to 0.83MPa
o
5 to 60 C
1/8
0.72 0.83
18.5 11 35 31 26 44 38
22 12 31 31 24 38 40
40 55 90
36 45 77
P
32
31