|
direction
control valves
Direction
Control Valves are used for operating air / power cylinders. It
is a prerequisite to identify the correct type of valve suitable
to the relevant application. A detailed description of the types
of valves and their application is illustrated below:
1)
SPOOL TYPE: SERIES 11
2)
DIRECT ACTING TYPE: SERIES 12
3)
POPPET TYPE: SERIES 16
SPOOL
TYPE VALVES (SERIES 11)
The
movement by the piston in the cylinder is achieved by the
alternate flow of compressed air guided by the position of the
spool in the valve. The position of the spool is governed by
external means of actuation which could be manual or electrical.
Selection
of spool valve is based on the following criteria:
1)
FORWARD OPERATING MECHANISM OF SPOOL
2)
RETURN OPERATING MECHANISM OF SPOOL
3)
NUMBER OF PORTS
4)
NUMBER OF POSITIONS
5)
PORT SIZE
|
1)
FORWARD OPERATING MECHANISM OF SPOOL |
2)
RETURN OPERATING MECHANISM OF SPOOL |
|
ACTUATION |
TYPES |
ACTUATION |
TYPES |
|
MANUAL |
Hand
Lever / Foot Pedal / Palm |
MANUAL |
Hand
Lever / Foot Pedal / Palm |
|
SOLENOID
COIL |
6
to 220 V D.C. 6 to 400 V A.C. |
SOLENOID
COIL |
6
to 220 V D.C. 6 to 400 V A.C. |
|
PILOT
AIR |
External |
PILOT
AIR |
External |
|
MECHANICAL |
Roller
/ Roller Lever |
MECHANICAL |
Roller
/ Roller Lever |
|
No.
of Ports |
Types |
PP:
Pressure port (pressure line in) |
4)
NUMBER OF POSITIONS: (a) Two position, (b)
Three position
5)
PORT SIZE: Indicates the size of the
ports of the valve to which pipe fittings are made.
Where it is required to have higher flow rate, it is
taken as a rough assumption that the larger the port
size, higher is the flow rate leading to increase in
linear speed of cylinder. "LUTHRA" make offers
port valve sizes ranging from 1/8" B.S.P. to
3/4" B.S.P. |
|
2
Ports |
1
PP / 1 OP |
OP:
Outlet port |
|
3
Ports |
1
PP / 1 CP / 1 EP |
EP:
Exhaust port |
|
5
Ports |
1
PP / 2 CP / 2 EP |
CP:
Compressor port |
| SERIES
11: SPOOL OPERATED VALVES |
|
GENERAL
VALVE CHARACTERISTICS |
HANDLEVER
OPERATED:
|
|
BODY |
ALUMINIUM
HARD ANODIZED |
|
SPOOL |
ENB
HARD CHROME PLATED |
|
SEALS |
NITRILE
/ VITON |
|
TEMPERATURE |
-10
TO 80 / -10 TO 250 DEG. CEN. |
|
PORT
SIZE |
1/4",
3/8", 1/2" B. S. P. |
|
MEDIA |
AIR
/ FLUID * |
|
PRESSURE
RANGE |
AS
PER TYPE OF VALVE |
|
*:
fluid media application valid for all spool valves except
for 3 port & 5 port solenoid operated valves |
| FOOT
OPERATED VALVE |
PALM
BUTTON OPERATED |
|
|
|
TYPE |
SIZE |
A |
B |
C |
D |
|
1)
5/2 Spring return |
1/4" |
134 |
25 |
50 |
214 |
|
3/8" |
216 |
38 |
68 |
320 |
|
1/2" |
216 |
38 |
68 |
320 |
|
4)
3/2 Spring return |
1/4" |
110 |
25 |
50 |
190 |
|
3/8" |
176 |
38 |
68 |
280 |
|
1/2" |
176 |
38 |
68 |
280 |
|
Pressure range |
0
to 10 bar |
|
TYPE |
SIZE |
A |
B |
C |
D |
|
1)
5/2 Spring return |
1/4" |
175 |
25 |
50 |
15 |
|
3/8" |
255 |
38 |
68 |
15 |
|
1/2" |
255 |
38 |
68 |
15 |
|
2)
5/2 Detent type |
1/4" |
170 |
25 |
50 |
15 |
|
3/8" |
250 |
38 |
68 |
15 |
|
1/2" |
250 |
38 |
68 |
15 |
|
4)
3/2 Spring return |
1/4" |
150 |
25 |
50 |
15 |
|
3/8" |
215 |
38 |
68 |
15 |
|
1/2" |
215 |
38 |
68 |
15 |
|
5)
3/2 detent |
1/4" |
155 |
25 |
50 |
15 |
|
3/8" |
220 |
38 |
68 |
15 |
|
1/2" |
220 |
38 |
68 |
15 |
|
TYPE |
SIZE |
A |
B |
C |
D |
|
1)
5/2 Spring return |
1/4" |
134 |
25 |
50 |
120 |
|
3/8" |
216 |
38 |
68 |
150 |
|
1/2" |
216 |
38 |
68 |
150 |
|
2)
5/2 Detent type |
1/4" |
138 |
25 |
50 |
120 |
|
3/8" |
209 |
38 |
68 |
150 |
|
1/2" |
209 |
38 |
68 |
150 |
|
3)
5/3 Detent |
1/4" |
138 |
25 |
50 |
120 |
|
3/8" |
209 |
38 |
68 |
150 |
|
1/2" |
209 |
38 |
68 |
150 |
|
4)
3/2 Spring return |
1/4" |
109 |
25 |
50 |
120 |
|
3/8" |
175 |
38 |
68 |
150 |
|
1/2" |
175 |
38 |
68 |
150 |
|
5)
3/2 Detent |
1/4" |
1131 |
25 |
50 |
120 |
|
3/8" |
179 |
38 |
68 |
150 |
|
1/2" |
179 |
38 |
68 |
150 |
|
6)
3/3 detent |
1/4" |
113 |
25 |
50 |
120 |
|
3/8" |
179 |
38 |
68 |
150 |
|
1/2" |
179 |
38 |
68 |
150 |
|
Pressure range |
2 to 10
bar |
|
