Vacuum valves: Edwards® (formely known as BOC Edwards® ) vacuum valves
Edwards® Industrial Quarter Swing Butterfly
Valve Manual and Pneumatic
Edwards® Industrial Quarter Swing Butterfly
Valve Manual and Pneumatic
Suited to industrial vacuum systems
Field proven technology
for vacuum systems
Robust design copes with dirty gas
loads
High conductance and full bore vacuum pumping
Corrosion resistant
Leak tight to greater than 1 x 10-3
mbar | s-1 / 8 x 10-4 Torr | s-1
Use of ASA flange
Integral flange seals
Manual and pneumatic actuation
options
Easily replaced vacuum seals
Built for demanding vacuum applications. The Edwards® QV
industrial butterfly valves are well suited to industrial vacuum installations where
conventional vacuum valves fail through particulate contamination or
corrosive attack
Technical data - Edwards® Industrial Quarter Swing Butterfly
Valve Manual and Pneumatic
Pressure range: 10-2 to 5000
mbar / 8x3-4 to 3750 Torr
Leak rate: >7x10-3 mbar
| s -1/
<8x10-4 Torr | s -1
Construction materials:
Body: Cast iron, nylon II encapsulated
Butterfly disc: 126 stainless steel
Resilient liner: Fluoroelastomer
Average life until first service*:
100000 cycles
Molecular conductance
QVA025: 250 | s-1
QVA040: 680 | s-1
QVA060: 2300 | s-1
Ambient operating temperature range:
-18 to 100°C
Reliability MTTF: 30000 cycles
- Actuators are rack and pinion
opposed-piston units in spring return or double acting options
- Sring return models employ a unique cartridge system
that offer safety, simplicity and compactness
- Manual operation is
also available.
Edwards® Industrial Quarter Swing Butterfly
Valve Manual and Pneumatic - Microswitch position sensors
To control external vacuum process
management and detect the status of the valve, 2 microswitches detect the valve
open/closed status
Technical data - Edwards® Industrial Quarter Swing Butterfly
Valve Manual and Pneumatic - Microswitch position sensors
Enclosure rating: NEMA4, 4X, IP65
Switch contacts: SPDT 15A 120 / 250 V
a.c.
Proximity position sensors
- Providing reliable valve status
sensor duties with solid state inductive devices
- Ideal for
interfacing to computer controlled vacuum installations
- Bounce
free contacts with no moving parts
- Integral LED's for visual
status indication
- Yellow pointer indicates local valve travel
position
Edwards® Industrial Quarter Swing Butterfly
Valve Manual and Pneumatic - Microswitch position sensors
Technical data
|
|
Supply voltage
Supply voltage
Line frequency
Load current
Inrush current
Leakage current
Voltage drop
Output status
Output function
Switching frequency
Temp range
Protection class
|
a.c. Sensor
20-250 V a.c.
40-60 Hz
500mA
0.7A/2 cycled (33 ms)
1.7 mA
6 V
2 LED red
normally open
20 Hz
-25°C - +70°C
IP67
|
d.c. Sensor
1-30 V d.c.
-
200mA
20ựA
1.8V
2 LED red
normally open
1000Hz
-25°C - +70°C
IP67
|
- Selection of pneumatic control solenoids
are available
Edwards® Industrial Quarter Swing Butterfly
Valve Manual and Pneumatic - Microswitch position sensorsDimensions in mm
|
|
|
A
|
B
|
C
|
D
|
E
|
F
|
H
|
J
|
K
|
L
|
|
QVA025
QVA040
QVA060
|
106
154
203
|
46
52
56
|
64
102
146
|
85
131
178
|
152
131
203
|
90
90
90
|
10
11
13
|
32
32
32
|
49
91
138
|
59
87
120
|
G = 20, H=10, J=40,
K=88, L=19, M=59
Edwards® Industrial Quarter Swing Butterfly
Valve Manual and Pneumatic - Microswitch position sensorsLug bolting data
|
|
PCD
No holes
Threads
|
145
4
M16
|
180
8
M16
|
240
8
M20
|
Valve actuation 1 Manual valve 2 Single acting
cylinder spring return 3 Single
acting cylinder spring return with microswitches 4 Single acting
cylinder spring return with a.c. proximity 5 Single acting
cylinder spring return with d.c. Proximity 6 Double acting
cylinder 7 Double acting
cylinder with microswitches 8 Double acting
cylinder with a.c. proximity 9 Double acting
cylinder with d.c. Proximity
|
