601247EB (2018-01) 1
HV Angle Valve
pneumatically operated
bellows sealed
with position indicator
21624-K...-....
21628-K...-....
21632-K...-....
HV Inline Valve
pneumatically operated
bellows sealed
with position indicator
21624-K...-....
21628-K...-....
21632-K...-....
Operating Manual
2
601247EB (2018-01)
Product Identification
In all communications with VAT, please specify the information
on the product nameplate. For convenient reference copy that
information into the space provided below:
Inline Valve
Stainless steel housing
Angle Valve
Aluminum housing Angle Valve
Stainless steel housing
Inline Valve
Aluminum housing
made in Switzerland
Fabrication No.:
.....-....-..../....
A-......
made in Switzerland
Fabrication No.:
.....-....-..../....
A-......
601247EB (2018-01)
3
Validity
This document applies to products with the following part num-
bers:
Angle valves …
… with pilot valve, normally closed (n.c.)
• Aluminum housing
DN 16
ISO-KF
21624-KA41-
DN 25
ISO-KF
21628-KA41-
DN 40
ISO-KF
21632-KA41-
Nominal voltage or
voltage range
(pilot valve)
000. 000. 000. 24 VDC
AAM. AAM. AAM. 24 VAC
AAK. AAK. AAK. 100 … 115 VAC
AAL. AAL. AAL. 200 … 230 VAC
• Stainless steel housing
DN 16
ISO-KF
21624-KE41-
DN 25
ISO-KF
21628-KE41-
DN 40
ISO-KF
21632-KE41-
Nominal voltage or
voltage range
(pilot valve)
000. 000. 000. 24 VDC
AAM. AAM. AAM. 24 VAC
AAK. AAK. AAK. 100 … 115 VAC
AAL. AAL. AAL. 200 … 230 VAC
… with pilot valve, normally open (n.o.)
• Aluminum housing
DN 16
ISO-KF
21624-KA41-
DN 25
ISO-KF
21628-KA41-
DN 40
ISO-KF
21632-KA41-
Nominal voltage
(pilot valve)
ACV. ACV. ACV. 24 VDC
• Stainless steel housing
DN 16
ISO-KF
21624-KE41-
DN 25
ISO-KF
21628-KE41-
DN 40
ISO-KF
21632-KE41-
Nominal voltage
(pilot valve)
ACV. ACV. ACV. 24 VDC
4
601247EB (2018-01)
… without pilot valve
• Aluminum housing
DN 16 ISO-KF
21624-KA21-
DN 25 ISO-KF
21628-KA21-
DN 40 ISO-KF
21632-KA21-
000. 000. 000.
• Stainless steel housing
DN 16 ISO-KF
21624-KE21-
DN 25 ISO-KF
21628-KE21-
DN 40 ISO-KF
21632-KE21-
000. 000. 000.
Inline Valve …
… with pilot valve, normally closed (n.c.)
• Aluminum housing
DN 16
ISO-KF
21624-KA41-
DN 25
ISO-KF
21628-KA41-
DN 40
ISO-KF
21632-KA41-
Nominal voltage or
voltage range
(pilot valve)
AAB. AAB. AAB. 24 VDC
AAP. AAP. AAP. 24 VAC
AAN. AAN. AAN. 100 … 115 VAC
AAO. AAO. AAO. 200 … 230 VAC
• Stainless steel housing
DN 16
ISO-KF
21624-KE41-
DN 25
ISO-KF
21628-KE41-
DN 40
ISO-KF
21632-KE41-
Nominal voltage or
voltage range
(pilot valve)
AAB. AAB. AAB. 24 VDC
AAP. AAP. AAP. 24 VAC
AAN. AAN. AAN. 100 … 115 VAC
AAO. AAO. AAO. 200 … 230 VAC
601247EB (2018-01)
5
… with pilot valve, normally open (n.o.)
• Aluminum housing
DN 16
ISO-KF
21624-KA42-
DN 25
ISO-KF
21628-KA42-
DN 40
ISO-KF
21632-KA42-
Nominal voltage
(pilot valve)
AAB. AAB. AAB. 24 VDC
• Stainless steel housing
DN 16
ISO-KF
21624-KE42-
DN 25
ISO-KF
21628-KE42-
DN 40
ISO-KF
21632-KE42-
Nominal voltage
(pilot valve)
AAB. AAB. AAB. 24 VDC
… without pilot valve
• Aluminum housing
DN 16 ISO-KF
21624-KA21-
DN 25 ISO-KF
21628-KA21-
DN 40 ISO-KF
21632-KA21-
AAB. AAB. AAB.
• Stainless steel housing
DN 16 ISO-KF
21624-KE21-
DN 25 ISO-KF
21628-KE21-
DN 40 ISO-KF
21632-KE21-
AAB. AAB. AAB.
The part number (PN) can be taken from the product nameplate.
If not indicated otherwise in the legends, the illustrations in this
document correspond to the valve with part number 21628-
KA41-000.. They apply to the other valves by analogy.
We reserve the right to make technical changes without prior
notice.
All dimensions are indicated in mm.
Intended Use
The angle valves are used as shut-off and venting devices for
vacuum applications.
6
601247EB (2018-01)
Scope of Delivery
• 1× Valve
• 1× Female cable connector
• 1× Instant push-in fitting
• 1× Operating Manual German
• 1× Operating Manual English
Contents
Product Identification 2
Validity 3
Intended Use 5
Scope of Delivery 6
1
Functional Principle 8
1.1
Valve with Pilot Valve, Normally Closed 8
1.2
Valve with Pilot Valve, Normally Open 10
1.3
Valve without Pilot Valve 12
2
Safety 14
2.1
Symbols Used 14
2.2
Personnel Qualifications 14
2.3
General Safety Instructions 15
2.4
Liability and Warranty 15
3
Technical Data 16
4
Installation 21
4.1
Vacuum Connection 21
4.2
Compressed Air Connection 23
4.3
Power Connection 26
601247EB (2018-01)
7
5
Operation 31
5.1
Valve with Pilot Valve, Normally Closed 31
5.2
Valve with Pilot Valve, Normally Open 32
5.3
Valve without Pilot Valve 32
6
Deinstallation 33
6.1
Power Connection 33
6.2
Compressed Air Connection 35
6.3
Vacuum Connections 37
7
Maintenance / Repair 39
7.1
Cleaning / Replacing Bellows and Seals 40
7.2
Replacing the Cover 43
8
Spare Parts 45
9
Accessories 46
10
Returning the Product 47
11
Disposal 48
For cross references within this document, the symbol (→ XY)
is used.
8
601247EB (2018-01)
1 Functional Principle
1.1 Valve with Pilot Valve, Normally Closed
Opening action
When the pilot valve is activated, the angle valve is opened by
the pneumatic actuator. The visual position indicator becomes
visible and the electrical position indicator "valve open" is acti-
vated.
Pneumatic actuator
for opening the valve
Position indicator
"valve open"
activated
Position indicator
visible
Pilot valve
activated
601247EB (2018-01)
9
Closing action
When the pilot valve is deactivated, the angle valve is closed by
the pressure spring. The visual position indicator is no longer
visible and the electrical position indicator "valve closed" is acti-
vated.
Pilot valve
not activated
Bellows sealing
the valve
Position indicator
"valve closed"
activated
Pressure spring
for closing the
valve
Position indicator
invisible
Pneumatic
actuator
10
601247EB (2018-01)
1.2 Valve with Pilot Valve, Normally Open
Opening action
When the pilot valve is deactivated, the angle valve is opened by
the pneumatic actuator. The position indicator becomes visible
and the electrical position indicator "valve open" is activated.
Pneumatic actuator
for opening the valve
Position indicator
"valve open"
activated
Position indicator
visible
Pilot valve
not activated
601247EB (2018-01)
11
Closing action
When the pilot valve is activated, the angle valve is closed by the
pressure spring. The position indicator is invisible and the elec-
trical position indicator "valve closed" is activated.
Pilot valve
activated
Bellows sealing
the valve
Position indicator
"valve closed"
activated
Pressure spring
for closing the
valve
Position indicator
invisible
Pneumatic
actuator
12
601247EB (2018-01)
1.3 Valve without Pilot Valve
Opening action
When compressed air is admitted, the angle valve opens. The
visual position indicator becomes visible and the electrical
position indicator "valve open" is activated.
Compressed air
Pneumatic actuator
for opening the valve
Position indicator
"valve open"
activated
Position indicator
visible
601247EB (2018-01)
13
Closing action
When no compressed air is admitted, the angle valve is closed
by the pressure spring. The visual position indicator is no longer
visible and the electrical position indicator "valve closed" is acti-
vated.
Position indicator
"valve closed"
activated
Pressure spring
for closing the
valve
Position indicator
invisible
Pneumatic
actuator
Compressed air
Bellows sealing
the valve
14
601247EB (2018-01)
2 Safety
2.1 Symbols Used
DANGER
Information on preventing any kind of physical injury.
WARNING
Information on preventing extensive equipment and environ-
mental damage.
Caution
Information on correct handling or use. Disregard can lead to
malfunctions or minor equipment damage.
2.2 Personnel Qualifications
Skilled personnel
All work described in this document may only be carried out by
persons who have suitable technical training and the neces-
sary experience or who have been instructed by the end-user
of the product.
601247EB (2018-01)
15
2.3 General Safety Instructions
• Adhere to the applicable regulations and take the necessary
precautions for the process media used.
Consider possible reactions between the materials (→ 18)
and the process media.
• Adhere to the applicable regulations and take the necessary
precautions for all work you are going to do and consider the
safety instructions in this document.
• Before beginning to work, find out whether any vacuum com-
ponents are contaminated. Adhere to the relevant regulations
and take the necessary precautions when handling contamin-
ated parts.
Communicate the safety instructions to all other users.
2.4 Liability and Warranty
VAT assumes no liability and the warranty becomes null and
void if the end-user or third parties
• disregard the information in this document
• use the product in a non-conforming manner
• make any kind of interventions (modifications, alterations etc.)
on the product
• use the product with accessories not listed in the product
documentation.
The end-user assumes the responsibility in conjunction with the
process media used.
Failures due to contamination or wear and tear, as well as ex-
pendable parts (e.g. seals), are not covered by the warranty.
16
601247EB (2018-01)
3 Technical Data
Pilot valve
Nominal voltage
Power
DC voltage
AC voltage
Duty cycle
Nominal diameter
→ product nameplate
2.5 W
4.8 / 3.6 VA
100%
1.2 mm
Electrical position indi-
cator
Connection
Rating
soldered joints
250 VAC / 25 VA / 0.1 A
50 VDC / 12.5 W / 0.25 A
Vacuum connection DN 16
ISO-KF DN 25
ISO-KF DN 40
ISO-KF
Actuation opening: pneumatic
closing: by pressure spring
Compressed air supply
Tube connection
Pressure range
Purity classes
ø4 mm, ø6 mm or ø¼"
4 … 8 bar (overpressure)
2 4 1 (ISO 8573-1)
Piston displacement 4 cm
3
11 cm
3
35 cm
3
Stroke of valve plate 6 mm 8 mm 13 mm
Conductance
1)
Angle valve
Inline valve
5 l/s
2.5 l/s
14 l/s
7 l/s
45 l/s
20 l/s
Switching frequency
2)
100 / min 100 / min 75 / min
Opening time
3)
100 ms 120 ms 260 ms
Closing time
4)
100 ms 160 ms 540 ms
1)
For air with molecular flow.
2)
With pressure difference ∆p=0 and compressed air = 5 bar (over-
pressure).
3)
With compressed air = 4 bar (overpressure) and vacuum in the
valve.
601247EB (2018-01)
17
Cycle life
5)
10 million
Tightness 1×10-9 mbar l/s
Pressure max. 5 bar (absolute)
Operating pressure min. 1×10-8 mbar
Operating pressure max. 2 bar
Pressure difference ∆p
In closing direction
In opening direction
5 bar
2 bar
Temperature
Ambiance
Bakeout
Housing
Aluminum
Stainless steel
Actuator
Pilot valve
0 °C … +50 °C
80 °C
150 °C
50 °C
50 °C
Use altitude up to 2500 m NN
Type of protection IP 50
Protection class II
Mounting orientation any
Flow direction
6)
any
4)
With compressed = 8 bar (overpressure) and atmosphere in the
valve.
5)
Cycles without expendable parts (seals) and under clean operating
conditions.
If the valve is operated under harsh or dirty conditions, it should be
cleaned / maintained before the specified service time to mainte-
nance has been reached.
6)
Recommended mounting orientation: valve seat toward vacuum
chamber.
18
601247EB (2018-01)
Materials
Housing
Aluminum
Stainless steel
Bellows / valve plate
Pressure spring
Seals
Cover
Visual position indi-
cator
Cylinder unit
Protective lid
Packing material
EN AW-6060
1.4301
1.4404 / 1.4435
spring steel
FPM
ABS
POM
EN AW-6060
PE
carton box, PE
Weight
Angle valve
Aluminum
Stainless steel
0.49 kg
0.52 kg
0.68 kg
0.75 kg
1.21 kg
1.33 kg
Inline valve
Aluminum
Stainless steel
0.56 kg
0.89 kg
0.78 kg
1.35 kg
1.41 kg
2.2 kg
601247EB (2018-01)
19
Dimensions [mm]
• Angle valve
DN
DN
ø4
enclosed
Visual position indicator Valve seat site
Compressed air connection Flow direction
Position indicator connection Protective lid
Electrical connection
Aluminum housing
DN A B C D E F G
DN 16 ISO-KF 142 112.9
75.1 55 51.4
93.2
40
DN 25 ISO-KF 146.9
117.8
79 64.3
60.1
97.8
50
DN 40 ISO-KF 188.8
159.7
114.9
81.3
75.7
105.3
65
Stainless steel housing
DN A B C D E F G
DN 16 ISO-KF 144.5
115.4
77.6 55 51.4
93.2
40
DN 25 ISO-KF 150.3
121.2
82.5 64.3
60.1
97.8
50
DN 40 ISO-KF 191.8
162.7
117.9
81.3
75.7
105.3
65
20
601247EB (2018-01)
• Inline valve
DN
DN
ø4
enclosed
Visual position indicator Valve seat site
Compressed air connection Flow direction
Position indicator connection Protective lid
Electrical connection
Aluminum housing
DN A B C D E F G H
DN 16 ISO-KF
133.1
104 66.2
18.7
80
55 51.4
93.2
DN 25 ISO-KF
137.6
108.5
69.7
25 100
64.3
60.1
97.8
DN 40 ISO-KF
177.1
148 103.2
30 130
81.3
75.7
105.3
Stainless steel housing
DN A B C D E F G H
DN 16 ISO-KF
126.1
97 59.2
20 80 55 51.4
93.2
DN 25 ISO-KF
133.6
104.5
65.7
31.8
100
64.3
60.1
97.8
DN 40 ISO-KF
169.1
140 95.2
40.8
130
81.3
75.7
105.3
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