Festo VZXA-***-M Series, Instructions For Use

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Angle seat valve with diaphragm actuator
VZXA-...-M
Festo AG & Co. KG
Postfach
73726 Esslingen
Germany
+49 711 347-0
www.festo.com
Instructions for use 8065302
1609
[8065305]
Original: de
Angle seat valve with diaphragm actuator VZXA-...-M English . . . . . . . . . . . . . . . .
1 About this document
This document describes the use of the above-mentioned product. Certain aspects
of use are described in other documents and must be observed
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Applicable documents.
1.1 Applicable documents
All available documents for the product
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www.festo.com/pk
1.2 Product labelling
Scanning the printed Data Matrix Code with an appropriate device calls up the
Festo Support Portal, with information appropriate for the product. Alternatively,
the product key (11-digit alphanumeric code or product label) can be entered in
the search field of the Support Portal.
2 Safety
2.1 Intended use
The angle seat valve VZXA-...-M is intended to shut-off gaseous or liquid media in
piping systems.
To control liquid media, use only the product variant VZXA-B... (media flow under
valve seat).
2.2 General safety information
The product may only be used in its original status without unauthorized modi­
fications.
Observe all applicable national and international regulations.
Use the valve only in the flow direction indicated.
Only use the product if it is in perfect technical condition.
Take into consideration the ambient conditions at the location of use.
Media
Only use media in accordance with specifications
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Technical data.
Use only media that will not cause dangerous reactions if mixed.
Do not operate the product with chemically unstable gases, abrasive media
or solid materials.
If water is used: up to approx. 1000 ppm of chloride content is permitted.
Avoid tensile stresses.
If aggressive media are used: limit medium temperature to 65 °C.
Actuator
Do not open the actuator (pressure in the actuator or loaded spring).
Avoid mechanical stresses on the valve. Do not use the actuator as a lever.
Return to Festo
Hazardous substances can endanger the health and safety of personnel and cause
damage to the environment. To prevent hazards, the product should only be re­
turned upon explicit request by Festo.
Consult your regional Festo contact.
Complete the declaration of contamination and attach it to the outside of the
packaging.
Comply with all legal requirements for handling hazardous substances and
transporting dangerous goods.
3 Further information
– Accessories
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www.festo.com/catalogue
– Spare parts
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www.festo.com/spareparts
– Documents and literature
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www.festo.com/sp
4 Service
Contact the regional Festo contact if you have technical questions
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www.festo.com.
5 Product overview
5.1 Design
1
2
3
4
5
6
7
8
9
5
1
Position indicator (
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Fig. 4)
2
Pneumatic connection (2)
3
Actuator housing
4
Leakage hole
5
Pipe connection;
Feed or forwarding (corresponding
to flow direction)
6
Arrow for direction of flow
7
Valve housing
8
Actuator interface / angle seat
valve with spanner flat
9
Pneumatic connection (4)
Fig. 1
5.2 Product variants and type code
Fig. 2 explains selected product characteristics that are necessary
to understand the instructions.
Description of the complete type code:
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www.festo.com/catalogue
Characteristic Value Description
Type VZXA Angle seat valve
Medium flow A Over valve seat - closing in the direction of medium flow
(for gaseous media)
B Under valve seat - closing against the direction of media
flow (for gaseous and fluid media)
Connection type T Threaded collar
Temperature
of medium M2 –10…+180 °C
Medium pressure 4 to 30 0…4 bar to 0…30 bar
Actuator M Diaphragm actuator
Actuator size 90 90 mm
Control function Closed via spring force, NC
S Opened via spring force, NO
PR Closed via reduced spring force, NC
Fig. 2
5.3 Function
The angle seat valve VZXA-...-M is an externally controlled 2/2-directional control
valve with diaphragm actuator. The valve seat is slanted around 40° toward the
medium flow.
To close the valve, the valve actuator using the actuator rod presses the valve disc
into the valve seat in a force fit.
The supply of the operating medium is controlled by an external valve (usually
electrically controlled) that must be additionally integrated into the supply line for
the actuator.
The actuator can be rotated 360° on the valve housing.