Festo VZQA-C-M22C-6-GG-V2V4E-2, Instructions & Operating

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Translation of the original instructions
1 About this document
This document describes the use of the above-mentioned product.
1.1 Further applicable documents
All available documents for the product
è
www.festo.com/pk.
2 Safety
2.1 General safety instructions
– Only use the product in original status without unauthorised modifications.
– Only use the product if it is in perfect technical condition.
– Take into consideration the ambient conditions at the location of use.
– Observe the specifications on the product labelling.
Media
– Only use media in accordance with the specifications è Technical data.
– Use only media to which the materials used for the seal cartridge and cover
are resistant. For evaluation of the media resistance
è
www.festo.com.
– Use only media that will not cause dangerous reactions if mixed.
– Due to its design, the valve is not generally suitable for solids (granulates).
Before using solids, the customer should determine that they are suitable.
Piping
Depending on the medium and the operating conditions, pressure peaks that
exceed the permissible pressure range may develop in the system. The valve may
open accidentally, and leakage of medium may occur.
–
If necessary, plan for a pressure limitation valve in the media line to maintain
the critical limits.
The separation between the media spaces is no longer guaranteed if wear causes
the seal cartridge (tubing) to leak.
–
Flow medium can exit at the exhaust port. Prevent possible hazards to per-
sons or material damage with suitable design measures.
– With ducted exhaust air, the flow medium can exit remotely from the valve.
Prevent possible hazards to persons or material damage with suitable design
measures.
If the seal cartridge (shut-off element) leaks, the exhaust port is plugged, or the
ducted exhaust air is plugged, or there is exhaust air in an equalising volume, the
flow medium may enter the operating medium.
–
Use an appropriate check valve to protect the pilot circuit against ingress of
the flow medium.
– Check exhaust regularly.
Very high temperatures may damage the seal cartridge.
–
Do not weld piping in close proximity to the valve.
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 returned 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 the handling of hazardous substances
and the transport of dangerous goods.
2.2 Intended use
Valves in the series VZQA-C-M22C-... are intended for controlling gaseous, liquid
and paste-like media with low to medium switching frequency.
2.3 Training of skilled personnel
Installation, commissioning, maintenance and disassembly should only be con-
ducted by qualified personnel.
3 Service
Contact your regional Festo contact person if you have technical questions
è www.festo.com.
4 Product overview
4.1 Configuration
4.1.1 Product design
1 Housing cover
2 Housing
3 Threaded connection for connect-
ing media-carrying piping
4 Plug screw on exhaust port
5 Operating medium port
Fig. 1 Product design of VZQA-C-M22C-6-…
Inside the valve are compression springs, pistons and a return piece as well as a
replaceable seal cartridge with stamps and a tubular shut-off element.
4.1.2 Product variants and type code
Feature Value Description
Type VZQA Pinch valve, pneumatically actuated
Product version C Easy to clean design (Clean Design)
Valve function M22C 2/2-directional control valves, normally closed (NC)
Nominal diameter DN 6 6 mm
Fitting connection 1 G G female thread
Fitting connection 2 G G female thread
Housing material V2 Stainless steel
Housing cover material V4 Stainless steel
Shut-off element material E EPDM
Pressure range of media 2 0 … 2 bar
Tab. 1 Description of key features
4.2 Function
The pinch valve is a pneumatically actuated 2/2-way valve. At rest, the valve is
closed by spring force (normally closed – NC).
Fig. 2
If the valve is supplied with operating pressure, this moves the piston and the
return piece against the spring force. The stamps thus relieved from load can now
be freely moved outward and are shifted outward by the shut-off element. The
flow medium can flow through the valve. After the operating pressure is removed,
the spring moves the return piece against the stamps and brings them back to the
initial position. The valve closes.
5 Transport and storage
• When dispatching used products: Comply with all legal requirements for the
handling of hazardous substances and the transport of dangerous goods. For
return to Festo
è Return to Festo.
• Store the product in a cool, dry, UV-protected and corrosion-protected envir-
onment. Ensure that storage times are kept to a minimum. Storage temperat-
ure
è 13 Technical data.
6 Installation
Requirement
– The piping system is unpressurised and no medium flows in it.
– Lines are clean.
– The line ends are mounted.
8097561
VZQA-C-M22C-6-GG-V2V4E-2
Pinch valve
8097561
2018-12a
[8097563]
Instructions | Operating
Festo AG & Co. KG
Ruiter Straße 82
73734 Esslingen
Germany
+49 711 347-0
www.festo.com