Festo VZQA-C-M22C-6-GG-V2V4E-1 Operating Instructions

Pinch valve
VZQA-C-M22C-6-GG-V2V4E-1
Operating instructions
(Original instructions)
Pinch valve VZQA-C-M22C-6-GG-V2V4E-1
For all available product documentation è www.festo.com/pk
1 Design
5
4
3
1
Housing cover
2
Housing
3
Threaded connection for connect­
ing media-carrying pipeline
Fig. 1
Inside the valve are compression springs, pistons and a diverter as well as a re­
placeable seal cartridge with rods and a tubular shut-off element.
Product variants and type code
Characteristic Version
Type VZQA
Product version C
Valve function M22C
Nominal diameter DN 6
Process valve port 1 G
Process valve port 2 G
Housing material V2
Housing cover material V4
Material, shut-off element E
Pressure range of media 1
Fig. 2
Festo AG & Co. KG
Ruiter Straße 82
73734 Esslingen
Germany
+49 711 347-0
www.festo.com
8075498
2017-08
[8075500]
. . . . . . . . . . . . . . . . . . . . . . . . . .
4
Blanking screw on exhaust port
5
Operating medium port
Description
Pinch valve, pneumatically actuated
Easy to clean design (Clean Design)
2/2-way valve,
normally closed (NC)
6 mm
G-female thread
G-female thread
Stainless steel
Stainless steel
EPDM
0 ... 1 bar
2 Safety
Intended use
Valves in the VZQA-C-M22C-... series are intended for controlling gaseous, liquid
and paste-like media with low to medium switching frequency.
– The product may only be used in its original status without unauthorised modi­
fications.
– Only use the product if it is in an excellent technical status.
– Take into consideration the ambient conditions at the location of use.
– Observe the specifications on the rating plate.
Media
– Use only media in accordance with the specifications (è Technical data).
– Use only media that the material used for the seal cartridge and cover are resist­
ant to.
For evaluation of the resistance to media 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 (granulates), the customer should determine suitability.
Piping system
Dependent on the medium and the operating conditions, pressure peaks that ex­
ceed the permissible pressure range can develop in the system. The valve can
open accidentally and medium can exit.
– If necessary, plan for a pressure limitation valve in the media line to comply with
the limit values.
The separation between the media spaces is no longer guaranteed if wear causes
English
the seal cartridge (hose) to leak.
– Flow medium can exit at the exhaust port. Prevent possible hazards to persons
or material damage through suitable constructive measures.
– With ducted exhaust air, the flow medium can exit remotely from the valve. Pre­
vent possible hazards to persons or material damage through suitable con­
structive measures.
If the seal cartridge (shut-off element) leaks and the exhaust port is plugged (or in
the case of plugged ducted exhaust air or exhaust air in an equalising volume), the
flow medium can enter the operating medium.
1
– Use an appropriate non-return valve to protect the pilot circuit against ingress of
the flow medium.
– Check exhaust regularly.
Very high temperatures can damage the seal cartridge.
– Do not weld the piping in close proximity to the valve.
Return to Festo
2
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.
1
– Complete the declaration of contamination and attach it to the outside of the
packaging.
– Comply with all of the legal requirements for the handling of hazardous sub­
stances and the transport of dangerous goods.
3 Function
The pinch valve is a pneumatically actuated 2/2-way valve.
At rest, the valve is closed by spring force (normally
closed – NC).
If the valve is pressurised with operating pressure, it moves the piston and the
diverter against the spring force. The rods thus untensioned are now freely mov­
able to the outside and are placed on the outside by the blocking element. The
flow medium can now flow through the valve.
After the operating pressure is removed, the spring moves the diverter against the
rods and brings them back to the initial position. The valve closes.
4 Transport and storage
• When shipping used products: Comply with all legal requirements for handling
hazardous substances and transporting dangerous goods.
For return to Festo è Chapter 2.
• Store the product in a cool (storage temperature 6...8 °C), dry, UV- and corro­
sion-protected environment. Ensure storage times are short.
Fig. 3