Festo VZQA-C-M22C-6-GG-V2V4E-2 Parts list manual

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
1Housing cover
2Housing
3Threaded connection for connect-
ing media-carrying piping
4Plug screw on exhaust port
5Operating 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
[phone]
www.festo.com

– Protective measures are installed on the system (e.g.flow control valve or
control valve, check valve, pressure limitation valve).
Cleaning the valve
• Remove all transport packaging. The material used in the packaging has been
specifically chosen for its recyclability.
• Traces of residual grease may be evident on the product due to the produc-
tion process used. Clean the valve immediately before installation.
Connecting the media line
NOTICE!
To eliminate direct access to the valve opening during operation, connect a line to
both ports, even if the valve is located at the end of the piping.
• Screw the valve connections to the line.
– Tightening torque: 10Nm
Connect the operating medium line
1. Mount the fitting on the operating medium connection.
– Max. permissible screw-in depth (è Fig.1,4 und 5): 3mm
2. Connect the operating medium line.
3. Mount the plug screw on the exhaust port.
Additional steps for ducted exhaust air:
1. Remove the plug screw at the exhaust port.
2. Connect the piping for the ducted exhaust air to the exhaust port.
– Max. permissible screw-in depth (è Fig.1,4 und 5): 3mm
7 Commissioning
Requirements
– Protective measures are installed on the system (e.g. flow control valve or
control valve, check valve, pressure limitation valve).
– The valve is fully mounted and connected.
Checking operating conditions
WARNING!
Risk of injury from hot media under pressure.
Dependent on the medium and the operating conditions, pressure peaks that
exceed the permissible pressure range can develop in the system. The valve can
open accidentally, and medium can exit.
• Do not exceed the maximum permissible medium pressure. In doing so, take
pressure peaks in the system into account.
• Check operating conditions and critical limits è 13 Technical data.
• Check connection points for tightness.
• Check compatibility of the devices in the system for maximum pressure (con-
sider pressure peaks). If necessary, adjust the application parameters.
Commissioning the valve
1. Supply medium.
2. Supply operating pressure to the valve.
ÄThe valve opens.
8 Operation
WARNING!
Risk of injury from hot media under pressure.
If the seal cartridge (shut-off element) leaks and the exhaust port is plugged (or
the ducted exhaust air is plugged or in the case of exhaust air in an equalising
volume), the flow medium can enter the operating medium.
• Use only media that will not cause dangerous reactions if mixed.
WARNING!
Risk of injury due to hot surface.
The valve can become hot if the temperature of the medium is high.
• Do not touch the valve during operation or immediately afterward.
• Observe the operating conditions.
• Comply with permissible critical limits.
• Comply with maintenance conditions è 9 Maintenance and care.
Recommendation: Switch valve several times per day.
After longer idle times:
• Actuate the valve several times and check for correct function.
9 Maintenance and care
WARNING!
Risk of injury from combustion and chemical burns.
The media in the piping system and the valve can be hot and under pressure.
Traces of medium can remain in the product and can escape when open or dis-
mantled.
• Allow the valve and piping to cool and depressurize them.
• Wear specified protective equipment.
Checking and cleaning the valve
• Check product regularly from the outside for leakage and function.
• Check plug screw and ducted exhaust air for passage. Remove blockages
• Clean product regularly.
• Comply with replacement interval of the spring, guiding band and piston seal:
max. 5million switching cycles.
NOTICE!
Allow for ducted exhaust air when cleaning the outside.
• Replace the plug screw with a threaded insert or connector. Observe the max-
imum permissible screw-in depth.
Checking and replacing the seal cartridge
NOTICE!
Seal cartridge may only be changed by qualified personnel following the assembly
instructions èAssembly instructions for seal cartridge.
The seal cartridge is subjected to mechanical loads and ageing. A damaged or
worn seal cartridge results in leakage.
• Check and replace seals and seal cartridge regularly (intervals dependent on
the medium).
• Replace seal cartridge and seals if they are damaged. Use a seal cartridge
with the same specification.
•Comply with replacement interval of the seal cartridge: max. ½½million
switching cycles.
10 Fault clearance
Fault description Cause Remedy
Valve is blocked. Clean valve or replace seal cart-
ridge.
Operating medium line is
blocked.
Clean or replace operating
medium line.
Shut-off element is stuck
together because the material
of the shut-off element is not
suited for the medium.
Replace product with a product
variant made of appropriate
materials.
Valve does not open or opens
too slowly.
Seal cartridge is faulty. Replace seal cartridge.
Medium pressure is too high. Reduce medium pressure.Valve opens accidentally.
Seal cartridge is faulty. Replace seal cartridge.
Operating pressure is still
present.
Shut off the operating pressure.Valve does not close or closes
too slowly.
Seal cartridge is faulty. Replace seal cartridge.
Leakage Seal cartridge is faulty. Replace seal cartridge.
Tab. 2
11 Disassembly
WARNING!
Risk of injury from combustion and chemical burns.
The media in the piping system and the valve can be hot and under pressure.
Traces of medium can remain in the product and can escape when open or dis-
mantled.
• Allow the valve and piping to cool and depressurize them.
• Wear specified protective equipment.
1. Depressurise the piping and the operating medium line.
2. Allow the valve and piping to cool.
3. Empty the piping and valve completely.
– Make sure no one is located in front of the outlet opening.
– Catch discharging media in a suitable container.
4. Disconnect the operating medium line from the valve.
5. Disconnect the piping connections and remove the valve.
12 Disposal
• Observe the local regulations for environmentally friendly disposal.
• Dispose of the product in an environmentally friendly manner. When doing
this, also take residual media into account (recycling of hazardous waste
where appropriate).

13 Technical data
General VZQA-C-M22C-6-GG-V2V4E-2
Design Pinch valve, pneumatically actuated
Nominal width DN 6
Actuation type Pneumatic
Sealing principle Soft
Mounting position Any
Type of mounting In-line installation
Valve function 2/2-way, closed, monostable
Flow direction Reversible
Reset method Mechanical spring
Type of control Externally controlled
Switching time on [ms] 125
Flow rate Kv [m3/h] 0.7
Switching time off [ms] 125
Medium pressure [bar] 0…2
Nominal pressure of fitting
PN
10
Burst pressure [bar] 16
Operating pressure [bar] 3.5…6.0
Operating medium Compressed air to ISO8573-1:2010 [7:4:1]
Medium Compressed air to ISO8573-1:2010 [-:-:1], water
Max. viscosity [mm2/s] 4000
Temperature of medium [°C] 15…50
Ambient temperature [°C] –5…+60
Storage temperature [°C] 6…8
Product weight èwww.festo.com/catalogue
Fitting connection G¼
Operating medium connec-
tion 12
M3
Housing material High-alloy stainless steel (1.4301)
Housing cover material High-alloy stainless steel (1.4435)
Seals material FPM
Shut-off element material EPDM
Tab. 3 Technical data
Tightening torques VZQA-C-M22C-6-GG-V2V4E-2
Housing cover, customer interface, connec-
tion type G/T
[Nm] 10±10%
Housing cover with housing [Nm] èAssembly instructions for seal cartridge
Tab. 4 Tightening torques