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
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2
Safety
2.1
General safety instructions
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Only use the product in original status without unauthorised modifications.
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Only use the product if it is in perfect technical condition.
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Observe labelling on the product.
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Use the valve only in the flow direction indicated.
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Take into consideration the ambient conditions at the location of use.
Media
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Only use media in accordance with the specifications
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Do not operate the product with chemically unstable gases, abrasive mediaor
solid materials.
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If water is used: up to approx. 1000 ppm of chloride content is permitted.
Avoid tensile stresses.
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If aggressive media are used: limit temperature of medium to 65 °C.
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.
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Consult your regional Festo contact.
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Complete the declaration of contamination and attach it to the outside of the
packaging.
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Comply with all legal requirements for the handling of hazardous substances
and the transport of dangerous goods.
2.2
Intended use
The VZXF angle seat valve is intended to control gaseous or liquid media in rigid
piping systems.
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To control liquid media, use only the product variant VZXF-L-M22C-M-B-...
(closing against the direction of medium flow).
2.3
Training of qualified personnel
Work on the product should only be conducted by qualified personnel. The quali-
fied personnel must be familiar with installation of process automation systems.
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Further information
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Accessories
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Spare parts
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4
Service
Contact your regional Festo contact person if you have technical questions
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5
Product overview
5.1
Design
1 Position indicator
2 Actuator
3 Pipe connection with female
thread; feed or forwarding (corres-
ponding to flow direction)
4 Arrow for direction of flow
5 Operating medium port
Fig. 1 Product design
5.2
Product variants and type code
The following section explains selected product characteristics that are necessary
to understand the instruction manual. Description of the complete type code
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Characteristic
Value
Description
Type
VZXF
Angle seat valve, externally controlled
Valve type
L
In-line valve
Valve function
M22C
2/2-way valve, normally closed
Reset method
M
Mechanical spring
A
Over valve seat, for gaseous media
Flow direction
B
Under valve seat, for gaseous and liquid media
G12 … G2
Thread G½" … G2"
Cable connection
N12 … N2
Thread NPT½" … NPT2"
Nominal width
120 … 450
12 mm … 45 mm
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z
10 … +80 °C (standard)
Temperature range of
medium
M1
z
40 … +200 °C
H3
Red brass
Housing material
V4
Stainless steel
Actuator housing material
AL, AN, B1,
B2, V4
Aluminium; nickel-plated aluminium; brass; nickel-
plated brass; stainless steel
Stem seal material
–, T, V
Standard (NBR), PTFE, FPM
Actuator size
50, 80
50 mm, 80 mm
3 … 40
0 … 3 bar, … , 0 … 40 bar
Medium pressure
V
–0.9 … 0 bar
PWIS content
–, C
Standard, PWIS-free
Tab. 1 Description of key features
5.3
Function
The angle seat valve VZXF-L-M22C-M-.... is an externally controlled 2/2-way valve.
At rest, the valve is closed by spring force (normally closed - NC). If the actuator is
pressurised with operating pressure, it raises the control piston and simultan-
eously the valve disc. The valve opens.
The valve seat is slanted around 45° toward the media flow.
The supply of the operating medium is controlled by an external valve that must
be additionally integrated into the supply cable for the actuator.
2
1
12
Fig. 2 Circuit symbol
8092242
VZXF-L-M22C-M
Angle seat valve
8092242
2018-06b
[8092244]
Instructions | Operating
Festo
SE
& Co. KG
Ruiter Straße 82
73734 Esslingen
Germany
+49 711 347-0
www.festo.com
