Solenoid valve
VZWM-L-M22C
Festo AG & Co. KG
Postfach
73726 Esslingen
Germany
+49 711 347-0
www.festo.com
Operating instructions
8049758
1602c
[8049759]
Original: de
Solenoid valve VZWM-L-M22C
English
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
Design
1
2
3
4
5
6
7
8
1
Knurled nut for coil mounting
2
Armature guiding tube
3
Connection A: Working line (outlet
port)
4
Arrow for flow direction
5
Mounting thread for mounting
bracket
6
Connection P: Pressure supply
port (inlet)
7
Regulating screw (not with all
sizes)
8
Cover screws
Fig. 1
Product variants and type code
Characteristic
Value
Description
Type
VZWM
Electrically actuated process valve
Valve type
L
In-line valve
Valve function
M22C
2/2-way valve, normally closed (NC)
Process valve
connection
G14 … G2
Thread G
¼
, G
Å
, G½, G¾, G1, G1¼, G1½, G2
N14 … N2
Thread NPT
¼
, NPT
Å
, NPT½, NPT¾, NPT1,
NPT1¼, NPT1½, NPT2
Electrical connection
F4
With armature tube for system 8 solenoid coil
F5
With armature tube for system 13 solenoid coil
Corrosion protection
–, R1
Standard (brass), Stainless steel
Fig. 2
2
Safety
Intended use
The solenoid valve VZWM-L-M22C is intended to control flows of neutral, gaseous
and liquid media in rigid pipe systems.
– Use the valve only in the flow direction indicated.
– For operation, an appropriate solenoid coil in accordance with the accessories is
required.
– 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 operating conditions at the location of use.
– Comply with all applicable national and international regulations.
Media
– Use only media in accordance with the specifications (
è
Technical data).
– Do not operate the product with chemically unstable gases.
– Gaseous media must be dried at media temperature < 1 °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 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 of the legal requirements for the handling of hazardous sub
stances and the transport of dangerous goods.
3
Function
The solenoid valve VZWM-L-M22C is a servo controlled
2/2-way valve.
To function properly, the valve requires a differential
pressure between inlet and outlet port
(
è
Fig. 9). The
differential pressure lifts the main sealing element
(diaphragm). As a result, high pressures coupled with
large nominal diameters can be controlled with small
magnets.
Fig. 3
The solenoid valve is closed in the de-energised state (Normally Closed - NC). The
supply pressure is effective on the diaphragm and seals the valve seat.
– Open valve: If power is supplied, a bypass is opened from the input to the out
put. The pressure on the diaphragm falls off and the valve opens.
– Close valve: If the power supply is cut off, the bypass is closed again. The pres
sure on the diaphragm rises and the valve is closed.
4
Transport and storage
When shipping used products: Comply with all legal requirements for handling
hazardous substances and transporting dangerous goods.
Store the product in a cool, dry, UV- and corrosion-protected environment.
5
Installation
Note
Installation should only be conducted by qualified specialized personnel.
Requirements
– The piping system is unpressurized, and no medium flows in it.
– The lines are clean.
For fault-free operation, the effective line cross section at the input end
should be at least as large as it is at the output end. Take proper account
of the pipeline cross sections, line lengths and elements that may reduce
the flow rate (angle sections etc.).
Clean valve
Residues of grease may be evident on the product due to the production process
used.
Clean valve immediately before installation.
Mount solenoid coil
Permissible solenoid coils
è
Fig. 6.
VZWM-...
-F4
-F5
Max. tightening torque of knurled nut for coil fastening
1
[Nm]
0.5
2.0
Fig. 4
Connect lines
1. Bring the valve into its mounting position. In doing so, observe the direction of
flow. The permissible flow direction is marked by an arrow on the valve body.
2. Fasten the solenoid valve to the mounting bracket.
3. Screw the valve connections to the piping.
– Max. tightening torque (
è
Fig. 5).
Connection size
["]
¼
Å
½
¾
1
1¼
1½
2
Max. tightening torque
Connecting threads A and P
[Nm]
35
60
105
200
350
450
540
620
Fig. 5
