The document discusses the standard NAMUR valve VSNC from Festo. It can be used in a variety of industry segments and applications. The valve has a modern design, durable quality, and tested technology/materials. It offers good price/performance. The valve comes in variants for single or double acting actuators by rotating the seal. It includes explosion-proof solenoid systems certified for zones 1 and 2. The valve has a simple component management with pre-assembled or assemble yourself options using a proven interface.

1. www.festo.com
Standard NAMUR valve VSNC
The new NAMUR generation
The standard NAMUR valve VSNC is certifi ed worldwide in
accordance with the usual explosion-protection standards and can
be used in many industry segments and applications. Its distin-guishing
features are a modern design, durable quality and fully
tested technology and materials. The product also offers a very
attractive price/performance ratio. This is what modern NAMUR
valves should be!
Single- or double-acting?
No matter whether you are using
a single- or double-acting actua-tor,
VSNC offers you the right
solution with just one valve. All
you have to do is turn the seal at
the NAMUR interface – and a
3/2-way valve becomes a 5/2-
way valve.
Explosive environment?
No problem!
The VSNC product range includes
IEC EX-certifi ed solenoid systems
for zones 1 and 2, CL I variants
and Div. I solenoid systems in
accordance with NEC 500.
Simple low-cost component
management
Order pre-assembled or assem-ble
it yourself: as a proven inter-face,
the hollow armature tube
reduces your need to maintain
stocks of components. You can
determine the appropriate coil
voltage yourself and mount the
coil.
Highlights
• Rotatable seal for 3/2- or
5/2-way function
• Wide choice of EX solenoid
systems
• Robust and capable of high
fl ow rates
• Suitable for a broad range
of applications
• Extended temperature
range
• Excellent price/perfor-mance
ratio
EX-certifi ed and
inexpensive

2. Standard NAMUR valve VSNC
Versatile, inexpensive, safe: an overview of the valve range
Festo AG & Co. KG
Postfach
73726 Esslingen
Ruiter Straße 82
73734 Esslingen
Tel. +49 (0)711 347 0
Fax +49 (0)711 347 26 28
E-mail: info_de@festo.com
PSI 929.2 en 2014/05 – Errors and omissions excepted
In contrast to the discrete processes associated with factory automa-tion,
process automation involves continuous processes. Most of
these involve mixing or fermenting liquids, bulk materials, gases, etc.
Process valves control the flow of these. The valves consist of the
­following
components:
• Main valve (e.g. butterfly valve VZAB)
• Quarter turn actuator (e.g. DFPB)
• Sensor box to indicate the switching position (e.g. DAPZ)
• Pilot valve VSNC for pneumatically triggering the actuator
Standard VSNC-… F8
Standard valve IP 65
Cost efficient
VSNC - … FN
Zone 1
Intrinsically safe
Ex-ia
Zone 1
Encapsulated
Ex-m
Zone 2
Non-sparking
Ex-na
Class I; Div I
Encapsulated
AEx-m
NAMUR interface: Ideal for …
… use with process valves in many industry segments and applications.
For example:
• Chemical industry
• Biotech/pharma
• Water/wastewater
• Food Processing
Technical data
Design Spool valve
Valve function single solenoid 5/2- or 3/2-way, selectable
Valve function double solenoid 5/2- or 5/3-way (b, e, g)
Pneumatic ports 1, 3, 5 G 1/4, NPT 1/4
Pneumatic ports 2, 4 VDI/VDE 3845 (NAMUR)
Type of return Mechanical spring
Manual override Detenting, non-detenting, none
Temperature range -20 …. +60 °C
Operating pressure 2.5 … 10 bar
www.festo.com