The PCS is a mechanically activated switch for monitoring the position of the valve plate.
This device can be fitted to the Elektrogas aluminium valves series VMR, VML, VMM, VMH,
EVRM-NA, EVRM-6NA, EVRM-NC, EVRM-6NC to check the closed position of the plate.
It can be fitted to the N.O. vent valve VMRNA to check the open position of the plate.
It can be also fitted to solenoid actuators (SR – SL – ST) to check the open/closed position of the
butterfly valve (VF – VFH).
PCS is available with working pressure 500mbar or 6bar.
An adapting rod is necessary to fit the switch to an Elektrogas valve or actuator. The switch is
supplied with the rod already mounted, to make installation easier.
The switch can be rotated on 360° on rod axis.
Electrical connection with ISO4400 plug.
It is suitable for air and non-aggressive gases (families 1-2-3 EN437). Special versions are
available for use with aggressive gases.
The compact, robust and functional design permits a simple and quick installation, and it is
essentially maintenance free.
All components are designed to withstand mechanical, thermal and chemical stresses present
in a typical installation.
The device can be provided in Ex-proof execution, for use in Zones 2 and 22, according to
2014/34/UE Directive (ATEX).
Switches are 100% tested for seal and functioning.
The PCS is a mechanically activated switch for
monitoring the position of the valve plate.
In a normally closed valve (Fig.2 shows a PCS
installed in a VMR valve), when valve is not
energized, plate is in contact with valve seat.
Switch rod is pushed and the electric contact is
switched in configuration 1-3.
When valve opens, plate leaves seat and frees the
rod, so that contact switches in configuration 1-2,
under the action of a return spring.
The EN 161 standard specifies that switch has to
commute when plate is within 1 mm to its closed
position, so PCS is a device to detect the closed
status, not the completely open one.
In the normally open valve VMRNA, PCS is mounted over
the stem. When valve is not energized, disc is open and the
magnetic core pushes the switch rod, so electric contact is
switched in configuration 1-3. When valve is energized,
magnetic core pushes disc on seat and frees the PCS rod,
so that contact switches in configuration 1-2.
Connection G1/8 (ISO 228-1)
Max operating pressure 500 mbar or 6 bar
Max testing pressure 0.75 bar or 9 bar
Environmental temperature -15°C / +60°C
Installation See valve instruction sheet for the correct position
Gas type Air and non aggressive gases (fam. 1-2-3 EN 437)
Special versions for aggressive gases
Switching capacity Resistive Load Inductive Load/ Lamp
(standard silver contact) 250VAC 2A 250VAC 0.3A
120VAC 3A 120VAC 0.5A
30VDC 3A 30VDC 1A
Electrical connection ISO 4400 plug with PG11 cable gland
Enclosure IP54 (EN 60529)
Weight 0,20 Kg
0,30 Kg (Ex-proof version)
Materials in contact with media Aluminum