QVE1901U Flow Switch
Technical Instructions
Document Number 155-711
September 20, 2012
Siemens Industry, Inc.
Page 7
Specifications
Functional data
Field of use
Suitable media
water and water/glycol mixture
Piping diameter
3/4-inch to 8-inch (DN 20 to 200)
Type of switch
Reed contact
Maximum contact voltage
24 Vac/ 24 Vdc
Maximum contact current
1A
Maximum switching capacity
AC 26 VA/DC 20 W
Switching point adjustment
Manual, supplied with minimum
switch-off
value
Tolerance of switching
Point ranges in the table
±
15%
Setting
range
See
Switching Value
Table
Medium temp.
–4°F to 230°F (–20°C to 110°C)
(medium cannot freeze)
Nominal pressure
Maximum 365 psi
Protective data
Housing
IP 65 per EN 60 529
Environmental
conditions
General environmental conditions
Operation and storage
–4°F to 176°F (– 20°C to 80°C)
Ambient humidity
<95% rh
Norms and standards
conformity to Low-voltage directive
2006/95/ EEC
Product standard
EN 60204-1
Materials/color
Housing
Polyamide, black (non-wetted component)
Union nut
Brass (non-wetted component)
Body Brass
Threaded adapter 1/2” NPT
Brass
Paddle system
PPO (Noryl GFN3), black
Axle Stainless
Steel
Magnet Hard
ferrite
Seal NBR
Weight
Excluding packaging
10.93 ounces (0.31 kg)
Maintenance and repair
The flow switch is maintenance-free and cannot be repaired by the user. In the unlikely
event of a defect, the device has to be returned to the manufacturer for repair.
Decommissioning and
disposal
SEN0540R1
•
Never remove a flow switch or its upper parts from a system under pressure.
•
Remove all the electrical connectors and disassemble the flow switch.
•
The flow switch consists of various materials (see
Specifications
). Never dispose of the
level switch in domestic waste.
