Diaphragm single stage automatic switchover board with manual reset & with balanced valve - TD502
Equipment for gas systems > Speciality gas equipment > Supply & switchover boards
The TD502 switchover board is ideally suited to insure gas supply from many high pressure sources of high purity non-corrosive gases with high flow. The device is dedicated to supply of gas to analyzers and to create a controlled atmosphere in laboratories, control units, and for petrochemical applications.
Key advantages
  • Maintains purity: eliminates cross-flow mixing of supply sources
  • Possible to connect up to 6 cylinders without using the purge line
  • Outstanding pressure consistency with Balanced Valve Technology
  • Ready to install with all components pre-mounted on a board
  • Can be equipped with a collection tube on the relief valve and purge outlet
  • Can be equipped with an outlet shut-off valve
  • Using contact gauges, the switchover board can also be equipped with an alarm box to indicate the source status


Product image

Product image

Product image

Female portsG 3/8 (inlet/outlet) or 1/4 NPT (inlet/outlet)
Seat sealPCTFE
O-ringEPDM - standard FPM
DiaphragmAISI 304 Hastelloy®
Weight± 13 kg
Leak rate10-8 mbar ℓ/s He
Temperature range-20 to +60 °c
GaugesHigh and low pressure (M10 x 1 or 1/8 NPT)
Inlet pressure200 bar
Outlet Pressure10/25/50 bar
Nominal flow50/50/100 Nm3 /h (N2)
Oxygen useBrass only with inlet pressure 200 bar
Dimensional drawings
Product Configurator
Body material
Inlet pressure and version type
Outlet Pressure
End connections
O-ring material
Outlet valve
Chrome Plated Brass
Stainless steel
200 bar (2900 psig) Automatic switch with manual reset
10 bar 145 psig
25 bar 362.5 psig
50 bar 725 psig
G 3/8 - Female
1/4 NPT - Female
with gauges - standard
with HP inductive contact gauges
without outlet shut-off valve (standard)
with outlet shutoff valve
Standard configuration
with connected purge and relief valve
Downloadable catalogs, brochures
  • Download
    Supply and Switchover Boards
    Last update: Mar 17, 2021
    Available in: en/cn/de/fr
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