• 

  Seepex 503 for BN 8-121

• 

  Elesa Ganter GN 50.3-ND-25-M6

• 

  Hartmann 40T85 50E 165-503

• 

  Leine Linde RSI 503

• 

  Contrinex DW-AS-503-P20

• 

  Siemens 5TC6 205 G503 - unknown model

• 

  Refcomp SRC-S-503-14 F

• 

  Transfluid NBG200 + TF22/50 3kW / 1000 rev / min

• 

  Danotherm CBH 165 C 320R 503

• 

  Gandus BCZ model 503 Cod 15021 obsolete replaced by 15101