Sight Glass series SYJ

ref. Sight Glass series SYJ

Sight glasses are installed after the filter drier in liquid line of refrigerating systems, in order to observe property changes of the refrigerant (liquid/vapour) and to indicate the moisture level by colours.

Air conditioning Commercial Refrigeration Heat Pump

General characteristics

ModelPart numberConnection TypeConnectionsDimensions & WeightPED CategoryDrawing Price
(VAT included)


  • High precision colour indicator
  • Indicator pasted closely to the glass to prevent surface contamination
  • Solid and corrosion resistant brass material
  • Good readability due to high clear sight glass of wide angle
  • Sealing of low creep PTFE to ensure leakage free performance

General specifications

  • Applicable for all common HCFC and HFC refrigerants such as: R22, R134a, R404A, R407C, R410A, R507A...
  • Min./max. ambient temperature: -50°C to +80°C
  • Medium temperature TS min./max.: -50°C / +80°C
  • Max. operating pressure PS: 4,6 MPa (46 bar)
  • Installation position:
    • Liquid and suction line
    • Preferably in vertical lines, recommended position for horizontal lines is upwards without inclination in any direction
  • Declaration according to PED