Sight glass for industrial applications Type 641

monitoringborosilicate glassflange

The intermediate sight glass type 641 is a compact tubular flow sight glass for visual process monitoring, designed for space-saving installation between flanges according to DIN EN 1092-1. It is suitable for both liquid and gaseous media and allows retrofitting into existing systems even where installation space is limited.

Key features

• Intermediate flange design for installation between WN flanges (DIN EN 1092-1)
• Compact glass-ring tubular construction suitable for retrofit
• Suitable for liquid and gaseous media

Materials & thermal resistance

• Standard: borosilicate glass (heat resistant up to 280 °C)
• Acrylic glass available as alternative (see dimensions/pressure table for limits)

Options

• FEP or Halar® coating
• Custom-made lengths

Technical data / Specifications

• Model: Glass-ring tubular sight glass type 641
• Brand: ACI Industriearmaturen
• Standard flange: WN flange type 11 according to DIN EN 1092-1
• Nominal sizes (DN): 10, 15, 20, 25, 32, 40, 50, 65, 80, 100, 125
• Nominal pressure (PN): 25, 40
• Temperature (standard borosilicate glass): up to 280 °C; other ratings available: 80 °C, 130 °C, 150 °C, 175 °C, 180 °C, 200 °C, 280 °C
• Options: FEP or Halar® coating; custom lengths
• Dimensions and related data (for L = 50 mm) per DN:
  • DN 10 — Di 14 mm; Da 40 mm; Weight (borosilicate) 0.13 kg; Weight (acrylic) 0.07 kg; PS (max) 40 barg (borosilicate), 25 barg (acrylic)
  • DN 15 — Di 18 mm; Da 45 mm; Weight (borosilicate) 0.16 kg; Weight (acrylic) 0.08 kg; PS 40 barg / 25 barg
  • DN 20 — Di 22 mm; Da 58 mm; Weight (borosilicate) 0.27 kg; Weight (acrylic) 0.13 kg; PS 40 barg / 25 barg
  • DN 25 — Di 29 mm; Da 68 mm; Weight (borosilicate) 0.36 kg; Weight (acrylic) 0.18 kg; PS 40 barg / 25 barg
  • DN 32 — Di 38 mm; Da 79 mm; Weight (borosilicate) 0.46 kg; Weight (acrylic) 0.22 kg; PS 40 barg / 20 barg
  • DN 40 — Di 44 mm; Da 88 mm; Weight (borosilicate) 0.56 kg; Weight (acrylic) 0.27 kg; PS 40 barg / 20 barg
  • DN 50 — Di 55 mm; Da 102 mm; Weight (borosilicate) 0.71 kg; Weight (acrylic) 0.34 kg; PS 40 barg / —
  • DN 65 — Di 71 mm; Da 122 mm; Weight (borosilicate) 0.94 kg; Weight (acrylic) 0.46 kg; PS 25 barg / —
  • DN 80 — Di 83 mm; Da 138 mm; Weight (borosilicate) 1.16 kg; Weight (acrylic) 0.56 kg; PS 25 barg / —
  • DN 100 — Di 108 mm; Da 158 mm; Weight (borosilicate) 1.27 kg; Weight (acrylic) 0.62 kg; PS 25 barg / —
  • DN 125 — Di 132 mm; Da 188 mm; Weight (borosilicate) 1.71 kg; Weight (acrylic) 0.83 kg; PS 20 barg / —
• Notes: Weights in kg for L = 50 mm; PS = max. operating pressure in barg; other materials, sizes, lengths and flange standards available on request