Borosilicate glass sight glass Type 670

tempered glass facingflange

Glass ring tubular sight glass with a 360° panoramic view, designed for working pressures up to 16 barg and for installation between flanges according to DIN EN 1092-1. The compact design is suitable for retrofitting in existing systems and for both liquid and gaseous media.

Key information

• Intermediate flange design for flanges acc. to DIN EN 1092-1
• Working pressure: max. 16 barg
• 360° panoramic (free) view
• Standard glass: borosilicate glass (tempered)
• Standard glass temperature resistance up to 280 °C
• Suitable for liquid and gaseous media
• Compact design – ideal for retrofitting in confined spaces
• Custom designs and other nominal sizes available on request
• Sealing with flat seals from a wide range (>50) of materials (examples: fiber seals, PTFE (Teflon®), NBR, novaphit® MST-XP, KlingerSil® C4400 and many branded seals)
• Recommended alternative for higher pressures: type 671 (if higher pressure required while retaining 360° view)

Available nominal sizes / table (dimensions & weights)

• DN 10: Di = 13 mm; DF = 40 mm; L = 134 mm; Weight = 1 kg; PS² = 16 barg
• DN 15: Di = 18 mm; DF = 45 mm; L = 134 mm; Weight = 3 kg; PS² = 16 barg
• DN 20: Di = 22 mm; DF = 58 mm; L = 134 mm; Weight = 3.5 kg; PS² = 16 barg
• DN 25: Di = 29 mm; DF = 68 mm; L = 134 mm; Weight = 4 kg; PS² = 16 barg
• DN 32: Di = 38 mm; DF = 78 mm; L = 134 mm; Weight = 6 kg; PS² = 16 barg
• DN 40: Di = 44 mm; DF = 88 mm; L = 144 mm; Weight = 7 kg; PS² = 16 barg
• DN 50: Di = 55 mm; DF = 102 mm; L = 144 mm; Weight = 9 kg; PS² = 16 barg
• DN 65: Di = 71 mm; DF = 122 mm; L = 146 mm; Weight = 11 kg; PS² = 16 barg
• DN 80: Di = 83 mm; DF = 138 mm; L = 148 mm; Weight = 13 kg; PS² = 16 barg
• DN 100: Di = 108 mm; DF = 158 mm; L = 148 mm; Weight = 15 kg; PS² = 16 barg
• DN 125: Di = 132 mm; DF = 188 mm; L = 158 mm; Weight = 19 kg; PS² = 16 barg
• DN 150: Di = 160 mm; DF = 212 mm; L = 158 mm; Weight = 24 kg; PS² = 16 barg
• DN 200: Di = 208 mm; DF = 268 mm; L = 164 mm; Weight = 33 kg; PS² = 16 barg

Temperatures & materials

• Available temperature ratings / options listed on the product page: 80 °C, 130 °C, 150 °C, 175 °C, 180 °C, 200 °C, 280 °C (standard borosilicate up to 280 °C)
• Glass: borosilicate glass, tempered
• Outside diameter, hole circle and drillings according to DIN EN 1092-1

Certifications & additional notes

• Certified quality (e.g. TÜV / ISO shown on product page)
• Other nominal sizes and special designs available upon request