Sight glass for industrial applications Type 550A

monitoringfor chemicalsATEX

The ACI flow sight glass type 550A is a robust industrial sight glass designed for visual monitoring of media in pipelines under operating pressure and flange-mounted according to ASME B16.5. It is built for durability and corrosion resistance while offering multiple material and accessory options for demanding chemical and thermal applications.

Design & application

• Body: stainless steel casting 1.4408 (high corrosion resistance and mechanical strength).
• Installation: flange-to-flange between counter flanges according to ASME B16.5 (Class 150 / 300 lbs).
• Standards & conformity: manufactured in accordance with DIN 11869 (formerly DIN 3237); design and strength calculations conform to PED 2014/68/EU and AD 2000.

Nominal sizes (NPS)

• 1/2"
• 3/4"
• 1"
• 1 1/4"
• 1 1/2"
• 2"
• 2 1/2"
• 3"
• 4"
• 5"
• 6"
• 8"

Pressure rating (Class)

• 150 lbs
• 300 lbs

Temperature options / ratings

• 80°C
• 130°C
• 150°C
• 175°C
• 180°C
• 200°C
• 280°C
• 300°C

Gasket system (standard examples)

• Frenzelit novaphit® MST XP
• KlingerSil® C4400
• Garlock Gylon®
• PTFE (pure or modified)
• Over 50 additional sealing materials available on request

Optional protective coatings / plate protection

• HALAR® coating
• FEP coating
• Mica protective disc

Factory-integrable additional equipment & options

• Sight glass wiper SGW (wiper blades in PTFE, silicone or EPDM)
• Spraying devices for cleaning
• LED lights (optional ATEX-approved versions for explosion-prone areas)
• Wiper SGW with PTFE/silicone/EPDM, LED lights for Ex and non-Ex areas, spraying device, FEP or Halar® coating, mica discs, PTFE rotor
• Oil- and grease-free design and silicone-free design (including crater test) available

Execution / flange geometry

• NPS 1/2" – 2": rectangular flanges
• NPS 2 1/2" – 8": circular flanges

Dimensions (selected values in mm)

• NPS 1/2": D (Class 150) = 89; D (Class 300) = 95.2; BL = 130; D1 = 32
• NPS 3/4": D (Class 150) = 98; D (Class 300) = 117.3; BL = 150; D1 = 32
• NPS 1": D (Class 150) = 108; D (Class 300) = 123.8; BL = 160; D1 = 48
• NPS 1 1/4": D (Class 150) = 118; D (Class 300) = 133.4; BL = 180; D1 = 48
• NPS 1 1/2": D (Class 150) = 127; D (Class 300) = 155.6; BL = 200; D1 = 65
• NPS 2": D (Class 150) = 152; D (Class 300) = 165.1; BL = 230; D1 = 80
• NPS 2 1/2": D (Class 150) = 178; D (Class 300) = 190.5; BL = 290; D1 = 80
• NPS 3": D (Class 150) = 191; D (Class 300) = 209.6; BL = 310; D1 = 100
• NPS 4": D (Class 150) = 228; D (Class 300) = 254; BL = 350; D1 = 125
• NPS 5": D (Class 150) = 254; D (Class 300) = 279.4; BL = 400; D1 = 150
• NPS 6": D (Class 150) = 279; D (Class 300) = 317.5; BL = 480; D1 = 175
• NPS 8": D (Class 150) = 343; D (Class 300) = 381; BL = 600; D1 = 175

Notes on materials & variants

• Standard material: stainless steel casting 1.4408.
• Other materials available on request (e.g. 1.0619 cast steel or Alloy C22) to customer specification.

Caractéristiques / spécifications techniques

• Manufacturer / brand: ACI Industriearmaturen GmbH
• Model / denomination: Flow sight glass type 550A
• Body material: stainless steel casting 1.4408 (alternatives on request)
• Flange standard: ASME B16.5 (compatible counter flanges)
• Pressure rating: Class 150 / 300 lbs (max. approx. 40 barg as indicated)
• Temperature range: -10°C to 280°C (options up to 300°C)
• Suitable for: liquid and gaseous media
• Nominal sizes: 1/2" – 8" (NPS)
• Sealing: wide range of gasket materials incl. Frenzelit novaphit® MST XP, KlingerSil® C4400, Garlock Gylon®, PTFE
• Standards & approvals: DIN 11869, PED 2014/68/EU, AD 2000
• Accessories / factory options: wipers, LED lights (ATEX optional), spraying device, protective coatings (FEP, HALAR®), mica discs, PTFE rotor, oil-/grease-free and silicone-free variants