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bio-t®

Vessel Sight Glass

Sight glass in a block flange for vessels, with seal system acc. bio-plus®. The borosilicate glass window is bolted in place with a cover flange; available in ISO dimension from DN50 to DN150.

Vessel sight glass bio-plus®PDF · 509 KB · DE/EN
DN50…150nominal size, ISO dimension
8bar operating pressure maximum
140°C operating temperature maximum
6gasket materials, EPDM as standard

Overview

A window. In the vessel wall.

The vessel sight glass sits in a block flange in groove design acc. bio-plus®. The borosilicate glass disc is held by a cover flange with hexagon bolts and sealed with an O-ring.

  • For gases and liquids
  • Block flange in groove design acc. bio-plus®
  • Sight glass made of borosilicate glass
  • ISO dimension, nominal sizes DN50 to DN150
  • Operating pressure up to 8 bar, temperature up to 140 °C
  • Gaskets EPDM as standard, others acc. ordering key
  • Mounting and retaining parts in A2
  • Product-contact parts marked with article number, material and heat number
  • Inspection certificate EN10204 3.1 for product-contact parts

Versions

Block flange, front end, replacement glass.

Block Flange Sight Glass BFSG

acc. bio-plus®, DN50 to DN150Block Flange Sight Glass BFSG

Sight glass in the block flange, borosilicate glass, cover flange in 1.4305, bolts in A2. Five sizes in ISO dimension.

with threaded ferrule bio-plus®Front Sight Glass ISO25

Threaded ferrule bio-plus® ISO25 in 1.4435 (316L) with sight glass nut, O-ring, borosilicate glass and PTFE insert. Sight diameter 25 mm, outside diameter 52 mm.

Sight Glass Plate

DIN7080Sight Glass Plate

Borosilicate sight glass plate as spare part and accessory.

Sizes

Five nominal sizes. One design.

Main dimensions of the block flange sight glass BFSG in ISO dimension: outside diameter D, sight diameter d, bolt circle TK and bolting M.

Nominal sizeDmmdmmTKmmM
ISO5010348854xM8
ISO65125651048xM10
ISO80137701168xM10
ISO1001681001468xM10
ISO1502601502208xM12

Technical data

Materials, gaskets, operating limits.

Nominal sizes
DN50, DN65, DN80, DN100, DN150 in ISO dimension
Seal system
bio-plus®, block flange in groove design
Sight glass
Borosilicate glass
Product contact
1.4435 BN2 (316L); special materials such as 2.4602, titanium or 1.4539
Non product contact
1.4305 or equivalent; mounting and retaining parts A2
Gaskets
EPDM (standard), silicone, FKM, FEP with silicone core, PEEK, FFKM
Surface
Product contact electropolished Ra < 0.6 µm, other finishes acc. ordering key
Operating pressure
Maximum 8 bar
Operating temperature
Maximum 140 °C
Media
Gases and liquids
Traceability
Product-contact parts marked with article number, material and heat number
Certificates
EN10204 3.1 for product-contact parts

Ordering key

Five positions, one sight glass.

Example: BFSG.Z50.BG0.05.0 — block flange sight glass bio-plus®, ISO dimension, DN50, borosilicate glass, 1.4305, EPDM gasket.

Article and size

  • BFSG: block flange sight glass bio-plus®
  • Z: ISO dimension
  • Nominal size 50, 65, 80, 100 or 150

Glass and material

  • BG0: borosilicate glass
  • 05: 1.4305 (standard)
  • Mounting and retaining parts in A2

Gasket

  • 0: EPDM
  • 1: silicone
  • 2: FKM
  • 3: FEP with silicone core
  • 4: PEEK
  • 5: FFKM

Front sight glass ISO25

Five parts. Each available separately.

The front sight glass bio-plus® ISO25 consists of five individual parts, each with its own article number.

Parts

  • Threaded ferrule bio-plus® ISO25, 1.4435 (316L), B1.N25.35.C
  • Sight glass nut bio-plus® ISO25, 1.4301 (P0.N25.01)
  • O-ring bio-plus® ISO25, EPDM (01.N25.0)
  • Borosilicate glass bio-plus® ISO25 (04.N25.GB0)
  • Plastic insert sight glass ISO25, PTFE (05.N25.6)

Contact

Enquiry

Tell us the nominal size, gasket material and medium as well as pressure and temperature in the vessel. We will propose the right version.

Prefer to write directly?

+41 55 450 83 00 sales@liquitec.ch