GB Straight-Through Sight Glass
Straight-Through Sight Glass — GB Standard Inline Flanged Sight Flow Indicator - Image 2
Straight-Through Sight Glass — GB Standard Inline Flanged Sight Flow Indicator - Image 3

Straight-Through Sight Glass — GB Standard Inline Flanged Sight Flow Indicator

Straight-through sight glass (GB standard) for inline visual inspection. Flanged tubular sight glass, borosilicate tube, stainless steel body. Datasheet & COA available.

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Description

Straight-through sight glass provides a clear, inline view of process fluids. Manufactured to GB / Chinese standard dimensions, this flanged tubular sight glass suits pipelines, process vessels and replacement parts. It gives immediate visual checks for flow, color, and contamination. Download the datasheet or request a quote with your DWG/STEP.

Why choose this straight-through sight glass?

  • GB standard compatibility: Manufactured to GB (Chinese standard) sizing for interchangeability with national-standard fittings.
  • Unobstructed inline view: Tubular design provides clear visual inspection of flow and media condition.
  • Robust construction: Borosilicate glass tube (standard), stainless steel 304/316 housings and choice of gaskets for chemical compatibility.
  • Serviceable designs: Three-piece cartridges or full-body assemblies enable fast onsite maintenance.
  • Traceable quality: Batch COA, dimensional reports and pressure test certificates supplied on request.

Product at a glance

Product Specifications

Product type Straight-through / inline tubular sight glass (GB standard)
Standard GB national standard sizing (custom options available)
Tube material Borosilicate glass (standard); toughened glass or quartz optional
Valve body material There are carbon steel, stainless steel, rubber lining, fluorine lining, etc.
Connection Flanged (GB/ANSI/DIN), threaded (BSP/NPT), tri-clamp
Sizes Download data sheet; custom  available
Temp range <300°C (material dependent)
Nominal pressure range 10, 16, 25, 40, 64, 100 kg.
Application Used for drainage or reflux before the receiving tank, cooling water, and other liquid pipelines to observe liquid flow.

Variants & options

  • Straight-through tubular sight glass (single tube)
  • Three-piece serviceable cartridge (quick replacement)
  • Full-view plate model for a larger viewing area
  • Illuminated model with LED backlight
  • Special seals (PTFE/EPDM/FFKM) and sanitary finishes

Downloads

Straight-Through Sight Glass — Datasheet (PDF): straight-through-sight-glass-datasheet

FAQ

1. Is this compatible with ANSI/DIN flanges?
Yes. We provide flanged variants to match GB, ANSI, and DIN drilling; specify your flange standard at order.
2. Can I order a replaceable tube cartridge?
Yes. The three-piece cartridge design allows quick tube changes to reduce downtime.
3. Which glass is best for steam service?
Tempered borosilicate or quartz is suitable for high-temperature/steam conditions; contact us with your operating P/T for recommendation.

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