Circular Sight Glass Fittings

Low Pressure Sight Glass

Low Pressure Sight Glass

SKU: Low Pressure Sight Glass

Low-Pressure Circular Sight Glass Fittings John Moncrieff’s low-pressure circular sight glass fittings provide a compact, economical, and reliable solution for direct proc...

DIN 28120 Sight Glass

DIN 28120 Sight Glass

SKU: DIN 28120 Sight Glass

DIN 28120 Circular Flanged Sight Glass Fittings John Moncrieff’s DIN 28120 circular flanged sight glass fittings are engineered for high-integrity process visibility...

Double Glass Sight Glass Fitting

Double Glass Sight Glass Fitting

SKU: Double Glass Sight Glass Fitting

Double Glass Sight Glass Fitting The Double Glass Sight Glass Fitting from John Moncrieff Ltd is engineered for applications demanding an extra level of operational securi...

DIN 28121 Circular Sight Glass Fitting

DIN 28121 Circular Sight Glass Fitting

SKU: DIN 28121 Circular Sight Glass Fitting

DIN 28121 Circular Sight Glass Fitting John Moncrieff’s DIN 28121 circular sight glass fittings are precision-manufactured assemblies designed for bolting directly on...

MV-S Aseptic Screwed Sight Glass Fitting

MV-S Aseptic Screwed Sight Glass Fitting

SKU: MV-S Aseptic Screwed Sight Glass Fitting

MV-S Aseptic Screwed Sight Glass Fitting The MV-S Aseptic Screwed Sight Glass Fitting is a high-integrity weld-on assembly designed for applications where hygienic perfor...

DIN 11851 MV Screwed Sight Glass

DIN 11851 MV Screwed Sight Glass

SKU: DIN 11851 MV Screwed Sight Glass

DIN 11851 MV Screwed Sight Glass The DIN 11851 MV Screwed Sight Glass is a hygienic weld-on assembly engineered for process visibility in sanitary and aseptic application...

Non-Pressurised Sight Glass

Non-Pressurised Sight Glass

SKU: Non-Pressurised Sight Glass

Non-Pressurised Sight Glass The Non-Pressurised Sight Glass is a cost-efficient, hygienic viewing solution designed for welding into or onto vessel walls. This low-profil...

SKS/ESKS LED

SKS/ESKS LED

SKU: SKS/ESKS LED

SKS / ESKS LED Integrated Sight Port Assemblies The SKS / ESKS LED series provides a high-performance combination of rapid-access sight ports and, in the ESKS version, an...

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Precision-Engineered Circular Sight Glass Fittings

These precision-engineered sight glass fittings feature a circular, flanged architecture designed for secure bolting or welding either into or onto vessel walls. Built for demanding industrial service, they deliver dependable visibility into process conditions while maintaining full pressure integrity.

Each assembly is supplied as a complete, ready-to-install unit, incorporating high-performance sealing elements and a durable, optically clear sight glass disc, accurately positioned between the flange rings. This robust construction ensures long-term reliability, leak-tight operation, and exceptional mechanical stability—essential for vessels, reactors, tanks, and pipelines operating under harsh conditions.

Key Advantages

  • Robust Flanged Design: Engineered for welding or bolting to provide a secure, permanent installation.
  • Complete Assembly: Delivered with matching seals and a precision-finished sight glass disc.
  • High Pressure & Temperature Capability: Maintains structural integrity in aggressive process conditions.
  • Reliable Process Visibility: Clear, uninterrupted viewing of vessel interiors for operational control and safety.
  • Leak-Tight Performance: Designed to ensure dependable sealing and prevent product loss or contamination.

Typical Applications

  • Chemical and petrochemical processing
  • Pharmaceutical and biotechnology systems
  • Food and beverage production
  • General industrial vessels and tanks
  • Pressurised pipelines and reactors