METAGLAS® Type 901 — Dead-Zone-Free Flush Wall Sight Glass
The METAGLAS® Type 901 is a precision-engineered, flush-wall sight glass designed for installation on
base flanges similar to DIN 28117. Its dead-zone-free sealing concept eliminates product hold-up areas,
ensuring complete drainability and hygienic integrity in sanitary and process-critical applications.
Design & Construction
Interface: Base flanges similar to DIN 28117 (flat-face mounting)
Seal Design:Dead-zone-free, flush wall seal for full CIP/SIP compliance
Body Material: Stainless steel (1.4404 / 316L) as standard — other alloys on request
Surface Finish: Polished / electropolished for hygienic applications
Sealing Medium: O-ring or gasket to suit process conditions (EPDM, FKM, PTFE etc.)
Pressure / Temperature: Dependent on size and material — technical data available on request
Applications
Pharmaceutical and bioprocess equipment with flush vessel interfaces
Food & beverage processing vessels requiring drainability and clean-in-place design
Chemical reactors and mixing vessels with sterile design specifications
Inspection ports for aseptic processing lines and tanks
Key Advantages:
Dead-zone-free flush seal ensures no product residue or contamination risk
Metal-fused glass for maximum mechanical and thermal integrity
Fully CIP/SIP compatible for hygienic and aseptic systems
Low profile design for easy integration into vessel walls and pipe runs
Built for precision visibility and long-term process reliability
Specify DN size, media type, pressure/temperature envelope, and seal material when ordering.
John Moncrieff Ltd will supply the METAGLAS® Type 901 sight glass configured to your process and compliance requirements.
