Butt-Weld Tubular Sight Glass with Slotted Stainless Steel Shroud

An inline sanitary butt-weld tubular sight glass enclosed by a cylindrical stainless steel protective shroud with elongated viewing slots around a replaceable tempered glass tube. Offered in SS304 and SS316L across 1/2"–4".

Body & Cover Material	SS304 / SS316L (AISI 304 / AISI 316L Protective Sleeve)
End Connection	Butt-Weld Ends
Body Construction	Tubular Sight Glass with Slotted Stainless Steel Protective Shroud
Nominal Size Range	1/2"–4" (DN25–DN100)
Referenced Drawing Standard	DIN

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Butt-Weld Ends and Slotted Stainless Steel Protective Cover

This welded tubular sight glass surrounds its replaceable tempered glass cylinder with a machined AISI 304/316L stainless steel sleeve featuring four axial viewing slots and internal tie fasteners. The slotted stainless cover shields the glass tube against external knocks while keeping the flow path visible from multiple angles.

Size Range and Embedded DIN Weld-End Reference Drawing

The specification table covers nominal sizes 1/2", 3/4", 1", 1.5", 2", 2.5", 3", and 4". Note that the embedded DIN sight glass weld end drawing in the series documentation lists sizes 25 to 100 (bore A 25–100 mm, weld OD B 28–104 mm, flange OD C 79.0–159 mm, length D 136–152 mm) on a tie-rod diagram rather than the slotted shroud shown in the product photos.

Material Grades and Gasket Options

CNC-lathed from SS304 or SS316L stainless steel, the assembly uses VMQ (silicone), EPDM, Viton, or PTFE gaskets (source-claimed tempered glass rating up to 10 bar) for food, dairy, beverage, meat processing, vacuum, pharmaceutical, and chemical pipelines.

Pre-Weld Disassembly and Ordering Guidance

Disassemble the shroud and remove the tempered glass cylinder and elastomer seals prior to welding the end connections into the line. Specify tube OD standard and any required heat numbers or MTR certificates when ordering.