Hinged sight glasses

Hinged sight glasses

Hinged sight glasses that will never let you down. For decades. Under the toughest conditions.

We have a complete range of hinged sight glasses, which are used worldwide for safe process observation. Our hinged sight glasses meet the highest quality standards – according to our quality commitment “Swiss Excellence – Since 1936”.

Hinged sight glasses are a combination of an illuminated or non-illuminated sight glass with a quick-release system for rapid opening and closing of the combined unit.

Hinged sight glasses are used where a chemical process requires rapid manual addition (e.g., of a powder or liquid) or the regular or sporadic removal of samples.

The hinged sight glasses can be combined with our wipers. The illuminated hinged sight glasses are available for use in [Ex] and non-[Ex] areas.

Requirements

Our portfolio consists of two product series. Each product is configurable according to your needs. This allows us to cover all common requirements. Here is an overview of the possibilities:

Versions/ product series:

KSG: Without lighting, or without light fitting
KSGB: With lighting, or with light fitting (product series HL or (F)KEL)
Sizes/ application:

Sizes: Size 125 (with flange outside diameter of 250 mm) or size 200 (with flange outside diameter of 335 mm)
Maximum operating pressure: 1 bar (for size 125) or 0.5 bar (for size 200)
Maximum operating temperature: 150°C or 200°C (depending on the glass plate)
Materials:

Welding flange: 1.4571/ 316Ti, 1.4541/ 321, RSt 37-2/ S235
Glass plate: Soda lime/ DIN 8902 (up to 150°C), borosilicate/ DIN 7080 (up to 200°C) (others on request)
Gasket on product side: Nitrile, Perbunan®, silicone, Viton® (others on request)
Approvals:

Gaskets with FDA approval, USP Class VI, regulation (EC) No. 1935/2024, etc. (others on request)
Machining/ special tests:

Stainless steel liner (1.4404) of the hinged part (product-contact side), for [Ex] applications
Hydraulic pressure test on glass plate
Mechanical impact test on glass plate

Do you have further requirements? Please contact us at any time. We will be happy to find a solution together.

Why Max Müller?

Safety. In order to ensure the highest quality and full traceability, we only use flanges and glass plates that are made in Switzerland and Germany. Therefore, our products will never let you down.

Reliability. Founded in 1936, MAX MÜLLER has grown into one of the world‘s leading manufacturers of process observation equipment. Therefore, we will always be there for you.

Company profile/ overview

Product inquiry

We look forward to hearing from you. You can get in touch with us as follows:

Contact/ locations

Contact form

Data sheets/ downloads

		Data sheet
Without light fitting	KSG
With light fitting	KSGB

Add-ons

We have the following add-ons for hinged sight glasses:

Light fittings

High-quality light fittings and timers, made of stainless steel or aluminium, for either [Ex] or non-[Ex] applications

Wipers and motorized wipers

Central and lateral wipers for sight glasses and metal-fused sight glasses, manual or pneumatic, up to 16 bar and with vacuum