Circular sight glass fitting type 321 DIN 28121 PN 10/25 for flange mounting

Material: Base flange: carbon steel / 1.4541 (321) / 1.4571 (316Ti) / 1.4404 (316L) / 1.4306 (304L) / 1.4539 and many more Cover flange: carbon steel / 1.4541 (321) / 1.4571 (316Ti) / 1.4404 (316L) / 1.4306 (304L) / 1.4539 and many more Sight glass: Borosilicate glass DIN 7080 (up to 200°C) Gasket: PTFE enveloped gasket (up to 200°C) Shape: similar to DIN 28121 Nominal size: DN40 to DN200 Operating pressure: max. 20 bar -for higher pressures see type 322 Temperature: Tmax. 200°C For higher temperatures see Type 323 Gasket selection: PTFE enveloped gasket acc. to DIN 28121 Our round sight glasses type 321A are screwed onto flanges according to ASME B16.5 to allow for observation or illumination of the container interior. ACI sight glasses of type 321A are constructed according to DIN 28121 for operating pressures up to 20 barg. Between two high-quality stainless steel flanges and a media-side PTFE-coated corrugated gasket, a sight glass made of chemically highly resistant MAXOS® borosilicate glass DIN7080 is clamped. Since this gasket is in force shunt, the flange parts of the sight glass lie directly on top of each other and thus protect the glass plate as effectively as possible. The type 321A is delivered pre-assembled from the factory and can be screwed directly onto a flange according to ASME B16.5 without any additional effort. Should the unlikely event occur that the glass is damaged during operation, the entire fitting can be replaced with little effort. Our sight glasses of type 321A are made from high-quality stainless steels 1.4571 (316Ti) or 1.4404 (316L). As glass material, the industrially proven MAXOS® borosilicate glass according to DIN 7080 is used. The sealing in force shunt prevents settling of the gaskets, so that re-tightening of the tension screws on site is no longer necessary. The PTFE-coated gasket makes the sight glass type 321A suitable for food, acids, alkalis, and most aggressive chemicals. If the borosilicate glass DIN 7080 does not meet your requirements, or if the process conditions themselves pose a problem for the highly resistant borosilicate glass, a custom-fitted mica protection disc offers additional protection against temperature and steam. FEP or Halar® coatings additionally protect the borosilicate glass from aggressive chemicals or alkalis. Like other sight glass fittings, the type 321A can be equipped with a wiper type SGW, spraying devices SVII, or lights upon request.

Material: Base flange: 1.4404 / 1.4539 /1.4571 / 1.4541 / 2.4602 / 2.4605 / other materials on request Cover flange:  1.4404 / 1.4539 /1.4571 / 1.4541 / 2.4602 / 2.4605 / other materials on request Sight glass: Borosilicatglass DIN 7080 or Quarzglass Seal: the material is dependent on pressure and media Shape:  assembly for bolting straight onto DIN flanges Nominal size: DN40 up to DN100 Nominal pressure: PN40 / PN 63 / PN100 and PN160  higher pressures on request Temperature: max .: 280 ° C / Special versions up to 500 ° C are possible Option: Available with Lloyd's design appraisal. Optional versions are possible. Take advantage of our 360 degree 3D view for a perfect all-round view of our product.   The container sight glass type 322 for high-pressure applications is a solid fitting based on the design principles set forth in the industrial standard DIN 28121. Through the significantly reinforced flange and the use of glass plates beyond the standard dimensions of DIN 7080, it is possible for us with type 322 to achieve operating pressures of up to 160 barg. The tensioning of the glass occurs similarly to our proven type 322 through pre-tensioning screws. This ensures that the fitting only needs to be properly attached to the carrier flange in your system to achieve the necessary sealing. An execution for elevated temperatures is also feasible through the use of appropriate seals and glass materials. Due to the high operating pressure, the installation of wipers and spraying devices is unfortunately not possible with type 322. Lighting based on LED lighting elements is available from us. Should the borosilicate glass not meet your requirements similar to DIN 7080, or if the process conditions themselves pose a problem for the highly resistant borosilicate glass, a mica protective disc specifically adapted for the fitting offers additional protection against temperature and steam. FEP or Halar® coatings additionally protect the borosilicate glassagainst aggressive chemicals or caustics.

Material: Base flange: 1.4724 / 1.4762 / 1.4828 / 1.4841 / 1.4845 / 1.4571 / 2.4605 Cover flange: 1.4724 / 1.4762 / 1.4828 / 1.4841 / 1.4845 / 1.4571 / 2.4605 Glass: Quartz glass, sapphire glass Sealing: Graphit, novamica, thermex Shape:  assembly for bolting straight onto DIN EN 1092 or ASME flanges Nominal size: DN40 up to DN200 Pressure: PN10 or on request Temperature: 400°C / Special versions up to 1000 ° C are possible on request Option: Optional versions are possible. The ACI sight glass type 323 is a variation of type 321, designed for an expanded range of applications, especially at higher temperatures. They serve to observe and illuminate the interior of sealed containers (container, boilers, tanks, silos, etc.). The PTFE-coated corrugated ring gaskets typically used in type 321 are no longer reliably usable above a temperature of 200 °C. To eliminate this disadvantage, we use high-quality graphite composite seals in type 323, so that the operating range of the borosilicate glass plates according to DIN 7080 can be fully utilized up to 280 °C, or even 320 °C with a mica disc. Even at temperatures above the limits of DIN 7080, type 323 can be used without problems with untempered borosilicate glass plates up to 400 °C. For higher temperatures, please inquire. With the sealing in the force shunt, type 323 offers you the same advantages as our proven type 321. Here, too, the glass plate is best protected over the entire circumference, and the fitting can be easily installed or exchanged as a single component. The fitting is completely assembled at the factory and can, upon request, be tested for pressure resistance and tightness, so you can rely 100% on our quality. Like type 321, type 323 can also be supplied with LED lighting upon request.