Circular sight glass fitting type 318 nominal pressure 2.5 For welding in or on similar to DIN 28120

The classic 'half moon' version for combined sight and light glassSuits Lumiglas Sight Glass Fitting, circular DIN 28120 or similarNominal dia: DN 50 to DN 200Power: depending on type 5 W to 15 W LEDMax. permissible ambient temperature measured at cable entry gland: 45°CConnection voltage see data shee

The method of sizing:   DiameterD [mm] Widths [mm] Pressure[bar] Notes 24 10 150 disc special size 30 12 150 disc special size 15 200 disc special size 31,6 12,75 150 disc special size   Aluminosilicate 33 14 150 disc special size 33,12 15,95   Aluminosilicate 34 17 200 disc special size   Aluminosilicate 35 7 25 disc special size 40 10 40 disc special size 12 50 disc special size 44 10 40 disc special size 12 50 disc special size 45 10 40 acc. DIN 7080 12 50 acc. DIN 7080 50 10 25 acc. DIN 7080 12 40 acc. DIN 7080 55 6,5 6 disc special size 10 25 disc special size 60 10 16 acc. DIN 7080 12 25 acc. DIN 7080 15 40 acc. DIN 7080 20 95 disc special size 63 8 8 disc special size 10 16 acc. DIN 7080 12 25 acc. DIN 7080 15 40 acc. DIN 7080 65 10 12 disc special size 15 40 disc special size 70 12 16 disc special size 15 25 disc special size 75 12 16 disc special size 80 10 10 disc special size 12 16 acc. DIN 7080 15 25 acc. DIN 7080 20 40 acc. DIN 7080 86 12 10 disc special size 90 10 8 disc special size 92 10 8 disc special size 94 12 10 disc special size 95 10 6 disc special size 15 16 disc special size 100 10 7 disc special size 12 10 disc special size 15 16 acc. DIN 7080 20 25 acc. DIN 7080 25 40 acc. DIN 7080 105 15 16 disc special size 110 12,5 10 disc special size 20 25 disc special size 113 15 10 disc special size 115 15 10 disc special size 120 10 4 disc special size 15 10 disc special size 18 16 disc special size 125 15 10 acc. DIN 7080 20 16 acc. DIN 7080 25 25 acc. DIN 7080 30 40 disc special size 130 15 10 disc special size 135 15 8 disc special size 25 25 acc. DIN 7080 140 15 8 disc special size 150 10 2 disc special size 15 8 disc special size 20 10 acc. DIN 7080 25 16 acc. DIN 7080 30 25 acc. DIN 7080 160 20 12 disc special size 170 15 5 disc special size 20 10 disc special size 175 20 10 acc. DIN 7080 25 16 acc. DIN 7080 30 25 acc. DIN 7080 200 20 8 acc. DIN 7080 25 10 acc. DIN 7080 30 16 acc. DIN 7080 210 25 10 disc special size 250 20 4 disc special size 25 8 acc. DIN 7080 30 10 acc. DIN 7080 265 30 8 acc. DIN 7080   Note: if in the column Notes otherwise stated, borosilicate glass "extra hard" is used Round sight glasses are delivered separately or in a set with gaskets and mica shield. If you can not find the size - please contact us. Tolerances Diameter (d1):d1 ≤ 125 mm125 mm < d1 ≤ 200 mm d1 > 200 mm  ± 0,5 mm± 0,8 mm± 1,0 mm     Thicknes (s):s ≤ 20 mm s > 20 mm  + 0,5 mm / -0,25 mm+ 0,8 mm / -0,40 mm  Flatness (e):d1 ≤ 100 mm100 mm < d1 ≤ 150 mm 150 mm < d1 ≤ 200 mmd1 > 200 mm 0,05 mm0,08 mm0,12 mm0,15 mm    Parallelity (p):d1 ≤ 100 mm100 mm < d1 ≤ 200 mm d1 > 200 mm 0,20 mm0,25 mm0,30 mm Calculation of the glass thickness s - theoretical minimum glass thicknes [mm] dm => (d1+d2)/2 => average sealing diameter [mm]d1 - glass and sealing outside diameter [mm]d2 - sealing inside diameter [mm]p - permisible presure [bar] δbB - min. value of surface comressive stress [N/mm2] S - safety factor        Our offer includes sight glasses made of various materials, depending on environmental conditions (temperature, pressure, aggressive media). The properties of various glass materials are described on page Types of materials in chapter Our offer/Technical glass. The basic types of materials used for the manufacture of sight glasses are: soda-lime glass - widely available, cheap, working temperature up to 280 °C,  borosilicate glass - particularly suitable for use in aggressive environments (acids, alkalis, water vapor), working temperature up to 350 °C, aluminosilicate glass -  working temperature up to 660 °C, glass-ceramics - thermal shock resistant, working temperature up to 750 °C, quartz glass - with a broad spectrum light transmittance (from ultraviolet to infrared), working temperature up to 1100 °C, sapphire products - working temperature up to 2000 °C. To improve the strength, the machined glass is subjected to toughening and annealing. In order to increase the resistance of sight glasses on the aggressiveness of the working environment and in the use of high temperatures and pressures, additional use of mica shield is recommended. Mica disc working as shields are described here.  If you need this solution - please contact us. Round sight glasses are delivered separately or in a set with gaskets. Gaskets for sight glasses are described here. We offer sight glasses manufactured by leading brands such as: Spectraglass, Klinger or Maxos, which guarantees high quality and stability of parameters.   Safety precautions when using sight glass discs: Whenever a sight glass assembly has been taken apart it is urgently recommended in accordance with DIN 7080/ DIN 8902 that the glass disc and gaskets are replaced by new ones. That is particularly important in the case of pressure vessels and/or aggressive media. The following extract from DIN 7080/DIN 8902 text is verbatim: Sight glass discs may only be installed by personnel who have been informed fully about the following requirements: care in handling sight glass discs cleaning of recesses, sight glass discs, gaskets and other parts i. e. removal of foreign bodies (e. g. swarf), prior to installation/reassembly even tightening of retaining bolts Sight glass discs that have been removed after operating use must not be re used. Planned maintenance:Sight glass discs should be included in routine maintenance and periodically checked visually or using ultrasound wall thickness measuring means. In the event of damage, a glass disc must be promptly exchanged, with the plant first having been brought to a standstill. The service life of a sight glass, relative to the particular vessel in which it is mounted, should be established by regular and careful visual check of its condition.Caution: Completely demineralised water may dissolve glass – especially intensive periodical inspection required! Breakage of a sight glass:In spite of careful installation and recommended use, sight glass discs can, on rare occasions, suffer breakage through external influences. In order to prevent the entry of glass particles into products of a critical nature, e. g. foodstuffs, appropriate safety precautions should be taken by the plant manufacturer or user.  

Sight Glass Wiper SWI Simple effective assembly for wiping clean circular sight glass discs Maximum pressure 6 bar Combine with circular sight/light fittings There is also a wiper in "L" version, in which the wiper blade is only on one side of the axis (half of the "T" version) All contact parts stainless steel, Hastelloy on request Sight Glass Wiper SWII Effective assembly for wiping clean glasses in sight glass fittings DIN 28120 - DN 100 to DN 200 Pressure rating same as whole fitting up to 16 bar All contact parts stainless steel Supplementary elements  Spray Device Use to jet spray water, inert gas or other fluid to maintain glass visibility No interference with viewing area All contact parts min. 1.4571 or other Spray Device Use to jet spray water, inert gas or other fluid to maintain glass visibility Installed on side glass flange All contact parts min. 1.4571 or other Easy installation even on an existing sight glass We also recommend: Ex Motor Drive EMA I-Ex EEx d IIC T5 Versatile, high-performance Ex-class motor drive with compact dimensions for numerous applications The Ex-class motor drive is mainly intended for operating wipers on sight glasses and is suitable for short- or long-term operation. Especially in environments that require the remote monitoring of processes in reactors Compact overall size; high turning moment; excellent motor power; low energy consumption. Approved for use in potentially explosive environments, Zones 1 and 2 as well as 21 and 22 Approved for use in ambient temperatures of between -20°C and +50°C Terminal connection and motor enclosure IP68, motor shaft IP54

Material: Cover flange: 1.4571 (factory standard) Base flange: 1.4571 (factory standard) Steel on request Glass:  borosilicate glass acc. to DIN 7080 Seal:  O-Ring acc. to requirements Bolts:  A4-70 Other materials on request. Shape:  similar to DIN28120 but for pressure from -1 up to +2,5 bar Nominal sizes:  DN50 to DN400 (larger sizes on request) Nominal pressure: from -1 up to +2,5 bar Temperature: depending on gasket selection Other: Special designs/options a) with wiper type SWIb) with spraying device type SV1c) double glazingd) double glazing + heating elemente) with LED or halogen luminaires, also ATEX-certifiedf) high-temperature version with quartz glassg) plexiglas impact protection window (5mm)h) other special designs on request SHORT DESCRIPTION - ROUND TANK SIGHT GLASSES TYPE 318V (similar to DIN 28120) Our round tank sight glasses type 318V, like our other tank sight glasses, are welded to or in tank walls to allow observation or illumination of the tank interior. ACI tank sight glasses type 318 have been designed based on DIN 28120 for vacuum applications up to an operating pressure of 2.5 bar. A sight glass made of chemically highly resistant borosilicate glass DIN7080 is clamped between two high-quality stainless steel flanges and thus forms an almost maintenance-free inspection opening. The vacuum is sealed on the media side by means of sealing rings. Compared to the DIN 28120 design, our Type 318V is considerably flatter and lighter. Due to the use of hexagon head screws, it has significantly fewer protruding edges, which greatly reduces the space required for the sight glass holder. The Type 318V therefore perfectly fills the application range between our Type 317 for pressureless operation and the more solid Type 320 according to DIN 28120. The fitting is sealed with O-rings or sealing rings in accordance with DIN 11851, which can be selected from an extensive range of materials such as PTFE or Teflon, NBR, EPDM or silicone. Should the maximum operating temperature not meet your requirements, or should the process conditions present a problem even for the highly resistant borosilicate glass, there are possibilities (depending on the vacuum) to also work with flat sealing systems. Like other of our sightglasses, the type 318V can be equipped with wipers type SWIor lights. Read on to learn more technical details of our Type 318V!  

Material: Base flange and cover flange: RSt 37-2, H II, C 22.8, P250GH, P265GH, 1.4306 (F304L), 1.4404 (F316L), 1.4462 Duplex (F51), 14539 (Alloy 904 L), 1.4541 (F321) , 1.4571 (F316Ti) or according to customer specifications Sight glass:  borosilicate glass acc. to DIN 7080 Soda-lime glass acc. to DIN 8902 Seal:  Klingersil or as desired Screws:  A4-70 Shape:  according to DIN 28120 Nominal size: DN25 - DN250 Nominal pressure:  PN 10/16  (depending on size and material composition) Temperature:  with soda lime glass up to max. 150 ° C with borosilicate glass up to max. 280 ° C  with borosilicate & mica shield up to 320 ° C Higher operating temperatures on request Options:  Optional versions are possible.   Special construction/options: With wiper blades SWI or SWII With spray nozzle SV1 Double glass Double Glass with heating element With LED or halogen lights, ATEX certification available With protective coating, variant B of DIN 28120 With O-Ring seal High Temperature Version with quartz window Impact protection plexiglass shield More special constructions available on request   DN Da Di h1 h2 s kg Nm 25 115 48 16 25 10 2,9 30 40 150 65 16 30 12 5,0 55 50 165 80 16 30 15 6,0 55 80 200 100 20 30 20 10,3 55 100 220 125 22 30 25 11,5 55 125 250 150 25 30 25 15,2 64 150 285 175 30 36 30 23,5 107 200[1] 340 225 35 36 30 30,7 125 250[1] (similar to DIN) 395 280 40 40 45 44,6 107   [1] PN 10 only   Use our 360° 3D view to get a perfect allround look at our product. SHORT DESCRIPTION - TANK SIGHT GLASSES TYPE 320 ACCORDING TO DIN 28120 The ACI Tank Sight Glass Type 320 is a round tank sight glass to be welded on or into the wall of a pressure vessel. Type 320 is manufactured in full accordance with the construction rules of DIN 28120 and suitable for an operating pressure of PN10 or PN16. Due to DIN conformity Type 320 can easily be installed as a spare part for existing fittings complying with DIN 28120. Our tank sight glass fulfils all standard conditions including full vacuum compatibility and an operating pressure of up to 16 bar. Operating temperatures of up to 280°C are well within range of type 320. If a mica protection sheet is added, safe Operation at up to 300°C is possible! Of course, you can order matching mica sheets directly with your sight glass! Expaning upon the definitions of DIN 28120, we can offer Type 320 with special sizing of DN250 and larger, as well as high temperature compatible quartz windows and of course matching gaskets. Although these variants are not listed in the standard documents, design and manufacturing closely follows the regulations provided in DIN 28120 and DIN 7080, so the stated operating conditions can be completely relied upon. As for all our round tank sight glasses, our type 320 is optionally available with spray nozzles SVI, wipers of type SWI or type SWII (with flexible shaft) or light fixtures with LED or Halogen lights. You can find additional technical data, detailed descriptions and contact information further down on this page!