Metal component with multiple threaded rods and tubular extensions, used in mechanical applications.
A stainless steel flow meter with a rectangular shape, featuring a central glass viewing area and multiple attachment bolts on its sides.
An elongated, silver container with a glass tube in the middle, surrounded by screws.
Video | Level indicator with rear Welding ends type 411 – ACI Industrie valves GmbH

Level indication type 411 PN 40

Level indicator with rear welding ends

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Delivery time on request

Level indicator with rear welding ends

Certified quality
Technical data
  • 140
  • 170
  • 220
  • 250
  • 300
  • 310
  • 350
  • 370
  • 400
  • 500
  • 600
  • 620
  • 700
  • 800
  • 930
  • 1000
  • 40
  • 80°C
  • 130°C
  • 150°C
  • 175°C
  • 180°C
  • 200°C
  • 243°C
  • 280°C

Quick overview

max. 40 barg
heat resistant up to 280 °C
for liquid media
for gaseous media
Total length
140 - 1000 mm
Custom made design possible

Cross-section
drawing

Technical drawing
Dimensions
BL V S Concealed view h kg
140 79 60 0 25 3.4
170 124 100 0 25 4.0
220 174 150 0 25 5.0
250 204 180 0 25 5.7
300 264 240 0 25 6.7
310 264 240 0 25 7.0
350 304 280 0 25 7.8
370 324 300 0 25 8.2
400 354 330 0 25 8.9
500 454 430 1x46 25 11.4
600 564 540 1x46 25 13.4
620 574 550 1x46 25 13.9
700 654 630 1x46 25 15.7
740 694 670 1x46 25 16.5
800 754 730 1x46 25 17.8
930 884 860 2x46 25 20.9
1000 954 930 3x46 25 22.8

Product information

The level indicator type 411 serves as a liquid indicator in the bypass for reliable level control in boilers and tanks. The indicator has a square flange design with two rear 20 mm welding ends.

The level indicator is equipped with a sight glass plate made of high-quality borosilicate glass according to DIN 7081. This is securely encapsulated between gaskets and tightly screwed to ensure lasting tightness and high pressure resistance.

Standardly, the sight glass type 411 is made of stainless steel 1.4571 (316Ti) - a material characterized by high corrosion resistance and durability. Upon request, the design is also available in many other materials, suitable for specific requirements and applications.

The sealing of the level indicator is done with flat gaskets customized to your needs from an extensive material range. This offers more demanding materials in addition to the common fiber material gaskets, such as PTFE (Teflon®), novaphit® MST-XP, and KlingerSil® C4400.

Important note: Reflective sight glasses cannot be combined with mica discs and coatings, as the protective mica layer prevents the necessary light refraction for reflection.

  1. Screws
  2. Cover frame
  3. Glass cushion
  4. Sight glass
  5. Gasket
  6. Base frame
  7. Welding ends
  8. Screw plugs
Disassembled mechanical assembly with bolts, spacers, and a base plate in a stack.
Portrait von Wolfgang Tackenberg
Portrait von Wolfgang Tackenberg

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Wolfgang Tackenberg
Technical Sales Manager
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Search... Your entries are invalid! Please contact us! Possible working pressure: Required thickness: Maximum temperature: This is a standard sight glass that we would be happy to manufacture for you. This is a sight glass according to DIN This is a sight glass according to DIN , which we would be happy to manufacture for you.