Circular Sight Glass Fittings Type 318V - PN 2.5
For vacuum applications
Tank Sight Glass Type 318V PN 2.5
Our round tank sight glasses type 318V are welded on or in vessel walls to allow observation or illumination of the inside of the vessel. ACI tank sight glasses type 318V are designed based on DIN 28120 for vacuum applications up to -0.9 bar(g) and for an operating pressure of 2.5 bar(g). A sight glass made of chemically highly resistant borosilicate glass DIN 7080 (or similar) is clamped between two high-quality stainless steel flanges and proven quality seals. The vacuum is sealed on the media side by means of sealing rings.
Compared to the design specified in DIN 28120, our Type 318V is significantly thinner and lighter. With the gaskets specially designed for vacuum applications, the Type 318V is a cost-efficient alternative for low operating pressures and therefore perfectly fills the application range between our type 317 for pressureless operation and the more solid type 320 variant.
Despite the lower requirements, compared to DIN 28120, our tank sight glasses of type 318V are made of the same high-quality stainless steel 1.4571 (316Ti) that our customers have appreciated for years. The glass material used is borosilicate glass 3.3 to DIN 7080 (or similar), which has proven itself in the industry. The valve is sealed with sealing rings according to DIN 11851 from a wide range of materials such as PTFE (Teflon®), NBR, EPDM or silicone, which are adapted to vacuum applications.
Should the process conditions pose a problem even for the highly resistant borosilicate glass, an FEP or mica protective screen specially adapted to the fitting offers additional protection against steam and aggressive chemicals, such as alkalis up to a pH value of 14.
More technical details about our tank sight glass type 318V can be found in the data sheet or in the product video.
² limited by gasket
³ depending on environmental variables
¹ Optional materials:
1.0460 / 1.4301 / 1.4307 (F304L) / 1.4404 (F316L) / 1.4410 (Super Duplex) / 1.4435 (F316L) / 1.4462 (F 51) / 1.4529 (Alloy 926) / 1.4539 (Alloy 904L) / 1.4541 (F321) / 1.4547 (F44) / 1.4550 (F347) / 1.4571 (316Ti) / 1.4828 / 1.4841 / 1.4876 ( Alloy 800H) / 1.4878 / 1.7335 / 2.4068 (Alloy 201) / 2.4360 (Alloy 400) / 2.4375 (Alloy K500) / 2.4602 (Alloy C-22) / 2.4605 (Alloy 59) / 2.4610 (Alloy C-4) / 2.4816 (Alloy 600) / 2.4819 (Alloy C-276) / 2.4856 (Alloy 625) / 2.4858 (Alloy 825) / 3.7035 (Titan)