The conical thread of GN 743.8 fluid sight glasses makes a metallic seal possible. When tightened, the conical external thread R wedges itself within the corresponding internal thread Rp.
At the reference level “a”, the external thread has the same thread diameter as the internal thread, so that it can be fastened in by hand up to “a”. The tightening with a tool increases the screw-in length and seals the screw connection. In addition, a sealant (fibrous or teflon tape) is usually used. The ”R” thread is “roughened”, so that the sealant does not shift when screwing in.
These fluid sight glasses can also be used on pressurized tanks. Tests regarding maximum pressure are available.
ESG safety glass
Temperature resistant up to 356 °F (180 °C)
Rubber FPM (Viton®)
Identification by non-black coloring of the seal
This article is RoHS-compliant in application of Annex III., which means it complies with EU Directive 2011/65/EU, including extension (2015/863/EU), for restricting the use of certain hazardous substances in electrical and electronic devices. The Directive regulates the use of hazardous substances in devices and components. The implementation in national law is summarily described with RoHS(Restriction of (the use of certain) hazardous substances)).
Weight: 0.041 lbs
If weight is not listed, please contact our Sales Department for additional information regarding weight. Phone: 800-877-8351