JW Winco, the standards parts specialist, is continuing to expand its selection of AISI 316L (A4) stainless steel components, including threaded and magnetic plugs. The new Fluid Fill / Drain Plugs (GN 742.5) follow the established level of technology — plus, they’re made of AISI 316L (A4) stainless steel.
These plugs are available for thread from M14 to M33 and G1/4 to G1 and are intended for especially corrosive environments, such as offshore applications or situations with heavy exposure to salt or brine.
The screws have an embedded seal of fluorine rubber that’s secured against loss or overloading. To minimize errors, they also have icons on the front side that clearly indicate whether the opening is for filling or draining.
The magnetic plugs GN 738.5 look similar except for an integrated bar magnet that extends into the fluid to reliably capture any iron particles that could damage gears or the like.
For the same area of application, JW Winco is also introducing fluid sight glasses (GN 7440) as a premium addition to the longstanding variants of aluminum, brass, and plastic. GN 7440 offers not only the corrosion resistance of AISI 316L (A4) stainless steel but also another special new feature — the glass sight glass is inserted into the stainless steel body using a special thermal process.
During cooling, the glass shrinks to create a hermetic and absolutely tight seal. In fact, the level of pretensioning makes it nearly indestructible. This allows the oil sight glass to withstand even high pressures. Burst tests have shown, depending on the temperature, that the parts only fail at pressures above 400 bar. Thanks to the FPM seal, temperatures up to 356° F (180° C) are no problem. With a copper seal, even temperatures as high as 572° F (300° C) are withstood.
Notches integrated into the chemically resistant glass give reliable indication of the current liquid level. GN 7440 improves operational reliability since its sight glass will not burst spontaneously. It signals overloading with the formation of easily discernible small cracks, which allows time to replace the oil sight glass before it fails entirely.