Drexelbrook Dual-Seal Approval – Added Protection Now Available

June 17, 2010

What is it?

Basically, it’s a pipe extension permanently mounted on the back end of a sensor with a rupture disc. Should the sensor's primary seal fail, the process pressure and material might leak through the sensor's primary gland seal. The Dual Seal assembly prevents leakage from entering the electronics housing and subsequent wiring runs. The increased pressure due to the leakage will blow out a rupture disc that is rated for 110 psig, indicating that the primary seal may have been compromised. The Dual Seal has a threaded customer connection to allow them to connect and capture any possible leakage. Click here for a drawing.

Where is it used?

• The Dual Seal has become a must for sensors installed in Canada, as regulated by the Canadian Electrical Codes.
• Additionally, dual seal sensors can prevent hazardous situations, should for any reason the sensor’s primary process seal leak.

Situations where a sensor’s primary seal has leaked have occurred, and hazardous materials or gases have leaked into the electronics, or back to the control room via the conduit piping connections, where seal fittings have not been used. This potentially hazardous event can now be eliminated via the new dual seal sensor designs.

RF Continuous Level Systems:

The Dual Seal has been FM & CSA agency approved, for immediate use, with many of the most commonly used RF sensors, and can be added as a separate line item, which would be completely assembled at the factory prior to shipment.

Other RF systems (Integral or Remote) that can accommodate the Dual Seal options are:

• RCT
• Universal III
• Universal Lite
• LCS/LCT/LCT3 for DumpStar systems

Click here for a brochure .