Dielectric Fittings
Dielectric fittings isolate monitoring instruments from the effects of electrical current. Installed on impulse lines ahead of monitoring stations in natural gas pipelines, the fittings interrupt cathodic current flow while permitting full fluid flow.
The fitting design is unique in that it separates the two primary functions of electrical insulation and fluid containment. Thermoplastic insulators provide high dielectric strength over a wide range of operating and climatic conditions. A fluorocarbon FKM quad seal contained in the fitting provides the primary fluid seal.
Features
■ Metal components are machined from 316 stainless steel for use in rugged environments.
■ Molded thermoplastic insulation with excellent electrical, chemical, and ultraviolet resistance and low water absorption maintains dielectric strength and integrity over a wide range of operating and climatic conditions.
■ Gaugeable Swagelok® tube fitting or tapered pipe thread end connections (NPT/BSP) provide direct connection to tubing or piping system.
Materials
Body: 316 stainless steel
Insulators: Polyamide-imide
Quad Seal: 70 durometer fluorocarbon FKM
Backup Ring: Virgin PTFE
Technical Data
Electrical Resistance of Insulators at 70°F (20°C):
10 106 at 10 V (dc)
Pressure Rating: 5000 psig (344 bar)
Temperature Rating: –40 to 200°F ( –40 to 93°C)
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