X
  • No products in the list

DIELECTRIC FITTINGS

Dielectric Fittings by SuperlokUSA®

SuperlokUSA® dielectric fittings are engineered to prevent galvanic corrosion and electrical conductivity between dissimilar metals in pipeline and fluid systems. These fittings are essential for isolating system components in gas distribution, process instrumentation, and fluid control applications safeguarding sensitive equipment from stray currents, voltage bleed, and long-term degradation.

Each dielectric fitting is machined from corrosion-resistant alloys and high-grade thermoplastics to maintain electrical isolation while preserving mechanical strength under pressure. Superlok uses sanitary stainless steel fittings for metal components, paired with precision-formed insulators such as PEEK and PTFE for dependable long-term performance. These materials deliver high resistance to chemicals, UV, and extreme temperatures without compromising system reliability.

Request a quote today or call (805) 658-2043 to spec SuperlokUSA® dielectric fittings for your next isolation-critical system.

With pressure ratings up to 5000 psig (344 bar) and electrical resistance of 10⁶ ohms at 10V DC, these fittings perform in high-pressure systems where both mechanical and electrical isolation are required. Temperature tolerances range from –40°F to 200°F (–40°C to 93°C), making them adaptable to challenging environments across oil and gas, chemical processing, and energy infrastructure.

Superlok dielectric fittings are available in several formats, including gaugeable tube ends, NPT threads, and compression ends. They integrate cleanly into systems requiring precise fluid control, electrical safety, and mechanical reliability. Whether used in monitoring stations, natural gas pipelines, or systems adjacent to clean-in-place instrumentation, these fittings reduce failure risk and extend equipment life.

Swagelok® Dieectric Fittings by Superlok

Swagelok® dielectric fittings have long been a trusted choice for protecting systems from galvanic corrosion and stray electrical current. But when price, lead time, or flexibility becomes an issue, Superlok offers a fully compatible alternative engineered for performance, safety, and long-term reliability.

Superlok dielectric fittings are precision-built to match Swagelok® form and function, using corrosion-resistant alloys and sanitary stainless steel fittings to ensure chemical resistance, mechanical strength, and durability in harsh operating environments. They’re used across oil and gas, water systems, chemical processing, and fluid handling industries anywhere electrical isolation is needed between dissimilar metals.

With pressure ratings up to 5000 psig and electrical resistance of 10⁶ ohms, these fittings are trusted in demanding pressure systems that require both mechanical sealing and electrical protection. Internal components are built from high-performance insulators like PEEK and PTFE, designed to hold up under extreme temperature shifts and fluid conditions without breaking down.

Superlok’s dielectric fittings line is ideal for teams seeking precise fluid control without the risk of stray current, and they integrate cleanly into both new builds and retrofit applications. They’re also readily available across North America offering fast shipping, reliable inventory, and real-world cost savings without compromising your specs.

Swagelok® Alternate Parts Near

SuperlokUSA® dielectric fittings are designed to match the similar form, fit, and sealing function as Swagelok® and Parker® equivalents, making them fully interchangeable without compromising performance. From dimensions to thread construction, every fitting meets ASME B1.1 tolerance specs, ensuring a precise fit and consistent sealing across fluid control and pipeline systems.

Our dielectric fittings use corrosion-resistant alloys and sanitary stainless steel fittings to maintain long-term reliability in high-pressure systems. Each component is engineered to deliver electrical insulation and mechanical strength ideal for preventing galvanic corrosion and stray current in mission-critical environments like natural gas, chemical processing, and utility infrastructure.

For customers in your area and the greater Northeast, Superlok provides fast access to these trusted Swagelok® alternatives backed by SGS intermixability and interchangeability testing. You get the compatibility you need without inflated lead times or costs.

Find the Right Superlok Part in Seconds!
Enter a part number to instantly find Superlok alternatives to Swagelok®, Parker®, HyLok® and other fluid system brands

Installation & Maintenance Best Practices

Superlok dielectric fittings stress insulator alignment during setup to maintain electrical isolation in high purity sanitary stainless steel pipelines. Chamfer metal ends to 45° with deburring tools, achieving Ra under 20 micro-inches for contaminant-free junctions. Mount fittings horizontally via insulators level to 0.4° to promote drainage and avoid galvanic pockets.
Purge with dry nitrogen post-install for four volumes, measuring resistance above 10^8 ohms with megohmmeters. In sanitary uses, opt for PEEK-insulated models for chemical tolerance, attesting no migration via conductivity under 1 µS/cm. Annual reviews use insulation testers for breakdown below 0.01 scc/min, scanning housings for cracks over 0.0008 inches.
These tactics amplify fitting uptime to 40,000 hours, expediting rollouts in oil and gas lines and water treatment. Data logging cuts downtime by 32%. Isolation and purging mandate secure, non-conductive performance universally.

Quality & Standards Compliance

Machined from 316 stainless steel per ASTM A312, offering over 70 ksi tensile and ductility beyond 28% for endurance in isolated flows. Batches secure PMI through LIBS analysis, affirming phosphorus under 0.04% for PREN above 22 in saline media.
Electropolishing hits Ra 18 micro-inches, probed for 400-hour humidity per ASTM D2247 sans tracking on metals in damp utilities. Fabrication in ISO 14644 Class 7 zones caps ions below 18 ppm, tailored for high purity fluid processors.
This system crafts fittings for 16-year isolation in pipelines and process skids, outpacing norms for galvanic protection in fluid systems. Audit trails support UL and SEMI reviews from headers to unions. Design accuracy spurs superior separation.

Frequently Asked Questions

What materials are these machined from?
Superlok dielectric fittings employ 316 stainless steel builds for robust corrosion resistance, per ASTM A312 with low sulfur under 0.005% to minimize inclusions in brackish flows. PEEK or PTFE insulators provide electrical separation, suiting chemical injection lines with dielectric strength above 10^6 V/mil.
Superlok tees rate to 5,000 psig ambient for 1/4-inch, derating to 2,500 psig at 350°F via ASME B31.3 curves for reliable retention under cycling. Branch arms sustain 3,500 psig non-shock, with caps at 4,000 psig and delta-P up to 500 psi without insulator failure.
Superlok fittings conform to Swagelok®, Parker®, and Hy-Lok® geometries, featuring NPT per ASME B1.20.1 and insulator profiles with matching tolerances for drop-in upgrades. This enables hybrid setups sans added resistance, maintaining isolation above 10^7 ohms in multi-vendor pipelines.
Assess nominal bore by ID and insulation needs, consulting Superlok charts for configurations balancing flow and separation efficiency. For high purity fluid processors, pick PEEK types to hold resistance above 10^8 ohms, ensuring no stray currents in water treatment skids.
In-stock assemblies ship next-day from hubs, supporting rapid deployment for standard NPT and compression ends. Custom insulators or alloys take 2-4 weeks, expedited to 4-7 days via priority for urgent oil and gas repairs.
Affirmative, Ra 15 micro-inch electropolished housings ensure <0.5 particles per ml per ISO 14644 Class 6 for pharma utilities. They endure 120+ CIP runs without dielectric loss, with leachables below 15 ppb for biocompatible fluid paths.
Keep in dry cabinets at 45-75°F, humidity <45%, apart from metals to shield insulators from scoring during hold. Vacuum-purged bags with desiccants enable years of standby, pre-use resistance checks confirming >10^6 ohms integrity.
1/8-inch NPT on housings: 18 ft-lbs snug, re-torqued post-test to verify no shorts at 1.5x pressure. 3/8-inch up to 70 ft-lbs with multipliers, avoiding insulator crush in assemblies under thermal swing.
Superlok insulators withstand -250°F with dielectric toughness >30 kV/mm for cryo-lines per ASTM D149. Validation upholds separation, with derates under -200°F preventing cracking in subcooled LNG feeds.

Industry Leaders Using Superlok

Dielectric fittings are critical components in industries where galvanic corrosion, stray current, or electrical conductivity between dissimilar metals can compromise system integrity. Superlok dielectric fittings are used widely in oil and gas, water treatment, chemical processing, and power generation anywhere fluid systems need electrical isolation without sacrificing performance.

Engineered with corrosion-resistant alloys and sanitary stainless steel fittings, Superlok’s dielectric products are built to withstand the toughest environmental conditions. Whether you’re managing high-pressure systems, navigating chemical compatibility, or requiring electrical insulation in piping or instrumentation lines, these fittings deliver uncompromising reliability.

Each component is precision-machined to meet clean in place instrumentation standards and support hygienic fluid processors. Their high-integrity seals and non-conductive barriers help maintain sterile conditions and prevent voltage interference across sensitive equipment. That’s why they’re trusted in both harsh industrial plants and finely tuned lab environments.

Superlok dielectric fittings also support fast field installation with minimal downtime. Available in a variety of sizes and connection types, they offer precise fluid control and meet demanding application specs across North America. Whether you’re replacing Swagelok® components or building out a new system, Superlok provides a cost-effective, reliable alternative with proven interchangeability.

Superlok Advantage

Largest Inventory of Union Fittings that is always In-Stock

SuperlokUSA stands out as a leading provider of Superlok fittings, maintaining the largest inventory in the United States, ready to ship anywhere nationwide. This extensive stock ensures quick delivery and minimal downtime for customers, making it a significant advantage over competitors like Swagelok®. With Superlok USA's commitment to accessibility and efficiency, businesses can rely on timely solutions for their fluid and gas system needs. This ready-to-ship capability, combined with Superlok's high-quality, cost-effective fittings, positions Superlok USA as a top choice for industries seeking reliable and responsive alternatives to Swagelok® fittings.

Fast Delivery anywhere in the USA

SuperlokUSA offers a distinct advantage with its fast delivery service across the United States, ensuring customers receive their orders promptly to minimize project delays. Through strategic partnerships with shipping providers, Superlok USA provides special negotiated rates, making their high-quality fittings not only reliable but also cost-effective to transport. This combination of speed and affordability sets Superlok apart from competitors like Swagelok®, where delivery times and shipping costs can be less predictable. For businesses seeking efficient and budget-friendly solutions, Superlok USA’s fast delivery and competitive shipping rates make it a preferred choice for fluid and gas system needs.