Duolok tube fittings consist of four precision-machined components: body, front ferrule, back ferrule, and nut. During make-up, the double-ferrule design, with the staged sequential swaging action of the ferrules, compensates for the variation in tubing materials, hardness, and thickness of the tube wall to provide leak-tight connections in an extensive range of applications.
316 stainless steel fittings are manufactured from cold-finished bar stock in accordance with ASTM A-276 and ASTM A-479. Elbows, tees and crosses, are machined from close-grained 316 stainless steel forgings in accordance with ASTM A-182. All components are heat code traceable with certified material test reports (CMTRs) available on request. More information about other materials.
Duolok tube fittings are completely assembled and individually bagged to assure the highest levels of quality and cleanliness. The protective bags eliminate contamination (tubing burrs, dirt, etc.). They are packaged in convenient, small-lot quantities for easy procurement and handling. Box labels are color-coded according to the tube fittings' material. Labels include the part number, material, product description and picture of the product.
NPT thread and BSP tapered thread fittings are availabe with factory installed high-quality teflon tape. Factory-taped fittings reduce costs and ensures that threads are properly taped for more leak-tight installations.
Duolok tube fittings are manufactured in accordance with SSP's Quality System, which has been certified to conform to the ISO 9001:2000 Quality Standard. In addition, all fittings are manufactured to the technical design specifications and rigid quality control standards of the SSP Instrumentation Division. SSP's continuing commitment to quality is reflected throughout the company in its personnel, policies, equipment, products and service.
SSP offers tools and accessories to support tube fitting assembly and installation and tube cutting, preparations and bending.