Standard fitting A
Standard fittings Series A are the most common for rigid or removable pipe connections. Available in various shapes (elbows, sleeves, reducers, tees, crosses, flanges), they come in brass, steel, stainless steel, or plastic. Used in hydraulic, pneumatic, gas, and industrial systems, they ensure wide availability and interchangeability under ISO, DIN, and UNI standards. Sealants may be required for proper sealing.
Fittings series B
Series B compression fittings with double ferrule (bicono) use two rings tightened by the nut to grip the tube and ensure sealing, without welding or threading. They are reusable, reliable at high pressures, and made of brass or stainless steel with possible anti-corrosion coatings. Applications include pneumatic and hydraulic systems, gas lines, and industrial instrumentation.
Fittings series C
Series C push-in fittings allow quick connection of plastic tubes (PU, PE, PTFE, nylon) directly into the fitting, with a steel ring securing the tube and a seal ensuring tightness. Made of brass or technopolymer, they enable tool-free assembly and disassembly, ideal for flexible tubing. Widely used in pneumatic systems, compressed air, automation, and small fluid distribution. Not suitable for very high pressures or metal pipes.
Fittings series D
;Series D fittings in OT 58 brass, with maximum pressure of 261 psi / 1800 KPa / 18 bar.