Female-Female Conical Reach Union Fitting in Galvanized Malleable Cast Iron

Female-Female Conical Reach Union Fitting in Galvanized Malleable Cast Iron

The Female-Female Conical Reach Union Fitting made of galvanized malleable cast iron is a junction and maintenance component designed to bring flexibility and durability to your piping systems. Its main feature is its hot-dip galvanizing coating, which gives it exceptional corrosion resistance , making it ideal for humid environments or outdoor applications. This three-piece fitting, equipped with a loose nut, ensures a watertight and removable connection thanks to its metal-to-metal conical reach, essential for sections of the network requiring regular maintenance or inspection.

Key Role: The Art of Easy Connection and Release

The conical span union fitting is the perfect technical solution when you need to join two pipes or two pieces of equipment (such as a valve) rigidly, while retaining the ability to effortlessly separate them later. Instead of having to loosen the entire line to make a change, you only need to manipulate the center nut. This saves valuable time during maintenance, parts replacement or network expansion, thus ensuring faster service continuity .

Corrosion-Resistant Applications and Industrial Aesthetics

The galvanized finish of this union fitting makes it particularly suitable for environments where protection against oxidation is paramount. It is widely used for the distribution of water (including drinking water systems, subject to certification verification), gases, steam , and for non-corrosive liquids and gases. It is essential in HVAC (Heating, Ventilation and Air Conditioning) systems installed outdoors or in damp rooms. In addition, its silvery and robust appearance is highly sought after for industrial furniture, where it brings an authentic vintage aesthetic and unfailing visual solidity.

Normative Compliance and Quality of Galvanizing

The manufacture of this union respects a high level of quality, in accordance with the international standards EN 10242 and ISO 49. The base material is the malleable cast iron EN-GJMB-350-10, as specified by the EN 1562 standard, which guarantees excellent mechanical robustness. The hot-dip galvanizing treatment is carried out with special care, ensuring a zinc layer with a minimum thickness of at least 70μm (micrometers). This protection is a highly effective corrosion barrier that extends the life of the fitting, even in aggressive environments.

Double Sealing and Thread Accuracy

The union fitting offers a secure connection thanks to two levels of sealing and high dimensional accuracy.

• Internal sealing is provided by the tapered seat (metal-to-metal junction), which compresses when the loose nut is tightened, forming a hermetic seal without the need for an additional flat seal.

• The cylindrical female thread (Rp) of the fitting body, in accordance with ISO 7-1 (BSPT), ensures a tight connection with the tapered male threaded tubes (R). The free nut uses a gas type thread (BSPP), according to ISO 228-1.

• The quality of the product is certified by strict control: each fitting is 100% tested to guarantee its tightness when it leaves the factory.

Tips for Efficient and Safe Mounting

To ensure optimal operation of the galvanized union, follow these installation recommendations:

• External Waterproofing: Always apply a suitable sealant (gas PTFE tape or gasket paste) to the tapered male threads (R) that screw into the two female ends (Rp) of the union body.

• Conical Assembly: Assemble the body of the union and tighten the loose nut manually, then using a wrench, until the tapered seat is perfectly compressed. Firm clamping is required for metal-to-metal sealing without excessive force.

• Control: In pressure applications, a leak check is imperative after final tightening.

• Wet Environment: The galvanized coating protects the fitting from rust, but it is always best to limit water retention areas around the fitting.

Detailed technical specifications

The table below provides a summary of the key specifications of this union fitting: