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Benefits of Sil-Fos® Sil-Fos® alloys have become popular in the HVAC/R and plumbing industries because of these benefits: Ability to join copper to copper without flux, saving time Streamlined brazing operation, saving time Ability to fill a wide range of joint clearances Ease of operator use, with ...

Optimal Copper-to-Aluminum Joints HVAC/R manufacturers must control several parameters to assure joint integrity when brazing or soldering parts-such as evaporator and condenser coils-to secondary copper lines or assemblies. These parameters include joint design (i.e. joint gap, shear depth, ...

Proper application of heat is a vital factor in brazing success. This technical video will show you three types of flames that can be produced by an oxy-acetylene torch: Neutral Oxidizing Reducing We'll explore the differences between these flames. Then, we'll discuss how each flame is used and the ...

Lucas-Milhaupt has studied the use of preformed rings vs. hand-fed alloy in prefabrication of refrigeration units. Let’s look at preformed rings, the advantages of using rings, and the quality of braze joints they produce. Figure 1. Cross-section, Pre-placed Ring Inside Tube-to-tube Joint Preformed ...

Flux is a chemical compound applied to joint surfaces before brazing. The addition of metallic boron changes white flux to black. This new video clip will show you the difference between these materials. We will also demonstrate several uses for black flux. For example, in a high-temperature ...

When it comes to safely brazing with oxy-acetylene torches, let's look at two important aspects: safety equipment, plus procedures for safe operation. This is serious business: arc rays and sparks can result in loss of sight, fume inhalation can lead to lung damage, and other accidents can cause ...

In about four minutes, this technical video will give you an up-close, step-by-step view of successful copper-to-copper brazing. You will learn these important steps to achieving strong, reliable joints: 1. Clean tubing and fitting, removing burrs and contaminants 2. Insert the tube, with a ...

The Right Flux for the Job High-temperature fluxes are used with brazing filler materials having melting temperatures of 1600°F (870°C) - 2000°F (1100°C), or 2200°F (1205°C) for boron-modified filler. These fluxes are useful for applications where higher-temperature alloys are needed for strength, ...

Flux is a chemical compound applied to the joint surfaces before brazing. Watch our new technical video for an in-depth look at the four functions of flux: 1. Protect from oxygen 2. Dissolve & absorb oxides 3. Help filler flow 4. Indicate temperature Then, we'll show you how Handy® Flux appears ...

How Stop-Off Works To understanding how Stop-Off works, let's review the brazing process. At Lucas Milhaupt, we preach six fundamentals of brazing: 1. Good fit & clearance 2. Clean metals 3. Uniform fluxing 4. Proper assembly 5. Brazing technique 6. Post-braze cleaning Let's focus on Step 2 - ...