Pinch-Off Pliers CH-201 – Locking Copper Tube Pinch-Off Tool

Pinch-off pliers are locking pliers that crimp a copper tube in a refrigeration circuit so that it no longer lets refrigerant through. The CH-201 has a body whose jaw opening is set with an adjusting screw and which locks by itself when squeezed; the tube stays crimped while your hands are free. In the trade it is also called a pinch-off tool, crimping pliers or tube sealing pliers.

What Is It For?

• Crimping and sealing the process (charging) tube of refrigerators and freezers after charging; the tube end is then cut and closed by brazing.
• Temporarily isolating part of the circuit when replacing a compressor or filter drier.
• Crimping the end of a copper tube closed before brazing.

How Is It Used?

1. Turn the adjusting screw so that the jaw is slightly narrower than the outside diameter of the tube.
2. Hold the pliers at right angles to the tube and squeeze the handles; the body locks and the tube stays crimped.
3. If needed, make a second pinch in front of the first, then cut the tube and braze its end.
4. Pull the release lever to open the pliers.

A pinch alone does not give a permanent seal; after closing the process tube always braze the end and check for leaks.

Technical Specifications

Frequently Asked Questions

How does it differ from ordinary locking pliers?

The jaw of pinch-off pliers is shaped to flatten the tube without cutting it, so the tube closes without tearing. Locking pliers with toothed jaws scratch or puncture the tube.

Which pliers are used for thicker tubes?

For thicker copper tubes, the CT-204 pinch-off tool with a vice-type, wider jaw is listed separately.

Can a pinched tube be reopened?

The crimped section does not return to its original shape. If the circuit has to be opened again, the tube is cut behind the crimp and a new connection is made, or a piercing service valve is used.