Tightening Taper-Thread Connections

When it comes to tightening taper-thread connections, you must exercise a degree of caution.

Not enough torque and the joint will leak.

But excessive torque can result in broken housings on pumps and valves – due to the force developed by the wedge action of the tapered adaptor.

This Parker document, provides a guide for torquing tapered-thread adaptors – based on the ‘turns from finger tight’ (TFFT) method:

tapered threads guide

And when it comes to taper-threads, this is about as scientific as it gets.

Craig Cook