The information in this section is presented as general data for assisting a user in the selection of valves, fittings and tubing for elevated pressure and/or temperature applications in liquid or gas plumbing systems.
Maximator’s medium, high and ultra-high pressure valves, fittings and tubing are good for most services from light vacuum up to 152,000 psi, depending on the pressure series selected. Coned and threaded type tube fittings, standard on all Maximator valves and fittings, can be used for most liquids and gases including lighter gases such as Hydrogen and Helium.
Compatibility of the valve, fitting and tubing materials with the actual process fluid is ultimately the responsibility of the user. Maxpro Technologies can assist in applications but is not an authority on all process fluids.
Some special applications such as Oxygen service require special cleaning and that option is available from Maxpro Technologies.
Below is a reference chart showing the effects of pressure versus temperature of cold worked 316 stainless steel material. When operating temperatures are above 800°F, a phenomenon called intergranular corrosion can occur. This condition can permanently change the material properties of the cold worked stainless material. Once the material has seen this elevated temperature, the material is considered to be permanently altered and a lower allowable pressure applies.
Other factors such as creep resistance, packing design and materials, corrosion resistance, cyclic conditions, and other process variables may affect the use of components at elevated temperatures. Consult factory when operating above 800°F.
The diagrams and chart on this page detail the coned and threaded joint connection and coned and threaded connection dimensions for high pressure tube connection details.
Assembly Instructions for Standard Coned & Threaded Connections
1. Insert the gland onto the tubing. Thread the left
handed collar onto the tube until one or two
threads are exposed from the tapered coned end.
2. Apply a compatible lubricant to the gland threads and the
back side of the collar where it comes in contact with the
gland. Also lubricate the tapered cone portion of the tube with a system compatible lubricant.
This will help protect the sealing surfaces from galling during the assembly process.
3. Insert the tubing into the connection and tighten the
assembly hand tight. Then use a torque wrench to tighten
the connection to the appropriate value in the table below.
It is good practice to use an additional wrench to prevent
the opposite connection from turning.
1. The High Pressure Anti-Vibration Collet Gland Assembly
can be installed using the same procedure as the standard
coned and threaded connection. (see above steps 1
through 3) The high pressure collet grips the tube when
the connection gland is tightened.
2. When using the Medium Pressure Anti-Vibration Collet
Assembly, the procedure is the same as that of the
standard coned and threaded connection (see above
steps 1 through 3) with the additional step below.
3. Once the Collet Body has been tightened to the
approriate torque value in the table below, the Collet
Gland can be turned 1 - 1/4 turns past hand tight. This will
compress the collet against the tube. After the initial
compression of the collet, any additional retightening
would only require 3/4 of a turn past hand tight.
Minimum Bend Radius for 316SS, 304SS and HP160 Tubing