By Application:    Architectural Laboratory Water Treatment Marine Air Handling

polyethylene coupling

In this section, we will review the engineering material submitted in this proceeding [Docket 19692], and, in some instances, draw tentative conclusions as a result of our study of this material. Under the heading Sampling Lines we consider as the first of two major components of a sampling system, the design and disposition of the coaxial cable which delivers the sample currents from each tower of the array to the antenna monitor, and under Coupling Elements, the apparatus used to extract samples of the tower currents to be fed into the sampling lines. In the section Maintenance of Sampling System Performance we discuss measurement procedures which may be used to detect any deterioration in system performance, and under Other Considerations outline other minor details of system design which appear of sufficient importance to record for general guidance, but, in many instances, seem inappropriate for inclusion in broadly drawn rules.
The question of the amount and kind of dielectric, and the initial processing of the cable, is rather intimately related to the question of whether equal length sampling lines should be required in any or all systems. When the ambient temperature of a coaxial line is raised, the metal in the cable expands, causing an increase in the physical length of the cable. For any given length of cable, this effect, alone, results in an increase in the phase delay in the cable. However, a temperature change in the same direction affects the constant of the dielectric in the cable so as to produce a counter effect -- tending to reduce the phase delay when temperature increases. If a solid dielectric is employed, the latter effect is predominant, and lines with such dielectric exhibit a rather large negative phase / temperature characteristic. On the other hand, lines in which the dielectric is principally air or other inert gas exhibit a much lower coefficient, generally in the positive direction. Cable with foamed polyethylene dielectric has a temperature / phase characteristic which, while inferior to air line, is much better than that exhibited by cable with solid dielectric.

• Flange Plastic
• HDPE Coupling
• HDPE Flange
• PE Coupling
• PE Flanges
• Plastic Flange
• Plastic Flange Bearing
• Polyethylene Coupling
• Polyethylene Flange
• Tank Coupling
• Tank Flange

• Products Home

Please Contact Us to discuss your polyethylene coupling needs. You design it, we build it.

polyethylene coupling