T-shape, tubing connections at three sides
General Information EMP-3 High-Pure
The High-Pure connection principle is based on sliding the rigid tubing on the integrated nozzle. The arrestment of the tubing is effected by a cutting ring made of PEEK (polyether-etherketone) and the tightness by a sealing ring made of PTFE (polytetrafluoroethylene), which act on the tubing by means of the knurled nut. The cutting ring notches into the tubing to the extent to which the knurled nut is screwed on the screw joint body. When screwing on the knurled nut, a shear force acts via the cutting ring increasing the contact pressure and thus ensuring a frictional and tight, easy-releasable connection that minimizes the dead volume.
With cylindrical connecting spigot dimensioned in such a way that dilatation of the tubing does not exceed 6 % (referring to the tubing outside diameter) even with unfavourable tolerances. The tension of the remaining dilatation achieves tightness of the screw joint up to 5 bar.
Tightening of the knurled nut ensures the tightness up to 10 bar (at +20 °C).
A safety effect is guaranteed by the fact that the screw joint remains tight even when the tube connecting spigot is teared off or heavily damaged by any impact. This tightness is caused by the knurled nut pressing in the cutting ring into the cone of the screw joint thus producing a seal in the cone. The connecting spigot functions as a carrying bracket, and a carrying bracket has not necessarily to be a fixed component part of the screw joint body.
Outstanding sliding properties
Lowest friction coefficient of all fluorinated plastics
Excellent stress cracking resistance
Excellent weather resistance
No water absorption
Very good dielectric properties independent of frequency and temperature
Very good electrical insulating capacity also at air humidity
High tracking resistance
Outstanding mechanical stability, stiffness and hardness
Highest stability and pressure resistance
High impact toughness
Best wear resistance
Outstanding hydrolysis resistance
Very high temperature resistance
High dimensional stability under heat
Highest dimensional stability
Good electric insulating properties as well as favorable dielectric characteristics
Outstanding radiation resistance
Chemically resistant to acids, alkalis, and organic solvents
Not resistant to conc. sulfuric acid, nitric acid, and chloronitrous acid (aqua regia)
The body of the screw joint and the knurled nut are made of PFA (Perfluoroalkoxy). The advantages of this material are reflected in the following properties:
High-quality technical plastic for chemical apparatus and machine construction as well as electrical engineering
Chemical, thermal and dielectrical properties practically such as PTFE, but suitable for thermoplastic processing (welding, die casting, deep drawing). Lower medium diffusion, better transparency, larger hardness and better dimensional stability (lower tendency to cold flow) compared to PTFE.
Highest temperature resistance of all meltable fluorinated plastics
Very high dimensional stability in heat
Very high resistance to media
Very good pressure resistance
Low friction coefficient
Can be treated by autoclave (absolute sterile)
Comply with the guidelines from FDA and USP class VI.
Excellent resistance to weather
Material: PFA (Perfluoroalkoxy)
Colour: milky, translucent
Density: 2.10 g/cm3
Temperature range: -200 to +200 °C (highest dimensional stability in heat)
Shore hardness D: 60° to 65°
Max. operating pressure: 10 bar at +20 °C
Coefficient of sliding friction: 0.2 - 0.3 (dynamic against steel, dry)
Tensile strength: 27 to 32 N/mm2 at +23 °C
Water absorption: <0.03 %
Dielectric constant: 2,1
Surface resistance: >1017 Ohm
Tubing inside Ø