Teflon O-rings

Figure 2 Schematic diagram of a 100-mL UV-autoclave. a = gas and sampling valve, b = thermocouple, c = quartz window, d = Teflon O-rings, e = autoclave lid, f = rupture disc, g = valve and pressure gauge, h gaskets, i = autoclave body, k = glass insert, 1 = temperature control, m stirring bar. (Pmax 300 bar, Tmax = 150 °C) (Reproduced with permission from Ref. 7. Copyright 1983 Elsevier Sequoia.)...

Figure 1. Diagram of Teflon cell (1) platinum electrode (2) glass scintillator (3) Macor ceramic disk cell bottom (H) Teflon O-ring (5) flexible elbow (see insert) (6) cell ports (six of them around cell body) (7) light pipe. Inset shows the details of the flexible elbow (8) stainless steel sphere (9) concave Teflon spacer (10) platinum wire for electrical connection across elbow (11) lock nut.

Fig. 14. Prolabo column assembly. Top line 10-cm column holder fastened to handnut. Upper middle line connecting tube to detector, Teflon O-ring, 10-cm column. Teflon 0-ring, septum, nut with syringe needle guide. Lower middle line 15-cm-long column in holder. Bottom line 5-cm-long column in holder.

In a 50-mL two-necked round-bottomed flask, fitted with a Teflon septum, a Teflon adapter with a Teflon outlet tube attached to a soda lime tower, and a Teflon O-ring to hold the Teflon tuhe, was placed a solution of ( + )-2,10-(3,3-dichlorocamphorsultam) (3.0 g, 10.6 mmol) in CHCI3 (50 mL). To this solution was added of NaF (2.1 g, 50 mmol), dried overnight under high vacuum. The reaction flask was cooled... 

Figure 1. Cross section of sampling cartridge 1, stainless steel swagelok nut, 0.64 cm ( 4 in.), no. SS-402-1 2, stainless steel swagelok male connector, 0.95 cm (fIn.), NPT no. SS-400-1-6 3, Teflon O-ring, 2.664 cm i.d., wall thickness 0.262 cm 4, stainless steel screen, 40 mesh 5, stainless steel swagelok cap (modified with female in. NPT through end), no. SS-2400-C 6, Pyrex brand glass wool 7, XAD-2 Amberlite resin and 8, 304 stainless steel tube, 3.81 X 0.305 cm (1.5 X 0.120 in.), ASTM A269.

I, inset M, main body with Kapton windows (W) and seals (R) and outlet for vacuum pump (V) PI and P2, plates for assembly of cell SI and S2, seals for cell T1 and T2, thermocouples. A Teflon O-ring (TR) may be optionally used. Reprinted with permission from (Hannemann et al., 2007). Copyright 2007 Wiley-Blackwell. 

The high-pressure optical cell is comprised of a Monel 400 body, gold or teflon O-rings, and CaF2 or sapphire windows. The two windows are secured using an opposed force-type seal incorporating Belleville spring washers. The cell is essentially leak-free at pressures up to 3000 psia ( -200 atm). 

Reactors. Pyrex reactors were made by joining a heavy-walled Pyrex vessel to a greaseless J. Young glass valve provided with Teflon O-rings. The Pyrex reactors were flame-dried under a vacuum of lO" torr. The reactors were made of Vi diameter... 

Fig. 7.17. High-pressure flow-cells. (A) Cell for voltammetric measurements in water-in-CO, microemulsions a working electrode, b reference electrode, c supercritical fluid inlet, d supercritical fluid outlet, e sample port, f Teflon O-ring. (B) Fibre optic-assisted cell for fluorimetric measurements. (Reproduced with permission of the American Chemical Society.)...

Figure 3.1-1 Cross-sectional view of a microscale spectroscopic vessel for monitoring reactions in SCFs C = CaF2 window P = port S = stainless steel window holder and T = Teflon O-ring (PTFE).

F, copper wire G, Viton 0-ring H, Vespel 0-ring I, Teflon O-ring J, Viton O-ring K, gas inlet. 

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