with the arms bent to minimize hold up of fluids. Valve has TFE plug with three o-rings, the tip o-ring making the primary seal on the precision formed tapered seat. O-rings on the non-rotating shaft form an excellent dynamic seal between the TFE plug and glass barrel. 

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Be Made From G3.3 Borosilicate Glass

Annealing Point ------560℃

Linear Coefficient of Expansion------ 33×10-7/℃

Softening Point------820℃