The Parr 3921 & 3926 Shaker Hydrogenation Apparatus both utilize either a 1 L or 2 L non-reactant vessel of Borosilicate Glass, hand-blown Borosilicate Glass, or Stainless Steel. Maximum working pressures vary according to the vessel with ranges from 30 – 65 psig obtainable. Both models are available with an explosion proof motor. The Model 3926 adds a means of heating the vessel, with control, up to 80 °C.
Each apparatus is equipped with all necessary valves and fittings for admitting hydrogen to the bottle, for evacuating the bottle and for filling the hydrogen tank-all without disturbing the bottle connection. Separate gages show the bottle pressure and the tank pressure at all times. The four-liter gas tank, bottle holder and a sturdy shaker mechanism are arranged in a compact assembly on a steel base for convenient operation on a laboratory bench or in a hood.
The gas connection from the hydrogen tank to the reaction bottle is made with polypropylene tubing that extends directly into the bottle so that no metal parts come in contact with the charge. The tank itself, its valves and pressure gages are made of stainless steel. These parts are well suited for use with hydrogen. All of these valves have stainless stems, PTFE packing and replaceable PCTFE seats to ensure positive, leak-proof control in quantitative procedures. A smaller, one-liter stainless tank (A16CA2) is available for semimicro operations in which small amounts of gas must be measured. The regular valves are easily transferred to this smaller tank.
A six foot pressure hose is furnished with each apparatus for filling the hydrogen tank from a commercial gas cylinder. This can be attached easily to any gas pressure regulator or tank valve system.