As used by Heston Blumenthal on 'How to Cook Like Heston' on Channel 4.
Note that the capacities of pressure cookers indicate the full volume capacity.
The actual quantity of food/liquid that can be cooked at one time is
approximately two-thirds of this (shown in brackets below) but you
should refer to the manufacturer's instructions as capacity will vary
according to the dish being cooked.
Duromatic pressure cookers have a unique self regulating, quick release multi-valve making them exceptionally quiet in operation. The automatic lid locking system and interior capacity markings make them extremely easy to use. They are made of high quality stainless steel, are suitable for all hob types including induction and can safely be put in the dishwasher.
They come with a 10 year guarantee on all non-replaceable parts.
Diameter of all three pressure cookers is 22cm
4 litre weighs 2.8 kg (Approx. 2.7 litres actual liquid capacity)
6 litre weighs 3 kg (Approx. 4 litres actual liquid capacity)
8 litre weighs 3.1kg (Approx. 5.3 litres actual liquid capacity)