Abstract: a) An apparatus for crimping a tube in a thick panel,b) said apparatus being characterised in that the peripheral support (9) is a sleeve formed by adjacent fingers (91), separated by slots (93), the fingers being connected to a ring (92) which is not split and which is situated at the other end of the support (9), and the free end of the fingers (91) forms a cam surface intended to cooperate with the surface (82) of a cam (8).

Abstract: Steam generator comprising a supply of water to be evaporated, a steam outlet and a heat source, which steam generator is characterised in that it is formed by a casing subdivided into two chambers (2, 3) by a waterpermeable porous partition (4),one (3) of the two chambers accommodating the heat source (6),the other chamber (2) receiving the supply water (5).

Abstract: Mineral salts formed during steam generation are preferentially deposited on one or more non-woven, porous mats made of fiber-forming synthetic resin.

Abstract: The technical field of the invention is that of guillotine type valves for powdery, granular or pasty products.The technical problem posed consists in improving the valve disclosed in U.S. Pat. No. 4,356,838, so as to simplify the construction and maintenance thereof and to improve the operation thereof.According to the invention, the arms (7) of the plate (3) are removable, as well as the sleeve (23) force fitted into the external face of the orifice of the front and rear bodies of the valve. The internal face of each of the bodies (1, 2) is covered with a "duplex" seal (26) and the movable arms of the plate slide with respect to PTFE seals (16, 18). Finally, the abutment member (4) at the end of travel of the plate (3) is made retractable by means of a pneumatic or spring return device.

Abstract: A flow indicator has a pivoting flap fitted in ducting of a hydraulic installation which transports contaminated liquids. To permit the purge of a reservoir, the flap has an opening for air returning through the ducting. The opening prevents overpressure or vacuum in a circuit. The invention applies specifically to purge and vent circuits for nuclear power installations.

Abstract: The technical field of the invention is that of valves of the guillotine type for powdered, granulated or pasty products.The object is to provide such valves which are self-cleaning and therefore avoid a wedging of the guillotine plate which opposes the sealing effect of the closure of the valve by the plate.The gist of the solution of this problem resides in the fact that there are interposed, between the slideways of the body of the valve and the slidable plate straight elongated section members which are rigid with the slidable plate and are distinctly longer than this plate. These section members fill the whole of the space of the slideways and prevent the product passing through the valve from penetrating and accumulating in the slideways.The main use of the invention resides in the equipment of installations conveying powdered, granulated or particulate products.

Abstract: An improved tool is provided for the removal of tubes from heat exchangers. First a mandrel is threaded into the end of a tube. The present tool is then fitted over the mandrel and is responsive to trigger-actuated hydraulic and/or pneumatic control means to automatically cause the tool to grip the mandrel and thereafter move the mandrel with its attached tube away from the tube sheet of the heat exchanger.