Abstract: A valve for a pipe system wherein liquid circulates is intended to be controlled dependent on the liquid temperature within the system by means of a thermostat adapted to actuate an electro magnet which, on its part, dependent on whether it is current-carrying or not, is adapted to retain the valve spindle in a position corresponding to open or closed valve position, respectively. The valve housing has plate-shaped seat body having a large central through-going flow opening and a number of smaller corresponding openings closer to the circumference. A spring-loaded first valve body is displaceably arranged on the spindle and cooperates with the central opening of the seat body in order to close/open the opening, a concentrical, spring-loaded hollow piece constituting a second valve body which also is displaceably arranged on the spindle cooperating with the peripheric openings via an annular flange portion in order to close/open the last-mentioned openings.

Abstract: There is provided a valve damper which is pivotally suspended and may in its closing position cooperate with a seat, e.g., formed in a ventilating channel, and wherein an annular seal may be placed on the damper and/or seat. In order to achieve a smoke-tight closure of the damper, the latter is connected to a pivot shaft via resilient carriers, the attachment points thereof on the damper being displaced in relation to the axis of the pivot shaft.

Abstract: A ventilator unit (1) intended for installation in the outside wall of a room such that used air (A) from the room is vented to the outside atmosphere through the outside wall while fresh air (B) is introduced from the outside and supplied to the unit (1) where it is suitably air conditioned, before being blown into the room, the unit comprising an exhaust fan (12) and an inlet fan (13), and also including for purposes of heat recovery a heat exchanger (15', 15") for transferring heat from the outflowing air (A) to the inflowing fresh air (B), wherein the two streams of air (A, B), as known per se, alternate periodically through two equal regenerator masses.

Abstract: For mounting plates (4) to a framework structure, the channel members (1) which constitute the structural members of the framework are adapted to receive fastener members (2), so that plates (4) which are fastened to the framework structure are firmly secured to the frame by the fastener members (2) as a result of friction or a latch connection between the fastener and the channel members (1) which form the framework structure.