Supra: a new high-performance door

Meiller has developed a new door series: the high performance Supra door. Among other things, it should be characterised by extremely quiet running.

The worldwide trend to urbanisation has been evident for years. According to UN surveys, about 55 percent of the world’s population currently live in big cities or their catchment areas. The latest surveys predict this proportion will increase to 68 percent by 2050.

Together with the continuing growth of the world’s population, this means that for big cities in particular, corresponding residential space has to be created. But since the area available is already becoming scarce, construction is increasingly upwards.

Quality expectations rising

This applies not only to residential buildings, but in addition an increasing number of multi-storey, multi-functional buildings are being built, for example accommodating shops on the ground floor. The storeys above house doctors’ practices, law firms or offices. Private parties live in exclusive flats or lofts on the upper floors.

At the same time, the quality expectations of investors, owners and tenants are increasing. Consequently, special attention is paid to high quality fittings when designing such buildings. This applies not least also to the lifts, where the focus is on enhanced comfort, excellent performance and quiet operation.

"Very quiet-running"

90 mm diameter rollers and flanged kicking rollers are intended to ensure smooth door running, less wear and more safety. Photo: © Meiller Aufzugtüren

Meiller, the Munich-based specialist for lift doors, has developed a new door series for these purposes: the Supra high performance door. "Apart from the quality features tried-and-tested in standard doors at Meiller, such as extremely sturdy, double-walled door leaves or continuously adjustable door leaf guides, the door runs extremely quietly," explained the company.

This is not least due to the 90 mm diameter rollers, which given a door clearance of 1100 mm, only perform about two revolutions. In addition, high quality plastic ensures that the rollers have a long life and are less subject to wear, Meiller emphasised.

Moreover, to further enhance the noise insulation, the door leaves can be filled with rock wool without this impairing fire test approval according to EN 81-58, E 120.

Additional safety

The kicking rollers have a diameter of 35 mm and are fitted with flange that grips behind the profile of the running rail. This provides for additional safety, because in the event of someone or something striking the door from the landing, the door leaves are held in position, which prevents them jumping out of the running rail.

The rollers and kicking rollers are positioned as far outside on the door leaf suspension mounts as possible and are designed to ensure that the door leaves do not start to rock during acceleration or braking. This is further supported by close positioning of the kicking rollers to the running rail.

Through the shaft with no interruptions

The car doors of the Supra series are delivered as standard with a Siemens AT40 drive. They are fitted with a new catch system, based on the design of the TM1-V skate: the new skate bears the suffix "L" (i.e. TM1-VL) and with 12 mm provides far more clearance.

This is important, because the door is also intended for higher-speed lifts, up to about 4 m/sec. Greater clearance and as a result more distance of the skate brackets of the car door from the hook lock rollers of the landing door are intended to ensure that the car can travel fast und unimpeded through the shaft.

The landing doors can be delivered according to DIN 18091 or fire-tested according to EN 81-58, E 120. Glass door panels or sheet metal leaves with inspection panel (fire brigade panels) can be supplied for the Supra door series.

Weitere Informationen: meiller-aufzugtueren.de