Constant Hangers and Constant Supports

Constant hangers and constant supports are used for piping and related components where higher levels of vertical travel occur. Their job is to transfer the working load over the whole travel area while maintaining constancy, i.e., without any considerable deviations. The functional precision of the constant hanger is decisive for the favorable long term behaviour of the components concerned.

Operating function of LISEGA constant hanger

A distinguishing feature of LISEGA constant hangers and constant supports is their unique operating concept. It puts into effect the principle of the parallelogram of forces, which provides the following fundamental advantages:

• absolute constancy based on a principle
• load-symmetrical mechanics and structural shape
• no leverage deflection or momentum effects
• directly readable load and travel scales
• load adjustment of 40 - 100 % of nominal load
• special pre-relaxed springs
• 10,000 load cycles at constant accuracy
• approval by independent authorities

A load range of 70 - 9000 lbs, and a travel range of up to 36 inch are covered as standard. More than 200,000 LISEGA constant hangers and constant supports in use worldwide have proven to be particularly suitable and reliable.

		Constant hanger type 11 Series-made standard design, available from stock.				Brackets type 71 for type 11 Series-made standard design available from stock. The brackets can be supplied according to requirements. They can be shop fitted or supplied separately for subsequent fitting on site.
		Constant hanger type 12-14 Standard design, multi-cell hanger. Assembly possible at short notice from stock units				Brackets type 71 for type 12-14 Standard design. The brackets are normally shop assembled. On request they can be supplied loose for assembly on site.
		Constant support type 16				Angulating constant supports type 16 equipped with ball bush connections. For use where lateral forces from horizontal travel are to be avoided.
		Servo hanger type 17 Despite the use of variable spring and constant hangers, piping systems and other components are, under certain conditions, obstructed in their thermal movement by friction or other influences. In such cases servo hangers can be usefully employed.				Constant hanger trapeze type 79 This type of trapeze applies in case of limited installation length where the standard trapeze type 79 does not fit.

Serial connection types

Connection types

The connection threads correspond to the standardized diameter of the relevant LISEGA load group. At the upper connection the thread depth is limited. At the lower end, the nut is used as a turnbuckle for adjusting rod length.

The shape of the hanger housing allows direct seating on existing connection structures without extra accessories. In addition,special brackets can be attached using the standard tapped holes provided. Constant hangers above load group 9 (heavy duty) have yoke plates for bolted connections instead of connection threads.