Constant Load Supports

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The Constant Support designed and manufactured by Carpenter & Paterson incorporates the latest design concepts, resulting in a constant supporting effort through the total travel of the unit. The simplified construction, together with the established principle of a compression spring working in conjunction with a bell crank lever, achieves a mathematically perfect counter-balancing of spring and load moments about the main pivot point.

The design incorporates as standard a device for in situ load adjustment of plus or minus 20% of the set load. This adjustment does not reduce the travel range. The Constant units are manufactured to have a maximum deviation of 5% from the set load unless a lower figure is requested at enquiry stage. Upper and lower travel stops are incorporated in all units to prevent excessive overtravel.

Pipe Hanger Range: Loads up to 350,000 N (35,000kg)
Travel range: up to 600 mm.

Special Constant Supports can be designed to suit customer's specific requirements.

The photograph shows a selection of high quality Constant Supports manufactured for use in a Power Station in Singapore.

A spring locking device (multi-lock) can be specified. This device allows the spring to be locked at any position within its travel range.

Witch constant effort supports are designed to be maintenance free, and incorporate PTFE based dry bearings and thrust washers.

Special Range

Special Constant Supports can be designed to suit customer's specific requirements, i.e. higher loads, travels and configurations other than those indicated in the standard range.

Load Adjustment

Although the supports are preset to the customer's specified load and travel, it is sometimes necessary to adjust this preset load to accommodate minor variations in actual site conditions. A simple operation of turning the load adjuster screw in the appropriate direction to increase or decrease the load is all that is necessary. The amount of adjustment is shown on the adjacent scale calibrated in 2% divisions. The maximum adjustment being plus or minus 20% of the mean load.

Presetting

All Constant Supports are fitted with preset pins which are painted red. These pins are factory positioned within the unit to suit the customer's specified installation condition. On completion of installation and prior to removal of the pins, the pipework system can be hydraulically tested or acid cleaned without further deflection of the spring assembly. The preset pins must be removed before commissioning the system (refer to installation instructions).

Our standard presetting pins will enable loads of up to twice the capacity of the support to be taken during the hydraulic testing period.