PFB R4MC Compact Tension Weight - Spring Loaded Pulley
Product Code: TW/R4MC/200
Product Description
An ultra-compact spring-loaded tension weight, designed to provide the rope tension required for the overspeed governor rope in the lift shaft, without the need for traditional cast weights.
The R4MC replaces conventional mass-based tensioning with a spring mechanism, making it an ultra compact spring tensioner suitable for floor fixing, guide-rail fixing, or both together. This compact footprint makes it especially well suited to installations where headroom or pit depth is limited, helping engineers meet tight dimensional constraints without compromising on safety or performance.
Key features:
- Spring-loaded design eliminates the need for heavy cast tension weights
- Available with pulley diameters of 200, 250, and 300mm to suit a range of overspeed governor specifications
- Suitable for tripping speeds of up to 2.00 m/s
- Flexible mounting: floor fixed, guide-rail fixed, or a combination of both
- Ultra-compact construction, ideal for reduced pit and headroom applications
- Supplied complete with safety switch to monitor rope tension
Important note: As with all tension weight systems, the pulley diameter must match the sheave diameter of the associated overspeed governor. No additional counterweight is required when using a spring-type tensioner such as the R4MC.
Typical applications:
Fitted in the lift pit to maintain correct tension on the overspeed governor rope, ensuring reliable governor operation. Particularly suited to installations in shafts with restricted pit depth, where a standard weighted tensioner would not fit.