Pulley / Rescue Belay / Descent Control
Pat. 7,658,264
The MPD allows you to go from lowering to raising without changing hardware. More than nine years of research and development went into the patented Multi-Purpose Device (MPD), which features major innovations in advanced technical hardware for rope rescue professionals. The MPD’s high-efficiency pulley, with an integral rope-grab mechanism, allows it to be used as a lowering device on the main line and belay line systems and be quickly changed over to a raising system without switching out or replacing hardware. The combination of essential features into a single device simplifies on-scene rigging, expediting the rescue. The revolutionary MPD increases user safety with:
Reduced Weight
Fewer Components
Faster Rigging
Quick Changeovers
Simplified Training
Lower Risk
Max load of 272 kg (600 lbs)
 
The MPD is UL Classified as a Pulley, Descent Control, and Belay device.
Variable-friction descent control device for rescue systems and rappels
Incorporates a high efficiency pulley with an integral rope-locking mechanism (ratchet) for a haul system
Built-in becket allows cleaner rigging and more efficient pulley systems
Allows main line and belay line rigging to be mirrored or twin-tensioned
Functions as both a lowering brake and as a ratcheting pulley for raising
Ideal for confined space operations because it converts rapidly to a retrieval line
The MPD includes a protective Cordura® nylon storage bag and MPD User’s Manual.
*13 mm version designed for use with 12.5 – 13 mm rope. Rope used for certification rounded up to 13 mm per NFPA standards. The 11 mm model is designed for and tested with 11 mm rope. 11 mm model UL rated “T” Technical Use for descent control.
 
MPD Quick Reference Training Videos
Produced by Tom Pendley of Desert Rescue Research, the videos shot during actual training highlight basic features and how to’s with the MPD.
OPTION
ITEM
WEIGHT
ROPE SIZE
COLOR
NFPA RATING (PULLEY, BELAY)
NFPA RATING (DESCENT CONTROL)
3 SIGMA MBS PULLEY
 
13 mm Model
333000
1.2 KG (2.6 LB)
13 MM (1/2 IN)
RED
GENERAL USE
GENERAL USE
46 KN (10,341 LBF)
 
11 mm Model
333010
1.2 KG (2.6 LB)
11 MM (7/16 IN)
SLATE BLUE
GENERAL USE
TECHNICAL USE
46 KN (10,341 LBF)