Views: 1 Author: Site Editor Publish Time: 2026-09-03 Origin: Site
What is a Passenger Hoist Anti-Fall Safety Device?
An anti-fall safety device is the primary safety mechanism installed on rack-and-pinion construction hoists. It prevents the hoist cage or counterweight from free-falling by automatically stopping movement if over-speed conditions occur.
How does the progressive safety device work?
The progressive safety device consists of four main parts:
Pinion Gear
Centrifugal Speed Limiter
Cone Drum
Brake Device
When the cage exceeds its rated downward speed, the centrifugal speed limiter engages the cone drum, progressively applying friction to bring the cage to a smooth, safe stop.
What are the main SAJ series models available?
Popular SAJ series progressive safety device models include:
SAJ30 Series: SAJ30-0.5, SAJ30-1.2, SAJ30-1.4, SAJ30-1.6
SAJ40 Series: SAJ40-1.2, SAJ40-1.2A, SAJ40-1.4, SAJ40-1.6, SAJ40-2.0
SAJ50 & SAJ60 Series: SAJ50-1.2A, SAJ50-2.0, SAJ60-1.2, SAJ60-2.0
SAJ70 Series: SAJ70-1.4
What are the key technical specifications for SAJ safety devices?
Key technical parameters vary depending on the hoist capacity:
Model Series Constant Braking Load (kN) Rated Braking Speed (m/s) Device Weight (kg)
SAJ30 30 kN 1.2 – 1.6 m/s 35 – 50 kg
SAJ40 40 kN 1.2 – 2.0 m/s 50 – 56 kg
SAJ50 50 kN 1.2 – 2.0 m/s 50 – 56 kg
SAJ60 60 kN 1.2 – 2.0 m/s 50 – 56 kg
SAJ70 70 kN 1.4 m/s 56 kg
(Note: Calibration speed is custom-adjusted according to elevator operating speed and user requirements.)
Which hoist brands are compatible with SAJ safety devices?
SAJ progressive safety devices are widely compatible with major construction hoist brands, including GJJ, BAODA, and other standard rack-and-pinion elevator models.
Why is regular inspection and calibration essential?
Accident Prevention: Prevents catastrophic free-fall accidents on job sites.
Compliance: Meets international construction safety regulations.
Component Longevity: Ensures the centrifugal brake mechanism activates precisely at designated speed thresholds.
