The Overspeed Governor For Lift is a mechanical safety protection device designed for traction elevators. It continuously monitors elevator car speed and triggers the safety braking system when abnormal overspeed, uncontrolled descent, or system failure occurs.
It operates as a final mechanical safeguard when electrical control systems fail, ensuring passenger safety under emergency conditions such as power loss, controller malfunction, or traction failure.
This model is widely used in elevator installation, modernization projects, and long-term maintenance replacement markets.
Key Function in Elevator Safety System
The Overspeed Governor For Lift plays a critical role in the elevator safety chain:
Monitors car speed through a rope-driven mechanical system
Triggers safety gear when overspeed threshold is exceeded
Works independently from elevator control system
Ensures emergency braking during power failure conditions
It is designed as a fail-safe device that operates even when all electronic systems are unavailable.
Technical Specifications
|
Item |
Specification |
|
Product Name |
One-way Speed Limiter |
|
Model |
OX-208 |
|
Brand |
VKSFUJI |
|
Pulley Diameter |
φ200 mm |
|
Steel Wire Rope |
φ6 mm |
|
Rated Elevator Speed |
≤ 1.75 m/s |
|
Trigger Force |
≥ 500 N |
|
Protection Type |
Upward & Downward Overspeed Protection |
|
Standard Voltage |
AC220V |
|
Optional Voltage |
DC24V |
|
Installation Type |
Machine room / Beam / Pit / MRL adaptable |
Safety Protection Mechanism
Upward Overspeed Protection
Activates traction machine brake system
Engages counterweight safety clamp system
Downward Overspeed Protection
Activates car safety gear mechanism
Stops uncontrolled descent immediately
Dual Safety System Design
Electrical cut-off at approximately 115% rated speed
Mechanical locking ensures redundant physical braking
This dual-layer structure improves system reliability under extreme fault conditions.
Engineering Design
Precision Centrifugal Trigger System
The mechanism is designed for stable activation with high sensitivity and minimal false triggering under normal vibration conditions.
Industrial-Grade Mechanical Structure
Main components are manufactured using high-strength cast iron with corrosion-resistant treatment, suitable for long-term industrial operation.
Compatibility & System Integration
The Overspeed Governor For Lift is suitable for a wide range of elevator systems:
Compatible with major traction elevator systems (OEM replacement use)
Suitable for modernization of existing installations
Flexible mounting for machine room or machine-room-less (MRL) structures
Custom bracket design available for retrofit projects
Typical replacement applications include Otis, KONE, Mitsubishi, Schindler, and Thyssenkrupp systems (depending on site configuration compatibility).
Application Areas
Engineering Expertise, Stable Supply & Cost Efficiency
Commercial office towers
Industrial freight elevators
Logistics and warehouse systems
Elevator modernization and upgrade projects
Quality Control & Factory Testing
Each unit is individually tested before shipment under controlled factory conditions.
Testing Procedures Include:
Trigger speed calibration test on dedicated test bench
Mechanical response verification under simulated load conditions
Electrical cut-off function testing
Dynamic balance inspection of rotating components
All units are shipped only after passing full inspection procedures.
Engineering Compliance
This product is designed in alignment with international elevator safety engineering practices:
Designed according to EN 81-20/50 safety principles (reference standard for elevator safety design)
Manufacturing process follows ISO 9001 quality management system
Applicable to GB 7588 elevator safety requirements (China national standard)
Custom Engineering Options
Adjustable overspeed trigger calibration (based on rated elevator speed)
AC220V / DC24V electromagnetic configuration options
Environmental upgrade kits for humidity or industrial environments
Custom mounting brackets for retrofit compatibility
Packaging & Logistics
Export-grade fumigation-free wooden case
Moisture-proof and shock-resistant internal protection
Suitable for sea freight, air freight, and express delivery
Bulk packaging available for distributor shipments
OEM & Wholesale Supply Terms
|
MOQ |
1–10 pcs for samples, flexible for distributor cooperation |
|
OEM Service |
Logo, label, packaging customization available |
|
Lead Time |
3–7 days for stock items, 10–30 days for customized orders |
|
Trade Terms |
EXW / FOB / CIF available |
|
Supply Capacity |
Stable batch production for long-term projects |
Warranty
All Overspeed Governor For Lift units are covered by a 12-month manufacturing warranty for material and functional defects under normal operating conditions.
FAQ
Q: How is each unit tested before shipment?
A: Each unit is tested on a calibrated bench to verify trigger accuracy, mechanical response, and electrical cut-off function.
Q: Can it be used for modernization projects?
A: Yes, it is designed for both new installations and retrofit elevator systems with customizable brackets.
Q: Is it compatible with high-speed elevators?
A: Yes, trigger calibration can be adjusted based on different rated speed requirements.
Q: What payment methods are accepted?
A: T/T and L/C at sight are standard, with flexible terms available for long-term partners.
Q: What trade terms do you support?
A: EXW, FOB, and CIF depending on customer logistics requirements.
Q: Do you support OEM branding?
A: Yes, OEM customization including logo, packaging, and labeling is fully supported.
Q: What is your typical delivery time?
A: 3–7 days for stock products and 10–30 days for customized production.
Q: What packaging method is used?
A: We use export-grade wooden cases with anti-moisture and anti-impact protection.
Q: Can you support long-term distributor cooperation?
A: Yes, we support stable supply agreements and long-term OEM partnerships for global distributors.
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