Oleo Oil Buffers are hydraulic safety components installed in elevator pits or shaft overhead positions to absorb kinetic energy during emergency conditions such as uncontrolled descent, traction system failure, or overspeed events.
They are designed to reduce impact force between the elevator car or counterweight and the shaft structure by converting mechanical energy into controlled hydraulic resistance, ensuring safe deceleration and structural protection.
These buffers are widely applied in passenger elevators, freight systems, and high-rise building elevator safety systems.
Working Principle
In actual elevator failure conditions, two critical safety scenarios may occur:
Downward free-fall or overspeed condition
The elevator car impacts the pit-installed buffer. The piston compresses hydraulic oil through a precision damping system, converting kinetic energy into heat and fluid resistance, gradually reducing speed until full stop.
Upward overtravel condition (top collision protection)
When installed at the shaft top, the buffer reduces impact force between the car and overhead structure, preventing severe mechanical damage during uncontrolled upward movement.
This dual-direction protection ensures compliance with modern elevator safety engineering design requirements.
Technical Specifications
|
Parameter |
Unit |
OH-30A |
OH-30B |
|
Rated speed |
m/s |
≤0.63 |
≤0.63 |
|
Buffer mass range |
kg |
1800–4000 |
2800–5600 |
|
Compression stroke (S) |
mm |
40 |
40 |
|
Free height (H) |
mm |
150 |
155 |
|
Hydraulic oil volume (HL-46) |
L |
0.10 |
0.17 |
|
Base plate size |
mm |
130 × 150 |
130 × 170 |
|
Mounting dimensions (a × b × D) |
mm |
100 × 120 × φ14 |
100 × 135 × φ14 |
Model Selection Guidance (Engineering Decision Support)
To simplify project selection:
OH-30A → Standard passenger elevator systems (light to medium load applications)
OH-30B → Heavy-duty elevator systems with higher buffer mass requirements
If you are unsure about selection, our engineering team can provide compatibility verification based on your elevator parameters.
Compliance & Engineering Standards
Oleo Oil Buffers are designed and tested in accordance with international elevator safety requirements:
EN 81-20 / EN 81-50 (European elevator safety standards)
ASME A17.1 (North American elevator code)
GB 7588 (China elevator safety standard)
Engineering Proof Available:
We can provide test reports, batch inspection records, and compliance documentation for project approval, tender submission, and safety certification processes.
All units are traceable via production batch number for quality verification.
Application Scope
Custom Engineering Options
To support different project requirements:
Rated speed-based buffer configuration
Load capacity adaptation (light to heavy duty systems)
Multiple buffer series (LSB / SEB / MLB / LB / XLB / HSL)
Customized mounting dimensions based on shaft design
Hydraulic oil volume adjustment for stroke performance optimization
Return spring system tuning for specific damping behavior
Our engineering team supports full technical matching based on elevator car weight, rated speed, and travel height.
Quality Control System
Each Oleo Oil Buffer undergoes strict factory inspection procedures:
Packaging & Shipping
Export-grade reinforced wooden case packaging
Moisture-proof and shock-resistant protection
Suitable for sea freight, air freight, and express delivery
Palletized packaging available for distributor bulk orders
MOQ, Payment & Trade Terms
|
MOQ |
Flexible, trial orders supported for standard models |
|
Payment Terms |
T/T, L/C at sight |
|
Trade Terms |
EXW / FOB / CIF supported |
|
Samples |
Available for engineering evaluation |
Delivery Time
Stock models: 3–7 working days
Standard production: 10–30 days
Custom engineering orders: Confirmed based on technical requirements
Warranty & Technical Support
All Oleo Oil Buffers come with a 12-month manufacturing warranty covering production defects under normal installation conditions.
We also provide:
Lifetime technical consultation support
Installation guidance for engineering teams
Replacement and troubleshooting advisory service
Engineering Selection & Fast Response
Not sure which model fits your project?
Send us:
Elevator car weight
Rated speed
Travel height
We will provide:
Free model selection
Compatibility confirmation
Engineering calculation support
Response time
Within 24 Hours
FAQ
Q: What payment methods do you accept?
A: We support T/T, L/C at sight, and negotiated terms for long-term cooperation.
Q: What trade terms are available?
A: EXW, FOB, and CIF depending on project requirements.
Q: What is your MOQ?
A: Flexible MOQ with trial orders available for standard models.
Q: What is your delivery time?
A: 3–7 days for stock items and 10–30 days for production orders.
Q: How is product quality ensured?
A: Each unit undergoes hydraulic pressure, stroke, and sealing tests before shipment.
Q: What packaging do you use?
A: Reinforced export wooden cases with moisture and impact protection.
Q: Do you support OEM or customization?
A: Yes, full OEM branding and engineering customization are supported.
Q: What certifications can you provide?
A: EN81 / GB / ASME compliance documents and factory test reports available for projects.
Q: Do you support long-term supply agreements?
A: Yes, we support distributor partnerships and OEM long-term supply contracts.
Hot Tags: oleo oil buffers, China oleo oil buffers manufacturers, suppliers, factory