Description
Elevator Parts Door Knife S200 K300 SK40 SK50 Brief Introduction
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Product Name |
Elevator Parts Door Knife |
| Model Number | S200
K300 SK40 SK50 |
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Quality
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Original.Brand New
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Payment
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T/T. Paypal. Western Union
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Delivery
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3-5 Working Days
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Packaging
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Packed by carton
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Elevator Door Knife S200/K300/SK40/SK50: Precision Door Control Core from Nanjing Zhuye Elevatorparts
Elevator Door Knife S200, K300, SK40, and SK50 are core mechanical components designed for elevator door systems, responsible for driving the elevator car door to open and close synchronously with the landing door. As the “linkage bridge” between the car door and landing door, these door knives engage with the landing door lock during elevator operation—ensuring the landing door opens only when the car is accurately aligned with the floor and remains locked when the car is away, directly preventing passenger falls and ensuring elevator operation safety. Exclusively supplied by Nanjing Zhuye Elevatorparts (a professional and trusted distributor of high-quality elevator mechanical components), the Elevator Door Knife S200/K300/SK40/SK50 fully comply with international elevator safety standards (EN 81-20, GB 7588) and mechanical component quality regulations. With model-specific advantages (S200 for standard passenger elevators, K300 for high-speed elevators, SK40/SK50 for industrial/heavy-duty elevators), excellent wear resistance, and high synchronization accuracy, these door knives are widely applied in residential, commercial, high-speed, and industrial elevators worldwide.
Nanjing Zhuye Elevatorparts adheres to the core philosophy of “precision engagement, durable operation” and implements strict quality control over the S200/K300/SK40/SK50 door knives. Each unit undergoes multi-stage pre-delivery inspections, including dimensional accuracy testing, wear resistance verification, engagement performance trials, and load-bearing capacity detection. The products adopt high-strength materials and optimized structural designs: S200 and SK40 use high-quality carbon steel with surface quenching treatment (hardness ≥ HRC55) for long-term wear resistance; K300 and SK50 adopt alloy steel materials to withstand high-speed door opening and closing impacts (suitable for elevators with speed ≥ 2.5m/s); all models feature a precision-adjustable structure to match different door lock clearances; the built-in buffer components reduce impact noise during engagement, ensuring smooth door operation. Their standardized mounting dimensions are perfectly matched to mainstream elevator door system models, enabling quick and seamless installation without complex modifications.
Step-by-Step Usage Guide for Elevator Door Knife S200/K300/SK40/SK50
To ensure the reliable operation of the elevator door system and extend the service life of S200/K300/SK40/SK50 door knives, follow the professional guidelines provided by Nanjing Zhuye Elevatorparts for installation, adjustment, and maintenance:
1. Professional Installation & Calibration
Installation must be performed by certified elevator technicians familiar with elevator door systems. Prior to installation, confirm the correct door knife model (S200/K300/SK40/SK50) according to the elevator’s speed, load, and door type, using the detailed compatibility manual provided by Nanjing Zhuye Elevatorparts. The steps are as follows:
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Safety Preparation: Cut off the elevator’s main power supply and lock the power switch. Fix the elevator car to a safe position (aligned with the floor) using a mechanical support to prevent accidental movement. Clean the door knife mounting position on the car door panel and the landing door lock area to remove dust, oil stains, and debris that may affect engagement accuracy.
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Door Knife Installation: Fix the S200/K300/SK40/SK50 door knife to the dedicated mounting bracket on the car door using high-strength bolts provided by Nanjing Zhuye Elevatorparts. Ensure the door knife is installed horizontally (horizontal deviation ≤ 1mm) and vertically (vertical deviation ≤ 0.5mm), and the engagement surface is parallel to the landing door lock. Tighten all bolts evenly to avoid loosening due to door vibration.
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Engagement Calibration: Adjust the door knife’s opening and closing clearance using the adjustment bolts (provided by Nanjing Zhuye). The recommended clearance between the door knife and landing door lock is 2–3mm—ensure smooth engagement without jamming when the car door opens, and reliable disengagement without stuck when the car door closes. Test the synchronization of the car door and landing door: operate the door system to confirm the landing door opens/closes synchronously with the car door (synchronization deviation ≤ 0.3s).
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Post-Installation Testing: Restore the power supply and switch the elevator to inspection mode. Operate the car to move up and down to different floors, testing the door knife’s engagement performance at each floor. Ensure the landing door opens only when the car is accurately aligned and closes tightly when the car leaves. Check for abnormal noise or vibration during door operation—adjust the door knife’s position if necessary.
2. Daily Operation & Routine Inspection
Regular inspections are crucial to early detection of door knife wear and ensuring door system safety. Maintenance personnel should incorporate the following checks into their daily patrols:
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Daily Visual Inspection: During elevator shaft patrols, check the external condition of the S200/K300/SK40/SK50 door knife. Ensure the knife body is free of obvious wear (wear amount ≤ 1mm), deformation, or cracks; the mounting bolts are tight without looseness; the buffer components are intact without aging or damage. Observe the door opening/closing process to check for smooth engagement between the door knife and landing door lock (no jamming or slipping).
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Weekly Functional Check: Use a caliper to measure the door knife’s key dimensions (e.g., engagement surface width, thickness) and record the data for trend analysis. Test the door knife’s load-bearing capacity by simulating normal door opening/closing under different loads (empty, half-load, full-load). Check the elevator door system’s fault records for any door knife-related errors, and troubleshoot in a timely manner if any are found.
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Monthly Cleaning & Lubrication: Clean the door knife’s surface and engagement area with a professional cleaner to remove dust, oil stains, and metal debris. Apply a small amount of high-temperature resistant lubricant (recommended by Nanjing Zhuye Elevatorparts) to the door knife’s moving parts and adjustment bolts to ensure flexible operation. Avoid lubricant contamination on the engagement surface to prevent slipping.
3. Regular Maintenance Schedule
Systematic maintenance can effectively extend the service life of S200/K300/SK40/SK50 elevator door knives. Follow Nanjing Zhuye Elevatorparts’ recommended maintenance plan:
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Quarterly Maintenance: Disconnect the power supply and fix the car to a safe position. Remove the door knife’s protective cover (if equipped) to inspect the internal structure for wear or damage. Recheck the engagement clearance and adjust if there is any deviation. Tighten all loose bolts and replace any damaged buffer components with genuine parts.
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Semi-Annual Performance Test: Conduct a comprehensive performance test, including engagement accuracy, synchronization performance, wear status, and load-bearing capacity. Simulate extreme operating conditions (e.g., low-temperature environment, frequent door opening/closing) to verify the door knife’s stable operation. For elevators in high-traffic areas (e.g., shopping malls, airports), increase the test frequency to once every 3 months.
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Annual Professional Overhaul: Arrange a professional inspection with Nanjing Zhuye Elevatorparts’ certified technical team. Calibrate the door knife’s dimensional accuracy and engagement performance to meet the original factory standards. Replace severely worn door knives with genuine S200/K300/SK40/SK50 units if the wear amount exceeds 1mm or the engagement performance is degraded.
Recommended Replacement Cycle for Elevator Door Knife S200/K300/SK40/SK50
As a core mechanical component bearing frequent engagement friction, long-term load-bearing, and environmental erosion (humidity, dust, vibration), the S200/K300/SK40/SK50 door knives have a specified service life. Timely replacement is critical to avoiding faults such as excessive wear, engagement failure, or synchronization deviation—issues that may lead to elevator door opening/closing failures, landing door misalignment, or even serious safety accidents.
1. Standard Replacement Cycle
Under normal operating conditions (elevator daily operation time 12–24 hours, daily door opening/closing cycles ≥ 1500, environment temperature -10–60℃, humidity 10%–95%), the recommended replacement cycle is: S200/SK40 (standard/light-duty type): 4–5 years; K300/SK50 (high-speed/heavy-duty type): 3–4 years. This cycle is determined based on Nanjing Zhuye Elevatorparts’ long-term field data, door knife wear tests, and global user feedback.
2. Adjustments for Special Scenarios
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Harsh Environments: For elevators in high-humidity coastal areas (salt spray corrosion), high-dust construction sites, or shafts with large temperature fluctuations, the replacement cycle should be shortened to S200/SK40: 2–3 years; K300/SK50: 1.5–2.5 years. Harsh conditions accelerate knife body corrosion, wear, and bolt loosening, significantly reducing the door knife’s reliability.
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Low-Frequency Use Scenarios: For elevators with low usage frequency (e.g., villa elevators, small office buildings with daily operation time < 8 hours) and clean, stable shaft environments, the replacement cycle can be extended by 1–2 years—only if Nanjing Zhuye’s professional inspection confirms the door knife’s wear amount, engagement performance, and synchronization accuracy are intact (consistent with original factory standards).
3. Immediate Replacement Conditions
Replace the S200/K300/SK40/SK50 elevator door knife immediately if any of the following issues occur, regardless of service life:
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The door knife’s wear amount exceeds 1mm, leading to unstable engagement with the landing door lock (e.g., door slipping, inability to open/close normally).
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The door knife is severely deformed or cracked, affecting the synchronization of the car door and landing door, or posing a risk of sudden failure during operation.
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The engagement clearance cannot be adjusted to the standard range (2–3mm) due to component wear, resulting in frequent jamming or disengagement failure.
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The door knife fails the safety performance test, failing to meet the elevator’s door system operation requirements (e.g., synchronization deviation > 0.3s).
In conclusion, the Elevator Door Knife S200/K300/SK40/SK50 supplied by Nanjing Zhuye Elevatorparts are high-quality, reliable door control components tailored for different types of elevator door systems. By following the correct usage methods, maintenance schedules, and replacement cycles, elevator maintenance teams can effectively ensure the stable and safe operation of the elevator door system, enhance passenger ride experience, and minimize failure risks. Choosing Nanjing Zhuye Elevatorparts means you get not only authentic S200/K300/SK40/SK50 door knives but also professional technical support, including model matching guidance, on-site installation advice, and prompt after-sales service.
