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H21 Double-Leaf Gate Hook Lock | Electric Locking Solution for automatic swing gate 。The H21 Double-Leaf Gate Hook Lock is an electric locking device designed for automatic gate systems. It is suitable for double-leaf swing gates, courtyard gates, villa gates, residential gates, factory gates and other outdoor automatic entrance applications.
The H21 Double-Leaf Gate Hook Lock is an electric locking device designed for automatic gate systems. It is suitable for double-leaf swing gates, courtyard gates, villa gates, residential gates, factory gates and other outdoor automatic entrance applications.
Conventional mechanical padlocks may become difficult to open when the gate is under wind pressure, or when the lock and strike become misaligned. The H21 solves this problem by using an electric locking roller and strike assembly to automatically lock the gate when it closes and unlock it before the gate opens. This makes automatic gate operation more stable, secure and convenient.
The lock features a robust stainless steel housing, fully enclosed front structure and bottom cable outlet for long-term outdoor use. It is also equipped with a working indicator light, voltage step-down module and cushioning rubber pad, making daily maintenance easier while reducing risks caused by prolonged power supply and metal impact during closing.
1. Electric Locking for Wind-Related Padlock Issues
When used with a Byekey controller, the H21 automatically locks after the gate closes and unlocks before opening. This avoids the common problem of conventional padlocks becoming difficult to open under strong wind pressure.
2. Stainless Steel Housing for Outdoor Environments
The lock body is made of stainless steel for strong weather resistance and structural durability. It is suitable for long-term outdoor applications such as courtyard gates, industrial entrances, parking areas and factory gates.
3. Fully Enclosed Front Structure for Added Security
The front of the lock body uses a fully enclosed design to reduce access to the internal locking mechanism. This helps prevent unauthorized opening and improves protection against tampering.
4. Fully Welded Strike with 8mm Locking Roller
The strike adopts a fully welded construction and is paired with an 8mm-thick locking roller for a stronger and more reliable locking point. A mistake-proof design also helps prevent reverse installation and improves on-site installation efficiency.
5. Bottom Cable Outlet to Reduce Tampering
The cable exits from the bottom of the lock body rather than the side. This makes the wiring more concealed and reduces the risk of pulling, cutting or deliberate damage, while also creating a cleaner installation appearance.
6. Working Indicator Light for Quick Troubleshooting
The lock is equipped with a 24V working indicator light. If the gate fails to open or the lock does not respond, the indicator helps users quickly check the power supply and lock status, reducing troubleshooting time.
7. Built-In Step-Down Module for Long-Term Power Supply
A built-in voltage step-down module allows the lock to remain energized for extended periods more safely. It helps prevent overheating or burnout caused by unexpected prolonged power supply.
8. Cushioning Rubber Pad for Quieter Closing
A cushioning rubber pad is installed at the bottom of the lock body to absorb metal-to-metal impact when the gate closes. This reduces closing noise and minimizes long-term wear on both the lock and the gate.
The H21 Double-Leaf Gate Hook Lock is suitable for a wide range of automatic gate locking applications, including:
– Villa courtyard gates
– Residential community entrances
– Factory and warehouse gates
– Industrial park entrances
– Parking lots and logistics access gates
– Commercial perimeter gates
– Double-leaf swing gates and automatic gates requiring sequential opening and closing
Datasheets, wiring diagrams and installation drawings for this model — free to download, no registration.
The H21 is an electric hook lock (double-leaf gate hook lock) designed for automatic swing gate systems. When used with a Byekey gate opener controller, it automatically locks the gate when it closes and unlocks before the gate opens, replacing conventional mechanical padlocks.
It is designed for double-leaf swing gates, courtyard gates, villa gates, residential community entrances, factory and warehouse gates, industrial park entrances, parking and logistics access gates and commercial perimeter gates.
A mechanical padlock can become difficult to open when the gate leaf is under wind pressure or when the lock and strike are misaligned. The H21 automatically locks and unlocks in sequence with the gate opener, making operation more stable, secure and convenient even in windy conditions.
The lock is wired to the gate opener's lock port (the H3/H9 controllers provide a 1.2A/24V lock output). The controller unlocks the H21 before opening and locks it after the gate closes, fully automatically.
It operates at 24V DC with a lock current of 2A; the working indicator light also runs at 24V.
Locking force is 74N and lock stroke is 25mm, with a fully welded strike and an 8mm-thick locking roller for a strong, reliable locking point.
Yes. The lock body is made of stainless steel with a fully enclosed front structure, built for weather resistance and long-term outdoor use in rainy and humid environments, including water-exposed conditions.
Operating temperature is -35°C to 75°C, suitable for cold and hot outdoor climates.
The fully enclosed front design restricts access to the internal mechanism, and the cable exits from the bottom of the lock body rather than the side, concealing the wiring and reducing the risk of pulling, cutting or deliberate damage.
Yes. The lock is supplied with 2 keys, and the key cylinder on the lock body allows manual release from the outside when power or the automatic system is unavailable.
Yes, a 24V working indicator light shows the power/lock status. If the gate fails to open or the lock does not respond, the indicator helps quickly check the power supply and identify the fault.
Yes. A built-in voltage step-down module allows safe long-term energization and reduces the risk of overheating or burnout from unexpected prolonged power supply.
A cushioning rubber pad at the bottom of the lock body absorbs metal-to-metal impact when the gate closes, reducing noise and minimizing wear on both the lock and the gate.
Total lock body length is 245mm, lock body width 50mm, base plate width 90mm, base plate length 185mm, thickness 54mm, hole spacing 72mm, strike width 48mm, with 6mm screw holes. Detailed drawings are provided in the three-installation-methods manual.
The strike has a mistake-proof (poka-yoke) design that prevents reverse installation, speeding up on-site installation.
The cable exits from the bottom of the lock body for a concealed, clean installation and better protection against damage.
Each set contains 1 lock body, 2 keys, 1 accessory pack and 1 user manual.
Package size is 365×135×110mm and gross weight is about 2kg per set, suitable for sea, air and express shipping.
One H21 is normally installed at the meeting point of the two leaves to lock the gate in the closed position; for high-security or very large gates, two locks can be used on request.
It works with any 24V DC gate controller providing a lock output with sufficient current (2A), including the Byekey H3L, H9 and other compatible automatic gate systems.
Yes, OEM and ODM customization is available, including logo, packaging and specification adjustments; contact our sales team for MOQ and details.
Standard models support sample orders with a low MOQ (often 1 set), production lead time is about 3–7 working days for standard items, and gate accessories carry a 1–2 year warranty with lifelong technical support.
