Automatic Greenhouse Vent Opener Kit with 12-inch Stroke and 15-lb Capacity - Galvanized Steel Gear Rack System
Price:
$0.5-2
MOQ:
1000
Delivery Time:
30 days
Brand:
Qingdao Sande Tech Co.,Ltd
Product Description
Product Overview
Our Automatic Greenhouse Vent Opener Kit provides intelligent climate management for greenhouses, cold frames, and polytunnels. This self-regulating system uses a precision-engineered galvanized steel gear rack and pinion drive to automatically open and close roof vents based on temperature changes, eliminating the need for manual operation or electrical power.
How It Works
The system features a piston filled with proprietary wax that expands as temperatures rise, pushing the piston rod to engage the gear rack drive and smoothly open the vent. When temperatures cool, the wax contracts, retracting the piston and safely closing the vent. This protects plants from overheating on sunny days and sudden cold snaps.
Key Features
- Fully automatic operation - works 24/7 without electricity, batteries, or manual effort
- Durable galvanized steel drive system with superior corrosion resistance
- Precise temperature control with activation range of 15°C-25°C (59°F-77°F)
- Universal mounting kit included for easy installation
- Overheat protection prevents plant stress and damage
- Low maintenance sealed system requiring no lubrication
Technical Specifications
| Specification | Details |
|---|---|
| Drive Mechanism | Galvanized Steel Rack and Pinion |
| Construction | Hot-Dip Galvanized Steel |
| Stroke Length | 12 inches / 300 mm |
| Lifting Capacity | Up to 15 lbs / 7 kg |
| Activation Temperature | Opens at 15°C (59°F), fully open at 25°C (77°F) |
Applications
Ideal for hobby gardeners and commercial growers in greenhouses, cold frames, polytunnels, and garden sheds to ensure plant health and automate garden tasks.
Product Images
Frequently Asked Questions
How does the automatic vent opener work?
The opener uses a non-electric thermal actuator with a cylinder filled with specially formulated wax that expands as temperature rises. This expansion pushes a piston that engages with the galvanized steel gear rack to smoothly open the vent. As temperature cools, the wax contracts and the piston retracts to close the vent.
What is the advantage of a galvanized steel gear rack system?
Galvanized steel offers superior strength, durability, and corrosion resistance compared to plastic or aluminum. It withstands high-humidity greenhouse environments, prevents rust, and ensures smooth operation season after season.
What temperature does it start opening and closing?
The opener begins opening at approximately 15°C (59°F) and is fully open at around 25°C (77°F). It closes completely as temperatures drop below this range.
Do I need to maintain or lubricate the system?
The thermal actuator cylinder is a sealed unit requiring no maintenance. The galvanized steel gear rack and pinion are low-maintenance, though applying general-purpose grease annually ensures smooth operation.
What happens if the vent is stuck or there is a strong wind?
The system has built-in safety features. If obstructed or encountering strong wind resistance, the piston may stop extending to prevent damage to the window or frame.
Will it work in my climate with freezing winters?
Yes, the wax withstands freezing temperatures without damage. However, disengaging or removing the opener during winter months when ventilation isn't needed extends its lifespan.
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Qingdao Sande Technology Co., LTD
Location
South Building, China-South Korea Maker Industrial Park, Chengyang District, Qingdao City, Shandong Province
Contact Person
tian