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Dual Spring Lifts Greenhouse Vent Automatic Opener kit

No electricity required-automatically regulates temperature and ventilation.
Opens up to 45cm with a maximum load of 15kg.
Aluminum + PC construction for lightweight durability and corrosion resistance.
Easy installation with minimal maintenance required.
Dual-spring design ensures smoother and more stable operation than single-spring models.

Ideal for Small and Medium Greenhouses

dual spring window opener Scenario

Company Overview and Manufacturing Excellence

Company Background

CL founded in 2004, Chenlong Hardware is a China-based factory specializing in greenhouse automatic window openers. We focus on delivering reliable ventilation solutions tailored for different greenhouse needs.

Core Manufacturing Capabilities

ChenLong equipped with automated lines for cutting, stamping, bending, and coating, our factory ensures stable quality and efficient production for every vent opener we make.

Technical Strength

With 20+ years of hardware manufacturing experience, we offer strong metalworking and mold design capabilities, supported by skilled technicians and advanced testing tools.

Certifications & Trust

ISO9001 certified, Chenlong follows strict quality control and customer-first principles. We offer OEM/ODM services and long-term support to partners worldwide.

Vent Opener User Installation Guide

Tool Preparation:Prepare necessary tools and set the opening temperature by turning the cylinder.
Part Connection:Insert the piston into the push rod and secure the connection.
Mounting Position: Install the opener at the window center with the cylinder facing up; lubricate threads and rod before use.
Seasonal Maintenance: Remove the cylinder at the end of summer and store it dry. Avoid installation in rainy or poorly ventilated areas.

CL Manufacturer’s Commitment to You

CL offer comprehensive service guarantees for our dual-spring automatic window openers. Dual spring greenhouse window opener are packed with high-quality foam to effectively protect against damage during transportation, ensuring safe delivery. All orders are shipped via container to ensure secure and timely logistics. The minimum order quantity is 100 units, catering to bulk purchasing needs. We commit to delivering within 5 working days after order confirmation to speed up receipt. CL facrtory have a professional after-sales team providing technical support and quick response services to assist customers with installation and usage issues, ensuring a smooth user experience and long-term cooperation.

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