In the oil and gas industry, reliability is not optional—it’s essential. That’s why Tubeplus, a leading chemical injection check valve manufacturer from China, has been delivering trusted oil tool solutions for global operators. With our own R&D center and advanced production facilities, we design valves that keep wells safe, efficient, and productive.
The Defender Series: Built for Harsh Oilfield Environments
Our flagship Defender chemical injection check valve is engineered to solve real-world challenges in production systems. By protecting capillary lines and preventing solids from blocking the system, the Defender keeps operations running smoothly—helping you avoid costly downtime.
Key Features of Tubeplus Defender Valves
- Reliable Backflow Prevention– Stops backflow to protect equipment and maintain system integrity.
- High-Quality Silicon Seal– Leak-resistant and corrosion-resistant, extending service life even in aggressive chemical environments.
- According to API 598 << The inspection and Pressure Testing on valve>> – Every valve is tested to the industry’s strictest inspection standards, ensuring durability and safety.

Why Operators Trust Tubeplus
Tubeplus is recognized as one of China’s best chemical injection check valve manufacturers thanks to:
- Proven Performance– Designed for offshore platforms, onshore wells, and subsea systems.
- Consistent Quality– Stringent testing and premium materials guarantee reliability.
- North American Success– Our valves are trusted by operators in the U.S. and Canada for durability and ease of installation.
Our in-house R&D team continuously develops new designs to meet evolving field challenges. From concept to delivery, every step is optimized for quality, backed by API 598-compliant testing and international standards.

Upgrade Your Injection Systems with Tubeplus
If you’re looking for reliable, high-performance chemical injection check valves, Tubeplus is your trusted partner. With proven quality, stable supply, and a strong track record in North America, we help oilfield operators reduce risks and maximize production.
Contact Tubeplus today to learn why global operators choose our API 598-tested valves for safe and efficient oilfield operations.