Introduction
Wellhead Check Valve is a critical well control safety device (check valve) compliant with API 6A standards, suitable for high-pressure and high-temperature conditions, and capable of stable operation within a pressure range of 2,000–15,000 PSI.
Parameters and Specifications
|
Standard |
API SPEC 6A |
|
Nominal size |
1/13-16"~7-1/16" |
|
Rated pressure |
2000PSI~15000PSI |
|
Product specification level |
PSL-1 ~ PSL-3 |
|
Performance requirement |
PR1~PR2 |
|
Material level |
AA~HH |
|
Temperature level |
K~U |
Features
Automatic backflow prevention design (Self-acting): Opens/closes automatically based on pressure differential without manual intervention, preventing media backflow in real time.
Erosion and corrosion resistant structure: Constructed with alloy steel, stainless steel, or hard alloy weld overlay, suitable for sandy and acidic media environments.
Low pressure loss design: Optimized internal flow channels reduce fluid resistance and improve system efficiency.
API compliant: Designed and tested according to API 6A/16C, meeting international oil and gas project requirements.
Key Applications
Wellhead Equipment (Wellhead & Christmas Tree) Choke & Kill Manifold Fracturing and Cementing Systems Gas Injection Systems Surface Production and Testing Pipeline Systems Offshore and Subsea Production Systems
Used to prevent backflow of oil, gas, water, and fracturing fluid, and to protect pumps, compressors, and pipeline systems.
Customization
Custom pressure ratings (2K–20K PSI)
Custom size ranges (1-13/16" – 7-1/16" and above)
Custom structural forms (Lift / Swing / Dart / Flapper)
Custom connection methods (Flange / Hammer Union / Thread)
Custom material grades (AA–HH, suitable for H₂S/CO₂ environments)
Upgraded sealing materials (Abrasion-resistant / High-temperature resistant)
OEM branding customization (Nameplate / Color / Packaging)
Our Services
Pre-sales Service: Provides professional selection advice (pressure/medium/operating condition); API standard matching and certification consultation.
In-sales Service: Strict quality control (API/ISO system); Factory testing reports (pressure/sealing); Professional export packaging and logistics support.
After-sales Service: Rapid spare parts supply system; User and maintenance training support; 12-month warranty + long-term service.
FAQ
Q: What is the core function of the Wellhead Check Valve?
A: To prevent fluid backflow and protect wellhead equipment and pipeline systems.
Q: Is manual operation required?
A: No, the valve operates automatically based on fluid pressure.
Q: Does it conform to international standards?
A: It conforms to API 6A/16C standards and is suitable for global oil and gas projects.
Q: Is it interchangeable with international brands?
A: It is compatible with mainstream brands in terms of size and interface.
Q: Is maintenance complex?
A: It has a simple structure, is easy to maintain, and key components can be quickly replaced.
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