It seems you're discussing a combination of features related to oil unloading connectors and API standards, with a specific mention of an API dust cover. Let me clarify and consolidate the information you provided into a more coherent sentence or paragraph:
The APL oil unloading connector is designed with a focus on optimizing the API valve and incorporating a rapid coupling system. This ensures safety during oil unloading operations by facilitating quick and secure connections and disconnections. The connector adheres to API standards, including API 1004, which specifies requirements for various connectors and interfaces. Additionally, the system incorporates an API dust cover as a secondary seal, which, when in the locked state, tightly seals against the rotating head surface. This dust cover is designed to withstand the rigors of transportation and is operated with ease using a single handle. It not only seals effectively to maintain pressure but also retains its shape even if mishandled, thanks to its lightweight yet pressure-resistant construction.
| model | WDYJG | WDYJDGE | WDYJDGF |
| Specification | 4" | 4" | 4" |
| Work pressure | 0.6MPa |
| Manipulation | Manually |
| temperature range | -20~+70°C |
| Connection method | Flange |
| Use medium | Diesel, gasoline, kerosene |
| Package Size | 62×44×42cm | 45×45×33cm | 45×45×33cm |
| net weight | 20kg | 27kg | 24kg |
| Heavy hair | 22kg | 29kg | 26kg |
| Package | 24 pieces/carton | 24 pieces/carton | 24 pieces/carton |