1. Product Overview
Check valves are installed in high-pressure flowlines and manifolds to prevent reverse flow of well fluids or service fluids into upstream equipment and lines.
When reverse flow occurs, the flapper or dart inside the valve closes automatically to form a seal and provide one-way flow control.
Main components include the pressure-containing body, seat and closure member (flapper or dart), together with the model-specific bonnet, hinge or guide parts and seals. Inline flapper, top-entry flapper and dart types are separate configurations, typically with union ends.
2. Design Features
The valve body is forged from high-strength alloy steel for rated high-pressure flowline service.
Union ends permit rapid rig-up and break-out after the line has been isolated, depressurized and verified safe.
HNBR and other seal materials are supplied where specified for the ordered fluid, temperature and service environment.
Inline flapper, top-entry flapper and dart configurations are selected by flow direction, access requirements, pressure rating and line layout.
3. Check Valve Main Technical Parameters
Stated Product-Family CWP: 6,000 psi (42 MPa) to 20,000 psi (140 MPa) for inline flapper types, and 6,000 psi (42 MPa) to 15,000 psi (105 MPa) for top-entry flapper and dart types. The displayed tables list selected 15,000 and 20,000 psi models; other ratings require model-specific documentation.
Nominal Bore: 2″ to 3″
Rated Operating-Temperature Range*: -29 °C to 121 °C
Applicable Product Specification: API Spec 6A only where specified and documented for the ordered model or end connection. This statement does not imply API Monogram eligibility outside the licensed scope shown on the Certificates page.
| Model | Nominal Size | Cold Working Pressure | Overall Dimensions (mm) | Connection Type | Flow Direction | Service | ||
|---|---|---|---|---|---|---|---|---|
| L | A | H | ||||||
| 2" Fig 1502, 15,000 psi, F × M | 2" | 15,000 psi | 358 | 120 | 214 | Fig 1502 (F×M) | Standard | Standard |
| 2" Fig 1502, 15,000 psi, F × M, Reverse Flow | 2" | 15,000 psi | 358 | 120 | 214 | Fig 1502 (F×M) | Reverse Flow | Standard |
| 2" Fig 2002, 20,000 psi, F × M | 2" | 20,000 psi | 429 | 134 | 236 | Fig 2002 (F×M) | Standard | Standard |
| 3" Fig 1502, 15,000 psi, F × M | 3" | 15,000 psi | 403 | 137 | 242 | Fig 1502 (F×M) | Standard | Standard |
| 3" Fig 1502, 15,000 psi, F × M, Reverse Flow | 3" | 15,000 psi | 403 | 137 | 242 | Fig 1502 (F×M) | Reverse Flow | Standard |
| 3" Fig 2002, 20,000 psi, F × M | 3" | 20,000 psi | 578 | 189 | 356 | Fig 2002 (F×M) | Standard | Standard |
| Model | Nominal Size | Cold Working Pressure | Overall Dimensions (mm) | Connection Type | Flow Direction | Service | ||
|---|---|---|---|---|---|---|---|---|
| L | A | H | ||||||
| 2" Fig 1502, 15,000 psi, F × M | 2" | 15,000 psi | 318 | 80 | 176 | Fig 1502 (F×M) | Standard | Standard |
| 3" Fig 1502, 15,000 psi, F × M | 3" | 15,000 psi | 421 | 88 | 216 | Fig 1502 (F×M) | Standard | Standard |
| Model | Nominal Size | Cold Working Pressure | Overall Dimensions (mm) | Connection Type | Flow Direction | Service | ||
|---|---|---|---|---|---|---|---|---|
| L | A | H | ||||||
| 2" Fig 1502, 15,000 psi, F × M | 2" | 15,000 psi | 332 | 80 | 158 | Fig 1502 (F×M) | Standard | Standard |
| 3" Fig 1502, 15,000 psi, F × M | 3" | 15,000 psi | 420 | 113 | 175 | Fig 1502 (F×M) | Standard | Standard |
4. Check Valve Repair Kit
Inline Flapper Check Valve Repair Kit
① O-ring I ② Seat ③ Flapper ④ Flapper shaft ⑤ Support ring ⑥ O-ring II ⑦ Dust seal ring
Top-Entry Flapper Check Valve Repair Kit
① Support ring I ② O-ring I ③ Support ring II ④ O-ring II ⑤ Spring dowel pin ⑥ Flapper bracket ⑦ Flapper shaft ⑧ Seat ⑨ Flapper
Dart Check Valve Repair Kit
① Seal ring ② Dart ③ O-ring I ④ Dart seal ring ⑤ Seal pressing plate ⑥ Lock nut ⑦ Spring ⑧ O-ring
* Actual temperature capability depends on the documented material, elastomer, lubricant and ordered service configuration.
