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The BuTech 20SC9 O-Ring Check Valve provides reliable one-way flow control through 9/16" medium-pressure tubing, preventing backflow in high-pressure fluid and gas systems. Constructed from 316 cold-worked stainless steel, it withstands pressures up to 20,000 psi (1,380 bar) and maintains seal integrity with a Buna-N standard O-ring (optional Viton, Teflon, Kalrez). Compact and robust, it’s ideal for instrumentation, sampling loops, and high-pressure manifolds, offering a dependable and durable solution in critical applications.
- Prevents backflow in 20,000 psi medium-pressure systems
- Compact, rugged 316-SS body suitable for harsh environments
- Standard Buna-N O-ring (options: Viton, Teflon, Kalrez)
- 9/16" OD tube inlet/outlet for seamless tubing integration
- Metal spring seat ensures reliable reseating after flow stops
| Model | 20SC9 |
| Valve Type | O-Ring Check Valve (Tube × Tube) |
| Tube Connection Size | 9/16" OD (Medium Pressure) |
| Maximum Pressure | 20,000 psi (1,380 bar) |
| Materials | Body: 316 Cold-Worked Stainless Steel; Spring: 300-Series Stainless Steel; O-Ring: Buna-N (standard); Viton and PTFE optional |
| Cracking Pressure | ~15 psi (1 bar) standard; configurable up to 100 psi |
| Temperature Range | Buna-N: –65 °F to +250 °F; Viton: –40 °F to +500 °F; PTFE: –320 °F to +400 °F |
| Dimensions (L × Hex) | 4.23" × 1.38" |
| Approx. Cv | 2.30 |
| Finish | Polished Stainless Steel |