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The Haskel 27741‑4 is a high-performance relief valve rated for 1,000 to 10,000 PSIG, suitable for both gas and liquid service. Its stainless steel body and durable nylon sealing ensure reliable pressure relief and corrosion resistance. Factory-calibrated and locked, the valve delivers precise, repeatable relief, reducing the need for frequent adjustments. Compact and equipped with 1/4″ NPT ports, it's quick to install in tight spaces. Ideal for safety-critical systems in pneumatic boosters, cryogenics, chemical processing, and high-pressure pneumatic circuits.
- Pressure range: 1 000–10 000 PSIG; factory-set and locked
- High-grade 316 stainless steel body for corrosion resistance
- Nylon seal offering reliable leak-tight performance
- 1/4″ NPT inlet/outlet for standard plumbing connectivity
- Repeatable release behavior minimizes recalibration and maintenance
| Part Number | 27741-4 |
| Orifice Size | 0.070″ (Cv ≈ 0.12) |
| Ports | 1/4″ NPT inlet & outlet |
| Seal Material | Nylon |
| Body Material | Stainless steel |
| Weight | ~1.52 lb (0.69 kg) |
| Factory Setting | Pre‑calibrated and locked |
| Applications | Pneumatic boosters, cryogenics, gas/liquid safety relief |