The Spring Closed Lever Operated Ball Valve is a high-performance floating ball valve engineered for critical fail-safe applications. Specifically designed with a spring-return mechanism, this valve automatically returns to the closed position upon the release of the manual handle, ensuring immediate shut-off during emergency shutdowns or operator release to prevent hazardous leaks and enhance plant safety.
Constructed from premium F44 (UNS S31254 / 254SMO) super-austenitic stainless steel, this valve offers exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking. It is the ideal solution for the most aggressive environments, including seawater handling, chemical processing, and chloride-rich industrial media where standard stainless steels would fail.
| Nominal Diameter | 1/2″ ~ 4″ (DN15 ~ DN100) | Pressure Class | Class 150 LB (Max 285 psi @ 100°F) |
|---|---|---|---|
| Body Material | F44 / 254SMO (UNS S31254) | Operation Type | Manual Lever with Spring Return (Fail Close) |
| Design Standard | API 608 / BS 5351 / GB/T 12237 | Connection Type | Flanged (ASME B16.5), Threaded, Socket Weld |
| Temperature Range | -20°C to +200°C (Depending on seat) | Testing Standard | API 598 / ISO 5208 |
| Sealing Material | PTFE / RPTFE / TFM / Metal (Stellite) | Cycle Life | Minimum 10,000 cycles |
F44 material with PREN > 43 provides superior protection against chlorides and seawater pitting.
Spring-return mechanism ensures the valve closes in under 2 seconds upon handle release.
High-precision floating ball and PTFE soft seats ensure bubble-tight sealing for critical media.
Engineered with a secure stem design to prevent accidental discharge under high pressure.
Clear handle positioning provides immediate visual confirmation of open/closed status.
Fully compliant with ASME B16.5, API 608, and ASTM A182 global industrial standards.
Full traceability of F44 heat numbers and ASTM A182 compliance reports.
Spring force is factory-calibrated to overcome differential pressure.
Rigorous shell and seat hydrostatic testing per API 598 standards.
Tested for 10,000+ cycles to ensure long-term spring reliability.
Fast dispatch of standard sizes (1/2" to 4") to minimize downtime.
Dedicated engineering team for customized spring force requirements.
| Feature | Standard SS316 Valve | Savvy F44 Spring-Return Valve |
|---|---|---|
| Corrosion Life | Moderate (Pitting Risk) | Extreme (High PREN > 43) |
| Safety Level | Manual Only | Fail-Safe Automatic Closure |
| Maintenance | Frequent Seal Replace | Extended Life (F44 Stability) |
| Emergency Response | Dependent on Operator | Instantaneous Spring Action |
| TCO (5-Year) | Higher (Due to replacements) | Lower (Superior Durability) |
F44 has a much higher molybdenum content (6-6.5%) and a PREN value over 43, making it significantly more resistant to pitting and crevice corrosion in seawater and high-chloride environments compared to SS316.
The valve uses a calibrated stainless steel spring. When the operator releases the manual lever, the stored energy in the spring automatically forces the ball to the closed position within seconds, regardless of power status.
We offer Flanged (ASME B16.5 Class 150 RF), Threaded (NPT), Socket Weld (ASME B16.11), and Butt Weld (ASME B16.25) connections to suit various piping requirements.
Yes. While PTFE/RPTFE are standard, we provide PEEK for higher temperatures or Stellite-faced metal seats for extreme severe service applications up to 400°C.
Yes, NACE MR0175 / MR0103 compliance is available as an optional feature for valves operating in sour service environments.
The spring is housed in a protective SS304 casing. Periodic visual inspection of the handle and spring housing is recommended, though the system is designed for a minimum of 10,000 cycles without failure.
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