5 Must-Have Features in a surface safety valve price

Maximize reliability and performance with innovative seal technology for oil and gas wells

Surface-controlled subsurface safety valves (SCSSVs) are critical components of well completions, preventing uncontrolled flow in the case of catastrophic damage to wellhead equipment. Fail-safe closure must be certain to ensure proper security of the well. However, this is not the only function in which it must be reliable&#;the valve must remain open to produce the well. Schlumberger surface controlled subsurface safety valves exceed all ISO and API Spec 14A requirements for pressure integrity, leakage acceptance criteria, and slam closure.

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Through decades of innovation and experience, Schlumberger safety valve flapper systems are proven robust and reliable. The multizone dynamic seal technology for hydraulic actuation of subsurface safety valves is a further improvement in reliability performance when compared with traditional seal systems in the industry.

The multizone seal technology was developed and proved with exhaustive verification and validation of reliability, longevity, and performance. The validation methodology utilized a unique sapphire crystal bore, enabling the design team to view the seal&#;s dynamic and static performance in real time while simulating wellbore pressure and temperature conditions.

The multizone seal technology is currently available in the GeoGuard high-performance deepwater safety valves, which is validated to API Spec 14A V1 and V1-H.

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Use these valves for emergency relief for liquids, gases or clean steam where pressures must be relieved quickly to reduce damage that could result from overpressure in a system. Where the overpressure needs to be controlled more gradually, such as in back pressure or pump bypass applications use our Backpressure valves which will reduce the probability of pressure spikes that often occur when relief valves are selected for pressure control applications. Valve should only be used selectively where the materials chosen are compatible with the fluid used and will not cause corrosive buildup or crystallization in the close clearances between the piston and body bore, which could keep the poppet from opening freely. Use only clean, strained, or filtered liquids or gases so that the valve can operate without buildup of debris or solid matter which can cause the valve to malfunction. A strainer or filter with the appropriate perf or mesh and pressure rating can be purchased from Straval. Apply only where the discharge piping is not subjected to a high back pressure, as this may affect the relief setting. If the back pressure is steady or constant, compensating for the change in set pressure can be simply made by readjusting the spring load, or by using a different spring selection, or selecting a different valve type designed for this. 

Although these valves are designed to 600 psig (~40 barg) there are light weight clamps that are rated to only 100 psig ~7 barg). Therefore the user must install the proper clamp with the appropriate pressure and temperature rating that will safely contain the pressure in the piping system. Clamps are not sold with the valves and must be supplied by others.

Although 316SS wetted materials are standard for sanitary and pharmaceutical applications, type 303SS can be selected for non-sanitary or non-pharmaceutical applications where the compact Quick Clamp or Tri-Clamp compatible connections  are desirable for their easy and quick removal compared to the threaded NPT connections or the much larger and more costly bolted ANSI Flanges.

Standard metal seated valves meet ANSI/FCI Class IV seat leakage standards (0.01% of rated valve capacity, not bubble tight). Select soft seat options as indicated in the pricing pages below.

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