What Causes Ball Float Valve Leaks in Gas Systems? | Pressure, Sealing & Material Issues
The primary cause of gas leakage is the 15% plastic deformation of the sealing seat triggered by pressure surges. A sealing ring with a hardness of Shore A 85 should be selected to prevent high-pressure permeation, but cold embrittlement failure at -20°C must be guarded against. It is recommended to control the pressure drop within […]
What Affects Ball Float Valve Lifespan in Harsh Gas Environments? | Material Quality, Contaminants, Pressure Fluctuations
In harsh gas environments, the lifespan of spherical float valves is collectively influenced by material corrosion resistance, particle erosion, and pressure fluctuations. Selecting 316L stainless steel or Hastelloy can extend service life by 2 to 3 times compared to standard materials. If the hydrogen sulfide H2S content in natural gas exceeds 10%, metal surfaces are […]
What’s the Difference Between Trunnion Mounted Ball Valves and Floating Ball Valves | Pressure Handling, Torque Requirements, Sealing Stability
Floating ball valves rely on fluid pressure to push the ball and compress the downstream seal, making them suitable for low-pressure applications below Class 300. Trunnion mounted ball valves have the ball secured by upper and lower shafts, relying on springs to actively push the seats for sealing, capable of withstanding high pressures above Class […]
Best Materials for Custom Trunnion Mounted Ball Valves in Corrosive Environments | Duplex Stainless Steel, Inconel Alloys, and Hastelloy
For chlorine-containing environments, choose 2205 duplex stainless steel with a PREN over 35; for high-temperature sulfur-containing environments, use Inconel 625 with over 58% nickel; for strong acids, pair with Hastelloy C-276. During manufacturing, the interpass temperature of the weld must be controlled below 150°C to prevent intergranular corrosion. Duplex Stainless Steel Mainly comprising UNS S32205 […]
How to Choose the Right Custom Trunnion Mounted Ball Valve | Size, Pressure Class, Application
Sizes are customized from NPS 2 to 48; full port structure is mandatory if pigging operations are required; Pressure ratings strictly adapt from Class 150 to 2500; Applications with sour media must specify sulfur-resistant materials compliant with the NACE MR0175 standard. During factory acceptance, a hydrostatic test at 1.5 times the design pressure must be […]
How to Improve Trunnion Mounted Ball Valve Durability | Surface Treatment, Sealing Technology, Alloy Materials
The sphere surface needs to be sprayed with tungsten carbide to a thickness of 0.05 mm, achieving a hardness exceeding 68 HRC to resist wear; The seal adopts a dual PEEK and metal structure, requiring regular maintenance by injecting grease through the injection valve; Under highly corrosive conditions, core internal components should be directly replaced […]
How to Choose a Trunnion Mounted Ball Valve for Industrial Pipelines | Pressure Rating, Body Material, End Connection
Pressure ratings are typically selected between Class 150 and 2500; Conventional body material is WCB carbon steel, while CF8M stainless steel is specified for corrosive media; BW (Butt Weld) ends are recommended for high pressure, and RF (Raised Face) flanges for low pressure. During installation and mating, flange bolts must be tightened in a diagonal […]
What’s the Difference Between Soft Seat and Metal Seat Side Entry Ball Valves | Temperature Range, Sealing Performance, Wear Resistance
Soft-seated side-entry ball valves (such as PTFE) are suitable for temperatures below 200°C and can achieve Class VI zero leakage, but they have poor wear resistance. The pipeline must be purged before operation to prevent particles from scratching the valve seat. Metal-seated valves (such as those with tungsten carbide coatings) can withstand high temperatures up […]
How to Select Materials for Custom Side Entry Ball Valves | Carbon Steel, Stainless Steel, Duplex Steel
Carbon steel (WCB) is suitable for water and oil at temperatures from -29 to 425°C; Stainless steel (316) resists strong acids and withstands high temperatures up to 600°C; Duplex steel (2205) features a Pitting Resistance Equivalent Number (PREN) > 32, specializing in high-chloride environments. Carbon Steel WCB cast steel and A105 forged steel provide a […]
How to Improve Side Entry Ball Valve Reliability in Pipelines | Sealing System, Stem Design, Corrosion Protection
The seal utilizes a PEEK bi-directional valve seat resistant to high temperatures up to 260°C to ensure zero leakage; The stem features an anti-blowout stepped design and is equipped with multi-stage O-rings to prevent leakage; The surfaces of core components undergo 50-micron-thick Electroless Nickel Plating (ENP) or Inconel alloy weld overlay for corrosion resistance, which, […]
