How to Choose the Right Flanged Ball Valve for Industrial Pipelines | pressure rating, flange standard, valve material
First verify the operating pressure rating (such as PN16) and the flange standard (ASME B16.5) to ensure the bolt spacing matches exactly. Then select the body material based on the medium: WCB carbon steel for standard water and gas service, and 316L stainless steel for corrosive fluids. Before installation, use calipers to measure the outside […]
What Are the Key Testing Requirements for API 6D Ball Valves | Shell Test, Seat Test, Functional Test
During the API 6D ball valve testing, the shell hydrostatic test requires pressurization to 1.5 times the design pressure, holding the pressure for at least 3 minutes with zero leakage; The seat test uses 1.1 times the water pressure or 0.6 MPa air pressure to detect internal leakage; The functional test requires 3 consecutive full […]
How to Extend the Service Life of an API 6D Ball Valve | Proper Material, Regular Inspection, Correct Operation
To extend the lifespan of API 6D ball valves, Inconel 625 weld overlay materials should be selected for highly corrosive conditions. Routine maintenance must strictly execute ultrasonic thickness measurements and grease injection every 6 months. They must be kept in a fully open or fully closed state; it is strictly prohibited to open them slightly […]
Which is Better: Trunnion Mounted vs Floating API 6D Ball Valve? | Torque, Pressure Performance, Valve Size
The overall performance of trunnion ball valves is generally superior. Floating ball valves rely on fluid thrust to press the ball for sealing, making them suitable for low-pressure applications of 6 inches and below Class 300. Under high pressures, their operating torque becomes exceptionally large and they are prone to wear. The ball of a […]
How to Reduce Leakage Risks with the Right API 6D Ball Valve | Seat Design, Seal Material, Pressure Balance
For standard operating conditions, PTFE soft-seated valves are used; for high-temperature and abrasive media, tungsten carbide metal hard seats with a hardness exceeding HRC 65 are selected. Pressure balancing requires a Single Piston Effect (SPE) design, achieving automatic pressure relief when the body cavity pressure exceeds 1.33 times the nominal value. Daily operations require regularly […]
How to Select Materials for Custom API 6D Ball Valves | Carbon Steel, Stainless Steel, Duplex Steel
For conventional oil and gas, select carbon steel WCB, suitable for -29 to 425°C; For corrosive media, select stainless steel 316; For high-pressure sour offshore conditions, use duplex steel 2205 with a PREN value over 35 to resist pitting corrosion. Carbon Steel For operating conditions between -29°C and 425°C, ASTM A216 WCB (cast) or A105 […]
Ball Float Valve Selection Mistakes That Can Increase Water Waste | Wrong Sizing, Poor Sealing, Delayed Shutoff
Undersized float valves cause a closing delay of over 10 seconds, resulting in a single overflow of 3 liters; Inferior seals are prone to leakage under 0.5 MPa water pressure. Strict 1:1 sizing matching the pipe diameter is required, paired with a Shore hardness 70 EPDM O-ring, and the static water level must be set […]
Custom Ball Float Valve Materials Explained for Different Environments | Brass, Stainless Steel, Plastic
Brass is suitable for civil water systems, bearing pressures of 1.6 MPa and temperatures of 120°C; 316 stainless steel specializes in corrosive chemical environments, with pressure resistance up to 6.4 MPa; Plastics (such as PVC) are ideal choices for electroplating tanks, provided temperature and pressure are strictly limited to within 60°C and 1.0 MPa, respectively. […]
Why Custom Ball Float Valves Matter in Natural Gas Processing | Reliability, Pressure Tolerance, Lifespan
Custom float valves can withstand high pressures up to 25 MPa in natural gas processing. The float counterweight must be precisely calibrated based on a specific gas gravity of 0.65 to prevent malfunction in liquid level control. This ensures extreme reliability at the API 6D level, significantly extending the system’s Mean Time Between Failures (MTBF) […]
How to Choose a Custom Ball Float Valve for Natural Gas Systems | Material, Pressure Rating, Seal Integrity
Custom natural gas float valves must prioritize Inconel alloys to prevent sulfur corrosion. The selected pressure rating must exceed the system peak by 20%, and PEEK seals should be used to ensure ANSI Class VI zero leakage across a wide temperature range. A hydrostatic test at 1.5 times the design pressure must be performed for […]
