Key Factors to Consider Before Buying an Industrial Ball Valve | connection type, operating pressure, application media
For highly corrosive media, 316L is recommended with a PTFE seat rated to 200°C. Check the operating pressure carefully. If system pressure exceeds 10 MPa, threaded connections must be avoided and replaced with flanged connections to prevent leakage. In actual operation, the handle must be turned a full 90 degrees in one motion to either […]
Common Industrial Ball Valve Failures and How to Prevent Them | leakage issues, seat wear, improper operation
Internal leakage in ball valves and seat wear are often caused by improper operation. To prevent this, the valve must always be rotated the full 90 degrees to the fully open or fully closed position. It must never be left partially open for throttling, as high-velocity flow can erode and damage the valve body. For […]
How to Choose an Industrial Ball Valve for High-Pressure Applications | pressure rating, valve material, sealing performance
When selecting a high-pressure ball valve, prioritize Class 1500 to Class 2500 pressure ratings. The body material should be forged F316L steel to withstand extreme mechanical stress, and the sealing system must use high-pressure-resistant PEEK or a metal hard seal with a tungsten carbide-coated surface to ensure zero leakage. Before installation, a hydrostatic pressure test […]
Flanged Ball Valve vs Threaded Ball Valve: Which One Is Better for Your Project? | installation method, sealing performance, application range
Threaded ball valves are suitable for pipelines up to DN50. Installation is straightforward: wrap the threads with PTFE tape and tighten. Their pressure rating is about 68 bar. Flanged ball valves are designed for high-pressure systems above DN50. They require a gasket and diagonal cross-tightening of the bolts. With pressure resistance up to 420 bar, […]
How to Maintain a Flanged Ball Valve in Crude Oil Service | routine inspection, seal protection, operating practice
Flanged ball valves in crude oil pipelines must be kept either fully open or fully closed. Throttling at a 45-degree half-open position is strictly prohibited, as it allows impurities to scour and damage internal components. Routine inspections should be carried out every 3 to 6 months. Cleaning fluid and grease should be injected through the […]
Flanged Ball Valve vs Butterfly Valve in Chemical Pipelines | corrosion resistance, flow control, installation space
In chemical service, flanged ball valves can handle pressures up to 16 MPa, use PFA lining for strong corrosion resistance, and create virtually zero flow resistance. Butterfly valves are only about one-third the face-to-face length of ball valves, making them far more space-efficient. Both operate with a 90-degree turn, but ball valves excel at tight […]
Why Flanged Ball Valves Are Preferred in Chemical Processing Systems | leak prevention, easy maintenance, secure flange connection
By tightening 4 to 8 flange bolts in a cross-pattern sequence and pairing them with a PTFE seal ring, the connection can withstand system pressures of up to 50 bar and keep the pipeline leak-tight. The flange connection is extremely secure, and during routine maintenance, operators can remove the entire valve simply by unbolting it, […]
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 […]
