The American Petroleum Institute (API) Implements API 6D 25th Standard

The American Petroleum Institute (API) Implements API 6D 25th Standard

From November 1, 2022, the American Petroleum Institute (API) officially starts to implement API 6D Standard, a revision from the 24th edition to the 25th edition.

What's the Difference Between API 6D and API 608 Standards for Ball Valves

What's the Difference Between API 6D and API 608 Standards for Ball Valves

The American Petroleum Institute (API) standards for ball valves include API 6D and API 608, updated in 2021. These standards provide specifications for design, manufacturing, testing, and documentati

What is the Coefficient of Flow (Cv) of Valves

What is the Coefficient of Flow (Cv) of Valves

The "Coefficient of Flow," often referred to as the "Flow Coefficient" or simply "Cv," is a measure of the efficiency of a valve in controlling fluid flow through a system. It is a dimensionless numbe

The Differences Between Swing Check Valves, Lift Check Valves, and Butterfly Check Valves

The disc of swing check valves rotates around the hinge pin inside the seat. It opens and closes automatically relying on the disc weight and fluid pressure, so as to prevent the medium backflow.

Frequently Used Valve Body Material and Corresponding Suitable Temperature

BodyMaterialStandardApplicationsSuitableTemperatureWCBASTM A216Non corrosive applications, including water, oil, gas-29℃~+425℃LCBASTM A352Low temperature-46℃~+345℃LCCASTM A352Low temperature-46℃~+345℃...

Flow Direction of Globe Valves

Globe valves are unidirectional, that is to say the flow direction is restricted.According to API 623 standard, the globe valve is designed as flow to open with the aim of flow resistance reducing and

Features of DBB and DIB Structure Ball Valves

The above drawing shows DBB structure. It is of single piston and is sealed inlet end.  The pressure can be automatically relieved for overpressure in the middle cavity, thus realizing the valve chamber an...

How to repair the galled stem?

Use a file to remove the burrs on the galled part of the valve stem. For the part with shallow galling, use a flat shovel to process it to a depth of about 1mm, and then use emery cloth or angle grinder to...

Rising Stem Gate Valve VS Non-rising Stem Gate Valve

Gate valves are widely used in pipeline systems as a shut-off device. It can be divided into rising stem gate valves and non-rising stem gate valves, and what are the differences between these two types of...

Disc Types of Gate Valves

The structure is simpler than flexible disc gate valve.Its sealing performance is not as good as flexible or double type at higher temperature.This type of disc is suitable for high-temperature medium that...

Blow-out Proof Design of O-ring in Valve Sealing

Rubber O-ring is frequently used for the purpose of sealing in hydraulic and pneumatic system due to its simple structure, light weight, low cost, convenient installation and disassembly, and especially hi...

Characteristics and Types of Valve Sealing Surface Materials

The sealing surface is a part of the valve that is easily damaged due to the fact that it is often eroded and worn by media. Its quality is a direct factor of service life of valves.

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