How-To Guides & Tutorials

By the Yzng Trong International engineering team — we design and manufacture 316 stainless steel vacuum ball valves and KF-flanged components in Taiwan, and we answer these sizing questions from buyers every week. Last updated: 2026-07-03 Key Takeaways What Is a KF Flange? A KF flange is a quick-release vacuum flange that seals with an

How a valve attaches to the pipe is not a detail to leave to whoever is doing the install. The choice of valve end connections determines how likely the joint is to leak, how much skilled labour the installation needs, whether the line can be taken apart later, and even whether the valve is suitable

WOG stands for Water, Oil, Gas. A marking such as 1000 WOG or 2000 WOG states the valve’s maximum working pressure for water, oil, and gas under cold, non-shock conditions. The WOG pressure rating is a useful first-pass way to compare valves, but it is not proof that a valve suits your complete operating conditions.

Specify the wrong valve and you pay for it twice: once at purchase, and again every time a maintenance crew has to cut it out of the line. One of the most consequential — and most overlooked — choices in that decision is the valve’s construction. The three common ball valve body types (one-piece, two-piece

Choosing a 3-way ball valve by its port name alone is a common source of piping mistakes. Two valves can both be sold as “L-port,” yet connect their ports differently at each handle position. Before you compare prices or materials, get two documents for the exact model you are considering: the port diagram and the

TL;DR / Quick Reference Summary Screen Nominal opening Millimetres Inches First engineering check 20 mesh ≈850 µm ≈0.850 mm ≈0.0335 in Coarse debris capture with more open area and lower clogging tendency 60 mesh ≈250 µm ≈0.250 mm ≈0.0098 in Medium capture where downstream passages require finer protection 100 mesh ≈150 µm ≈0.150 mm ≈0.0059

Short answer: pick a ball valve when you need fast quarter-turn shutoff and a bubble-tight seal on small to mid-size lines; pick a gate valve for large-diameter isolation that operates infrequently, where slow closing prevents water hammer and lower per-inch cost matters. Decide by duty, not price — the two valves do not do the

“Ball valve leaking” describes at least four different problems, and they have four different fixes. Before you compare valve designs, name the leak: This article is about the third one. A welded-body 2-piece ball valve has no bolted body joint, so it reduces one potential external leak path. That is a genuine structural difference. It

Do not start actuator selection by debating pneumatic versus electric. That question comes last. Before any brand or model enters the discussion, three things have to be confirmed: Until all three are confirmed, no actuator can be selected reliably. An actuator that matches the pipe size but not the torque will stall on a sticky

A manual, a pneumatic and an electric ball valve can share the same body, the same seats and the same fluid conditions. The difference is not inside the valve. It is in who or what rotates the ball, how often it happens, and what the system should do when air or power is lost. Selection