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2. Gate valve - Wikipedia

   en.wikipedia.org/wiki/Gate_valve

   Gate valves may have flanged ends drilled according to pipeline-compatible flange dimensional standards. Gate valves are typically constructed from cast iron, cast carbon steel, ductile iron, gunmetal, stainless steel, alloy steels, and forged steels. All-metal gate valves are used in ultra-high vacuum chambers to isolate regions of the chamber ...

3. List of valves - Wikipedia

   en.wikipedia.org/wiki/List_of_valves

   Rotary valves and piston valves: parts of brass instruments used to change their pitch; Rotolock valve; Rupture disc: a one-time-use replaceable valve for rapid pressure relief, used to protect piping systems from excessive pressure or vacuum; more reliable than a safety valve; Saddle valve: where allowed, is used to tap a pipe for a low-flow need

4. Valve - Wikipedia

   en.wikipedia.org/wiki/Valve

   According to API Standards 600, "Steel Gate Valve-Flanged and Butt-welding Ends, Bolted Bonnets", the trim consists of stem, seating surface in the body, gate seating surface, bushing or a deposited weld for the backseat and stem hole guide, and small internal parts that normally contact the service fluid, excluding the pin that is used to make ...

5. Stopcock - Wikipedia

   en.wikipedia.org/wiki/Stopcock

   Special stopcocks are available, such as a double-oblique or three-way design used in Schlenk lines which permit the application of inert gas and vacuum from the same stopcock. [4] Stopcocks are often parts of laboratory glassware such as burettes, separatory funnels, Schlenk flasks, and columns used for column chromatography. The stopcock is a ...

6. Trickle valve - Wikipedia

   en.wikipedia.org/wiki/Trickle_valve

   Trickle valves can be used only on systems operating under negative pressure. The vacuum created inside the dust collector holds the valve closed, allowing a head of material to build up above the trickle valve. Once the pressure of the material equals the negative pressure of the system, the valve is forced open and a trickle of material will ...

7. Ultra-high vacuum - Wikipedia

   en.wikipedia.org/wiki/Ultra-high_vacuum

   To save time, energy, and integrity of the UHV volume an airlock or load-lock vacuum system [6] is often used. The airlock volume has one door or valve, such as a gate valve or UHV angle valve, [7] facing the UHV side of the volume, and another door against atmospheric pressure through which samples or workpieces are initially introduced. After ...