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2. Valve seat - Wikipedia

   en.wikipedia.org/wiki/Valve_seat

   Valve seats are often formed by first press-fitting an approximately cylindrical piece of a hardened metal alloy, such as Stellite, into a cast depression in a cylinder head above each eventual valve stem position, [1] and then machining a conical-section surface into the valve seat that will mate with a corresponding conical section of the ...

3. Valve guide - Wikipedia

   en.wikipedia.org/wiki/Valve_guide

   Valve guides are typically shaped in a tube with a flare at one end. Their replacement involves removing the worn part by driving it out with a hammer and specifically-shaped punch. Installation may involve shrink-fitting , heating the cylinder head and cooling the valve guide so as to ease insertion, then driving the new guide in quickly with ...

4. Valve job - Wikipedia

   en.wikipedia.org/wiki/Valve_job

   A valve job is the colloquial term for resurfacing the mating surfaces of the poppet valves and their respective valve seats that control the intake and exhaust of the air/fuel mixture in four stroke internal combustion engine, replacing valve oil seals, replacing any deficient valve springs, and otherwise bringing the components of a cylinder head up to manufacturer’s spec. [1] A ...

5. Oxy-fuel welding and cutting - Wikipedia

   en.wikipedia.org/wiki/Oxy-fuel_welding_and_cutting

   The torch is the tool that the welder holds and manipulates to make the weld. It has a connection and valve for the fuel gas and a connection and valve for the oxygen, a handle for the welder to grasp, and a mixing chamber (set at an angle) where the fuel gas and oxygen mix, with a tip where the flame forms.

6. The 8 best tools to make pasta from scratch

   www.aol.com/news/8-best-tools-pasta-scratch...

   This set, which has a 4.6-star average rating from over 4,200 reviews on Amazon, includes a rolling textured pasta cutter for cutting multiple pieces of ravioli at once, as well as individual ...

7. Multi-seat valve - Wikipedia

   en.wikipedia.org/wiki/Multi-seat_Valve

   Multi-seat valve with pneumatic actuator. Multi-seat valves, or multi-port valves, are used to shut off or control complex liquid flows in sterile areas in the beverage and food industry as well as in the fine chemical and pharmaceutical industry. Multi-seat valves often replace combinations of several single-seated valves in aseptic processing.