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 Machining |
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 Ball sizing |
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 Brazing |
| Machining
In this step, a computer-controlled lathe is used to machine a brass rod to form the valve casing. |
| Ball sizing
Here a ball is passed through the valve ports to set their inner dimensions. |
| Brazing
The port tubes are attached by brazing to the casing. The flux used in brazing is carefully cleaned off, and the internal diameter taper, the screws, and other parts are precisely machined. |
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| Machining |
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| Lapping |
| Machining
In this step, a computer-controlled lathe is used to machine a brass rod to form the rotor. |
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| Lapping
In this step the rotor and the valve casing are meticulously lapped and checked. |
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