The valve specs I have worked with assign unique designations for each type of valve, which provides a shortcut designation that can be used on the drawings.
For example, I pulled out a valve spec for a water tank project I did three years ago. Under Gate Valves, I included the following types (these are the headers for the individual valve specs and came from our master valve specification):
Type V100 — Aboverground Bronze Gate Valves 3 Inches and Larger
Type V180 — Cast-Iron Resilient Wedge Gate Valve 3 Inches Through 20 Inches (AWWA C509)
Type V185 — Cast-Iron Resilient Wedge Gate Valve 4 Inches Through 36 Inches (AWWA C515) [NOTE: we gave the contractor the option of using C509 or C515 valves, but not both)
Butterfly valves, ball valves, etc had their own V-numbers, with butterflies in the 200s, balls in the 300s, and so on.
Once valve types are designated this way, call-outs on the drawings are very short because you can use just the V-number rather than a lengthy call-out. On busy drawings this makes all the difference in the world.
What it boils down to is "V130" in your case is simply the design engineer's designation for a "Resilient Seated Gate Valve." He probably got it from the master valve specification. It means nothing more than that.
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