![](http://www.alamy.com/thumbs/6/8207FFE6-1A25-44F6-A824-5CD6759E04DA/2X6B119.jpg)
it about the ball valve of plie that normally close and normally open
Size: 6000px × 4000px
Photo credit: © Kollayut Jantawong / Alamy / Afripics
License: Royalty Free
Model Released: No
Keywords: actuation, adjustment, application, automation, ball, closed, configuration, construction, control, design, durability, efficiency, fixture, flexibility, flow, fluid, functio, functionality, infrastructure, inspection, installation, integrity, maintenance, management, mechanism, monitoring, open, operation, performance, pipeline, plumbing, position, pressure, rate, regulation, reliability, repair, safety, shut-, system, technology, upgrade, valve, versatility, water