Why the Fisher D4 is Such a Reliable High-Pressure Valve
If you've spent any time working around oil and gas production sites, you've probably run into the fisher d4 more times than you can count. It's one of those pieces of hardware that just seems to be everywhere, and for good reason. When you're dealing with high-pressure fluids and gases, you don't want something flimsy or overly complicated. You want something that can take a beating and keep on ticking, and the D4 has earned a reputation for being that reliable "workhorse" in the field. ...