Well shoot, I glossed over that line in Table 1 apparently. I have not seen PSVs between regulators and actuators, but as you can probably tell from my initial question there are many things I have not seen. That gives me enough information to sort out my issue though. Thanks!
Hi all,
My plants instrument air header is designed for 150 psi and operates at around 100 psi. The IA is then typically let down to 50 psi or so by a small regulator when used for valve actuators or pneumatically driven pumps. I assume that if you connect a typical control valve diaphragm...
Hi all,
I have come across a conventional relief valve that has challenged my understanding of API 520, so I am here to ask for some insight.
Set Pressure: 2500 kPag
Constant Superimposed Back Pressure: 2100 kPag
Variable Superimposed Back Pressure: 20 kPag
Built-Up Back Pressure: negligible...
As many of us are aware, ASME Sec VIII Div 1 UG-136(a)(3) requires relief valves in air, water exceeding 140°F (60°C), and steam service to have a lifting lever. My question is does anyone know why these specific services require a lifting lever but not others?
I am aware of code case 2203, in...
Has anyone heard of oversizing insulation on a deadleg to provide an air gap between the piping and the insulation? I'm evaluating a project to cut off a nuisance 2" drain off a 20" high pressure steam header. My plan is to cut it off as close as possible to the header and cap with a closure...
