Pressure Relief Valves come in a variety of sizes and shapes, but they all serve the same purpose -- venting a build-up of pressure from a vessel. And I don't think we need any proof, whether that be 80, 100, or something else, as to the effectiveness of these valves, as they have literally proven themselves effective for centuries.
The type of pressure relief valve is a matter of both preference and application. Some applications may require a manual valve, one in which the user must manually activate it, while others prefer an automatic valve, or something initiated by something or someone else. And size certainly does matter when it comes to pressure relief valves. Some only have a 1 or 2 ounce capacity, some will handle 12 ounces, and for a lot of pressure build-up, one might even rely on a 16 or 24 ounce capacity valve. And some valves are rather adaptable to different circumstances, such as the very flexible boiler-maker valve. It can be a 1 ounce capacity, a 12 ounce, or a mixture of the two!
One has to be cautious, however, about the potential for back pressure build-up with these various valves, especially when they're used too often. They can, after all, result in a discharge of gas, from either the upper or lower discharge vent, that may or may not be particularly pleasant to those in the immediate vicinity. And you do have to be very careful with the ones that have the adjustable blowdown, as they might have a tendency to cause a bit of seat leakage. And maintaining a good system balance with these valves is critical. You never want to let off too much pressure without supplying the system with an adequate amount of sustenance, or else a serious imbalance will occur.
Another consideration is the type of connection the valve has. You have your screwed connection, your plugged connection, your clamped connection, and you even have the inter-connected ones that might have a tube from the vessel to the outlet. And the required flow capacity is certainly a factor in determining the type of connection you choose, because we don't want too much or, heaven forbid, too little flow to deal with.
Something else you'll have to be careful with is when you activate the pressure relief valves remotely. Often times the return flow will be interfered with by one of those pesky steam tramps, and then the return flow might even end up diverted entirely.
But regardless of your valve of preference, they are all sure to vent whatever pressures may build-up in your vessel.
