Wafer Check Valves K-Value Match in Crane TP-410

I am trying to model the loss coefficient (Cv or K value) through a non-slam wafer check valve (as it's specified in my job). I see that there are a few different types of check valves that Crane's TP-410 paper provides loss coefficients for the following valves. I used a 8" size for the fittings. Some of the fittings appear to use a RSeater Diameter modifier. However, I'm not sure what the RSeat Diameter is.

[ul]
[li]Foot - Hinged Disc; K = 1.055[/li]
[li]Foot - Vertical Disc; K = 5.91[/li]
[li]Lift Check - Angled; K = 0.7739; Modified by RSeat Diameter[/li]
[li]Lift Check - Vertical; K = 8.443; Modified by RSeat Diameter[/li]
[li]Stop Check - 90°Removed Plug; K = 0.7739; Modified by RSeat Diameter[/li]
[li]Stop Check - 90°Cage 45°Seat; K = 4.925; Modified by RSeat Diameter[/li]
[li]Stop Check - 90°Cage Vertical Seat; K = 2.814; Modified by RSeat Diameter[/li]
[li]Stop Check - Angled; K = 2.814; Modified by RSeat Diameter[/li]
[li]Stop Check - Globe; K = 5.629; Modified by RSeat Diameter[/li]
[li]Stop Check - Inline; K = 0.7739; Modified by RSeat Diameter[/li]
[li]Stop Check - Y, Cage Guided; K = 4.222; Modified by RSeat Diameter[/li]
[li]Stop Check - Y, Removed Plug; K = 0.7739; Modified by RSeat Diameter[/li]
[li]Swing Check - Angled; K = 1.407[/li]
[li]Swing Check - Vertical; K = 0.7036[/li]
[li]Tilting Disc - Alpha = 15°; K = 1.689[/li]
[li]Tilting Disc - Alpha = 5°; K = 0.5629[/li]
[/ul]

Given the preceding list and corresponding table of K- values, what check valve type do y'all think a wafer check valve (slam or non-slam, and dual or single) would most closely correspond to?