Amtrol WX-401, 420 manual To Recap, Step One Step Two Step Three, Step Four, Step Five, Step Six

Determine pre-charge pressure

(P1); pump cut-in pressure (P2) and pump cut-out pressure (P3) from pump curve of pump selected for system.

Determine ESP Volume (Average GPM x run time) From pump curve:

Determine AF:

Step Three: Calculate Acceptance Factor (AF)

Remember our formula for calculating the acceptance factor (AF) for diaphragm tanks?

Step Six: Select Well-X-Trol®Model that is Equal to or Greater Than “Tv”.

If ASME construction is not required, select from 420 series, Table 1.

AF = 1 -

30 + 14.7

78 + 14.7

This example would be a WX-425.

To Recap:

AF = .518

Step Four: Maximum Acceptance Factor Verification

After calculating the acceptance factor (AF), we must compare the value to the maximum acceptance factors shown in Table 1. In the case of our example, an AF of 0.518 is less than the maximum acceptance factor of all WX-420 +

WX-450 series models. Therefore, either series can be used.

We went through six steps to size a full acceptance Well-X-Trol®to gain maximum acceptance:

Step One

Step Two

Step Three

Step Five: Calculate Minimum Total						P2 + 14.7
Volume (Tv) of Full Acceptance					1 -
						P3		+ 14.7
Well-X-Trol®
Remember the formula:				Step Four	Verify the calculated AF is less
	ESP Volume
					than or equal to the maximum
TV =					acceptance factor for the Well-X-
		AF
	196				Trol® required.
TV =			= 378 gallons	Step Five	Calculate total Well-X-Trol®
	.518				Volume:
							ESP Volume
					TV -
								AF
				Step Six	Select series 420 or 450 Well-X-
					Trol® Model

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