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Technical Information

Operating Temperature/Pressurefor 150 psi Rated Products (Except Filter Housings)
Operating temperature/pressure chart for 150 psi products

Operating Temperature/Pressurefor 225 psi Rated Products

Operating temperature/pressure chart for 225 psi products

Operating Temperature/Pressurefor Bag & Cartridge Filter Housings

Operating temperature/pressure chart for bag filters

Notes:
1. Working pressure (non-shock figures are the maximum recommendedfor the indicated pressure.
2. It is recommended that the minimum process fluid temperaturefor the Hayward product not fall below 34F.

PressureLoss Calculation Using Cv Factor
Pressure loss calculation formula
The pressure loss across a valve or filter can
be calculated using the system's flow rate and
the Cv factor for that valve or filter.
For example, a 1" valve with a Cv factorof 8
will have a 4 psi pressure loss in a system with
a 16 gpm flow rate (16 / 8)2 = 4

Conversion Factors
ToObtain:
MultiplyBy:		Pound
Sq. In.		Pound
Sq. Ft.		AtmosphereKilogram
Sq. Cm.		 Inch
Water		 Foot
Water		Inch
Mercury		 mm
Mercury		 Bar
Pound/Sq. In.
Pound/Sq. Ft.
Atmosphere		 1
0.0069545
14.696		144.0 
1
2116.22		 0.068046
0.000473
1		0.070307 
0.000488
1.0332		27.7276 
0.1926
407.484		 2.3106
0.01605
33.9570		2.0360 
0.014139
29.921		51.7150 
0.35913
760.0		 0.06895
0.000479
1.01325
Kilograms/Sq.Cm.
Inch Water
Foot Water		14.2233 
0.03607
0.43278		2048.16 
5.194
62.3205		 0.96784
0.002454
0.029449		1 
0.00254
0.03043		394.27 
1
12.0		 32.864
0.08333
1		28.959 
0.0734
0.8811		735.558 
1.865
22.381		 0.9807
0.00249
0.02984
Inch Mercury
mm Mercury
Bar		 0.49115
0.019337
14.5038		 70.726
2.7845
2088.55		 0.033421
0.0013158
0.98692		 0.03453
0.0013595
1.0197		13.617
0.5361
 33.51		1.1349
0.04468
402.1 		1
0.03937
29.53		25.40
 1
750.0		 0.03386
0.001333
1

To convert from one unit to another, locate the startingunit in the left hand column. Multiply by the factor shown horizontallyto the right under the desired unit.

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