F-F-351F
DIFFERENTIAL PRESSURE
GAUGE
ELEMENT PRESSURE
DROP TO BE MEASURED
.0625 IN.
TOP SEALING PLATE MUST
IN A MANNER AS
SEAL AROUND CENTER
SHOWN
TUBE.
LEAKAGE NOT TO
OPTIONAL COVER
EXCEED .5% OF
DESIGN
RATED FLOW AT 12 PSI
DIFFERENTIAL
.0625 IN. HOLES-
PRESSURE
A
BURRED
LIQUID TIGHT PLUG
IN CENTER TUBE
C
AREA OF HOLES IN
D
CENTER TUBE AT
LEAST EQUAL TO
FREE AREA OF
B
SEALING PLATE MUST BE
INLET CONNECTIONS
ATTACHED TO CENTER
TUBE WITH LIQUID
TIGHT JOINT
OUTLET
INLET
OPTIONAL BOTTOM DESIGN
DIMENSIONS IN INCHES(MM)
HOUSING
SPRING
MIN.
MAX. VOLUME.
PRESSURE
CLASS
A
B
C
D
PIPE
CUBIC INCH.
TOTAL LOAD
(± 1%)
MIN.
MIN.
SIZE
(CUBIC
IN POUNDS
CENTIMETER)
(KILOGRAMS)
1
3.94
0.75
3.38
2.00
0.25
80 (1311)
35 (16)
(100)
(19)
(85.9)
(50.8)
(6.4)
2
4.81
0.75
4.38
2.50
0.375
120 (1966)
50 (23)
(122.2)
(111.3) (63.5)
(9.5)
3
9.06
1.38
5.25
2.25
0.75
290 (4752)
75 (34)
(230)
(35)
(133.4) (57.2)
(19)
4
18.00
2.38
8.50
4.00
1.5
1500 (24 580)
100 (45)
(457)
(60.5) (215.9) (101.6) (38)
NOTE: SPRING PRESSURE TOLERANCE ± 5% WHEN SEALING PLATES ARE SPACED
DIMENSION A.
FIGURE 1. Test filter body for type IV filter elements.
15
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