Pressure Leaf Size Charts

Vertical Filter

Dry Cake Discharge (Type DV)

24DV60 cut2

Model
Number
FILTRATION
AREA
TANK
DIA.
NO. OF
LEAVES
LEAF
SPACING
CAKE
VOL.*
TANK VOLUME MIN
HEAD ROOM
SHIPPING
WEIGHT
APPROX.
GROSS** HEEL***
ft2 (m2) in (mm) in (mm) ft3 (m3) gal (m3) gal (m3) in (mm) lbs (kg)
18DV15 15 (1.4) 18 (457) 4 3.75 (95) 1.9 (.05) 65 (.25) 35 (.13) 89 (2261) 650 (295)
24DV30 30 (2.8) 24 (610) 5 3.75 (95) 3.9 (.11) 150 (.57) 62 (.23) 95 (2413) 790 (359)
24DV60 60 (5.6) 24 (610) 5 3.75 (95) 7.5 (.21) 195 (.74) 97 (.37) 144 (3658) 910 (413)
30DV83 83 (7.7) 30 (762) 6 4.5 (114) 12.1 (.34) 225 (.85) 153 (.58) 154 (3912) 1690 (767)
30DV100 100 (9.3) 30 (762) 7 3.75 (95) 12.5 (.35) 225 (.85) 153 (.58) 154 (3912) 1780 (808)
36DV123 123 (11.4) 36 (914) 7 4.5 (114) 18.0 (.51) 310 (1.17) 220 (.83) 159 (4039) 1810 (822)
36DV140 140 (13.0) 36 (914) 8 3.75 (95) 17.5 (.50) 310 (1.17) 220 (.83) 159 (4039) 2050 (931)
42DV167 167 (15.5) 42 (1067) 8 4.5 (114) 24.4 (.69) 446 (1.69) 300 (1.14) 167 (4242) 2390 (1085)
42DV209 209 (19.4) 42 (1067) 10 3.75 (95) 26.2 (.74) 446 (1.69) 300 (1.14) 167 (4242) 2480 (1126)
48DV231 231 (21.5) 48 (1219) 10 4.5 (114) 33.7 (.95) 594 (2.25) 405 (1.53) 173 (4394) 2940 (1335)
48DV279 279 (25.9) 48 (1219) 12 3.75 (95) 34.9 (.99) 594 (2.25) 405 (1.53) 173 (4394) 3180 (1444)
54DV295 295 (27.4) 54 (1372) 11 4.5 (114) 43.0 (1.22) 768 (2.91) 513 (1.94) 178 (4521) 3880 (1762)
54DV350 350 (32.5) 54 (1372) 13 3.75 (95) 43.8 (1.24) 768 (2.91) 513 (1.94) 178 (4521) 4750 (2156)
60DV365 365 (33.9) 60 (1524) 12 4.5 (114) 53.2 (1.51) 955 (3.62) 645 (2.44) 183 (4648) 5600 (2542)
60DV429 429 (39.9) 60 (1524) 14 3.75 (95) 53.6 (1.52) 955 (3.62) 645 (2.44) 183 (4648) 5750 (2610)

 

Wet Cake Discharge (Type V)

36V253 cut2

Model Number TANK DIA. FILTRATION AREA NO. OF LEAVES LEAF SPACING CAKE VOL.* TANK VOLUME SHIP WEIGHT APPROX.
SCREEN FABRIC GROSS** HEEL***
ALLOY FABRIC in (mm) ft2 (m2) ft2 (m2) in (mm) ft3 (m3) gal (m3) gal (m3) lbs (kg)
18V21 18V27 18 (457) 21 (2.0) 27 (2.5) 5 2.375 (60) 1.42 (.04) 49 (.19) 28 (.11) 640
(291)
18V29 18V37 18 (457) 29 (2.7) 37 (3.4) 7 1.875 (48) 1.36 (.03) 49 (.19) 28 (.11) 660
(300)
24V45 24V55 24 (610) 45 (4.2) 55 (5.1) 8 2.375 (60) 3.04 (.08) 97 (.37) 50 (.19) 790
(359)
24V59 24V75 24 (610) 59 (5.5) 75 (7.0) 11 1.875 (48) 2.76 (.07) 97 (.37) 50 (.19) 835
(379)
24V93 24V110 24 (610) 93 (8.6) 110 (10.2) 8 2.375 (60) 6.29 (.17) 132 (.50) 85 (.32) 1250
(568)
24V123 24V138 24 (610) 123 (11.4) 138 (12.8) 11 1.875 (48) 5.76 (.16) 132 (.50) 85 (.32) 1310
(595)
30V159 30V183 30 (762) 159 (14.8) 183 (17.0) 11 2.375 (60) 10.76 (.30) 209 (.79) 135 (.51) 1620
(735)
30V193 30V212 30 (762) 193 (17.9) 212 (19.7) 13 1.875 (48) 9.05 (.25) 209 (.79) 135 (.51) 1750
(794)
36V232 36V253 36 (914) 232 (21.6) 253 (23.5) 13 2.375 (60) 15.70 (.44) 330 (1.25) 195 (.74) 1850
(840)
36V300 36V338 36 (914) 300 (27.9) 338 (31.4) 17 1.875 (48) 14.06 (.39) 330 (1.25) 195 (.74) 1980
(899)
42V325 42V370 42 (1067) 325 (30.2) 370 (34.4) 16 2.375 (60) 22.00 (.62) 427 (1.62) 265 (1.00) 2450
(1112)
42V413 42V464 42 (1067) 413 (38.4) 464 (43.1) 20 1.875 (48) 19.36 (.54) 427 (1.62) 265 (1.00) 2610
(1185)
48V430 48V481 48 (1219) 430 (39.9) 481 (44.7) 18 2.375 (60) 29.11 (.82) 582 (2.21) 360 (1.36) 3100
(1407)
48V547 48V609 48 (1219) 547 (50.8) 609 (56.6) 23 1.875 (48) 25.64 (.73) 582 (2.21) 360 (1.36) 3500
(1589)
54V545 54V603 54 (1372) 545 (50.6) 603 (56.0) 20 2.375 (60) 39.90 (1.04) 843 (3.19) 455 (1.72) 4100
(1861)
54V683 54V760 54 (1372) 683 (63.5) 760 (70.6) 25 1.875 (48) 32.01 (.96) 843 (3.19) 455 (1.72) 4850
(2202)
60V675 60V742 60 (1524) 675 (62.7) 742 (68.9) 22 2.375 (60) 45.70 (1.29) 1009 (3.82) 575 (2.18) 5650
(2565)
60V855 60V951 60 (1524) 855 (79.4) 951 (88.3) 28 1.875 (48) 40.04 (1.13) 1009 (3.82) 575 (2.18) 6300
(2860)

 

Horizontal Leaf (Type VH)

Bristol Closedclone contrast

Model Number TANK DIAMETER FILTRATION AREA TANK VOLUME CAKE VOLUME NO. OF LEAVES SHIPPING WEIGHT APPROX.
in (mm) ft2 (m2) gal (m3) ft3(m3) lbs (kg)
24VH21 24 (610) 21 (1.95) 80 (.30) 2.63 (.07) 10 1300 (590)
24VH32 24 (610) 31.5 (2.93) 93 (.35) 3.94 (.11) 15 1375 (624)
36VH52 36 (914) 51.7 (4.80) 210 (.79) 6.46 (.18) 11 1800 (817)
36VH94 36 (914) 94 (8.73) 240 (.91) 11.75 (.33) 20 1920 (871)
42VH99 42 (1067) 99 (9.20) 350 (1.32) 12.38 (.35) 15 2430 (1103)
42VH139 42 (1067) 138.6 (12.88) 375 (1.42) 17.33 (.49) 21 2500 (1134)
48VH169 48 (1219) 169.2 (15.72) 382 (1.45) 21.15 (.60) 18 3100 (1407)
48VH207 48 (1219) 206.8 (19.21) 458 (1.73) 25.85 (.73) 22 3300 (1497)

 

Horizontal Filter

Dry Cake Discharge (Type DHC)

48DHC 2cut

Model Number FILTRATION
AREA
TANK DIAMETER NO. OF LEAVES LEAF* SPACING GROSS TANK VOLUME SHIPPING WEIGHT APPROX.
ft2 (m2) in (mm) in (mm) gal (m3) lbs (kg)
36DHC47 46.8 (4.35) 36 (914) 6 4 (102) 210 (.79) 2250 (1021)
36DHC62 62.4 (5.79) 36 (914) 8 3 (76) 210 (.79) 2350 (1066)
36DHC78 78.0 (7.24) 36 (914) 10 4 (102) 278 (1.05) 2500 (1134)
36DHC101 101.4 (9.42) 36 (914) 13 3 (76) 278 (1.05) 2650 (1202)
48DHC120 120 (11.14) 48 (1219) 8 4 (102) 461 (1.74) 4100 (1860)
48DHC165 165 (15.33) 48 (1219) 11 3 (76) 461 (1.74) 4280 (1942)
48DHC195 195 (18.11) 48 (1219) 13 4 (102) 584 (2.21) 4380 (1987)
48DHC225 225 (20.90) 48 (1219) 15 3 (76) 584 (2.21) 4550 (2064)
60DHC304 303.6 (28.20) 60 (1524) 12 4 (102) 909 (3.44) 4645 (2130)
60DHC354 354.2 (32.90) 60 (1524) 14 3 (76) 909 (3.44) 4750 (2155)
60DHC405 404.8 (37.60) 60 (1524) 16 4 (102) 1100 (4.16) 4895 (2220)
60DHC506 506 (47.00) 60 (1524) 20 3 (76) 1100 (4.16) 5050 (2291)
72DHC613 612.8 (56.93) 72 (1829) 16 4 (102) 1500 (5.68) 5300 (2405)
72DHC843 842.6 (78.27) 72 (1829) 22 3 (76) 1550 (5.87) 5825 (2643)
72DHC996 995.8 (92.50) 72 (1829) 26 3 (76) 1700 (6.43) 6200 (2813)
72DHC1302 1302.2 (120.97) 72 (1829) 34 3 (76) 2100 (7.95) 7000 (3176)

 

Wet Cake Discharge (Type HC)

60HC650

Model Number FILTRATION AREA TANK DIAMETER NO. OF LEAVES LEAF SPACING GROSS TANK VOLUME SHIPPING WEIGHT APPROX.
ft2 (m2) in (mm) in (mm) gal (m3) lbs (kg)
36HC74 73.6 (6.84) 36 (914) 8 2.5 (64) 190 (.72) 2365 (1073)
36HC110 110.4 (10.25) 36 (914) 12 2 (51) 210 (.79) 2480 (1125)
36HC147 147.2 (13.67) 36 (914) 16 2.5 (64) 280 (1.06) 2750 (1248)
36HC184 184 (17.09) 36 (914) 20 2 (51) 280 (1.06) 2820 (1279)
48HC208 207.6 (19.28) 48 (1219) 12 2.5 (64) 450 (1.70) 4255 (1930)
48HC277 276.8 (25.71) 48 (1219) 16 2.5 (64) 550 (2.08) 4435 (2012)
48HC346 346 (32.14) 48 (1219) 20 2.5 (64) 640 (2.42) 4745 (2153)
48HC415 415.2 (38.57) 48 (1219) 24 2.5 (64) 720 (2.73) 4795 (2175)
60HC440 440 (40.87) 60 (1524) 16 3 (76) 930 (3.52) 4975 (2257)
60HC550 550 (51.09) 60 (1524) 20 3 (76) 1110 (4.20) 5325 (2416)
60HC660 660 (61.31) 60 (1524) 24 3 (76) 1270 (4.81) 5440 (2468)
60HC770 770 (71.53) 60 (1524) 28 3 (76) 1435 (5.43) 5740 (2604)
72HC826 826 (76.73) 72 (1829) 20 4 (100) 2000 (7.57) 5950 (2699)
72HC1074 1073.8 (99.75) 72 (1829) 26 4 (100) 2200 (8.33) 6825 (3097)
72HC1322 1321.6 (122.77) 72 (1829) 32 4 (100) 2400 (9.08) 7100 (3221)
72HC1569 1569.4 (145.79) 72 (1829) 38 4 (100) 2600 (9.84) 7675 (3482)

Durco Filters Pilot Scale Testing

EP-470-Mobile-Pilot-Press
P-350 EP470 Mobile Filter
QP-Pilot
QP-470 Pilot Filter
Pilot-Dryer
Pilot Sludge Dryer
P-241-Pilot
P-241 Vertical PLF Pilot
P-257-Pilot
P-257 Horizontal PLF Pilot

Sampling of Pilot Unts Available (Not Shown in Relative Scale)

For new or difficult applications, we can conduct Pilot-Scale Testing at your process plant site.  Our pilot filters can accurately simulate your process on a small scale, or even take a side stream. Your optimal solution can be determined and realistic cost projections can be developed. We have pilot filters of all our filter types and will be able to provide the right pilot to suit your needs. We also recommend securing on of our Field Service Technicians to accompany the pilot unit and assist with your pilot testing.

Units are typically rented for 4-weeks to allow plenty of time for setup, testing, analysis, results and cleanup.  If you have a need for a longer test period, our Pilot Program Manager will be happy to assist you.  Special long-term rental pricing may apply.

For Pilot-Scale Testing

Call +1.716.693.9381 extension 153
or e-mail This email address is being protected from spambots. You need JavaScript enabled to view it. 

 
P-202 Pressure Nutsche
P202-Nutsche
P-203 Mobile Vertical PLF
P-203-Pilot
 P-167 3-Tube External BW Pilot
P-167 3-Tube External BW Pilot
P-175 4-Tube External BW Pilot
P-175 4-Tube Pilot Filter 
P-199 3-Tube External BW
P-199 Enlarged 

Pressure Leaf Filters Operation

Pressure leaf filters work by feeding a liquid (dirty influent) into a pressure vessel under pressure. The liquid passes through filter leaves leaving behind the solids in the form of a cake. The filtered liquid (filtrate, or clean effluent) exits the filter through the manifold connecting all the filter leaves. The filter cake is then discharged from the vessel either by sluicing with a separate liquid or as a dry solid via vibration. 

Cut Section of a Typical Horizontal Pressure Leaf Unit

Pressure Leaf Cut Away

Pressure Leaf Filters Operation Leaves Pressure Leaf Filters Operation Cake On Leaves
The leaves inside a Horizontal Pressure Leaf Filter are shown with the shell open. Cake has just been discharged from the filter. It is ready to be put back on line by closing the shell. Filter cake deposited on the leaves prior to discharge.

Cake Discharge Methods

Depending on how the solids need to be handled or the nature of the solids, the filter cake can either be discharged as a dry solid or as wet cake slurry.

Dry Cake Discharge

To discharge the cake as a solid, a vibrating mechanism is used to shake the filter cake off of the leaves. In order for the cake to leave the vessel the shell must be retracted. A Quick Open Closure (QOC) is often used to make shell retraction safe and fast. Once the shell is open the cake is vibrated into a hopper for recovery or disposal.

Wet Cake Discharge

When the solids are hazardous or easily disposed of in liquid form, the filter cake can be washed from the leaves and discharged. The DuraSluiceTM sluicing system efficiently washes the cake from the leaves using nozzles on a rotating header.

Pressure Leaf Options DuraSluice
 DuraSluiceTM Header and Spray Nozzles

Semi-Automatic Pressure Leaf Filters

These filters feature a central control panel for sequence step activation. The various pump drives, agitator drives and valves are automatically activated to the required mode for the process step.

Fully Automated Pressure Leaf Filters

These filters feature either touch-screen programmers or programmable controllers, which are used to ensure that each process step is activated automatically. Flow rate and turbidity may, if required, be monitored. Various options are available such as main panel graphics, manual overrides, alarms, remote terminal boxes, station wiring and completely piped and wired skid-mounted systems.

Next: Horizontal Filters (Jump to Vertical Filters)

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Pressure Leaf Filters Applications

Durco Filters Pressure Leaf systems perform exceptionally well in many applications.  The following a very general listing of some of the most common.  We've also provided links to further information on a select few. 

Food/Beverage

Juice, Beer, Sugar, Vinegar, Edible Oil, Wine, Vegetable Oil, Sweeteners

Petro Refining/Production

Amine (MEA, DEA, TEG), Catalyst Fines Removal, Cooling Water, Frac Water

Metal Finishing/Steel

Pickle Liquor, Electrolyte, Electrogalvanizing Solution, Lithium Processing

Mining

Merrill Crowe Gold Recovery (Clarifiers), SXEW Solutions, Soda Ash, Pregnant Liquor (Solutions) - Copper, Nickel, Zinc, Molybdenum, Lead, Indium, Cobalt, Carbon Fines Removal

Acid

H2SO4, HCL, Nitric, Phosphoric, Terephthalic, Stearic

Brine

Brine KCL, NaCl, Chlorate, Brine Muds

Molten Sulfur

Dark, light, or bright sulfur

Various

Sodium Thiocyanate, Sodium Hypochlorite, Tallow, Carbon Removal, Fly Ash, Condensate, Catalyst Removal, 50% Sodium Hydroxide, Sodium Silicate, Potable Water, Water Flooding, (Produced Water),

Biodiesel, Chlor-Alkali, Pharmaceutical