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Vacuum Diatomaceous Earth (D.E.) Filter Assembly - Bottom Outlet
Vacuum Diatomaceous Earth (D.E.) Filter Assembly
Vacuum Diatomite Filter Assemblies for Pool, Municipal and Industrial Applications
MER-MADE Vacuum D.E. assemblies can be installed in space about 1/4 the size required for sand filters of the same capacity. In both operation and maintenance, the vacuum diatomite method is simpler to install, lower in cost and uses the least horsepower of any filter.

MER-MADE Filter Leaves
Heart of the filter assemblies are the patented MER-MADE filter leaves, which are fabricated of chemically inert, high impact styrene.

MER-MADE filter leaves are rigid, strong and non-warping and feature a unique corrugated drainage pattern. The outlet and gasket assure a leakproof seal against the matching adaptor on the filtered water discharge manifold.

MER-MADE Polypropylene Filter Leaf Covers
Made of woven linear polypropylene, the filter leaf cover is designed to lie completely flat on all points of the leaf for uniform precoating. Unlike tight weaves or solid felts, the polypropylene's slick surface allows quick cake discharge. The openness of the weave speeds cleaning. All edges are sealed to prevent unraveling. A polyester closure facilitates field replacement.
  • Specifications
  • Images
  • Outlet Drawings
  • Tank Packaged D.E. Systems
  • D.E. Bag Tray
  • Parts

LEAVES
The bottom drain rectangular Mer-Made filter leaf shall consist of a filter chamber connected to a bottom discharge outlet, both of which shall be fitted with a filter cover. The filter chamber shall be (A) high X (B) wide fabricated of high impact styrene. Leaf filtering area shall be a nominal (C) square feet and (D) square feet as rated by NSF. It shall be vacuum formed in two identical halves which are butted and joined over the entire contact area to form a rigid, non-warping structure. Each half shall contain (E) drainage channels parallel to the (A) side. There shall be (F) drainage holes of 3/16" diameter, one at the base of each channel. These drainage holes shall be drilled through the side wall of a (G) X (H) closed tubular collection channel which shall carry the unrestricted flow to the leaf outlet. The leaf outlet shall be blow-molded of high impact ABS plastic. It shall be bonded to the outer edge at the mid-point of that closed tubular collection channel that has been drilled with drainage holes. This bottom drain outlet shall have a diameter of (I). 1-3/8" of an inch up from the edge outlet there shall be a bulbous flange, which when fitted with a flat synthetic gasket 1/4 of an inch wide, provides a positive seal against the clear water discharge manifold. Recognizing proper design practice of not exceeding 6 FPS, the outlet velocity is (J) FPS at a flow rate of two GPM per square foot of filter area.

FILTER COVERS
For vacuum filtration, the filter cover shall be made of woven monofilament linear polyethylene style #6112. A synthetic collar shall be sewn to the cover and placed over the bulbous portion of the outlet permitting the cover to lie completely flat on all points of the filter chamber. The cover shall be sewn on two sides with Dacron thread. The sides opposite the outlet shall have an easy opening Velcro closure for on-site installation, maintenance or replacement.

MANIFOLD

The clear water discharge Mer-Made manifold shall consist of a pipe with an open flanged end and a closed end. The manifold shall contain one manifold to outlet adapter for each vacuum filter leaf which is to be installed, and be held firmly in place by means of support clamps along its length. The manifold shall be schedule 80 PVC pipe. At a maximum flow rate of two gallons per minute per square foot of filter area, 6" IPS pipe shall be used up to 300 square feet of filter, 8" IPS pipe up to 500 square feet, and 10" IPS up to 1120 square feet, the flange shall be a 150# slip ring style, shipped loose for final field adjustment.

ADAPTERS

For use with (A) high X (B) wide Mer-Made leaves, adapters shall be placed on (K) inch centers, solvent cemented to the manifold. They shall be molded ABS plastic and have an inside diameter of (L). Each adapter shall contain a flat 11/16 of an inch wide flange which shall surround the leaf outlet and provide a sealing surface for the outlet gasket.

ADJUSTABLE MANIFOLD SUPPORTS
One Mer-Made support clamp shall be installed for every eight (8) leaves along the length of the manifold. These clamps shall serve to support, hold down and stabilize the manifold to assure proper sealing at the leaf outlet. Each support clamp shall contain a cradle support and clamping rod whose radius shall be suitable for the pipe size being used. The center line of this support clamp shall be adjustable from 6" to 13-1/2" to facilitate installation in sloped bottom filter tanks. Supports to be manufactured of 304 stainless steel.

HOLD DOWN ASSEMBLY

The leaf hold down assembly shall serve to pressure seat the leaf outlet and outlet washer in the discharge manifold and assure uniform spacing between leaf faces. It shall consist of two stainless steel angle bars with holes drilled over the location of each leaf. Inserted in each hole is an individual adjustable clamp for each leaf. Clamp to consist of a PVC clip with a threaded stainless steel rod. The end of each bar shall be bolted to a stainless steel wall clip mounted permanently on a suitable vessel wall. Each wall clip shall be provided with stainless steel bolts, wall lags and shields for mounting.

CHART FOR FILLING IN MER-MADE SPECIFICATIONS

A B C D E F G H I J K L
24 36 12 - 34 68 1-1/2 1-3/8 1-3/4 3.1 4 1-25/32
36 24 12 - 22 44 1-1/2 1-3/8 1-3/4 3.1 4 1-25/32
30 36 15 12.8 34 68 1-1/2 1-3/8 1-3/4 3.9 4 1-25/32
24 45 15 13.1 43 86 1-1/2 1-3/8 1-3/4 3.9 4 1-25/32
38 48 25 23.0 45 90 1-7/8 1-11/16 2-11/16 2.8 5 2-23/32
30 60 25 22.5 57 114 1-7/8 1-11/16 2-11/16 2.8 5 2-23/32
48 60 40 37.5 57 114 1-7/8 1-3/4 2-11/16 4.4 5 2-23/32

NOTE: ALL FIGURES ARE INCHES EXCEPT "J" WHICH IS FEET PER SECOND


Vacuum D.E. Filter Assembly - Bottom Outlet
Vacuum D.E. Filter Assembly
Bottom Outlet
Vacuum D.E. Filter Assembly - Vertical Edge Outlet
Vacuum D.E. Filter Assembly
Edge Outlet
Pool Vacuum D.E. Filter - Detail of Leaf Outlet
Pool Vacuum D.E. Filter
Leaf Outlet Detail
Pool Vacuum D.E. Filter - Leaf Outlet
Pool Vacuum D.E. Filter
Outlet Data
Bottom Outlet Drawing


Vacuum Diatomaceous Earth Filter - Bottom Outlet Drawing

LEAF L WIDTH HEIGHT*
24 x 45 No. of leaves X 4" + 7-1/2" 45" 33"
30 x 36 No. of leaves X 4" + 7-1/2" 36" 39"
38 x 48 No. of leaves X 5" + 7-1/2" 48" 47"
30 x 60 No. of leaves X 5" + 7-1/2" 60" 39"
48 x 60 No. of leaves X 5" + 7-1/2" 60" 57"

* Based on 8" manifold.


Edge Outlet Drawing


Vacuum Diatomaceous Earth Filter - Edge Outlet Drawing

LEAF L WIDTH HEIGHT*
24 x 45 No. of leaves X 4" + 7-1/2" 64" 27"
30 x 36 No. of leaves X 4" + 7-1/2" 55" 33"
38 x 48 No. of leaves X 5" + 7-1/2" 67" 40"
30 x 60 No. of leaves X 5" + 7-1/2" 79" 32"
48 x 60 No. of leaves X 5" + 7-1/2" 79" 51"

* Based on 8" manifold.


Bottom Double Outlet Drawing


Vacuum Diatomaceous Earth Filter - Double Bottom Outlet Assembly
Edge Outlet - Large Leaf

Vacuum Diatomite Filter - Fiberglass Tank Packaged D.E. System (Edge Outlet - Large Leaf)

GENERAL NOTES
Tank laminate is constructed of alternate layers of fiberglass fabric and resin.
A "C-glass" surfacing veil shall be used.
Resin System shall be a general purpose resin suitable for the service conditions.
Construction shall be in the hand lay-up method in accordance with NBS PS 15-69 Voluntary Product Standard.
Flanges shall be drilled to 150# ASNI standard.
Dimensional variations shall be plus or minus 1/8" for all dimensions.
Drain and overflow connections to be standard PVC socket weld fittings.
Tank requires full bottom support.
Flange bolt holes shall straddle north-south centerlines.
Nozzle "B" must have minimum height of 12", maximum height no greater than 34". Nozzle "B" can also be located on the 72" side of the tank if desired. Baffle must be between inlet port and filter leaves.

Bottom Outlet - Large Leaf

Vacuum Diatomite Filter - Fiberglass Tank Packaged D.E. System (Bottom Outlet - Large Leaf)

GENERAL NOTES
Tank laminate is constructed of alternate layers of fiberglass fabric and resin. A "C-glass" surfacing veil shall be used.
Resin System shall be a general purpose resin suitable for the service conditions.
Construction shall be in the hand layup method in accordance with NBS PS 15-69 Voluntary Product Standard.
Flanges shall be drilled to 150# ASNI standard.
Dimensional variations shall be plus or minus 1/8" for all dimensions.
Drain and overflow connections to be standard PVC socket weld fittings.
Tank requires full bottom support.
Flange boltholes shall straddle north-south centerlines.
Nozzle "B" must have minimum height of 12", maximum height no greater than 34". Nozzle "B" can also be located on the 72" side of the tank if desired. Baffle must be between inlet port and filter leaves.
Edge Outlet - Small Leaf

Pool Diatomaceous Earth Filter - Fiberglass Tank Packaged D.E. System (Edge Outlet - Small Leaf)

GENERAL NOTES
Tank laminate is constructed of alternate layers of fiberglass fabric and resin.
A "C-glass" surfacing veil shall be used.
Resin System shall be a general purpose resin suitable for the service conditions.
Construction shall be in the hand lay-up method in accordance with NBS PS 15-69 Voluntary Product Standard.
Flanges shall be drilled to 150# ASNI standard.
Dimensional variations shall be plus or minus 1/8" for all dimensions.
Drain and overflow connections to be standard PVC socket weld fittings.
Tank requires full bottom support.
Flange bolt holes shall straddle north-south centerlines.
Nozzle "B" must have minimum height of 12", maximum height no greater than 16". Nozzle "B" can also be located on the 72" side of the tank if desired. Baffle must be between inlet port and filter leaves.
Bottom Outlet - Small Leaf

Pool Diatomaceous Earth Filter - Fiberglass Tank Packaged D.E. System (Bottom Outlet - Small Leaf)

GENERAL NOTES
Tank laminate is constructed of alternate layers of fiberglass fabric and resin.
A "C-glass" surfacing veil shall be used.
Resin System shall be a general purpose resin suitable for the service conditions.
Construction shall be in the hand layup method in accordance with NBS PS 15-69 Voluntary Product Standard.
Flanges shall be drilled to 150# ASNI standard.
Dimensional variations shall be plus or minus 1/8" for all dimensions.
Drain and overflow connections to be standard PVC socket weld fittings.
Tank requires full bottom support.
Flange boltholes shall straddle north-south centerlines.
Nozzle "B" must have minimum height of 12", maximum height no greater than 16". Nozzle "B" can also be located on the 72" side of the tank if desired. Baffle must be between inlet port and filter leaves.
D.E. Bag Tray

Pool DE Filter - Bag D.E. Tray

D.E. Bag Piercer

Pool DE Filter - Mer-Made D.E. Bag Piercer

D.E. Body Feeder

Pool DE Filter - Mer-Made D.E. Body Feeder




Mer-Made Assembly Parts

D.E. Filter - Manifold with Adaptors Manifold with Adaptors
The PVC filtered water discharge manifold comes with a fitted adaptor for each filter leaf, an end plug and flange. The adaptors and end plug are supplied attached. The flange is supplied loose. Manifold size is selected for each project, based on maximum system flow.
D.E. Filter - Leaf Clamp Assembly Leaf Clamp Assembly
The leaf clamp assembly assures precise spacing and individual leaf removal using permanent positioning clamps mounted on angles. All metal parts are stainless steel including mounting clips, nuts, bolts and lags.
D.E. Filter - Manifold Support Clamps Manifold Support Clamps
Manifold support clamps have adjustable legs suitable for sloped bottom tanks. One manifold support clamp is recommended for every eight leaves in a filter bank. Fiberglass is standard. Stainless steel is also available.