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. The 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 leak-proof seal against the matching adapter 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.
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.
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.
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.
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
NOTE: ALL FIGURES ARE INCHES EXCEPT “J” WHICH IS FEET PER SECOND
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|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.
|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.
|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.
Vacuum D.e Filters are extremely efficient and capable of capturing much smaller particulate matter than most sand filters. The system takes up less space than sand filters but can accommodate the same pool capacities. They are easy to install, use less water to backwash and provide the highest water quality of any system. Flanged PVC manifold, stainless steel leaf clamps, hold down bars, manifold support clamps, high-impact polyVacuum D.e Filters are extremely efficient and capable of capturing much smaller particulate matter than most sand filters. The system takes up less space than sand filters but can accommodate the same pool capacities. They are easy to install, use less water to backwash and provide the highest water quality of any system. Flanged PVC manifold, stainless steel leaf clamps, hold down bars, manifold support clamps, high-impact polystyrene filter leaves, and woven polypropylene fabric covers are provided for installation into Mer-Made’s fiberglass or concrete tanks. Each system is custom designed based upon the gallonage of the pool. styrene filter leaves and woven polypropylene fabric covers are provided for installation into Mer-Made’s fiberglass or concrete tanks. Each system is custom designed based upon the gallonage of the pool.
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