Mermade 30" x 60" Centre Bottom Outlet, Leaf Only

The Mer-Made 30" × 60" Center Bottom Outlet — Leaf Only (cataloged as the Bare Leaf, Skeleton, or Core Assembly) consists of the fully assembled rigid structural perimeter frame, internal high-flow drainage grid, and center-bottom discharge hub, excluding the fabric filter jacket (cover) and compression felt sealing collar/gasket.

This configuration is engineered for deep municipal competition vaults, Olympic natatoriums, water parks, and high-capacity surge-tank vacuum filtration arrays measuring 30" wide horizontally across the base by 60" high vertically (5-foot nominal vertical span). It is specified when existing fabric filter bags are being reused or sourced from bulk roll stock, or when replacing cracked, bowed, warped, or calcified PVC/CPVC structural frames while maintaining the full 25.0 sq. ft. per-leaf active filtration surface area.

Technical Specifications & Scope of Delivery

• Internal open-matrix polypropylene or ABS 5-foot vertical/diagonal drainage grid core

• Molded, chemical-resistant Schedule 80 PVC center-bottom discharge hub with integrated stop shoulder | | Excluded Components | • Fabric filter bag / cloth jacket (Cover Only)

• Top closure hardware, laces, or Velcro flap

• High-density felt compression collar (Part # FELTCOLLAR) |

Structural Design & Internal Core Mechanics

• 5-Foot High-Flow Drainage Matrix: Heavy-duty, open-profile polypropylene or ABS drainage core with reinforced cross-ribbing engineered to withstand continuous negative vacuum draw up to 15" Hg without inward deflection or hydraulic throttling over the full 60" vertical run. Internal drainage paths route liquid smoothly from the upper corners and perimeter channels directly down toward the central bottom outlet port.

• Columnar-Reinforced Perimeter Framing: Heavy-wall extruded rigid CPVC/PVC structural channels with thermo-welded corner miter joints. The 60" vertical side stiles incorporate internal corner gusseting and increased cross-sectional stiffness to resist bowing, racking, and twisting under the substantial lateral weight of wet DE cake accumulation (frequently exceeding 30 lbs wet cake per leaf).

• Molded Center Discharge Hub: Heavy injection-molded Schedule 80 PVC spud thermo-welded directly to the center of the 30" bottom rail. An integrated locating stop shoulder establishes uniform seating depth in the floor manifold receiver and ensures square, positive compression on the sealing gasket.

Physical Dimensions & Weight Estimates

• Individual Bare Leaf Net Weight: Approximately 15.0 to 18.0 lbs (6.8 to 8.2 kg).

• Single Boxed Leaf Shipping Weight: Approximately 23.0 to 27.5 lbs (10.4 to 12.5 kg) in oversized, double-wall corrugated cartons with perimeter edge and corner protectors.

• Master Pallet Lot (10 to 20 Bare Frames): Approximately 235 to 415 lbs (107 to 188 kg) freight-banded to an extended 34" × 66" wooden skid.

Field Clothing & Installation Steps

1. Inspect Core Surface: Check the outer channel borders and bare grid faces across the full 60" span for sharp burrs, rough weld beads, or cracks that could snag or puncture a replacement fabric jacket during sleeving.

2. Slide the Cover: With two installers supporting the 5-foot frame, slide the replacement fabric envelope down over the 60" height along the 30" width, guiding the reinforced center cutout over the protruding bottom discharge spud.

3. Seat the Spud Cutout: Pull the reinforced collar of the cover snugly around the base of the outlet hub until seated flush against the molded locating shoulder without bunching or twisting.

4. Tension & Close: Pull the fabric upward evenly across the 30" × 60" face from both sides to eliminate wrinkles or bagging (loose cloth over a 5-foot height permits DE cake bridging, sagging, and premature sloughing under vacuum). Fasten the top closure flap (Velcro seam, clamp bar, or laces) across the 30" upper rail.

5. Mount Gasket & Seat: Slide a fresh high-density felt compression collar (Part # FELTCOLLAR) over the center spud against the locating shoulder. Lower the re-covered leaf vertically into the vault floor manifold socket, apply firm downward pressure to compress the seal, and secure the overhead hold-down beam.