Zero Hold Filter Press

Liquid is fed under positive pressure and travels downward through openings on the sides of the filter plates. The filter media retains foreign particles while clear filtrate passes into a central channel formed by interlocking pressure cups leading to the outlet. Filtration continues until the cake-holding capacity is saturated or the filtrate rate slows due to cake resistance. The reverse-flow design (typically bottom-to-top) leaves virtually no residual liquid.

Key advantages include high-efficiency single-pass clear filtration, significantly reduced product loss (critical for costly materials), easy operation and maintenance with quick batch changeovers, compliance with GMP and FDA standards, and versatility for both small- and large-scale production.

Salient features include maintenance that can be performed without fully lifting the cartridge, construction to the latest engineering standards, availability in plate diameters of 4, 8, 14, 18, 24, and 33 inches, options for centrifugal/gear/lobe pumps, fitted pressure gauge, safety valve and air vent, crystal-clear filtration, minimum hold-up of unfiltered slurry, all contact parts in SS 304/316/316L, and a high degree of finish on contact surfaces.

All contact parts are made of high-quality stainless steel (SS 304, SS 316, or SS 316L) for corrosion resistance, hygiene, and GMP compliance. The plates and overall enclosed design ensure contamination-free operation suitable for pharmaceutical and related industries.

It is widely used in the pharmaceutical, nutraceutical, herbal, Ayurvedic, biotech, cosmetic, and chemical industries—particularly where high-value liquids, purity, and minimal product loss are essential.

Core components include a reverse-flow mechanism (unfiltered liquid enters from the bottom via a central channel and clean filtrate exits from the top), a series of horizontal stainless-steel plates with filter media (pads or cartridges), an enclosed design that retains cake and solids with zero residual liquid, and supporting elements such as pumps, pressure gauges, safety valves, and air vents. No scavenger arrangement is required.

Models are offered with plate diameters of 8″, 14″, 18″, and 24″ (and others), varying numbers of plates, output rates from approximately 250 LPH to over 21,000 LPH (based on water with 5% activated carbon and polypropylene cloth), different filtering areas, cake-holding capacities, motor sizes (1–5 HP), and pump sizes. Actual filtration rates depend on liquid viscosity, filter media quality, and sediment nature. Power voltage can be adjusted to customer requirements.

Traditional presses often leave residual liquid due to top-to-bottom flow. The Zero Hold model uses a reverse (bottom-to-top) flow and interlocking pressure cups so that virtually no unfiltered slurry remains in the chamber or dome after filtration. This maximizes yield, reduces chemical waste, and is especially valuable for expensive or hazardous fluids.

Yes. Maintenance can often be performed without fully lifting the cartridge. The machine features easy operation, quick batch changeovers, high-finish contact surfaces, and an enclosed design. It is engineered for GMP and FDA compliance, making it suitable for regulated industries that require hygiene, operator safety, and contamination control.