Filtration Products

Photo of 3-Piece Filter Funnel. Whatman
Whatman 3-Piece filtering funnels are quickly dismantled and ready for the insertion of new filters. The glass sealing flanges of the funnel and reservoir are ground flat to ensure a good filter seal. All retained solids are deposited within the filter circle. The edge clamping prevents peripheral loss and possible passage of solution around, rather than through, the filter circle. The parts can be quickly and efficiently cleaned because of the simplicity of design. For quick and easy filtration, Whatman 3-Piece filter funnels are available with a choice of three plates.
Photo of Filter Funnels for Membranes. Whatman
These glass vacuum type filter funnels are ideally suited for filtration in gravimetric analysis, bacteriological controls and in biochemical applications. Available in three different funnel capacities, and with either a glass frit (GF) or S/S screen (SS). Support for either 25mm or 47mm diameter membranes.
Photo of HEPA-CAP In-Line Filters. Whatman
HEPA-CAP is a disposable in-line filter device that will retain 99.97% of all particles greater than or equal to 0.3m. HEPA filter media is used throughout the scientific, research and industrial environments to provide clean/sterile air and gases. Two sizes of these devices are available: HEPA-CAP 36 with a 625 square centimeter filter area; and HEPA-CAP 75 with a 1300 square centimeter filter area.The HEPA-CAP housing is made of durable polypropylene. The filter media is laminated hydrophobic-treated glass microfibre.
Photo of Filter Forceps w/Polypropylene Grips. Stainless Steel
Stainless steel forcep with polypropylene Finger Grips. Straight, flat tips for handling membranes or other filter types. 114mm (4.5") long.
Photo of Vac-Ring™ Filter Seal

The Vac-Ring™ seal fits Büchner funnel stems and seals off the filter flask mouth to prevent air leaks during vacuum filtration. The tapered bore fits funnel stems up to 22mm (7/8") diameter. Made of black neoprene synthetic rubber, the 7mm (3") O.D. ring also supports standard funnels on beakers.

Photo of Nalgene MF75 Rapid-Flow Sterile Disposable Filter Units

Nalgene MF75 Rapid-Flow Sterile Disposable Filter Units. Polystyrene housing. Graduations on both uppers and receivers. Leakproof 1-1/2 turn threaded screw closure provided for receiver. Units are sterile. Color coded collars by membrane type: GREEN = Cellulose Nitrate, RED = Nylon, YELLOW = SFCA. Units with receiver capacity of 500mL or larger include 12 glass-fiber prefilters.

(Sample Photo Displayed. Individual items may differ from the image shown.)


Photo of Nalgene 450-0045 Rapid-Flow Sterile Disposable Filter Units with 0.45µm CN Membrane_500mL

Use Nalgene™ Rapid-Flow™ Sterile Disposable Filter Units with CN (Cellulose Nitrate) membrane for sterile filtration, prefiltration or clarification of buffers and other aqueous solutions when protein binding is not a concern. Filter units have a green collar for easy identification of correct membrane type. Clearly marked with pore size, membrane type, catalog number, lot number and expiration date for traceablility. Padless membrane support minimizes foaming of proteinaceous samples. Leakproof screw cap eliminates pH shift in receiver bottle to provide longer life for stored fluids.

Photo of FilterCups Disposable Filter Funnels. Whatman
Convenient, easy filtration. The FilterCup is a disposable filter funnel that comes in a range of 70mm diameter filter media. This convenient device is molded from polypropylene with an integral, heat bonded filter. FilterCups offer you a choice of 3 glass microfiber and 3 cellulose filter media. These devices hold a 250mL capacity and have greater than a 31 square centimeter filtration area.They are usually used under vacuum with the FilterCup Stem (available separately). FilterCup units snap easily into and out of the stem which is compatible with filtering flasks and stoppers.
Photo of Nalgene Analytical Test Filter Funnels with CN Membrane-Sterile

Nalgene Sterile Analytical Test Filter Funnels with Cellulose Nitrate (CN) Membrane are for microbiological QC testing and analysis of water, food/beverage, raw material and finished product. The squeeze and twist funnel is easy to remove for retrieval of the CN membrane. High impact polystyrene collars are rugged for reliable performance. Meets requirements of APHA Standard Methods and EPA requirements for water quality work. 250mL sizes are useful when testing beverages that may foam. Cat. No.

Photo of Nalgene 130 Series Sterile Analytical Filter Units with CN Membrane

Use Nalgene 130 Series Sterile Analytical Filter Units with Cellulose Nitrate (CN) Membrane to recover and grow microorganisms for QC testing and analysis of water, food and beverage, raw materials and finished product. Complete, efficient filter units have an easily removable upper and filter membrane. Upper chamber snaps away from receiver for retrieval of membrane with sterile forceps. Receiver is graduated from 20 to 150mL for easy reading of sample volume.

Photo of Nalgene DS0396-0080 Filter Stoppers for Disposable Filter Units

Nalgene DS0396-0080 Filter Stoppers for Disposable Filter Units F2665.

(Sample Photo Displayed. Individual items may differ from the image shown.)



Photo of Nalgene DS0399 Stainless Steel Filter Forceps

Durable, autoclavable stainless steel construction. Designed to allow manipulation of membranes while minimizing potential damage to the membrane. Available in bent-tip and straight-tip designs. Bent-tip forceps (F2734-1) feature a unique cross-action design that lets you hold membrane without applying constant pressure.

(Sample Photo Displayed. Individual items may differ from the image shown.)


Photo of Nalgene 300 Series Reusable Filter Holders with Receiver-Polysulfone

Nalgene 300 Series Reusable Polysulfone Filter Holders with Receiver eliminate the need for a manifold and/or breakable glass vacuum flask. Receiver is graduated. Two side-arms allow connection to vacuum line; also accept syringe filters. Chamber accommodates 47 or 50mm membranes (not included). Tubing adapter can be stuffed with cotton for sterile venting; accepts 1/4-in. to 5/16-in. (6- to 8-mm) I.D. vacuum tubing. Cover allows convenient storage of sterile filtrate. WARNING! All NALGENE Filterware is for research use only, not for in vitro diagnosis or parenterals.

Photo of Nalgene DS0310 Filter Holders with Funnel-Polysulfone

Nalgene DS0310 Polysulfone Filter Holders with Funnel can be used in conjunction with any filtering flask or manifold that accepts a suitable rubber stopper with hole. Graduated upper chamber for easy sample measurement. These filter holders with funnel provide an environmentally friendly alternative to disposable filters and are washable and autoclavable.

(Sample Photo Displayed. Individual items may differ from the image shown.)


Photo of Nalgene DS0320 Reusable Bottle Top Filter Holders-Polysulfone

Nalgene DS0320 Reusable Polysulfone Bottle Top Filter Holders offers the cost savings and waste reduction of a reusable filter housing. The deep threads screw securely onto the bottle for convenient filling and vacuum filtration. The filters feature a removable sterilization membrane support plate designed to provide maximum flow rate and throughput, as well as a vacuum port on the lower half of the assembly and molded-in graduations. The polypropylene tubing adapter can be stuffed with cotton for sterile venting during autoclaving. Polysulfone is strong, washable and autoclavable.

Photo of Whatman S&S ZapCap® CR Chemical Resistant Filter Unit

ZapCap®-CR is a chemical-resistant bottle-top filter unit for filtration of medium volumes of cell culture media and HPLC solutions. Complete 500 mL units with tubing nozzle for attaching to bottles (bottle-top). Connection seals on any standard bottle with 33-45 mm neck. Membrane diameter 76 mm, filter area 39.2 cm². Polyamide membrane filters (NL) for the retention of fine particles and microorganisms in HPLC/FPLC solutions when the column packing is 10 µm. PTFE membrane filters (TE) for the retention of particles in organic solutions, strong acids or aldehydes.

Photo of Polycap™ GW Disposable Filters. Whatman
The U.S. Environmental Protection Agency (EPA) and local Departments for Environmental Protection protocols specify filtering ground water samples with a 0.45 µm filter when analyzing dissolved or suspended metals (EPA Method 3005). Specifically designed with field sampling in mind, the Whatman Polycap Ground Water sampling capsule can be used as a convenient in-line filter unit. Connects directly to outlet of a sampling pump. Large surface area optimized to provide at least 600 cm² of effective filtration area to ensure rapid sample collection.
Photo of Polycap™ HD Disposable Filters. Whatman
The Polycap™ HD (Heavy Duty) family of disposable filter capsules offers both high filtration efficiency and extreme purity due to the materials and methods of manufacture. Filter media is monofilament anisotropic polypropylene (MAPP). Four ratings, two sizes. Polycap™HD devices provide the field of laboratory filtration with an unique new tool, offering a broad capability between the gross paper filters and the microporous membranes used for absolute filtration.
Photo of Carbon Cap/HEPA Filter Devices. Whatman
Carbon Cap is a capsule filter that is filled with high-purity, high-efficiency, acid-washed, granular-activated carbon and a pleated HEPA filter. It is made specially to meet the requirements for continuous column percolation purification processes. Retains 99.97% of particles greater than 0.3 µm. Applications include: Water, chemical and reagent purification, removes noxious odors, oil mists and contaminants, compressed air lines and vacuum pumps, instrument outlet exhausts.
Photo of Polycap™ AS Disposable Capsule Filters. Whatman
Polycap AS is a unique product recommended for filtering aqueous solutions. It combines a glass microfiber (GMF) pre-filter and a nylon membrane, prolonging the life of the filter and allowing larger volumes and difficult samples to be filtered easily. This microporous membrane is inherently hydrophilic and biosafe. It also has low extractables as well as excellent flow rates. The microfibre depth media is a prefilter of unsurpassed quality. It is radiation and autoclave stable. Prefilters are included in all Polycap AS capsules to prolong the life of the device.