Snyder Industries 120 Gallon XLPE Chemical Feed Station Tank

Standing over the pump on a bunded floor

The floor under this station has more to do than hold a tank up. It carries a 56 by 43 inch base at 67 inches of height, which is a taller load on the same footprint, and it has to be flat, continuous and level under the whole stand: a finished chemical room floor, a coated slab, a poured pad, or the deck of a bund sized for the contents of the largest vessel in it. Never two rails with the middle unsupported, never packed up at one corner to take a slope out of the floor, and never a temporary position "until the pad is poured". Level the floor, set the station, then plumb it. Above that base is 1,001 pounds of water at full and 1,902 pounds at the rating on this sheet, standing higher than a floor tank would put it, which is exactly why the base has to be right. Then use the height you have paid for. Set the metering pump below the tank's discharge on its own base so it runs on a flooded suction through the whole batch rather than lifting from a tank sitting on the floor; leave enough clear space under the tank that a torch and a pair of eyes can get all the way round it, because the first sign of trouble on a chemical station is a stain under the base and not a puddle at the door; and keep the drain path to a carboy or a sump short and falling. The fill point moves up with the tank, so plan for that as well: at 67 inches the lid is above chest height on most people, which is fine for a coupled delivery line and awkward for a drum pump wand. Check the charge against the duty in the tank sizing calculator before you order, take the reserve and thermal freeboard from the tank sizing guide, and where the containment strategy is still being argued, the Snyder Captor containment comparison is the piece that sets an integrally contained tank against a built bund honestly.

With the stand at 67 inches, without it at 51

The comparison that decides this purchase is the first and third rows, and it is a height decision rather than a capacity one. Both hold 120 gallons on the same 56 by 43 inch plan. This one is listed at 67 inches and 166 pounds; SII-5700103CF42 is listed at 51 inches and 130 pounds. Everything you are buying is in that gap: the pump can sit under the discharge, the drain can reach a container, and the underside of the tank is visible. Everything you are giving up is in the same gap: a higher fill point, a taller crate, a higher centre of mass on the same footprint, and more weight to place. Buy this one when the dosing pump is fixed at floor level and must not lift. Buy the floor tank when the ceiling, a duct or a mezzanine limits the height, or when the fill has to be done by hand from a drum. SII-5700104CFWS45 is listed at exactly the same 56 by 43 by 67 inches and 166 pounds as this one, and the sheet gives the difference as the wall: this part is the cross-linked polyethylene one, and that is the one to specify when the chemistry or the handling is hard on a tank. The other two rows are the same plan at other charges, 90 gallons at 41 inches and 99 pounds, or 150 gallons at 62 inches and 138 pounds, both floor-standing; if you want one of those on a stand, ask, because the stand and no-stand versions are separate part numbers and we would rather order the right one than explain the wrong one.

Comparing against another maker? Send the competing spec to 866-418-1777 or a quote request and we will show the differences honestly.

Working height first: what 67 inches gives the suction

• The discharge and the valve: this sheet publishes no outlet fitting, so no size, no valve type and no bulkhead assembly is named here. Tell us the chemical and the pump when you order and the discharge arrangement is confirmed with the maker in writing before the station ships.
• What the height does for the pump: with the tank standing at 67 inches, the metering or transfer pump goes below the discharge on its own base, with a short falling run into the suction, so the column above keeps it flooded to the end of the batch. That is the entire argument for buying the version with the stand, and it is worth laying the pump out on paper before the station arrives.
• Isolation and protection: valve at the tank, flexible connector at the first joint, cleanable strainer before the pump, and a low level float or probe that stops the pump with liquid still above the fitting.
• Filling: the lid is 14 inches, now at 67 inches off the floor. Bring the delivery to a coupling at working level rather than passing a hose up to the lid, and if the lid has to be opened routinely, plan a step or a small platform with a hand rail into the layout instead of improvising one later.
• Venting: the vent path stays clear at all times. A drawing pump under a closed lid pulls on the wall, and the taller the standing liquid the more inviting it is to leave the lid shut.
• Limit: 120 F / 48 C, the only service limit this sheet publishes, and there is no warranty term on it.

Because this station stands taller than its floor-standing twin on the same base, the layout on top deserves the same attention as the plumbing below. Fill point, vent, level device and any return line should be placed as one drawing rather than one at a time. Put the level reading where the operator actually stands: the level gauge selection guide sets out which technologies survive which chemistries, and it matters more on a tank whose top is above eye level. Mark the station in words and in the pictograms your inspectors expect; the tank label and signage guide reconciles the standards that a fire inspector and a workplace inspector will each hold you to.

Metering duty, gauges and the label on the tank

Stations of this size feed the small, relentless duties: hypochlorite, caustic, acid or polymer dosing at water and wastewater plants; a day tank beside a process line in food, paper or metal finishing; cooling water treatment on a chiller plant; detergent at a vehicle wash or a commercial laundry; a dosing point at a mine or a generating station. What all of them share is that the answer the process gets is only as good as the charge in the tank, and the charge is only as good as the sample somebody drew from it. The chemical sampling protocol article covers how a sample drawn from the wrong depth, at the wrong moment, into the wrong container produces a clean-looking wrong result. On a station standing at 67 inches the sampling point is also a working-at-height question, so decide where it is before the first delivery rather than after somebody has climbed on something.

Chemicals this resin is rated for, with the fitting and gasket to order

These are the chemicals listed for this tank at the concentrations shown. Each links to the full compatibility page; confirm your exact concentration and temperature there or in the chemical compatibility database before ordering.

• Acetic Acid (60%) - PP/PVC fittings, EPDM gaskets
• Aluminum Sulfate (50%) - PVC fittings, EPDM gaskets
• Calcium Chloride (40%) - PVC fittings, EPDM gaskets
• DEF (32.5%) - 316SS fittings, EPDM gaskets
• Ethylene Glycol (100%) - PVC fittings, EPDM gaskets
• Ferric Chloride (50%) - PVC fittings, EPDM gaskets
• Ferric Sulfate (60%) - PVC fittings, EPDM gaskets
• Ferrous Sulfate (20%) - PVC fittings, EPDM gaskets
• Hydrofluosilicic Acid (26%) - PP/PVC fittings, Viton gaskets
• Magnesium Chloride (30%) - PVC fittings, EPDM gaskets
• Polyaluminum Chloride - PVC fittings, EPDM gaskets
• Potassium Carbonate (50%) - PVC fittings, EPDM gaskets
• Potassium Hydroxide (saturated) - PVC fittings, EPDM gaskets
• Propylene Glycol - PP/316SS fittings, EPDM gaskets
• Sodium Carbonate (30%) - PVC fittings, EPDM gaskets
• Sodium Thiosulfate (40%) - PVC fittings, EPDM gaskets
• Urea Solution (50%) - PP/PVC fittings, EPDM gaskets

166 pounds crated 56 by 43 by 67 inches

This station is molded at Marked Tree, Arkansas. The sheet gives the freight class as LTL, a mode and not a numeric class, under NMFC 156600-01, which is a different sub-code from the one its floor-standing twin carries; both are printed as the sheet gives them. It crates at 56 by 43 by 67 inches at 166 pounds, so it is the taller crate of the pair: measure the door height, the aisle and any low header on the route into the plant room before the truck is booked. The freight cost estimator prices the lane to your ZIP and the listed price is before freight. Take the 166 pounds off with a forklift under the base of the stand, never by the lid and never with a sling around the tank body. Set it in its final position on the level floor or bund deck, then water-fill it once and hold it long enough to read the lid seal, the base of the stand and the floor underneath, and drain it dry before the chemical arrives. Walk round the underside of the tank with a torch the week after the first fill; the clear space beneath the stand is the reason you bought this version, and it is only useful if somebody looks. Save the pallet; a tank that ever has to move again is easier to move on it.