225 Gallon 30 Degree Plastic Vertical Cone Bottom Tank with Stand

The duty is a batch that has to leave the tank completely

A cone is bought for what happens at the end of the batch. A flat-bottomed tank holds a film of liquid and whatever settled out of it, and on a batch duty that residue is the next batch's contamination, so the buyer of this tank is somebody making up a liquid rather than storing one: a farm or spray contractor mixing a chemical batch and drawing it down to nothing before the next one, a greenhouse or nursery making up nutrient for injection, a water or wastewater works making up a polymer or a coagulant solution that must not be left standing, a food or beverage plant batching a cleaning or process solution, a plating shop making up a bath addition, a laboratory or pilot line where the whole batch is the sample. The delivery into it is a hose, a drum pump or a bag of dry product through the manway, never a tanker, and the discharge is the point of the tank: 30 degrees of cone keeps solids moving toward the centre instead of building a ring on a floor, and the stand holds the whole cone clear so the discharge has somewhere to go. The poly stand matters as much as the cone. It puts the outlet at working height, it is the same material as the tank so nothing corrodes where the two meet, and it fixes the footprint: a 48 inch circle, four feet, which is a pallet-sized area of floor in a mix room, a shed or a trailer bay. Overall height is 55 inches, a little over four and a half feet, so the manway is reachable from a step, a person can look into it and add product by hand, and the tank sits under almost any ceiling. What the stand also does is concentrate the load. The full weight does not bear on a wide floor; it goes into the stand's feet, so the surface under it has to be flat, level and hard enough for that, with the feet in full contact and nothing rocking. Bolt or block it so it cannot walk when a pump starts. Check the volume against the batch size and the batch frequency in the tank sizing calculator rather than buying to the nearest round number, and take the freeboard a warm or a foaming batch needs from the tank sizing guide, because a cone with an agitator in it needs more of it than a still tank does.

The 30 degree cone against the 15 degree cone

The sheet gives one sibling and the difference between them is the angle, which is the only specification that matters on a cone. This tank's 30 degree cone is the steeper of the pair: steeper walls move settling solids and viscous liquid toward the centre instead of letting them rest, which is what a slurry, a polymer make-up or a batch with a suspended powder needs. The 15 degree cone on the SII-5740101N45 is shallower, which buys volume and height for a narrower footprint, 275 gallons on a 42 inch base at 63 inches, and it suits a clean liquid that drains on its own and a site where floor is tighter than headroom. The sheet lists both at 140 pounds. Read the angle against your own liquid rather than against the gallons: a batch that settles wants the steep cone even at the smaller volume, and a batch that does not can take the shallower one and gain the extra gallons. The reasoning across cone angles, and which stand goes with which shell, is worked through in the cone angle selection guide and the cone bottom stand compatibility matrix.

Which wall for your chemical? Call 866-418-1777 with the name and the concentration, or send a quote request and we will pick the row.

Pump off the cone, and the service limit this sheet does publish

• The pump: on a cone the pump is fed by the apex rather than by a wall fitting, and the stand is what makes that work, because it leaves room under the cone for a valve, a short fall and a pump. Set the pump below the cone outlet, keep the run between them short and straight, and the batch drains to the pump instead of being sucked off a floor. That geometry also means the pump sees the last of the batch at the lowest head of the whole draw, so size it for that condition rather than for a full tank.
• Prime and protection: a cleanable strainer the operator can clear between batches without breaking the line, a check valve where the discharge lifts, and a low level cut-out if the pump is ever left running unattended. On a batch duty the more useful protection is procedural as well: the pump stops when the batch is out, and the tank gets a rinse while it is still wet, which is the single habit that keeps a cone clean.
• Outlet: the sheet's outlet field is empty, so this page states no size, material or style for it. Tell us the batch, the solids and the pump and we will confirm with Snyder what the current molding carries and what can be fitted, in writing, before you order anything against it. Whatever it is, put a full-bore valve at the apex rather than a restriction, because a cone that cannot dump quickly is a flat tank with extra steps.
• Access and the limit: an 18 inch threaded vented manway on top, lid size also 18 inches, 55 inches up, reachable from a step, which is how dry product goes in and how the inside gets inspected. Keep the vent clear. And note the published limit: this sheet gives a service limit of 100 F / 37 C, which is the lowest figure published on any sheet in this group, so a hot make-up, an exothermic mix or steam cleaning is a conversation before the order rather than after.

Everything hung off a cone should be supported by the stand or the floor, never by the cone itself: a valve, a pump or a hard pipe carried on the apex loads the one part of the tank that is doing the most work. Put the flexible connector in first, then the valve on its own support. Keep an agitator, if there is one, mounted on its own frame rather than on the manway collar. And if the tank is outdoors at all, remember what is not on this sheet: no warranty term is published, and the rating of 1.9 describes the weight the wall carries and nothing about how a given liquid or a given temperature treats the resin over years.

Batching, dosing and solids that settle

The work is batch work: chemical mixing and spray make-up on a farm or at a spray contractor, nutrient make-up and injection at a greenhouse or nursery, polymer and coagulant make-up at a water or wastewater plant, cleaning and sanitising solution batching at a food, dairy or beverage plant, bath additions at a plating or finishing shop, dye and process make-up in a textile shop, and pilot or laboratory batching where the whole tank is one run. In every one of those the liquid is the specification and the cone is the reason for buying, so check the compatibility data against the resin and against whatever fittings end up on the cone, and hold the published service limit of 100 F / 37 C in mind when the batch is made up warm. Solids, slurries and anything that separates are what the steep cone is for; a clean, thin liquid does not need it. The listed price is before freight, and where the batch has to move somewhere else after it is made, the freight cost estimator is for the tank rather than the batch.

Rated chemistries for this tank

The manufacturer lists these liquids for this resin at the concentrations noted, with the fitting and gasket material to specify. Check the concentration and temperature you actually run on the linked page or in the chemical compatibility database before ordering.

• sulfuric acid (98%, CPVC fittings, Viton gaskets)
• hydrochloric acid (37%, PVC, Viton)
• phosphoric acid (85%, PVC, Viton)
• hydrofluoric acid (48%, PP/PVC, Viton)
• hydrogen peroxide (50%, PVC, Viton)
• sodium hypochlorite (up to 16.5%, PVC, Viton)
• ferric chloride (50%, PVC, EPDM)
• ethylene glycol (100%, PVC, EPDM)
• peracetic acid (30%, 316SS, Aflas), and
• potassium hydroxide (saturated, PVC, EPDM), among others. This is where the 1.9 rating earns its keep: several of those - sulfuric acid, hydrochloric acid, fer
• acetic acid
• aluminum sulfate and
• calcium chloride are covered as well on plastic PP/PVC plumbing. Note that
• DEF and
• urea solution are a different plumbing case - the chart calls for 316 stainless fittings on those, not plastic. The mistake to avoid: matching the tank b

Merced at class 400, 140 pounds on a pallet

The SII-1560400N45 is molded at Merced, California and ships at class 400 as the sheet lists it, moving as ordinary LTL freight rather than as an oversize load, which is what keeps a small cone affordable to get to a site. The freight cost estimator prices the lane to your ZIP and the listed price is before freight. At 140 pounds for the tank it comes off the truck with a forklift or with hands, but check what arrives before signing: a cone and a stand are separate shapes on a pallet, and a stand with a bent foot will never sit level. Assemble it on the floor it is going to live on, with the feet in full contact and nothing packed under one of them to take up a gap. Then fill it with clean water to the manway, hold it, and read the cone, the apex, the stand feet and the floor around them before the first real batch; drain it and dry it afterwards. A cone tank earns its price in the last gallon of every batch, so prove that last gallon leaves it on day one, with water, while nothing expensive is at stake. Walk the base after the first hard rain; a pad that shifts shows it at the edge first.