{"product_id":"heavy-duty-shop-tandem-model-no-t20324hc3-s","title":"Heavy Duty Shop Tandem - Model No.: T20324HC3-S","description":"\u003ch2\u003eCast Air Heavy Duty Shop Tandem Air Compressor — T20324HC3-S\u003c\/h2\u003e\n\u003cp\u003eThe T20324HC3-S is the top configuration in the 20 HP Shop Tandem series: two 20 HP motors driving HC3 cast iron pumps at 570 RPM on a 240-gallon horizontal ASME tank. Combined output is 180 CFM at 0 PSI and 140 CFM at 175 PSI. At $11,610, this is a serious machine for serious shops. The HC3 pump at 570 RPM is the slowest, quietest, longest-lived pump option Cast Air makes for this horsepower range. Paired with the 240-gallon receiver, you get maximum pressure stability and maximum pump longevity in a single unit. If your shop runs a compressor hard all day, every day, and you cannot afford pump rebuilds every few years, this is the configuration that makes sense economically over a 10–15 year service life.\u003c\/p\u003e\n\n\u003ch3\u003eWhat Justifies $11,610?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e570 RPM HC3 pump:\u003c\/strong\u003e The HC3 runs 25% slower than the HC2. At sustained compressor duty, that RPM reduction translates directly to longer valve life, lower operating temperatures, reduced vibration, and extended intervals between major pump service. A pump rebuild on a heavily loaded compressor might come every 4,000 hours on an HC2 — the HC3 pushes that interval substantially longer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e240-gallon receiver:\u003c\/strong\u003e Double the storage of the 120-gallon configuration. At 140 CFM of pump output and 240 gallons of storage, this machine handles production-level demand spikes without pressure instability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual redundancy:\u003c\/strong\u003e Two independent pump systems mean one side can go down for service while the other keeps the shop running. A $11,610 machine that never stops the shop is worth more than an $8,000 machine that stops it once a year for a pump rebuild.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCast Iron Pump Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAll cast iron construction:\u003c\/strong\u003e Cylinders, heads, and crankcase on both pumps. The HC3 is the largest pump in the Cast Air industrial piston series.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e570 RPM (HC3 configuration):\u003c\/strong\u003e The slowest pump speed in the Shop Tandem lineup. Minimal heat generation, minimal vibration, maximum longevity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTapered roller bearings:\u003c\/strong\u003e Both ends of each crankshaft. Built for decades of sustained operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision steel connecting rods:\u003c\/strong\u003e Automotive-type rod insert bearings at the crank, needle bearings at the wrist pin.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisc and spring valves:\u003c\/strong\u003e Field-serviceable, easy to inspect and rebuild. At 570 RPM, valve wear rates are substantially lower than faster pumps under identical load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-ring pistons:\u003c\/strong\u003e Maximum efficiency, minimal oil carry-over.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCentrifugal unloader:\u003c\/strong\u003e Loadless start every cycle. With 40 HP total, eliminating hard-start stress is essential for motor and contactor longevity.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTank and Controls\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e240-gallon horizontal ASME tank:\u003c\/strong\u003e Powder-coated, channel base. At this horsepower level and pump output, the 240-gallon tank provides the buffer that keeps system pressure stable under any realistic shop demand pattern.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo magnetic motor starters — mounted and wired:\u003c\/strong\u003e Factory-installed on both pump sides. Ready to connect to 3-phase service.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eASME safety valves:\u003c\/strong\u003e Factory-set on both sides.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMetal belt guards:\u003c\/strong\u003e Fully enclosed on both pump assemblies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCopper discharge and unloader tubes:\u003c\/strong\u003e Copper throughout the hot side of both assemblies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1,725 RPM industrial motors:\u003c\/strong\u003e Full 15% service factor or higher on both 20 HP motors.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAvailable Factory-Mounted Options\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow Oil Control (#6304x2M):\u003c\/strong\u003e Automatic oil-level shutdown on both pumps. Non-negotiable for production environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHour Meter 230V (#HRM75x2M) or 460V (#HRM460x2M):\u003c\/strong\u003e Track runtime independently on each pump for scheduled maintenance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlternator Relay (#ALT230M or #ALT460M):\u003c\/strong\u003e Automatically alternates lead pump each cycle to equalize wear on both sides.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectronic Auto Drain (#SDV03M):\u003c\/strong\u003e Timed solenoid condensate drain. Critical on a 240-gallon tank in high-humidity environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual Control (#DC2x2M):\u003c\/strong\u003e Start\/stop and throttle control modes. Standard on HC3 configurations — confirm at order.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAftercooler (#BGAC1x2M, 70 CFM rated per unit):\u003c\/strong\u003e Belt-guard-mounted aftercooler on both pump sides. Highly recommended for compressed air quality in a production environment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAll Options Package (#AOC3D):\u003c\/strong\u003e All asterisk options at 10% off. Note: Cannot combine intake silencers and dual control on HC3 units.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat Is in the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eTwo cast iron two-stage HC3 pump and motor assemblies (20 HP each) on a single rigid frame\u003c\/li\u003e\n\u003cli\u003e240-gallon horizontal powder-coated ASME tank with channel base\u003c\/li\u003e\n\u003cli\u003eTwo magnetic motor starters, mounted and wired at the factory\u003c\/li\u003e\n\u003cli\u003eTwo ASME safety valves\u003c\/li\u003e\n\u003cli\u003eTwo metal belt guards (fully enclosed)\u003c\/li\u003e\n\u003cli\u003eCopper discharge and unloader tubes on both sides\u003c\/li\u003e\n\u003cli\u003ePressure switch for each pump\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eOptional accessories are factory-installed at time of order and are not included unless specified at purchase.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eAvailable Configurations — 20 HP Shop Tandem Lineup\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eT20312HC2-S:\u003c\/strong\u003e 2×20 HP, 758 RPM, 180 CFM \/ 140 CFM @ 175 PSI, 120-gal — $7,974\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eT20312HC3-S:\u003c\/strong\u003e 2×20 HP, 570 RPM, 180 CFM \/ 140 CFM @ 175 PSI, 120-gal — $10,285\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eT20324HC2-S:\u003c\/strong\u003e 2×20 HP, 758 RPM, 180 CFM \/ 140 CFM @ 175 PSI, 240-gal — $9,460\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eT20324HC3-S:\u003c\/strong\u003e 2×20 HP, 570 RPM, 180 CFM \/ 140 CFM @ 175 PSI, 240-gal — $11,610 (this unit)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhen Does a Shop Need This vs. Stepping Up or Down?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep down if duty cycle is lower:\u003c\/strong\u003e If your shop does not run the compressor all day, the T20324HC2-S at $9,460 delivers identical CFM and storage for $2,150 less. The HC3 premium is justified by longevity — but only if you actually run the machine hard enough to see the difference.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThis unit is right when:\u003c\/strong\u003e Your compressor runs 8–12 hours per day, you cannot tolerate the downtime of frequent pump service, and you want the longest service intervals available in the 20 HP piston tandem class. Production shops, large collision centers, fleet maintenance facilities, and manufacturing plants with sustained air demands are the right home for the T20324HC3-S.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep up to 25–30 HP tandem:\u003c\/strong\u003e If 140 CFM is not enough — very large shops or high-demand production operations — the T25324HC2-S or T30324HC3-S deliver up to 210 CFM at 175 PSI on the same general platform.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications — T20324HC3-S\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel Number:\u003c\/strong\u003e T20324HC3-S\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHorsepower:\u003c\/strong\u003e 2 × 20 HP (40 HP total)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhase:\u003c\/strong\u003e 3-phase\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePump RPM:\u003c\/strong\u003e 570 (HC3 configuration)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCFM @ 0 PSI:\u003c\/strong\u003e 180 (combined, both pumps)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCFM @ 175 PSI:\u003c\/strong\u003e 140 (combined, both pumps)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTank Capacity:\u003c\/strong\u003e 240 gallons, horizontal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTank Type:\u003c\/strong\u003e ASME-certified, powder-coated, channel base\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMotor Speed:\u003c\/strong\u003e 1,725 RPM, 15% service factor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePump Type:\u003c\/strong\u003e Two-stage, all cast iron, centrifugal unloader\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControls:\u003c\/strong\u003e Two magnetic motor starters, mounted and wired; Dual Control standard on HC3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDischarge Tubing:\u003c\/strong\u003e Copper\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBelt Guard:\u003c\/strong\u003e Metal, fully enclosed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrice:\u003c\/strong\u003e $11,609.90\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eNote: Exact LxWxH dimensions and shipping weight for this configuration are not individually published by Castair. Contact us for freight details before ordering.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eWhy Buy From Air Compressor Factory Direct?\u003c\/h3\u003e\n\u003cp\u003eWe have specialized in industrial air compressor sales since 2016. At the $11,000+ price point, you should be confident this is the right machine before you buy it. We will help you evaluate whether the HC3 premium is justified by your duty cycle, and whether 240 gallons of storage is actually what your demand pattern requires.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e to a commercial address with a loading dock or forklift\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree tech support at 866-217-0063\u003c\/strong\u003e — honest assessment before you spend this kind of money\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull Cast Air manufacturer warranty\u003c\/strong\u003e — handled directly through us\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHonest guidance:\u003c\/strong\u003e If you would be equally well served by the HC2 or a smaller tandem, we will tell you. We would rather you buy the right machine once.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCall 866-217-0063 for quick answers and help!\u003c\/strong\u003e\u003c\/p\u003e","brand":"Cast Air","offers":[{"title":"Default Title","offer_id":53342605803733,"sku":"T20324HC3-S","price":11609.9,"currency_code":"USD","in_stock":true}],"url":"https:\/\/aircompressorfactorydirect.com\/products\/heavy-duty-shop-tandem-model-no-t20324hc3-s","provider":"Air Compressor Factory Direct","version":"1.0","type":"link"}