{"product_id":"heavy-duty-shop-tandem-model-no-t20324hc2-s","title":"Heavy Duty Shop Tandem - Model No.: T20324HC2-S","description":"\u003ch2\u003eCast Air Heavy Duty Shop Tandem Air Compressor — T20324HC2-S\u003c\/h2\u003e\n\u003cp\u003eThe T20324HC2-S runs two 20 HP motors with HC2 cast iron pumps at 758 RPM on a 240-gallon horizontal ASME tank. Combined output is 180 CFM at 0 PSI and 140 CFM at 175 PSI. At $9,460, this is the 240-gallon version of the 20 HP HC2 tandem — same pump output as the T20312HC2-S, but with double the receiver storage. The 240-gallon tank is the right specification when your shop has intense peak demand: blast equipment, multiple spray guns firing simultaneously, tire inflation runs, or production machinery cycling on and off. The larger receiver absorbs those spikes and keeps system pressure stable so tools perform at rated capacity throughout the cycle.\u003c\/p\u003e\n\n\u003ch3\u003eWhy 240 Gallons on a 20 HP Tandem?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMore buffer for demand spikes:\u003c\/strong\u003e At 175 PSI, a 240-gallon ASME tank stores approximately twice the air energy of a 120-gallon tank. When multiple high-demand tools fire simultaneously, the 240-gallon receiver delays pressure drop while the pumps catch up.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFewer pump cycles:\u003c\/strong\u003e More storage means the pumps start and stop less frequently. Fewer cycles means less wear on pressure switches, motor contactors, and unloaders over time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSteady pressure for precision work:\u003c\/strong\u003e Spray work, torque-sensitive air tools, and pneumatic fixtures perform better when system pressure stays consistent. The 240-gallon tank provides that stability.\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 Both pump cylinders, heads, and crankcases are cast iron. Thermal stability for sustained output at 20 HP per side.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e758 RPM (HC2 configuration):\u003c\/strong\u003e Moderate slow-speed operation. Quieter and cooler than high-speed import equipment. Long intervals between valve and ring service.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTapered roller bearings:\u003c\/strong\u003e Both crankshaft ends on both pumps. Superior load handling for production-level duty.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision steel connecting rods:\u003c\/strong\u003e Automotive-type rod 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. The most common wear item in any piston compressor — Cast Air's design makes them easy to inspect and rebuild without specialized tooling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-ring pistons:\u003c\/strong\u003e Higher efficiency and less oil in the discharge stream compared to 2-ring designs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCentrifugal unloader:\u003c\/strong\u003e Loadless start every cycle. Critical at 40 HP total — the unloader prevents the high inrush current that degrades motor insulation and contactors over time.\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. The 240-gallon receiver paired with 140 CFM of pump output gives this machine excellent pressure recovery and stability under variable demand.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo magnetic motor starters — mounted and wired:\u003c\/strong\u003e Factory-installed on both pump sides. Connect to 3-phase service and operate.\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 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.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHour Meter 230V (#HRM75x2M) or 460V (#HRM460x2M):\u003c\/strong\u003e Independent runtime tracking on each pump.\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.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectronic Auto Drain (#SDV03M):\u003c\/strong\u003e Timed solenoid condensate drain. Even more important on the 240-gallon tank where condensate accumulates in a larger volume.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual Control (#DC2x2M):\u003c\/strong\u003e Start\/stop and throttle control modes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntake Noise Silencers (#SA100x4M):\u003c\/strong\u003e Reduces intake noise on both pumps.\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.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAll Options Package (#AOC2D):\u003c\/strong\u003e All asterisk options at 10% off combined price.\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 HC2 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 (this unit)\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\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 to 120-gallon (T20312HC2-S):\u003c\/strong\u003e If your demand is relatively steady and your tools do not all fire simultaneously, the 120-gallon tank at $7,974 saves $1,486. The pump output is identical — the only difference is storage volume.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThis unit is right when:\u003c\/strong\u003e Your shop has real demand spikes — moments when every tool is running at once — and you want the system to absorb those spikes without a pressure drop that affects tool performance or spray quality.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep up to HC3:\u003c\/strong\u003e If the compressor runs all day continuously, the T20324HC3-S at $11,610 offers the HC3 pump's 570 RPM operating speed and extended service life. The additional $2,150 over this unit is worth it for operations with 8–10+ hours per day of heavy compressor use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications — T20324HC2-S\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel Number:\u003c\/strong\u003e T20324HC2-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 758 (HC2 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\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 $9,460.25\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 20 HP tandem level, we can help you sort out whether HC2 or HC3, and whether 120 or 240-gallon, is the right call for your specific operation — before you spend $9,000–$11,000 on the wrong configuration.\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 — we will size this correctly for your actual demand\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 better served by a different configuration, we will tell you.\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":53342605705429,"sku":"T20324HC2-S","price":9460.25,"currency_code":"USD","in_stock":true}],"url":"https:\/\/aircompressorfactorydirect.com\/products\/heavy-duty-shop-tandem-model-no-t20324hc2-s","provider":"Air Compressor Factory Direct","version":"1.0","type":"link"}