{"product_id":"viair-450c-air-compressor-kit-with-40-amp-relay-continuous-duty","title":"Viair 450C Air Compressor Kit with 40 Amp Relay - Continuous Duty","description":"\u003cp\u003eIn this review the Viair 450C Air Compressor Kit with the 93940 40 Amp relay is evaluated as a practical solution for users who need a reliable 12 volt source of compressed air on vehicles and equipment. The bottom line: this kit is best for operators who require a true \u003cstrong\u003e100 percent duty cycle\u003c\/strong\u003e compressor that can run continuously with the engine on, and who value a compact, easy to install package that includes a heavy-duty relay for safe electrical control.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eContinuous duty design:\u003c\/strong\u003e The 450C delivers a 100 percent duty cycle at 100 PSI and 72 degree ambient, so it can operate for extended periods without needing cool-down breaks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStrong free flow:\u003c\/strong\u003e It produces 1.66 CFM at 0 PSI and 0.94 CFM at 100 PSI, giving usable air output for inflating, actuating small air tools, and operating valves without a tank.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh working pressure:\u003c\/strong\u003e The compressor reaches up to 150 PSI max working pressure for applications that demand higher line pressure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded stainless braided leader hose:\u003c\/strong\u003e A 1\/4 NPT stainless steel braided leader hose with inline check valve streamlines hookup and prevents backflow into the unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRelay for safe electrical control:\u003c\/strong\u003e The 93940 40 amp relay with four 1\/4 in spade posts and mounting tabs handles up to 40 A and is supplied so each compressor can have proper relay control.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThis kit is aimed at farmers, contractors, and off-road vehicle owners who need a compact, durable compressor that can run while the engine is on and maintain pressure through extended use. It is suited for applications like inflating tires, operating small pneumatic systems on planters or trailers, and powering small air tools when a tank is not required.\u003c\/p\u003e\u003cp\u003eThose who need very high CFM for continuous heavy-duty pneumatic tools or who require an onboard air tank for long tool cycles should consider a larger compressor or add a separate tank, since this model is optimized for continuous but modest CFM output without a reservoir.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eReliable \u003cstrong\u003e100 percent duty cycle\u003c\/strong\u003e performance at rated conditions for extended runs.\u003c\/li\u003e\n\u003cli\u003eGood portability and easy installation with the included stainless braided leader hose and insulated wiring.\u003c\/li\u003e\n\u003cli\u003eThe 40 amp relay simplifies safe, proper electrical installation and protects the compressor wiring.\u003c\/li\u003e\n\u003cli\u003eHigh maximum working pressure of 150 PSI covers a range of tasks.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eNoise reports are mixed; some users find it noticeably loud when running without a tank.\u003c\/li\u003e\n\u003cli\u003eCFM is modest compared with larger shop compressors, so a separate tank may be needed for high-demand tool use.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e12 volt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax working pressure\u003c\/td\u003e\n\u003ctd\u003e150 PSI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFree flow\u003c\/td\u003e\n\u003ctd\u003e1.66 CFM @ 0 PSI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCFM at 100 PSI\u003c\/td\u003e\n\u003ctd\u003e0.94 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDuty cycle\u003c\/td\u003e\n\u003ctd\u003e100 percent at 100 PSI, 72 degree ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelay\u003c\/td\u003e\n\u003ctd\u003e93940 40 amp 12v relay with four 1\/4 in spade posts and mounting tabs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHose\u003c\/td\u003e\n\u003ctd\u003e1\/4 NPT stainless steel braided leader hose with inline check valve\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe Viair 450C kit with the 40 amp relay is a sensible choice for anyone who needs a compact, continuously capable 12 volt compressor that installs cleanly and runs reliably with the engine on. It offers good value for duties that require sustained pressure rather than high CFM bursts, and the included relay and braided hose make proper installation straightforward.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eCan the compressor run continuously?\u003c\/strong\u003e\u003cbr\u003eYes, the 450C is rated for a 100 percent duty cycle at 100 PSI and 72 degree ambient when the vehicle engine is running.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the relay necessary?\u003c\/strong\u003e\u003cbr\u003eYes, each compressor should have its own relay for proper electrical control; the kit includes the 93940 40 amp relay with four 1\/4 in spade posts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this unit power air tools without a tank?\u003c\/strong\u003e\u003cbr\u003eIt can power light pneumatic tasks and actuators, but for extended tool use a separate tank is recommended due to modest CFM at working pressure.\u003c\/p\u003e","brand":"VIAIR","offers":[{"title":"Default Title","offer_id":48746626711771,"sku":"B0B7J79R5Y","price":334.68,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/41dKif9WlbL._AC_SL1001.jpg?v=1778961286","url":"https:\/\/gearmusthave.com\/products\/viair-450c-air-compressor-kit-with-40-amp-relay-continuous-duty","provider":"GearMustHave","version":"1.0","type":"link"}