{"product_id":"smc-regulator-ar30k-0","title":"SMC AR30K-03BG-D Modular Regulator 3\/8\" with Reverse Flow — Round Gauge, Bracket Included","description":"\u003cp\u003e\u003cstrong\u003eSMC AR30K-03BG-D\u003c\/strong\u003e — AR-D series modular regulator, 3\/8\" port, with a built-in check valve that lets downstream air escape when the supply is cut (reverse flow function). The D series is the current generation, replacing the discontinued AR(K)-B.\u003c\/p\u003e\n\n\u003ch3\u003eSpecification — AR30K-03BG-D\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eAR20(K)-D to AR60(K)-D (modular regulator, reverse flow)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody size\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePort size\u003c\/td\u003e\n\u003ctd\u003e3\/8\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eReverse flow (built-in check valve)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGauge\u003c\/td\u003e\n\u003ctd\u003eRound pressure gauge (G), bracket (B)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFluid\u003c\/td\u003e\n\u003ctd\u003eAir\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct weight\u003c\/td\u003e\n\u003ctd\u003e270 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch3\u003eFeatures of the D series\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eReshaped handle — easier to grip when releasing the lock\u003c\/li\u003e\n\u003cli\u003eChoice of gauge: square embedded gauge, round gauge, or digital pressure switch\u003c\/li\u003e\n\u003cli\u003ePanel mount compatible with the earlier AR(K)-B series; brackets and set nuts are common to both generations\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat the reverse flow function does\u003c\/h3\u003e\n\u003cp\u003eA standard regulator holds pressure downstream even after the supply is shut off. The K version carries a check valve that lets that trapped air escape back through the regulator, so the downstream side drops to zero as soon as the supply is cut. It matters wherever a cylinder or clamp must not stay pressurised after shutdown.\u003c\/p\u003e\n\n\u003ch3\u003eReplacing an AR(K)-B unit\u003c\/h3\u003e\n\u003cp\u003eThe D series is the direct successor to the AR(K)-B, which SMC discontinued in March 2025. Panel mounting, brackets and set nuts carry over, so an existing installation usually takes the new unit without rework. Tell us the old code and we will confirm the matching D specification.\u003c\/p\u003e\n\n\u003ch3\u003eOrdering\u003c\/h3\u003e\n\u003cp\u003eOrder by the full code \u003cstrong\u003eAR30K-03BG-D\u003c\/strong\u003e. The K marks the reverse flow function, 03 the port size, and BG the bracket and gauge options — one character changes the part. The 20 and 40 body sizes are available in the same configuration.\u003c\/p\u003e\n\n\u003ch3\u003eSupply from Korea\u003c\/h3\u003e\n\u003cp\u003eGenuine SMC, stocked and shipped from Gyeonggi-do, Korea, with export packing and commercial documents prepared as standard.\u003c\/p\u003e","brand":"SMC","offers":[{"title":"Default Title","offer_id":50519473127643,"sku":"REGULATOR AR30K-0","price":36.06,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1052\/8660\/files\/001_19a0f1fb-6f7e-4fd6-90da-4d591ee46d8f.png?v=1790422272","url":"https:\/\/wowtoolz.com\/products\/smc-regulator-ar30k-0","provider":"WowToolz","version":"1.0","type":"link"}