{"product_id":"prevost-alto-4-air-pressure-regulator-tr-204-tr-205","title":"Prevost ALTO 4 Air Pressure Regulator — 3\/4\" \u0026 1\" FNPT, 7–145 PSI","description":"\u003cp\u003eThe \u003cstrong\u003ePrevost ALTO 4\u003c\/strong\u003e air pressure regulator holds a steady downstream pressure on high-flow 3\/4\" and 1\" lines. ALTO 4 is the large-body size in the Prevost ALTO air-preparation range, picking up where the smaller Prevost ATU regulators leave off at 1\/2\".\u003c\/p\u003e\n\n\u003cp\u003eA relieving diaphragm design vents excess downstream pressure when you dial the setting back, so the regulator responds immediately instead of locking in the higher pressure. The knob locks by pushing down, and a 1\/4\" gauge port lets you mount a gauge on either side. The modular ALTO 4 body stacks with the matching ALTO 4 filter and lubricator to build a 3\/4\" or 1\" FRL train.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePort sizes:\u003c\/strong\u003e 3\/4\" FNPT and 1\" FNPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlow rate:\u003c\/strong\u003e 177 CFM (3\/4\") \/ 212 CFM (1\") at 87 psi, ΔP = 14 psi\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustment range:\u003c\/strong\u003e 7 to 145 psi\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRegulator type:\u003c\/strong\u003e Relieving diaphragm, lockable knob\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGauge port:\u003c\/strong\u003e 1\/4\" (gauge sold separately)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody:\u003c\/strong\u003e Aluminum alloy\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e Prevost ALTO 4 air treatment module\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAvailable Variants \u0026amp; SKUs\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eSKU\u003c\/th\u003e\n\u003cth\u003ePort Size\u003c\/th\u003e\n\u003cth\u003eFlow Rate\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTR 204\u003c\/td\u003e\n\u003ctd\u003e3\/4\" FNPT\u003c\/td\u003e\n\u003ctd\u003e177 CFM at 87 psi (ΔP = 14 psi)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTR 205\u003c\/td\u003e\n\u003ctd\u003e1\" FNPT\u003c\/td\u003e\n\u003ctd\u003e212 CFM at 87 psi (ΔP = 14 psi)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003cp\u003eFlow ratings are taken from the Prevost 2026 US price list. Need a filter and regulator in one body? See the Prevost ALTO 4 filter-regulator.\u003c\/p\u003e","brand":"Prevost","offers":[{"title":"3\/4\" FNPT | 177 CFM","offer_id":54579651281171,"sku":"TR 204","price":173.76,"currency_code":"USD","in_stock":true},{"title":"1\" FNPT | 212 CFM","offer_id":54579651313939,"sku":"TR 205","price":180.47,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0825\/3141\/8387\/files\/Prevost-TR-204-ALTO-4_8abb45e9-fa1e-46d3-b76d-d39e1211f386.jpg?v=1787056368","url":"https:\/\/aircompressorstore.com\/products\/prevost-alto-4-air-pressure-regulator-tr-204-tr-205","provider":"Warthog Air Compressor Store","version":"1.0","type":"link"}