{"id":3563,"date":"2016-11-18T19:13:40","date_gmt":"2016-11-18T19:13:40","guid":{"rendered":"http:\/\/www.pdblowers.com\/product\/threaded-silencer-rissd4\/"},"modified":"2023-12-22T17:37:05","modified_gmt":"2023-12-22T22:37:05","slug":"threaded-silencer-rissd4","status":"publish","type":"product","link":"https:\/\/www.pdblowers.com\/product\/threaded-silencer-rissd4\/","title":{"rendered":"RIS\/SD-4 Threaded Silencer"},"content":{"rendered":"<p>The RIS\/SD 4&#8243; <strong>threaded silencer<\/strong> features all welded construction and has 4&#8243; MPT connections at both ends. The silencer can be used on either the inlet or discharge side of the blower and should be located as close as possible to the blower connections.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-8631\" src=\"\/wp-content\/uploads\/2017\/09\/universal-ris-sd-attenuation-curve-300x210.png\" alt=\"Universal Blower Silencers - RIS SD Typical Attenuation Curve\" width=\"300\" height=\"210\" srcset=\"https:\/\/www.pdblowers.com\/wp-content\/uploads\/2017\/09\/universal-ris-sd-attenuation-curve-300x210.png 300w, https:\/\/www.pdblowers.com\/wp-content\/uploads\/2017\/09\/universal-ris-sd-attenuation-curve-100x70.png 100w, https:\/\/www.pdblowers.com\/wp-content\/uploads\/2017\/09\/universal-ris-sd-attenuation-curve.png 447w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\n<p>Inlet Flow Rating: 480 CFM<br \/>\nDischarge Flow Rating: 735 cfm at 15 psig (flow based on inlet flow)<br \/>\nMaximum Temperature: 325 \u00b0F<br \/>\nHousing Diameter (ID): 10&#8243;<br \/>\nOverall Length: 45&#8243;<br \/>\nWeight: 43 lbs (19.5 kg)<br \/>\nThis <strong>threaded silencer<\/strong> can be shipped via UPS.<\/p>\n<p><strong>Paint and Coating Options<\/strong><br \/>\nSilencers are shipped with the manufacturer&#8217;s standard blue primer coat. \u00a0For a durable, long lasting finish, pdblowers can apply special coatings with additional cost and lead time. \u00a0Our most common option includes a primer coat of Sherwin-Williams KEM KROMIK, a rust inhibiting, corrosion resistant phenolic alkyd resin primer, followed by a finish coat of Sherwin-Williams SHER-KEM\u00ae high gloss metal finishing enamel. \u00a0<a href=\"\/contact\/\">Contact us to discuss special coatings.<\/a><\/p>\n<p><strong>Air Tightness<\/strong><br \/>\nStandard industrial silencers are generally not individually leak tested and occasionally very small pin-holes may appear in welds. Because of the small size of these pin-holes, their effect on typical pressure or vacuum conditions is insignificant. If 100 percent air tightness is essential for gas service or other special applications, with additional cost and lead time the manufacturer will perform a 7 PSIG leak test. <a href=\"\/contact\/\">Contact us<\/a> if you need this service with your order.<\/p>\n<p>&nbsp;<\/p>\n\n","protected":false},"excerpt":{"rendered":"<p>Heavy-duty all welded unit<br \/>\nChamber-absorptive type<br \/>\nPitch line speeds above 3300 FPM<br \/>\n[message_string post=\"Roots_delay\"]<\/p>\n","protected":false},"featured_media":8204,"template":"","meta":{"_acf_changed":false},"product_cat":[67],"product_tag":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Threaded Blower Silencer 4&quot; RIS\/SD | pdblowers, Inc.<\/title>\n<meta name=\"description\" content=\"4&quot; Blower Silencer, Universal RIS\/SD model - typically kept in stock and ready to ship. 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