{"product_id":"roland-ink-damper-for-ej640","title":"Roland Ink Damper for EJ640","description":"\u003cdiv style=\"font-family: Arial, Helvetica, sans-serif; font-size: 16px; line-height: 1.6; color: #111;\"\u003e\n\u003c!-- Highlights --\u003e\n\u003cdiv style=\"border: 1px solid #eee; border-radius: 10px; padding: 14px; margin-bottom: 14px;\"\u003e\n\u003cp style=\"font-size: 17px; font-weight: bold; margin: 0 0 8px;\"\u003eRoland Ink Damper — EJ-640\u003c\/p\u003e\n\u003cul style=\"margin: 0; padding-left: 18px;\"\u003e\n\u003cli\u003eDX7-type ink damper for stable, bubble-free ink supply\u003c\/li\u003e\n\u003cli\u003eDual fine mesh filters reduce clogging and banding\u003c\/li\u003e\n\u003cli\u003eCompatible with eco-solvent and solvent inks\u003c\/li\u003e\n\u003cli\u003eDirect-fit replacement; easy to install\u003c\/li\u003e\n\u003cli\u003eImproves nozzle stability and print consistency\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- Description --\u003e\n\u003cp style=\"margin: 0 0 10px;\"\u003eThe \u003cstrong\u003eRoland EJ-640 Ink Damper\u003c\/strong\u003e stabilizes ink flow between the ink line and the printhead. Replacing old dampers restores consistent pressure, prevents micro-bubbles, and ensures smooth, high-quality printing.\u003c\/p\u003e\n\u003c!-- Compatibility --\u003e\n\u003cdiv style=\"border-left: 4px solid #111; padding-left: 10px; margin: 12px 0;\"\u003e\n\u003cp style=\"font-weight: bold; margin: 0 0 6px;\"\u003ePrinter Compatibility\u003c\/p\u003e\n\u003cul style=\"margin: 0; padding-left: 18px;\"\u003e\n\u003cli\u003eRoland EJ-640\u003c\/li\u003e\n\u003cli\u003eAlso fits: XF-640, XT-640, RA-640, RE-640, RF-640\u003c\/li\u003e\n\u003cli\u003eVS-Series: VS-300 \/ VS-420 \/ VS-540 \/ VS-640 \/ VS-i models\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- Specs --\u003e\n\u003cdiv style=\"margin: 12px 0; overflow-x: auto;\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 15px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #eee; padding: 8px; width: 38%; font-weight: bold;\"\u003eType\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #eee; padding: 8px;\"\u003eDX7 Ink Damper (double-chamber)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #eee; padding: 8px; font-weight: bold;\"\u003eFilter\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #eee; padding: 8px;\"\u003eDual fine mesh, integrated gasket\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #eee; padding: 8px; font-weight: bold;\"\u003eInk\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #eee; padding: 8px;\"\u003eEco-solvent \/ Solvent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #eee; padding: 8px; font-weight: bold;\"\u003eCondition\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #eee; padding: 8px;\"\u003eNew\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #eee; padding: 8px; font-weight: bold;\"\u003ePacking\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #eee; padding: 8px;\"\u003e1 pc (4 pcs set available)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Tips --\u003e\n\u003cp style=\"font-weight: bold; margin: 10px 0 6px;\"\u003eInstallation Tips\u003c\/p\u003e\n\u003cul style=\"margin: 0 0 10px; padding-left: 18px;\"\u003e\n\u003cli\u003eCheck ink tubes and negative pressure system when replacing dampers.\u003c\/li\u003e\n\u003cli\u003ePrime the system to remove air bubbles before printing.\u003c\/li\u003e\n\u003cli\u003eReplace old O-rings and clamps together for better performance.\u003c\/li\u003e\n\u003cli\u003eRun a nozzle test after installation to confirm stable ink flow.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003chr\u003e\n\u003ch3\u003eUse Position \u0026amp; Function\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eThe damper is normally installed between the ink supply path and the printhead to stabilize pressure and reduce bubbles.\u003c\/li\u003e \u003cli\u003eIt helps support smoother ink delivery and can also assist with filtering fine particles before ink reaches the printhead.\u003c\/li\u003e \u003cli\u003eDamper performance has a direct effect on ink stability, especially on multi-channel or high-speed printers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompatibility Reference\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eReferenced machine models: EJ640, EJ-640, XF-640, XT-640, RA-640, RE-640, RF-640, VS-300, VS-420, VS-540, VS-640.\u003c\/li\u003e \u003cli\u003eReferenced printheads: DX7.\u003c\/li\u003e \u003cli\u003eSuitable for solvent use when the connector type, orientation, and sealing method match the reference damper.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhen Buyers Replace This Part\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eReplace when ink flow becomes unstable, bubbles increase, colors drop out, or the damper body becomes contaminated or deformed.\u003c\/li\u003e \u003cli\u003eCompare the manufacturer part number, connection layout, and mounting direction before ordering.\u003c\/li\u003e \u003cli\u003eFor best maintenance results, buyers often inspect cap tops, tubing, and ink filters at the same time.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eCommon Replacement Scenarios\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eReplace when colors intermittently drop out, bubbles appear repeatedly, or the printhead side shows unstable ink feeding.\u003c\/li\u003e \u003cli\u003eInspect this part when the damper body becomes stained, swollen, cracked, or no longer seals reliably.\u003c\/li\u003e \u003cli\u003eOn printers with multiple channels, one weak damper can affect daily color consistency even if the printhead is still usable.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFitment Checklist\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eReferenced machine models: EJ640, EJ-640, XF-640, XT-640, RA-640, RE-640, RF-640, VS-300, VS-420, VS-540, VS-640.\u003c\/li\u003e \u003cli\u003eReferenced printheads: DX7.\u003c\/li\u003e \u003cli\u003eCheck joint style, filter structure, connector direction, sealing method, and manufacturer reference before final purchase.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eService Pairing Suggestions\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eMany buyers inspect cap tops, ink tubes, pumps, and filters at the same time when damper problems appear.\u003c\/li\u003e \u003cli\u003eUse this damper only when the solvent ink path, connector style, and physical size match the reference assembly.\u003c\/li\u003e \u003cli\u003eProfessional installation is recommended when the printer uses a sealed manifold or tightly packed multi-channel head carriage.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"UV INK PRO","offers":[{"title":"Default Title","offer_id":44273964515414,"sku":null,"price":21.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0691\/3782\/5878\/files\/Roland-Ink-Damper-for-EJ640-1.webp?v=1775015317","url":"https:\/\/www.uvinkpro.com\/products\/roland-ink-damper-for-ej640","provider":"UV INK PRO","version":"1.0","type":"link"}