{"product_id":"qlh31-pneumatic-precision-glue-dispensing-valve-anti-drip-silicone-uv","title":"QLH31 Pneumatic Precision Glue Dispensing Valve | Anti-Drip","description":"\n\u003ch2\u003eQLH31 Pneumatic Precision Glue Dispensing Valve\u003c\/h2\u003e\n\u003cp\u003eMeet the \u003cstrong\u003eQLH31 Pneumatic Precision Glue Dispensing Valve\u003c\/strong\u003e — an industrial-grade dispensing solution engineered for clean, accurate, and consistent adhesive application. Whether you're working with high-viscosity silicones, UV-cure adhesives, or other specialty compounds, this backsuction valve delivers a drip-free performance every time, keeping your workstation tidy and your output precise.\u003c\/p\u003e\n\n\u003cp\u003eDesigned for professionals and production line operators who demand reliability, the QLH31 features a built-in \u003cstrong\u003ebacksuction (suck-back) mechanism\u003c\/strong\u003e that instantly retracts adhesive the moment dispensing stops — eliminating unwanted drips, strings, and waste. The pneumatic actuation ensures fast, repeatable open\/close cycles, making it ideal for high-speed automated or semi-automated dispensing applications.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAnti-Drip Backsuction Design:\u003c\/strong\u003e Precision suck-back action prevents adhesive from dripping between shots, ensuring a clean, professional finish on every application.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Viscosity Compatible:\u003c\/strong\u003e Engineered to handle a wide range of adhesives including high-viscosity silicones, UV glues, epoxies, and other thick-bodied compounds.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePneumatic Actuation:\u003c\/strong\u003e Air-driven operation for fast, responsive, and highly repeatable dispensing cycles — no electricity required at the valve head.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecision Dispensing:\u003c\/strong\u003e Delivers consistent dot sizes and bead patterns with minimal variation, reducing material waste and improving product quality.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable Construction:\u003c\/strong\u003e Built with robust materials to withstand continuous industrial use and resist chemical exposure from common adhesives and sealants.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVersatile Application:\u003c\/strong\u003e Suitable for electronics assembly, PCB potting, optical bonding, gasket sealing, and general manufacturing processes.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEasy to Integrate:\u003c\/strong\u003e Standard pneumatic fittings allow straightforward integration into existing dispensing systems and robotic platforms.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e QLH31\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eActuation Type:\u003c\/strong\u003e Pneumatic (air-powered)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatible Adhesives:\u003c\/strong\u003e High-viscosity silicone, UV glue, epoxy, and similar compounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAnti-Drip Mechanism:\u003c\/strong\u003e Built-in backsuction (suck-back)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eElectrified:\u003c\/strong\u003e No (pneumatic only)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Concern Chemicals:\u003c\/strong\u003e None\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMade in:\u003c\/strong\u003e Mainland China\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWho Is This For?\u003c\/h3\u003e\n\u003cp\u003eThe QLH31 is ideal for electronics manufacturers, PCB assembly technicians, optical component producers, automotive sealant applicators, and any professional requiring a reliable, mess-free adhesive dispensing valve for high-viscosity materials.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/0-25mm-1000-turn-precision-copper-inductor-coil-diy-electronics\"\u003e0.25mm 1000-Turn Precision Copper Inductor Coil for DIY Circuits\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-channel-relay-module-dc-3-3v-24v-optocoupler-arduino\"\u003e1-Channel Relay Module DC 3.3V–24V Optocoupler for Arduino\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-channel-scr-solid-state-relay-switch-module-dc3-24v-40a-optocoupler\"\u003e1-Channel SCR Solid State Relay Module DC3-24V 40A Optocoupler\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor workplace safety guidelines related to adhesive and chemical dispensing equipment, refer to the OSHA Adhesives \u0026amp; Sealants Safety Resource. Additional manufacturing and measurement standards for dispensing equipment can be found at \u003ca href=\"https:\/\/www.nist.gov\/manufacturing\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eNIST Manufacturing Resources\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What types of adhesives is the QLH31 glue dispensing valve compatible with?\u003c\/h4\u003e\n\u003cp\u003eA: The QLH31 pneumatic precision glue valve is designed to handle high-viscosity adhesives including silicone sealants, UV-cure glues, epoxies, and other thick-bodied compounds commonly used in electronics assembly, optical bonding, and industrial sealing applications.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How does the backsuction (anti-drip) feature work?\u003c\/h4\u003e\n\u003cp\u003eA: The QLH31 features a built-in pneumatic backsuction mechanism that creates a slight negative pressure at the nozzle tip the instant dispensing stops. This retracts the adhesive back into the valve, preventing drips, strings, or oozing between dispensing cycles — resulting in a clean, precise application every time.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Does the QLH31 require electricity to operate?\u003c\/h4\u003e\n\u003cp\u003eA: No. The QLH31 valve is pneumatically actuated, meaning it operates entirely on compressed air. There is no electrical connection required at the valve head, making it safe and easy to integrate into air-driven dispensing systems and automated platforms.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can this valve be used with UV glue dispensing systems?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The QLH31 is fully compatible with UV-cure adhesives. Its precision dispensing and anti-drip design make it particularly well-suited for UV bonding applications where controlled dot placement and minimal adhesive waste are critical.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What types of adhesives is the QLH31 glue dispensing valve compatible with?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The QLH31 pneumatic precision glue valve is designed to handle high-viscosity adhesives including silicone sealants, UV-cure glues, epoxies, and other thick-bodied compounds commonly used in electronics assembly, optical bonding, and industrial sealing applications.\"}}, {\"@type\": \"Question\", \"name\": \"How does the backsuction (anti-drip) feature work?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The QLH31 features a built-in pneumatic backsuction mechanism that creates a slight negative pressure at the nozzle tip the instant dispensing stops. 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Its precision dispensing and anti-drip design make it particularly well-suited for UV bonding applications where controlled dot placement and minimal adhesive waste are critical.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/oasis-select.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Electronics \u0026 Tech\", \"item\": \"https:\/\/oasis-select.com\/collections\/electronics-tech\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"QLH31 Pneumatic Precision Glue Dispensing Valve | Anti-Drip\", \"item\": \"https:\/\/oasis-select.com\/products\/qlh31-pneumatic-precision-glue-dispensing-valve-anti-drip-silicone-uv\"}]}\u003c\/script\u003e","brand":"Oasis Select","offers":[{"title":"B","offer_id":47745320878185,"sku":"14:350686#B","price":105.15,"currency_code":"USD","in_stock":true},{"title":"A","offer_id":47745320910953,"sku":"14:350850#A","price":105.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/7931\/3257\/files\/S5de84ed768654908af71dbcb88037adbu.webp?v=1783031670","url":"https:\/\/oasis-select.com\/products\/qlh31-pneumatic-precision-glue-dispensing-valve-anti-drip-silicone-uv","provider":"Oasis Select","version":"1.0","type":"link"}