{"title":"Vents \u0026 Lids","description":"\u003cp\u003e\u003cstrong\u003eCPP® IBC Vents \u0026amp; Lids\u003c\/strong\u003e covers 150 mm (6″) \u003cstrong\u003eS160X7 female buttress-thread\u003c\/strong\u003e IBC fill caps, vented lid assemblies, pressure and vacuum relief vents, threaded blanking arrangements and replacement vent seals for compatible IBC containers.\u003c\/p\u003e\n\n\u003cp\u003eCorrect IBC venting is important during both storage and discharge. As liquid leaves an IBC, replacement air must enter the container. If the available air-in flow is too low, negative pressure can develop and pull the bottle walls inward. This is especially important with many newer IBC bottles, which can use thinner wall sections and may deform quickly under vacuum.\u003c\/p\u003e\n\n\u003cp\u003ePositive pressure also needs careful control. IBCs may be leak-tested at low pressure, often around \u003cstrong\u003e2–3 psi\u003c\/strong\u003e, but this is \u003cstrong\u003enot a working-pressure rating\u003c\/strong\u003e. Standard IBC bottles can visibly bulge or move at relatively low internal pressure and should not be treated as pressure vessels.\u003c\/p\u003e\n\n\u003ch3\u003eCurrent venting options\u003c\/h3\u003e\n\u003cp\u003eThe current \u003cstrong\u003eHMVMN20MM027\u003c\/strong\u003e pressure and vacuum relief vent provides approximately \u003cstrong\u003e100 L\/min air-in flow\u003c\/strong\u003e and is intended for controlled or intermittent gravity discharge rather than rapid continuous emptying of a full 1,000 L IBC.\u003c\/p\u003e\n\n\u003cp\u003eFor greater venting capacity, the \u003cstrong\u003e150 mm (6″) twin-vent lid\u003c\/strong\u003e uses two automatic pressure and vacuum relief vents, with approximately \u003cstrong\u003e200 L\/min combined airflow\u003c\/strong\u003e. Even with the twin-vent arrangement, the liquid discharge rate must remain within the available venting capacity.\u003c\/p\u003e\n\n\u003cp\u003eIf the IBC walls begin to pull inward during discharge, \u003cstrong\u003estop the liquid flow and allow the container to recover before continuing\u003c\/strong\u003e. Do not assume that any vent can match the full unrestricted flow of an open IBC outlet valve.\u003c\/p\u003e\n\n\u003ch3\u003eNext-generation CPP® IBC vent\u003c\/h3\u003e\n\u003cp\u003eCPP® is currently developing a new high-flow pressure and vacuum relief vent for IBC applications. Testing is being carried out across a range of new and used IBC designs to measure \u003cstrong\u003eair-in flow, pressure-relief performance and container deformation\u003c\/strong\u003e under realistic operating conditions.\u003c\/p\u003e\n\n\u003cp\u003eEarly development results indicate a substantial increase in both \u003cstrong\u003evacuum-relief and pressure-relief capacity\u003c\/strong\u003e compared with our current venting products. Production release is targeted for \u003cstrong\u003ethe end of 2026\u003c\/strong\u003e, with final verified performance figures and comparative data to be published when testing is complete.\u003c\/p\u003e\n\n\u003cp\u003eAlways select the lid and vent configuration to suit the actual IBC connection, required discharge rate and the container manufacturer's operating limits.\u003c\/p\u003e","products":[{"product_id":"2-vent-thread-gasket-olefin-elastomer-white","title":"2″ Vent Thread Gasket - PP Olefin Elastomer - White - CPP®","description":"\u003cp\u003e\u003cstrong\u003e2″ Vent Thread Gasket - PP Olefin Elastomer\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePart No:\u003c\/strong\u003e HMVG20TPENA\u003c\/p\u003e\n\u003cp\u003eReplacement sealing gasket for compatible CPP® 2″ IBC vent and vent-thread assemblies.\u003c\/p\u003e\n\u003ch3\u003eSpecification\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNominal size: \u003cstrong\u003e2″ vent thread\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eMaterial: \u003cstrong\u003ePP-based olefin elastomer\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eColour: \u003cstrong\u003ewhite\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eFunction: \u003cstrong\u003ethread \/ face sealing gasket\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eUse as a replacement gasket where the original seal is worn, damaged or removed during maintenance. Confirm compatibility with the vent body, sealing face and liquid before use.\u003c\/p\u003e\n\u003cp\u003eNo pressure rating is assigned to the gasket itself; the operating limit is determined by the complete assembled system.\u003c\/p\u003e","brand":"CPP.PARTS","offers":[{"title":"Default Title","offer_id":49493821718876,"sku":"HMVG20TPENA","price":2.81,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0855\/4250\/2748\/files\/HMVG20TPENA.png?v=1733511589"},{"product_id":"150mm6-ibc-fill-cap-g-p-p-c-w-seal","title":"150 mm (6″) IBC Fill Cap - GF Polypropylene - PP Elastomer Seal - CPP®","description":"\u003cp\u003e\u003cstrong\u003e150 mm (6″) IBC Fill Cap - GF Polypropylene\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePart No:\u003c\/strong\u003e IBC150P027\u003c\/p\u003e\n\u003cp\u003eCPP® 150 mm (6″) IBC fill cap for closing compatible IBC top openings.\u003c\/p\u003e\n\u003ch3\u003eSpecification\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNominal size: \u003cstrong\u003e150 mm \/ 6″\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eIBC lid thread: \u003cstrong\u003eS160X7 female buttress thread\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eMaterial: \u003cstrong\u003eglass-filled polypropylene\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eSeal: \u003cstrong\u003ePP-based elastomer\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eConfiguration: \u003cstrong\u003eplain fill cap\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSuitable where a simple closed IBC fill cap is required without an integral vent or secondary threaded opening.\u003c\/p\u003e\n\u003cp\u003eAlways confirm the IBC lid thread and sealing arrangement before ordering, as top-fill connections can vary between IBC manufacturers and models.\u003c\/p\u003e","brand":"CPP.PARTS","offers":[{"title":"Default Title","offer_id":49493822636380,"sku":"IBC150P027","price":21.08,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0855\/4250\/2748\/files\/IBC150P027.png?v=1736856691"},{"product_id":"150mm-6-ibc-fill-cap-with-2-bsp-female-c-w-seal-blank-plug","title":"150 mm (6″) S160X7 IBC Fill Cap × 2″ BSPP Female - Blanking Plug - GF Polypropylene - CPP®","description":"\u003cp\u003e\u003cstrong\u003e150 mm (6″) S160X7 IBC Fill Cap × 2″ BSPP Female - Blanking Plug\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePart No:\u003c\/strong\u003e IBC150P20B027\u003c\/p\u003e\n\u003cp\u003eCPP® 150 mm (6″) IBC fill cap with an \u003cstrong\u003eS160X7 female buttress thread\u003c\/strong\u003e and a central \u003cstrong\u003e2″ BSPP female connection\u003c\/strong\u003e, supplied complete with a removable blanking plug.\u003c\/p\u003e\n\u003ch3\u003eSpecification\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eIBC lid size: \u003cstrong\u003e150 mm \/ 6″\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eIBC lid thread: \u003cstrong\u003eS160X7 female buttress thread\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eLid material: \u003cstrong\u003eglass-filled polypropylene\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eLid seal: \u003cstrong\u003ePP-based elastomer\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eCentre connection: \u003cstrong\u003e2″ BSPP female\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eCentre closure: \u003cstrong\u003eremovable blanking plug\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSuitable where a standard 6″ IBC lid is required with a reusable 2″ BSPP female top connection. The blanking plug can be removed when the centre connection is required.\u003c\/p\u003e\n\u003cp\u003eAlways confirm the IBC top thread and sealing arrangement before ordering, as lid connections can vary between manufacturers and models.\u003c\/p\u003e","brand":"CPP.PARTS","offers":[{"title":"Default Title","offer_id":49493822734684,"sku":"IBC150P20B027","price":29.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0855\/4250\/2748\/files\/IBC150P20B027.png?v=1736851248"},{"product_id":"150mm-6-ibc-fill-cap-2-fast-auto-vents-g2-x-11-5-g-p-p","title":"150 mm (6″) IBC Fill Cap with Twin Automatic Pressure \u0026 Vacuum Vents - GF Polypropylene - CPP®","description":"\u003cp\u003e\u003cstrong\u003e150 mm (6″) IBC Fill Cap with Twin Automatic Pressure \u0026amp; Vacuum Vents\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePart No:\u003c\/strong\u003e IBC150P20BDV027\u003c\/p\u003e\n\u003cp\u003eCPP® 150 mm (6″) IBC fill cap with \u003cstrong\u003etwo automatic pressure and vacuum relief vents\u003c\/strong\u003e and a removable centre blanking plug. The twin-vent arrangement provides greater air-in and air-out capacity than the single HMVMN20MM027 low-flow vent.\u003c\/p\u003e\n\u003ch3\u003eSpecification\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eIBC lid size: \u003cstrong\u003e150 mm \/ 6″\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eIBC lid thread: \u003cstrong\u003eS160X7 female buttress thread\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eLid material: \u003cstrong\u003eglass-filled polypropylene\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eSeal material: \u003cstrong\u003ePP-based elastomer\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eVent arrangement: \u003cstrong\u003e2 automatic pressure \u0026amp; vacuum relief vents\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eVacuum opening pressure: \u003cstrong\u003ejust under 1 psi\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003ePressure opening pressure: \u003cstrong\u003eapproximately 2 psi\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eCombined airflow: \u003cstrong\u003eapproximately 200 L\/min total across both vents\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eCentre connection: \u003cstrong\u003eG2 × 11.5\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eCentre closure: \u003cstrong\u003eremovable blanking plug\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHow the twin vents work\u003c\/h3\u003e\n\u003cp\u003eDuring gravity discharge, replacement air must enter the IBC as liquid leaves. The two vacuum-relief valves admit air to help reduce negative pressure and the risk of the IBC walls being pulled inward.\u003c\/p\u003e\n\u003cp\u003eIf internal pressure rises, the pressure-relief function opens to allow excess pressure to escape through the same vent system.\u003c\/p\u003e\n\u003ch3\u003eImportant flow guidance\u003c\/h3\u003e\n\u003cp\u003eThe two vents provide approximately \u003cstrong\u003e200 L\/min combined air-in or air-out flow\u003c\/strong\u003e. This is greater than the current single low-flow vent, but the liquid discharge rate must still remain within the available venting capacity.\u003c\/p\u003e\n\u003cp\u003eDo not assume the lid can support the full unrestricted flow of an open IBC outlet valve. If the IBC walls begin to draw inward during discharge, \u003cstrong\u003estop the liquid flow and allow the container to recover before continuing\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eIBC pressure \u0026amp; vacuum caution\u003c\/h3\u003e\n\u003cp\u003eMany newer IBC bottles use relatively thin wall sections and can deform quickly under negative pressure. Positive pressure must also be controlled carefully.\u003c\/p\u003e\n\u003cp\u003eIBC leak testing may be carried out at relatively low pressure, often around \u003cstrong\u003e2–3 psi\u003c\/strong\u003e, but this is \u003cstrong\u003enot a working-pressure rating\u003c\/strong\u003e. Standard IBC bottles can visibly bulge or move at low internal pressure and must not be treated as pressure vessels.\u003c\/p\u003e\n\u003ch3\u003eApplication\u003c\/h3\u003e\n\u003cp\u003eThis lid is intended for controlled venting of compatible IBCs during storage and gravity discharge. Always confirm the IBC top thread, required discharge rate and container manufacturer's operating limits before use.\u003c\/p\u003e\n\u003ch3\u003eNext-generation CPP® IBC vent development\u003c\/h3\u003e\n\u003cp\u003eCPP® is developing a new high-flow pressure and vacuum relief vent for IBC applications. Testing is being carried out across a range of new and used IBC designs to measure air-in flow, pressure-relief performance and container deformation. Initial results indicate substantially greater vacuum- and pressure-relief capacity than the current venting products. Production release is targeted for \u003cstrong\u003ethe end of 2026\u003c\/strong\u003e, with final verified performance data to be published when testing is complete.\u003c\/p\u003e","brand":"CPP.PARTS","offers":[{"title":"Default Title","offer_id":49493822996828,"sku":"IBC150P20BDV027","price":60.85,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0855\/4250\/2748\/files\/IBC150P20BDV027.png?v=1742895813"},{"product_id":"150mm-6-ibc-fill-cap-with-2-vent-g-p-p","title":"150 mm (6″) IBC Fill Cap with Fitted 2″ NPS\/BSP Pressure \u0026 Vacuum Vent - CPP®","description":"\u003cp\u003e\u003cstrong\u003e150 mm (6″) IBC Fill Cap with Fitted 2″ NPS\/BSP Pressure \u0026amp; Vacuum Vent\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePart No:\u003c\/strong\u003e IBC150P20BV027\u003c\/p\u003e\n\u003cp\u003eThis is a complete CPP® IBC lid assembly consisting of a \u003cstrong\u003e150 mm (6″) S160X7 female buttress-thread IBC fill cap\u003c\/strong\u003e with the \u003cstrong\u003eHMVMN20MM027 2″ NPS\/BSP pressure and vacuum relief vent already fitted\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eSpecification\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eIBC lid size: \u003cstrong\u003e150 mm \/ 6″\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eIBC lid thread: \u003cstrong\u003eS160X7 female buttress thread\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eLid material: \u003cstrong\u003eglass-filled polypropylene\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eLid seal: \u003cstrong\u003ePP-based elastomer\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eVent: \u003cstrong\u003eHMVMN20MM027 2″ NPS\/BSP male pressure \u0026amp; vacuum relief vent\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eApproximate vent air-in flow: \u003cstrong\u003earound 100 L\/min\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eConfiguration: \u003cstrong\u003ecomplete lid and vent assembly\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe vent is supplied \u003cstrong\u003efitted to the 6″ lid\u003c\/strong\u003e; this listing is for the complete assembly, not the lid and vent as separate loose items.\u003c\/p\u003e\n\u003ch3\u003eImportant flow limitation\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eThe fitted HMVMN20MM027 is a low-flow vent and is not intended to support rapid continuous emptying of a full 1,000 L IBC.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eBecause the vent admits approximately \u003cstrong\u003e100 L\/min of replacement air\u003c\/strong\u003e, the liquid discharge rate must not exceed the vent's air-in capacity. For faster gravity discharge, pause after approximately \u003cstrong\u003e100–200 litres\u003c\/strong\u003e to allow the IBC to recover before continuing.\u003c\/p\u003e\n\u003cp\u003eMany newer IBC bottles use thinner wall sections and can pull inward very quickly if negative pressure develops. If the container walls begin to deform during discharge, \u003cstrong\u003estop the flow immediately\u003c\/strong\u003e and allow the IBC to re-vent before continuing.\u003c\/p\u003e\n\u003ch3\u003eIBC pressure \u0026amp; vacuum caution\u003c\/h3\u003e\n\u003cp\u003eIBC leak testing may be carried out at relatively low positive pressure, often around \u003cstrong\u003e2–3 psi\u003c\/strong\u003e. This is a \u003cstrong\u003eleak-test condition, not a working-pressure rating\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eCPP® testing across different IBC designs has shown that standard IBC bottles can visibly bulge or move at relatively low positive pressure, while negative pressure can pull the side walls inward rapidly. The complete lid and vent assembly must therefore not be used to treat an IBC as a pressure vessel.\u003c\/p\u003e\n\u003ch3\u003eFitted pressure \u0026amp; vacuum relief vent\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVacuum relief\u003c\/strong\u003e - allows air into the IBC as liquid is discharged.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure relief\u003c\/strong\u003e - allows excess internal pressure to vent when pressure rises inside the container.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe vent has a \u003cstrong\u003eglass-filled polypropylene body\u003c\/strong\u003e, \u003cstrong\u003ePP-based elastomer seals\u003c\/strong\u003e and a \u003cstrong\u003e316 stainless-steel spring\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eNext-generation CPP® IBC vent in development\u003c\/h3\u003e\n\u003cp\u003eCPP® is developing a new high-flow pressure and vacuum relief vent, with testing across a range of new and used IBC designs. Initial development results indicate substantially greater vacuum- and pressure-relief capacity than the current HMVMN20MM027 low-flow vent. Production release is targeted for \u003cstrong\u003ethe end of 2026\u003c\/strong\u003e, with final verified performance data to be published when testing is complete.\u003c\/p\u003e\n\u003ch3\u003eUse guidance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSuitable for controlled gravity discharge and intermittent decanting.\u003c\/li\u003e\n\u003cli\u003eDo not assume the vent can match the full flow of an open IBC outlet valve.\u003c\/li\u003e\n\u003cli\u003eFor sustained high-rate discharge, use a venting arrangement with sufficient verified air-in flow for the required liquid discharge rate.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAlways confirm the IBC top thread and sealing arrangement before ordering, as lid connections can vary between IBC manufacturers and models.\u003c\/p\u003e\n\u003cp\u003eThe complete lid and vent assembly must not be used to pressurise an IBC beyond the container manufacturer's permitted operating limits.\u003c\/p\u003e","brand":"CPP.PARTS","offers":[{"title":"Default Title","offer_id":49493824307548,"sku":"IBC150P20BV027","price":46.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0855\/4250\/2748\/files\/ibc150p20bv027.png?v=1728233111"},{"product_id":"2-nps-bsp-male-ibc-vent-anti-vacuum-pressure","title":"2″ NPS\/BSP Male IBC Pressure \u0026 Vacuum Relief Vent - GF Polypropylene - CPP®","description":"\u003cp\u003e\u003cstrong\u003e2″ NPS\/BSP Male IBC Pressure \u0026amp; Vacuum Relief Vent\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePart No:\u003c\/strong\u003e HMVMN20MM027\u003c\/p\u003e\n\u003cp\u003eCPP® dual-function IBC vent designed to provide both \u003cstrong\u003evacuum relief during discharge\u003c\/strong\u003e and \u003cstrong\u003epressure relief when internal pressure rises\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eSpecification\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eConnection: \u003cstrong\u003e2″ male\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eThread: \u003cstrong\u003eBCS G2 × 11.5\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eCompatibility: \u003cstrong\u003edesigned for compatible 2″ BSP \/ NPS IBC vent connections\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eBody material: \u003cstrong\u003eglass-filled polypropylene\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eSeal material: \u003cstrong\u003ePP-based elastomer\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eSpring: \u003cstrong\u003e316 stainless steel\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eFunction: \u003cstrong\u003epressure relief and anti-vacuum \/ vacuum relief\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eApproximate vacuum air-in flow: \u003cstrong\u003earound 100 L\/min\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eImportant flow limitation\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eHMVMN20MM027 is a low-flow vent and is not intended to support rapid continuous emptying of a full 1,000 L IBC.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe vent allows approximately \u003cstrong\u003e100 L\/min of replacement air\u003c\/strong\u003e. When decanting, the liquid discharge rate must not exceed the vent's ability to admit air. For higher-rate gravity discharge, pause the flow after approximately \u003cstrong\u003e100–200 litres\u003c\/strong\u003e to allow the container to recover before continuing.\u003c\/p\u003e\n\u003cp\u003eThis is especially important with many newer IBC bottles, where thinner wall sections can pull inward very quickly if negative pressure develops.\u003c\/p\u003e\n\u003ch3\u003eIBC pressure \u0026amp; vacuum caution\u003c\/h3\u003e\n\u003cp\u003eIBC leak testing may be carried out at relatively low positive pressure, often around \u003cstrong\u003e2–3 psi\u003c\/strong\u003e. This is a \u003cstrong\u003eleak-test condition, not a working-pressure rating\u003c\/strong\u003e for the IBC.\u003c\/p\u003e\n\u003cp\u003eDuring CPP® development testing across different IBC designs, standard IBC bottles have shown visible bulging or panel movement at relatively low positive pressure, while negative pressure can pull the side walls inward very quickly. Wall thickness and stiffness vary between IBC manufacturers, models, ages and bottle designs.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThis vent must not be used to treat an IBC as a pressure vessel.\u003c\/strong\u003e Always follow the IBC manufacturer's permitted operating limits.\u003c\/p\u003e\n\u003ch3\u003eHow the vent works\u003c\/h3\u003e\n\u003cp\u003eDuring gravity discharge from an IBC, liquid leaving the container must be replaced by air. The vacuum-relief function allows air into the container to reduce the risk of the IBC panels drawing inward.\u003c\/p\u003e\n\u003cp\u003eIf pressure builds inside the container, the pressure-relief function allows excess internal pressure to vent through the same assembly.\u003c\/p\u003e\n\u003ch3\u003eUse guidance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSuitable for controlled gravity discharge and intermittent decanting.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eDo not assume the vent can match the full outlet flow of an open IBC valve.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eWatch the IBC walls during discharge. If they begin to pull inward, \u003cstrong\u003estop the flow immediately\u003c\/strong\u003e and allow air to enter before continuing.\u003c\/li\u003e\n\u003cli\u003eFor applications requiring sustained high-rate discharge, use a venting arrangement with sufficient verified air-in flow for the required liquid discharge rate.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eNext-generation CPP® IBC vent in development\u003c\/h3\u003e\n\u003cp\u003eCPP® is currently developing a new high-flow pressure and vacuum relief vent for IBC applications. Testing is being carried out across a range of new and used IBC designs to measure \u003cstrong\u003eair-in flow, pressure-relief performance and container deformation\u003c\/strong\u003e under realistic operating conditions.\u003c\/p\u003e\n\u003cp\u003eInitial development results indicate a substantial increase in both \u003cstrong\u003evacuum-relief and pressure-relief capacity\u003c\/strong\u003e compared with HMVMN20MM027. Production release is targeted for \u003cstrong\u003ethe end of 2026\u003c\/strong\u003e. Final verified performance data and any comparative claims will be published when testing is complete.\u003c\/p\u003e\n\u003ch3\u003eInstallation\u003c\/h3\u003e\n\u003cp\u003eScrew the vent into a compatible 2″ IBC top connection using the correct sealing arrangement. Do not use the vent as justification for pressurising an IBC beyond the container manufacturer's permitted operating limits.\u003c\/p\u003e\n\u003ch3\u003eMaterial and application guidance\u003c\/h3\u003e\n\u003cp\u003eCheck the \u003ca href=\"https:\/\/cpp.parts\/pages\/chemical-resistance\"\u003eCPP® chemical resistance guide\u003c\/a\u003e and \u003ca href=\"https:\/\/cpp.parts\/pages\/material-application-statement\"\u003eMaterial Application Statement\u003c\/a\u003e for suitability with your liquid and operating conditions.\u003c\/p\u003e","brand":"CPP.PARTS","offers":[{"title":"Default Title","offer_id":49587242434908,"sku":"HMVMN20MM027","price":28.16,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0855\/4250\/2748\/files\/hmvmn20bm027.png?v=1729603474"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0855\/4250\/2748\/collections\/cpp-ibc-vents-lids-collection.png?v=1788985334","url":"https:\/\/row.cpp.parts\/collections\/vents-lids.oembed","provider":"CPP.PARTS","version":"1.0","type":"link"}