{"product_id":"dji-agras-t40-oem-leak-proof-valve-core-set-10-sets","title":"DJI Agras T40 OEM Leak-Proof Valve Core Set (10 Sets)","description":"\u003cp\u003eThe DJI Agras T40 OEM Leak-Proof Valve Core Set (10 Sets) is a pack of ten matched pairs for the spray system's leak-proof valves: ten black moulded valve cores, each with a cross-shaped stem and a round flange collar, and ten steel coil springs that push those cores closed. Together, a core and its spring are the moving half of a leak-proof valve, the part that lets liquid through while the pump is running and shuts the line when it stops, so the aircraft does not drip on the turn, on the trailer or over the wrong ground. It belongs to the spraying system, not to the airframe, power or flight-control systems, and it is identified for the DJI Agras T40 and T20P. Operators usually find it while searching for a T40 leak-proof valve core, a T40 anti-drip spring, a T20P valve core and spring set, or a fix for a nozzle that keeps dripping after the spray switch is off. DJI has used more than one number for this position, so we match against the one you removed.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e🇺🇸 U.S.A. FIRST\u003c\/h2\u003e\n\u003cp\u003eAres Acres LLC is a U.S.-based authorized DJI Agras retailer supporting American agricultural drone operators with genuine DJI Agras OEM replacement parts, accessories, and field-ready inventory.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFREE \u0026amp; FAST Shipping is included for all U.S. customers.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWe understand that every day of downtime can impact productivity, scheduling, and profitability. That's why we focus on providing fast fulfillment, responsive customer support, and reliable access to the parts operators need most.\u003c\/p\u003e\n\u003cp\u003eAres Acres also ships agricultural drone parts to Canada, with free shipping included on Canadian orders. Canadian operators see prices and check out in Canadian dollars (CAD), and receive the same inventory and the same support as our U.S. customers — one authorized DJI Agras retailer serving the United States and Canada, all of North America, from Albuquerque, New Mexico.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e✅ DJI Agras T40 \/ DJI Agras T20P Compatibility Guarantee\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e🇺🇸 USA Compatibility Guarantee\u003c\/li\u003e\n\u003cli\u003e👍🏻 Satisfaction Guarantee\u003c\/li\u003e\n\u003cli\u003e💵 Money Back Guarantee\u003c\/li\u003e\n\u003cli\u003e📦 Same Day Shipping \u0026amp; Tracking\u003c\/li\u003e\n\u003cli\u003eIdentified for the DJI Agras T40 and T20P, spray system leak-proof valve position\u003c\/li\u003e\n\u003cli\u003eMatched by core outline, stem shape, flange collar and spring form against the core and spring you removed\u003c\/li\u003e\n\u003cli\u003eGenuine DJI OEM spray system components, brand new, supplied as ten core-and-spring sets\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eValve cores, valve sealing rings and filters on the Agras spray line are separate parts that are easy to confuse once they are out of the aircraft. If you want the match confirmed, photograph the core and spring you removed side by side on a plain surface, with the stem end of the core facing the camera, and send it to us — we will match it for you.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e📦 Package Includes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e10 × Leak-Proof Valve Core — black moulded core with a cross-shaped stem and a round flange collar\u003c\/li\u003e\n\u003cli\u003e10 × Leak-Proof Spring — steel coil compression spring, one for each core\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eThis is ten complete core-and-spring sets.\u003c\/strong\u003e Each set is one core and one spring, the two moving parts of one leak-proof valve. The product images show a sample of cores and springs laid out together; the pack itself holds ten of each.\u003c\/p\u003e\n\u003cp\u003eNot included: the leak-proof valve bodies or housings, any sealing rings or O-rings, nozzles or sprinkler heads, spray hoses and hose fittings, filters, the spray pump, solenoid valves, flow meters, and any tools. If a sealing ring in your valve is flattened, cut or hardened, replace it separately; a new core cannot seal against a damaged ring.\u003c\/p\u003e\n\u003cp\u003eNothing is included because it appears near the valve on the aircraft. If a ring, clip or fitting is missing from the valve you opened, tell us which one and we will help you identify it.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e🔧 Component Overview\u003c\/h2\u003e\n\u003cp\u003eA leak-proof valve has a fixed half and a moving half. The fixed half is the valve body plumbed into the spray line. The moving half is what this set replaces: a valve core that slides in the body, and a coil spring behind it that holds the core shut against its seat whenever the line is not under spray pressure.\u003c\/p\u003e\n\u003cp\u003eThe two parts are simple to describe from the product images:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe valve core\u003c\/strong\u003e — a black moulded part with a cross-shaped stem, four vanes in plan, and a round flange collar around its middle. The stem keeps the core centred in its bore while leaving open channels between the vanes for liquid to pass when the valve is open. The flange and the face around it are what close the valve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe spring\u003c\/strong\u003e — a straight, open-wound steel coil spring. It sits behind the core and pushes it toward the closed position. The force of that push is what decides how much line pressure it takes to open the valve, and how firmly the valve shuts when the pump stops.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhen the pump runs, line pressure overcomes the spring, the core moves off its seat and liquid flows. When the pump stops, pressure falls, the spring wins, and the core closes the line. That is the whole job, and it happens at the start and the end of every spray pass.\u003c\/p\u003e\n\u003cp\u003eOver a working season the core and spring see:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThousands of open-and-close cycles, one at every pass start and stop\u003c\/li\u003e\n\u003cli\u003eConstant contact with spray chemicals, adjuvants and rinse water\u003c\/li\u003e\n\u003cli\u003eGrit, crop residue and undissolved product that reach the valve when a filter is skipped or damaged\u003c\/li\u003e\n\u003cli\u003eResidue that dries on the core and in the bore when the system is parked without a flush\u003c\/li\u003e\n\u003cli\u003eHeat on the trailer and in the sun between flights\u003c\/li\u003e\n\u003cli\u003eHandling during cleaning, when cores and springs come out and go back in\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSets in this position usually come out for one of three reasons: a valve that drips after the spray switch is off, a core whose sealing face or flange is scored, swollen or chipped, or a spring that has lost length and no longer closes the valve firmly. The last of those is the one most often missed, because a tired spring looks almost exactly like a new one, and it is the one this part's diagnosis is built around.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e⚙️ Functional Purpose\u003c\/h2\u003e\n\u003cp\u003eThe set's engineering role is shut-off. The core seals the line, and the spring sets how hard and how soon it seals. Between them they decide when liquid leaves the aircraft and when it stops.\u003c\/p\u003e\n\u003cp\u003eIn the spray system the core and spring:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eClose the line when spray pressure falls, so liquid left in the hoses stays in the hoses\u003c\/li\u003e\n\u003cli\u003eHold the valve shut while the aircraft turns, ferries, lands and sits on the trailer\u003c\/li\u003e\n\u003cli\u003eSet the line pressure needed to open the valve, so spray starts cleanly instead of dribbling\u003c\/li\u003e\n\u003cli\u003eKeep each valve on the aircraft closing at the same point, so the swath starts and ends evenly\u003c\/li\u003e\n\u003cli\u003eStop chemical from dripping onto the airframe, the landing gear and the ground under a parked aircraft\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhat they do not do matters as much:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThey do not pump, meter or measure liquid; the pump and the flow meter do that\u003c\/li\u003e\n\u003cli\u003eThey do not switch the spray on or off; the flight controller and the pump control do that\u003c\/li\u003e\n\u003cli\u003eThey do not filter; a core is damaged by debris, it does not stop it\u003c\/li\u003e\n\u003cli\u003eThey do not seal the outside of the valve body; the body's sealing rings and the hose fittings do that\u003c\/li\u003e\n\u003cli\u003eThey have no wiring and no electrical function\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThat division of labour is why a weak leak-proof valve rarely grounds the aircraft. Spraying still works. It is also why the fault is so easy to blame on something else.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e🔍 Diagnosis — the spring loses its push long before it looks worn\u003c\/h2\u003e\n\u003cp\u003eWhen an Agras starts dripping after the spray stops, the first part people look at is the valve core, because it is the part they can see wearing. They pull it, wipe it, find nothing wrong, and put it back. The drip comes back.\u003c\/p\u003e\n\u003cp\u003eThe part that has changed is often the spring. A compression spring that has been squeezed through thousands of cycles, in chemical, in heat, slowly takes a set: it gets a little shorter and pushes a little less. It does not crack. It does not rust through. It still looks like a spring. But a spring that pushes less closes the valve later, and more softly, and lets the last of the line pressure weep past the core instead of shutting it off.\u003c\/p\u003e\n\u003cp\u003eThat is why the set pairs a core with a spring, and why the useful inspection is a comparison, not a look. A worn spring cannot be judged on its own. It can be judged in seconds against a new one.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSigns the core and spring are no longer closing the valve:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDrips from a nozzle or sprinkler after the spray switch is off\u003c\/li\u003e\n\u003cli\u003eA wet patch under a parked aircraft that was dry when it landed\u003c\/li\u003e\n\u003cli\u003eLiquid running down the arm or landing gear after the end of a pass\u003c\/li\u003e\n\u003cli\u003eOne nozzle that keeps dripping while the others stop cleanly\u003c\/li\u003e\n\u003cli\u003eSpray that dribbles at the start of a pass instead of starting crisply\u003c\/li\u003e\n\u003cli\u003eChemical residue building up on the airframe below one valve\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eBefore condemning the core and spring, rule out what imitates them:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDebris on the seat\u003c\/strong\u003e — a grain of grit or dried residue holds a good core off its seat; flush the valve and clean the core first\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA damaged sealing ring in the valve body\u003c\/strong\u003e — a flattened, cut or hardened ring leaks with any core; inspect it while the valve is open\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA loose or cracked hose fitting\u003c\/strong\u003e — a leak at a joint upstream can look like a drip from the valve\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA filter that is damaged or missing\u003c\/strong\u003e — it will not cause the drip, but it will keep sending debris that causes it again\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eUse a new spring from this set as your reference.\u003c\/strong\u003e With the valve open, stand the old spring and a new one side by side on a flat surface. If the old spring is visibly shorter, it has lost its push, and the valve will not close the way it was built to. Then look at the core's sealing face and flange in good light for scoring, swelling, chips or a ridge worn into it.\u003c\/p\u003e\n\u003cp\u003eClear those checks first, while the valve is already open and that information is still cheap. If the spring is short or the core's sealing face is damaged, replace the core and spring together as a set rather than refitting one tired half next to one new half.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e⚠️ Common Replacement Indicators\u003c\/h2\u003e\n\u003cp\u003eReplace the core and spring in a leak-proof valve when inspection confirms one of these:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAn old spring that stands visibly shorter than a new spring from the set\u003c\/li\u003e\n\u003cli\u003eA spring that is kinked, bent out of line, or has coils touching at rest\u003c\/li\u003e\n\u003cli\u003eCorrosion or pitting on the spring wire\u003c\/li\u003e\n\u003cli\u003eScoring, nicks or a worn ridge on the core's sealing face or flange\u003c\/li\u003e\n\u003cli\u003eA core that is swollen, cracked or chipped at a vane or at the flange\u003c\/li\u003e\n\u003cli\u003eA core that sticks in its bore after cleaning\u003c\/li\u003e\n\u003cli\u003eA valve that still drips after the seat has been cleaned and the sealing ring checked\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eInspect these first, because they produce similar symptoms:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe sealing rings in the leak-proof valve body\u003c\/li\u003e\n\u003cli\u003eHose fittings and joints between the pump and the nozzles\u003c\/li\u003e\n\u003cli\u003eThe spray filters, for damage or missing elements\u003c\/li\u003e\n\u003cli\u003eThe nozzle or sprinkler head itself, for cracks\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThere is no published service interval for these cores and springs. They are replaced when the valve drips, the spring has shortened, or the core is damaged, not on a schedule.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e📐 Specifications\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eProduct name:\u003c\/strong\u003e DJI Agras T40 OEM Leak-Proof Valve Core Set (10 Sets)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDJI family:\u003c\/strong\u003e Agras\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePrimary aircraft:\u003c\/strong\u003e DJI Agras T40\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAlso listed for:\u003c\/strong\u003e DJI Agras T20P\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFitment basis:\u003c\/strong\u003e Identified for the DJI Agras T40 and T20P\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAircraft system:\u003c\/strong\u003e Spraying — leak-proof (anti-drip) valves\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eComponent type:\u003c\/strong\u003e Valve core and spring set\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMaterial number:\u003c\/strong\u003e DJI has used more than one number for this position, so we match against the one you removed\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQuantity:\u003c\/strong\u003e 10 sets — 10 valve cores and 10 springs\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eForm:\u003c\/strong\u003e Valve core: moulded body with a cross-shaped stem and a round flange collar. Spring: straight open-wound coil compression spring\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMaterial:\u003c\/strong\u003e Valve core material not published for this part; springs are steel\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eColour:\u003c\/strong\u003e Valve cores black; springs bare metal\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDimensions:\u003c\/strong\u003e Not published for this part\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e Not published for this part\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpring rate:\u003c\/strong\u003e Not published for this part\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eElectrical:\u003c\/strong\u003e None — mechanical parts with no wiring\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eConnector:\u003c\/strong\u003e None\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMounting position:\u003c\/strong\u003e Inside the leak-proof valves of the spray line; the core slides in the valve body with the spring behind it\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInstallation method:\u003c\/strong\u003e Fitted inside the opened valve body; the valve is reassembled over them\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHardware included:\u003c\/strong\u003e None — valve bodies and sealing rings are not supplied\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eService adjustability:\u003c\/strong\u003e None — the part is correct or it is not, with no adjustment or app setting that compensates\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCondition:\u003c\/strong\u003e Brand new\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eClassification:\u003c\/strong\u003e DJI OEM spray system component\u003c\/p\u003e\n\n\u003chr\u003e\n\u003ch2\u003e🛠️ Installation \u0026amp; Maintenance\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eBefore installation\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePower the aircraft down and remove the battery\u003c\/li\u003e\n\u003cli\u003eEmpty the tank and flush the spray system with clean water so you are not opening valves full of chemical\u003c\/li\u003e\n\u003cli\u003eWear chemical-resistant gloves and eye protection; residue collects inside leak-proof valves\u003c\/li\u003e\n\u003cli\u003ePhotograph each valve before you open it, so the order of parts and the orientation of the core are on record\u003c\/li\u003e\n\u003cli\u003eLay a new core and spring beside the old ones and compare stem shape, flange collar and spring form\u003c\/li\u003e\n\u003cli\u003eWork on one valve at a time so cores, springs and rings from different valves never mix\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDuring installation\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eOpen the valve body and note which way the core faces and which end of it the spring sits against\u003c\/li\u003e\n\u003cli\u003eRemove the old core and spring and stand the old spring beside a new one to compare length\u003c\/li\u003e\n\u003cli\u003eClean the bore and the seat with clean water and a soft brush; do not scrape the seat\u003c\/li\u003e\n\u003cli\u003eInspect the valve body's sealing ring and replace it separately if it is flattened, cut or hardened\u003c\/li\u003e\n\u003cli\u003eFit the new spring and the new core in the same orientation as the parts you removed\u003c\/li\u003e\n\u003cli\u003eCheck that the core moves freely against the spring and returns fully when released\u003c\/li\u003e\n\u003cli\u003eReassemble the valve by hand first; DJI does not publish a torque figure for these fittings, so close them snugly without crushing the body or the ring\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAfter installation\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFill the tank with clean water only and run the pump briefly\u003c\/li\u003e\n\u003cli\u003eStop the pump and watch each nozzle; the drip should stop promptly\u003c\/li\u003e\n\u003cli\u003eCheck every opened valve and fitting for weeping at the outside of the body\u003c\/li\u003e\n\u003cli\u003eLeave the aircraft standing for a few minutes and check the ground under each nozzle\u003c\/li\u003e\n\u003cli\u003eKeep the remaining sets dry and clean, together, for the next valve\u003c\/li\u003e\n\u003cli\u003eRecord the replacement in the maintenance log\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eMaintenance between jobs.\u003c\/strong\u003e Flush the spray system with clean water at the end of every working day so residue does not dry on the cores and seats. Keep the filters in place and intact; debris is what scores cores. Each time a valve is opened for cleaning, stand its spring next to a new one from the set. A spring that has shortened is the cheapest early warning this part gives.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e🚜 Necessary For\u003c\/h2\u003e\n\u003cp\u003eThis set is for operators and technicians who want the spray system to stop when it is told to stop:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDJI Agras T40 operators chasing drips after the spray switch is off\u003c\/li\u003e\n\u003cli\u003eDJI Agras T20P operators (identified fitment)\u003c\/li\u003e\n\u003cli\u003eCommercial spray applicators who need a clean shut-off at every field edge and sensitive boundary\u003c\/li\u003e\n\u003cli\u003eAgras service centres and repair technicians who rebuild spray systems at the end of a season\u003c\/li\u003e\n\u003cli\u003eFleet managers who want matched spare cores and springs on hand for every aircraft\u003c\/li\u003e\n\u003cli\u003eGrowers flying their own aircraft who are tired of chemical on the trailer floor\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eThis is not the part you need if:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe leak is at the outside of a valve body or a hose joint — that is a sealing ring or a fitting, not the core\u003c\/li\u003e\n\u003cli\u003eYou fly a T100 and need the valve's sealing ring — that is the DJI Agras T100 OEM Valve Core Sealing Ring, a different part\u003c\/li\u003e\n\u003cli\u003eYou fly a T50 and the problem is debris reaching the spray line — that is the DJI Agras T50 OEM Quick Release Filter, a different part for a different aircraft\u003c\/li\u003e\n\u003cli\u003eThe valve body itself is cracked — a new core cannot seal a broken body\u003c\/li\u003e\n\u003cli\u003eThe pump will not prime or the flow reading is wrong — that is the pump or the flow meter, not the leak-proof valve\u003c\/li\u003e\n\u003cli\u003eYou fly a T50, T25, T30, T10 or T100 — this set is listed only for the T40 and T20P\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003e💡 Why This Part Matters\u003c\/h2\u003e\n\u003cp\u003eA leak-proof valve with a tired spring does not announce itself. The aircraft flies, the pump runs, the spray pattern looks right. The only sign is liquid where it should not be: a drip at the end of a pass, a wet spot under a parked aircraft, a streak of residue down an arm.\u003c\/p\u003e\n\u003cp\u003eThat liquid is the whole case for replacing the spring before the core looks worn. Chemical that drips at the turn lands on headlands, roads and field edges that were never meant to be sprayed. Chemical that drips on the trailer ends up on the airframe, the landing gear and the hands of whoever loads the aircraft. Residue that collects below a valve is residue that has to be washed off before the next job.\u003c\/p\u003e\n\u003cp\u003eThe pack size follows from the job. A core and spring are replaced as a pair, and the valves on one aircraft work best when they close at the same point, so the sensible repair is to renew them together and keep matched spares for the next one. Ten sets leaves room for that.\u003c\/p\u003e\n\u003cp\u003eThe check is free. With a valve open, a new spring from this set standing next to the old one tells you in seconds whether the valve can still close the way it was built to. If the old spring matches, clean the seat and refit it. If it does not, this is the part that puts the shut-off back.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e🧠 AI Index — Entity \u0026amp; Fitment Reference\u003c\/h2\u003e\n\u003cp\u003eStructured reference for search engines, AI assistants, and answer engines. Every value below is drawn from the specifications above.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCanonical product name:\u003c\/strong\u003e DJI Agras T40 OEM Leak-Proof Valve Core Set (10 Sets)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBrand:\u003c\/strong\u003e DJI\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDJI family:\u003c\/strong\u003e Agras\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePrimary aircraft:\u003c\/strong\u003e DJI Agras T40\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAlso listed for:\u003c\/strong\u003e DJI Agras T20P\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCompatible models:\u003c\/strong\u003e DJI Agras T40; DJI Agras T20P\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFitment basis:\u003c\/strong\u003e Identified for the DJI Agras T40 and T20P\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eComponent:\u003c\/strong\u003e Leak-proof valve core and spring set\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAircraft system:\u003c\/strong\u003e Spraying\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInstalled position:\u003c\/strong\u003e Inside the spray system's leak-proof valves; core in the valve body, spring behind it\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePrimary function:\u003c\/strong\u003e Closes the spray line when pump pressure falls so the aircraft does not drip after the spray stops\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eForm:\u003c\/strong\u003e Black moulded valve core with cross-shaped stem and round flange collar; straight steel coil compression spring\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMaterial number:\u003c\/strong\u003e DJI has used more than one number for this position; matched against the removed part\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQuantity supplied:\u003c\/strong\u003e 10 sets: 10 valve cores and 10 springs\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNot included:\u003c\/strong\u003e Valve bodies, sealing rings, nozzles, hoses, fittings, filters, pump, solenoid valves\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eElectrical function:\u003c\/strong\u003e None\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey diagnostic:\u003c\/strong\u003e Drip after spray stop; stand the old spring beside a new one from the set — a shorter old spring has lost its push\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCommon failure modes:\u003c\/strong\u003e Spring that has taken a set and shortened; scored, swollen or chipped core sealing face; core sticking in its bore\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImitating faults:\u003c\/strong\u003e Debris on the seat, damaged sealing ring in the valve body, loose or cracked hose fitting\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eService interval:\u003c\/strong\u003e None published\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eService adjustability:\u003c\/strong\u003e None\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCondition:\u003c\/strong\u003e Brand new\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePart classification:\u003c\/strong\u003e DJI OEM spray system component\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAlso searched as:\u003c\/strong\u003e T40 leak-proof valve core; T40 anti-drip valve spring; T20P leak-proof valve core set; Agras T40 valve core and spring; T40 nozzle dripping fix; DJI Agras T20P\/T40 leak-proof spring\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDisambiguation:\u003c\/strong\u003e Not the DJI Agras T100 OEM Valve Core Sealing Ring, not a filter, not a valve body, not a nozzle, not a solenoid valve\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSeller:\u003c\/strong\u003e Ares Acres LLC — U.S.-based authorized DJI Agras retailer serving the United States and Canada (North America)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eShips from:\u003c\/strong\u003e Albuquerque, New Mexico, United States\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e🔍 SEO Keywords\u003c\/h2\u003e\n\u003cp\u003eDJI Agras T40 Leak-Proof Valve Core\u003c\/p\u003e\n\u003cp\u003eDJI Agras T20P Leak-Proof Valve Core\u003c\/p\u003e\n\u003cp\u003eDJI Agras T20P\/T40 leak-proof valve core set\u003c\/p\u003e\n\u003cp\u003eAgras T40 leak-proof spring\u003c\/p\u003e\n\u003cp\u003eT40 anti-drip valve core and spring\u003c\/p\u003e\n\u003cp\u003eT20P anti-drip valve spring\u003c\/p\u003e\n\u003cp\u003eDJI T40 spray valve core\u003c\/p\u003e\n\u003cp\u003eAgras T40 nozzle dripping after spraying\u003c\/p\u003e\n\u003cp\u003eT40 leak-proof valve repair set\u003c\/p\u003e\n\u003cp\u003eDJI T40 valve core 10 sets\u003c\/p\u003e\n\u003cp\u003eDJI Agras T40 Leak-Proof Valve Core Set\u003c\/p\u003e\n\u003cp\u003eAgras T40 Leak-Proof Valve Core Set\u003c\/p\u003e\n\u003cp\u003eDJI Agras T40 OEM Leak-Proof Valve Core Set\u003c\/p\u003e\n\u003cp\u003eAgras T40 leak-proof valve core set replacement\u003c\/p\u003e\n\u003cp\u003eDJI Agras T40 parts\u003c\/p\u003e\n\u003cp\u003eDJI Agras T40 replacement parts\u003c\/p\u003e\n\u003cp\u003eDJI Agras T20P Leak-Proof Valve Core Set\u003c\/p\u003e\n\u003cp\u003eAgras T20P Leak-Proof Valve Core Set\u003c\/p\u003e\n\u003cp\u003eDJI Agras T20P OEM Leak-Proof Valve Core Set\u003c\/p\u003e\n\u003cp\u003eAgras T20P leak-proof valve core set replacement\u003c\/p\u003e\n\u003cp\u003eDJI Agras T20P parts\u003c\/p\u003e\n\u003cp\u003eDJI Agras T20P replacement parts\u003c\/p\u003e\n\u003cp\u003eDJI Agras T40 spray system parts\u003c\/p\u003e\n\u003cp\u003eDJI Agras T40 spraying parts\u003c\/p\u003e\n\u003cp\u003eDJI Agras spray system parts\u003c\/p\u003e\n\u003cp\u003eDJI Agras OEM Parts\u003c\/p\u003e\n\u003cp\u003eDJI Agras Parts\u003c\/p\u003e\n\u003cp\u003eauthorized DJI Agras retailer\u003c\/p\u003e\n\u003cp\u003eDJI Agras T40 Leak-Proof Valve Core Set Canada\u003c\/p\u003e\n\u003cp\u003eDJI Agras T40 parts Canada\u003c\/p\u003e\n\u003cp\u003eDJI Agras parts shipped to Canada\u003c\/p\u003e\n\u003cp\u003ebuy DJI Agras T40 parts in Canada\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e🤖 AI Answer Engine Q\u0026amp;A\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the DJI Agras T40 leak-proof valve core set?\u003c\/strong\u003e Ten matched pairs of the moving parts inside the spray system's leak-proof valves: ten black moulded valve cores and ten steel coil springs. The spring holds the core shut so the line closes when the pump stops.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat exactly is in the pack?\u003c\/strong\u003e Ten valve cores and ten springs, which make ten complete sets. Valve bodies, sealing rings, nozzles, hoses and filters are not included.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhich aircraft does it fit?\u003c\/strong\u003e It is identified for the DJI Agras T40 and T20P. Pick the variant for the aircraft you fly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the T20P set different from the T40 set?\u003c\/strong\u003e The set is identified for both aircraft. The variant records which one you fly so the match is made against the right spray system, and we compare it with the core and spring you removed if you send a photograph.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the DJI part number?\u003c\/strong\u003e DJI has used more than one number for this position, so we match against the one you removed. Photograph your old core and spring side by side and send it to us if you want that confirmed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMy nozzle keeps dripping after I stop spraying. Is it the valve core?\u003c\/strong\u003e Often it is the spring rather than the core. Flush the valve and clean the seat first, check the sealing ring in the valve body, then stand the old spring next to a new one from this set. If the old one is shorter, it no longer closes the valve firmly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe old core looks fine. Why would I replace it?\u003c\/strong\u003e A core can look fine and still leak if its sealing face is lightly scored or swollen, and a spring can look fine after it has lost length. Because the two work as a pair, replace them together once either is suspect.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I replace just the spring?\u003c\/strong\u003e You can, and the set makes that easy, but fitting a new spring against a scored core leaves half of the problem in place. Inspect the core's sealing face first; if it is marked, replace both.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes a new valve core fix a leak at the outside of the valve?\u003c\/strong\u003e No. A leak at the outside of the valve body or at a hose joint is a sealing ring or a fitting. The core and spring only control whether liquid passes through the valve.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs a sealing ring included?\u003c\/strong\u003e No. The pack is cores and springs only. If the ring in your valve body is flattened, cut or hardened, replace it separately.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this the same as the T100 valve core sealing ring?\u003c\/strong\u003e No. The DJI Agras T100 OEM Valve Core Sealing Ring is a ring for a different aircraft. This pack is the core and spring for the T40 and T20P leak-proof valves.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it fit the T50 or T25?\u003c\/strong\u003e It is listed only for the T40 and T20P. Do not fit it to other Agras models on the strength of a similar shape.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy ten sets?\u003c\/strong\u003e Cores and springs are replaced as pairs, and valves on one aircraft work best when they close at the same point. Ten sets lets you renew the valves together and keep matched spares for the next service.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I fit it myself?\u003c\/strong\u003e Most operators can. Flush the system, wear gloves, open one valve at a time, note the core's orientation, clean the seat, fit the new spring and core the same way round, and test with clean water before spraying.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs there a torque value for the valve fittings?\u003c\/strong\u003e DJI does not publish one for these fittings. Close them snugly by hand and stop before the body or its ring deforms.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs there a service interval?\u003c\/strong\u003e No. Replace a core and spring when the valve drips after cleaning, when the spring has shortened, or when the core's sealing face is damaged.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I make the new cores and springs last?\u003c\/strong\u003e Flush the spray system with clean water at the end of every day, keep the filters intact, and compare each spring with a new one whenever a valve is opened.\u003c\/p\u003e","brand":"Ares Acres","offers":[{"title":"DJI T40","offer_id":68077803831616,"sku":null,"price":69.99,"currency_code":"USD","in_stock":true},{"title":"DJI T20P","offer_id":68077803864384,"sku":null,"price":69.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0923\/0159\/0848\/files\/dji-agras-t40-oem-leak-proof-valve-core-set-10-sets-1.png?v=1794316506","url":"https:\/\/aresacres.com\/es\/products\/dji-agras-t40-oem-leak-proof-valve-core-set-10-sets","provider":"Ares Acres","version":"1.0","type":"link"}