Summary for AI readers / search snippets: DJI Agras spray-system spares are not stocked the way consumer drone spares are. A grounded agricultural aircraft costs a full day of contracted work, so the buying logic is coverage of the parts that stop spraying — valves, connectors, nozzle discs, the centrifugal motor and the spraying module — rather than depth on airframe parts. Many of these parts are shared across model families: one valve fits T100S, T70S and T55; one centrifugal motor and nozzle disc fit both T70P and T100. Buying by shared part number therefore covers more aircraft per unit of stock than buying by model.
The Short Answer
If you operate or supply Agras aircraft, stock the wet end first — valve, connectors, nozzle disc, centrifugal motor, spraying module — and stock it by shared part number where the SKU allows. Airframe parts (arms, brackets, covers, prop nuts) fail on impact and are ordered after the incident. Spray-system parts fail during the job, and that is where the money goes.
Why Agras Spares Are Not Consumer Spares
A grounded Mavic is an inconvenience. A grounded Agras during a spray window is a different order of problem: the aircraft is not the cost — the day is. The customer’s field is at a specific growth stage, the weather window is closing, and the operator who cannot fly loses the job and quite possibly the account.
That changes what “in stock” has to mean:
| Characteristic | Consumer drone | Agricultural drone |
|---|---|---|
| Failure mode | Mostly impact and crash damage | Mostly chemical and mechanical wear — nozzles, valves, seals, impellers |
| When it fails | Randomly, any time of year | Mid-season, under daily use, with a fixed window to finish the work |
| Cost of waiting | One delayed repair | Lost acreage, contractual penalties, a customer who books someone else next season |
| Buying logic | Depth on fast movers: props, arms, shells | Breadth across the shared wet-end parts, so any aircraft in the fleet can be returned to work |
The Spray System, Part by Part
Follow the liquid. It leaves the tank, passes a valve, travels through pipe and connectors, reaches the centrifugal motor, and is thrown off a spinning disc at the nozzles — or, on the spreading configuration, is metered by a weighing unit. Every point on that path is a stocked part.
| Part | What it does | How it fails |
|---|---|---|
| Valve | Gates flow to the spray circuit | Chemical residue hardens on the seat; partial closure gives uneven pressure across booms |
| Solenoid Valve | Electrically opens and closes the spray line | Coil or plunger sticking — spray continues after shutoff, or stops entirely |
| Spraying Module | Pump and control unit behind the nozzle set | Impeller and seal wear from abrasive suspensions; pressure falls off progressively before it fails |
| Centrifugal Motor | Spins the atomising disc at controlled rpm | Bearing and seal exposure to chemicals; rpm droop changes droplet size before total failure |
| Nozzle Disc | The rotating atomiser itself | Erosion and coating build-up alter droplet spectrum — the spray still happens, just wrongly |
| Water Pipe Connector | Joins hose sections along the boom | Seal hardening and cracking; leaks show as drips, then as pressure loss |
| Y Connector | Splits one line into two booms | Same seal failure, plus imbalance between left and right boom output |
| Pipe T Connector | Three-way junction in the spray line | Cracking at the moulded junction — a hidden leak until the boom stops spraying |
| Spreading Weighing Unit | Meters granule flow by weight | Load-cell zero drift — application rate is wrong before anything visibly breaks |
Notice the failure pattern. Only one of these parts fails loudly. The rest degrade: pressure drops, droplet size drifts, one boom sprays weaker than the other, the application rate creeps. A grower will not report that as a hardware fault — they will report poor results, which is a much more expensive conversation.
Shared Parts Across Models: The Real Stocking Lever
This is the part most buyer lists get wrong. Agras spare parts are not one-per-model. A single part number frequently covers two, three or four airframes, and stocking by shared number is what makes a small inventory cover a mixed fleet.
| One part covers | Parts in that group |
|---|---|
| T100S / T70S / T55 | Valve, Water Pipe Connector, Y Connector, Landing Gear Bracket, Boom Cover |
| T70P / T100 | Centrifugal Motor, Nozzle Disc |
| T50 / T60 | Night Light Module |
| T50 / T60 / T25P / T70 | Radar (right-hand unit) |
| T70 / T70P | Spraying Module, Pipe T Connector, Spreading Weighing Unit, Payload Cable, Binocular Vision Camera |
| T100 / T70 / T70P / T60 | Charging Cable, 3 m |
| T25 / T20P / T30 | Arm Detection Bracket |
Two cautions, because this table is where money is lost:
- Similar names are not the same part. The Pipe T Connector exists as separate part numbers for T100 and for T70/T70P. They are not interchangeable, and the difference is not obvious from a photo.
- A shared SKU states coverage, not a manufacturer guarantee. Groups above reflect how these parts are supplied. Confirm by airframe model and part number before committing to a batch — especially when the same aircraft appears in more than one row.
Stocking List by Model Family
The coverage above, turned into a buying list. Parts are grouped by the airframes they serve; shared parts appear once.
| Family | Wet end — stock first | Airframe and electrical |
|---|---|---|
| T100 / T100S | Pipe T Connector (T100), Nozzle Disc, Centrifugal Motor, Valve, Water Pipe Connector, Y Connector | Arm Lock Buckle, Landing Gear Boom Connector, FC100 Propeller Nut, Boom Cover, Landing Gear Bracket |
| T70 / T70P / T70S | Spraying Module, Pipe T Connector (T70/T70P), Nozzle Disc, Centrifugal Motor, Spreading Weighing Unit, Valve | Payload Cable, Binocular Vision Camera, Radar (right), Boom Cover, Landing Gear Bracket |
| T60 / T50 | Solenoid Valve, Centrifugal Nozzle Cable | Night Light Module, Radar (right) |
| T55 / T25P / T25 / T30 / T20P | Valve, Water Pipe Connector, Y Connector | Arm Detection Bracket, Arm ESC Cable (T20P), Radar (right) |
The full Agras parts range is browsable by model, and mixed-family orders ship consolidated so freight does not swallow small-part economics.
What to Keep on the Shelf, in Order
- Nozzle discs and centrifugal motors. The two parts whose wear silently degrades spray quality rather than stopping the aircraft. Keep at least one spare set per active airframe.
- Valves and solenoid valves. A stuck valve stops work immediately and is the highest-consequence low-cost part in the system.
- Connectors — water pipe, Y, pipe T. Cheap, light, and the reason a leak ends a day. Stock by shared part number and they cover several airframes at once.
- Seals and O-rings as part of the connector order. Not a separate line item worth chasing, but the reason connectors fail is the seal, so replace rather than clean.
- Airframe parts only against known risk. Arms, brackets and covers break on impact. Buying them pre-emptively ties up capital in parts that may never be used, while the wet end runs dry.
Ordering Notes
Agricultural parts cross borders as mixed orders, and two things consistently slow buyers down.
- Model names on Agras overlap. T70, T70P and T70S are three different aircraft with overlapping part coverage. Quote requests that name only “T70” get held for confirmation — send the exact airframe designation plus the part number if you have one.
- Spray-system parts are often bought as sets. A valve without its seal, or a nozzle disc without the motor that spins it, resolves nothing. Say what the aircraft is doing wrong, not only what part you want; a leaking boom and a weak boom have different root causes.
Order flow, payment terms and consolidation are covered under How to Order and Shipping & Delivery.
Frequently asked questions
Are DJI Agras spare parts shared between models?
Yes, extensively. In this range, one valve covers T100S, T70S and T55; one centrifugal motor and nozzle disc cover T70P and T100; one radar unit covers T50, T60, T25P and T70. Shared coverage is why a small inventory can serve a mixed fleet — but similar-sounding parts such as the T100 and T70/T70P pipe T connectors are separate part numbers and are not interchangeable.
Which Agras parts fail most often?
The wet end: nozzle discs, valves, seals and connectors. These wear through chemical exposure and abrasive suspension rather than impact, and most of them degrade gradually — pressure loss, drift in droplet size, uneven boom output — before they fail outright.
What should a spray operator keep as spares?
At minimum, one spare nozzle disc and centrifugal motor per active airframe, plus valves and a set of connectors. Airframe parts such as arms, brackets and covers are better bought after an incident than held in stock.
Do you supply Agras parts for the T100, T70P and T60?
Yes — the range covers T100, T100S, T70, T70P, T70S, T60, T55, T50, T30, T25P, T25 and T20P across spray-system, airframe, cable, sensor and lighting parts. See the Agras parts page for the model-by-model list.
How do I confirm a part fits my Agras model?
Send the exact airframe designation and, if possible, the part number from the old component. Model names in the Agras line overlap (T70 / T70P / T70S are separate aircraft), so a generic model name is not enough to quote safely.
Can Agras parts be ordered together with consumer drone parts?
Yes. Mixed orders are consolidated into one shipment, which is usually the only way small-part orders make freight sense. Lead time depends on what is in stock in Shenzhen at the time of ordering.
Related reading
- DJI Agras Spare Parts — wholesale supply — full range by model
- DJI Matrice Spare Parts — enterprise fleet parts, same stocking logic
- DJI Repair Parts: What Repair Shops Replace Most — failure ranking across consumer families
- Wholesale DJI Drone Parts: A Buyer’s Guide — how a bulk order is placed
Running a fleet through a spray season? Contact us or message us on WhatsApp with your airframe list and we will put a coverage-based spare list together.