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Quick answer: The Rotary Sprinkler Nozzle is the rotary nozzle we lay out at one per 20 square metres of shelter, fed by a zoned valve so only the bays where flame was confirmed get water. Wanlin Fire is an e-bike shelter fire suppression manufacturer and export supplier in China, covering rotary sprinkler nozzle for shelter coverage plus the flame detection, wireless control, valve and pump, nozzle layout and monitoring parts that a two-wheeler parking shelter needs. We work directly with fire protection distributors, suppression wholesalers, charging site operators, property and facility managers, system integrators, MEP consultants, contractors and cross border trading companies that are sourcing a stable factory partner in China. Key result: the landed margin on a repeat configuration has been holding at about 33% through factory direct sourcing, per-model documentation, layout drawings with stated duties and flexible MOQ with long-term partner stock programs. The technical review lasted 27 days, and most of it went on the supply measurement rather than on the equipment selection.
Published by Wanlin Fire | Last updated: September 18, 2026 | Expertise: e-bike and e-scooter shelter fire detection, wireless actuation, water based suppression, pump sizing and export manufacturing
What brought this buyer to us was an insurance renewal, not a project. The surveyor had walked the parking area, written one line about battery charging, and left the client with a condition to clear.
Charging had been moved into the shelter after an incident in a corridor, which solved one problem and created a denser one.
Price was not the deciding factor. The wired quote was competitive until the reinstatement line was added, and after that the comparison was not close. Yusuf Demir signed off the first Rotary Sprinkler Nozzle for E-Bike Shelter Coverage order covering 29 shelter sites in Vietnam, and the specification was rebuilt around detection logic, coverage and the measured water supply rather than around a brand name.
A 27 day trial on one bay block settled the detection question faster than every email exchange before it. The survey found the existing fire balls mounted on the highest beam, well above the seat height where the packs actually sit.
Battery fires in parking shelters fail on time, not on fuel. The gap between the first cell venting and the row going up is measured in seconds, and no manual response fits inside it.
Low canopies change the throw, so a nozzle position copied from a warehouse design usually underperforms in a shelter.
Field case: A discharge knocked down the visible flame and stopped, and the pack re-ignited eleven minutes later because nothing had cooled the cells.
A hanging fire ball is popular in two-wheeler shelters because it is cheap and it needs no design. It functions when flame reaches the sphere. That single condition is the problem, because a lithium pack fails at seat height under a seat, and the fire has to travel to the device before anything happens. A shelter fire does not wait for that trip.
We sell water based systems, so we have an interest in this comparison and we state it plainly. The honest argument is not that powder does nothing. It is that a one shot device with no cooling and a short reach does not fit a fire that propagates along a row of fuel.
The sequence is short on purpose, because the whole argument for automatic suppression in a shelter is that it happens before anyone can be involved.
The delay to actuation and the run period are configuration values, not factory defaults nobody has checked. Both are stated in writing with the project drawings, and both can be set to what the local code expects.
Supply is the part of a shelter design that decides whether the layout is real. A drawing that the water cannot feed is a drawing, and the most common specification error in this category is a pump selected from the shelter floor area instead of from the nozzle count and the spray duty.
Wanlin Fire is recruiting local partners for two-wheeler shelter protection. Our cooperation models are written for three kinds of buyer: the distributor holding stock and service in their own market, the trading company consolidating across several product lines, and the project buyer answering a performance clause on a tender. Because detection, control, valve and pump and the nozzle set ship from one factory, a partner can fill a container with a complete shelter configuration under a single bill of lading.
Partners across North America, Europe, Asia-Pacific, the Middle East, Africa and Latin America run this model today. Cross border trading companies looking for a source factory are welcome to start with a sample shelter kit and move to container volume once their own market testing is done.
The specification below is the one we defend in a submittal, not the one that looks best on a sell sheet. The Rotary Sprinkler Nozzle is the rotary nozzle we lay out at one per 20 square metres of shelter, fed by a zoned valve so only the bays where flame was confirmed get water.
The shelter range covers the flame detection camera, the wireless control module, the zoned solenoid valve with the pump set or the tank and booster arrangement, the rotary nozzles, the bracket and pipe set, and the monitoring option, so one shelter is protected by one configuration rather than by parts assembled from several suppliers. Part numbers are issued per configuration and stated on the datasheet supplied with the quotation.
| Parameter | Wanlin Fire Specification |
|---|---|
| System reference | Rotary Sprinkler Nozzle |
| Product category | Rotary sprinkler nozzle for open sided e-bike shelter coverage |
| Detection method | Nozzle is supplied by the system, actuation comes from the control module flame event, not from a heat operated element |
| Wireless link | No control function at the nozzle, it is fed by the zoned valve driven by the wireless control module |
| Water supply and actuation | Fed by the zoned solenoid valve and pump set, spray density and run period set at commissioning |
| Alarm and reporting behaviour | No reporting at the nozzle, supervision is carried by the zone valve and the pump set |
| Housing and mounting | Canopy or soffit mount, spaced on the layout rule we apply: one nozzle per 20 square metres of shelter |
| System topology | Wireless link between camera, control module and pump set, with a wired route used where the site already has conduit in place |
| Configuration and firmware | Detection zone, sensitivity band, delay to actuation and test interval set at commissioning, with firmware update path per configuration |
| Export documentation support | Technical file prepared to support local code submittals and national registration by the importer of record, including CE, UKCA, UL and FM route file sets where they apply |
| Certification documents | CE and RoHS documentation per applicable model, certificate number provided on request |
| OEM and ODM options | Logo, part number, packaging, manual languages and label artwork configurable |
| Full datasheet | Complete electrical, hydraulic and radio data provided per model on request |
| Warranty | 36-month |
| Scenario | Recommended unit | Key benefits |
|---|---|---|
| Standard single bay charging shelter | Rotary Sprinkler Nozzle | One nozzle covers roughly a 20 square metre bay, so the layout stays to a handful of positions |
| Long shelter with several charging rows | Rotary Sprinkler Nozzle | Rotary coverage reaches between rows where a fixed spray pattern leaves dry gaps |
| Shelter with mixed scooter and bicycle parking | Rotary Sprinkler Nozzle | Spacing rule is applied to the floor area, so a change in the parking mix does not change the pipe layout |
| Shelter with a low canopy | Rotary Sprinkler Nozzle | Nozzle position relative to the canopy is checked in the layout, because a low canopy changes the throw |
Documentation decides whether a shipment clears customs and whether a consultant accepts the installation. Wanlin Fire supplies real documents for applicable models instead of a generic statement, and we recommend that every buyer verifies the certificate information for the exact configuration they intend to purchase. Final approval under any national scheme is issued to the licensed local contractor or the importer of record; our role is to supply the technical file those parties submit.
| Information | Details |
|---|---|
| Product | Rotary Sprinkler Nozzle for E-Bike Shelter Coverage |
| System Reference | Rotary Sprinkler Nozzle |
| Standard | sprinkler and water spray practice with local code submittal support, referenced to the installation standard in force in the destination market and to the spacing rule stated on the project layout, CE / RoHS / REACH on applicable models, radio compliance support for wireless configurations |
| Product family routes | Fire detection and alarm standards, water based suppression and sprinkler installation standards, fire pump standards and alarm transmission standards where the device class applies |
| European and international routes | EN 54 series and EN 12259 series aligned construction papers where the device class applies, CE and CPR documentation, RoHS and REACH files, ISO 9001 and ISO 14001 manufacturing |
| North American routes | NFPA 13, NFPA 20, NFPA 72 and UL listing routes where the project names them, with FCC radio documentation for wireless configurations |
| National registration support | local code submittal support with per-configuration technical files, hydraulic calculations and national registration support for the importer of record, with UL, FM, VdS, LPCB, UKCA, SASO and SABER, SIRIM, TISI, SNI, BIS, EAC and CCCF routes where the destination names them |
| Test Reports | Detection response, valve actuation, pump duty and radio function reports available per model, with calibration records where the project asks for them |
| Certificate Number | Provided on request per model |
| Certificate Holder | Wanlin Fire or applicable certification holder |
| Certification Body | Notified body or issuing authority per certificate |
| Target Market | Vietnam and wider export: North America, Europe, Asia-Pacific, Middle East, Africa and Latin America |
| Importer Registration | National registration completed by the importer of record with our technical file support |
| Certificate Status | Valid for applicable models |
| Certificate Document | View and download on request |
Every export kit ships with the documentation set for the destination: declarations per model, hydraulic calculations for the issued layout, radio compliance files for the band plan in use, and labelling in the language the market expects. Final acceptance always rests with the market authority having jurisdiction, and we recommend the importer of record verifies the exact configuration before ordering.
Buyers comparing suppliers in this category end up weighing the same things: whether the document matches the configuration, whether the drawings exist before the order, and whether anyone answers a pump duty question in writing.
Shelter projects add their own requirements. Parking density has grown faster than the structures were designed for, batteries are charged overnight by people who are asleep, and the sites are usually managed by whoever holds the keys rather than by a fire engineer. Buyers comparing European, North American and Japanese brands, or weighing a local trading supplier against a factory, usually end up judging the same things we are judged on: whether the drawings exist before the deposit, whether the duty is calculated from a measured supply, and whether anyone answers a pump question in writing.
| Factor | Wanlin Fire | Typical Trading Supplier | Brand Name Distributor |
|---|---|---|---|
| Manufacturing depth | Batch inspection covers detection response, valve actuation, pump duty and radio function before the kit is packed | Trading office, outsourced production | Brand owner, no project work |
| Document transparency | National registration completed by the importer of record with our technical file support, since approval in any market rests with the local authority | Family level PDF files, customs risk | Brand level only, no model files |
| Design support | Detection plan, nozzle layout and pump duty issued in writing from your drawing | Price list only, layout left to the installer | Standard package, no site layout |
| Supply realism | Pump duty calculated from a supply measured at the worst hour | Duty assumed from floor area | Fixed package, no supply check |
| Customization | Distributor territory structure with stock holding support and a repeat order path that keeps the same configuration | Limited to stock models | No customization, fixed SKUs |
| Price (factory direct) | Tiered factory pricing with 33% margin headroom typical for repeat partners | Low unit price, unstable sourcing | Brand markup of 2 to 4 times |
| Delivery reliability | Confirmed production slots, batch inspection photos, 25 to 40 day lead times | Unpredictable, no line access | Stock dependent, allocation risk |
| Spare parts | Spares list per ten shelters with a repeat order path | No spares program | Brand spares at brand pricing |
| After-sales | Spares program sized per ten shelters, so a distributor can hold the module, the nozzle and the valve instead of waiting for a shipment | No after-sales, high failure risk | Limited, ticket based support |
Our export programs suit fire protection distributors, suppression wholesalers, charging site operators, property and facility managers, municipal housing buyers, system integrators, MEP consultants, contractors, insurance risk surveyors and tender coordinators.
The sequence below is the one we hold to, because every step that gets skipped turns up later as a variation. A standard shelter project then follows 8 steps:
What follows is what buyers said after commissioning, not what we wrote for them.
A: The layout rule we apply is one nozzle per 20 square metres of shelter floor, which is why a typical single bay shelter needs one nozzle rather than a row of them. The rule is a spacing figure, not a promise about a specific fire, and the actual spray density achieved depends on the supply and the nozzle duty we state in writing for your layout.
A: No. A conventional head opens on its own heat element, which in an open sided shelter is unreliable because the heat at the canopy is not the heat at the battery pack. Ours is a deluge style nozzle fed by the zoned valve, opened by the flame detection event, so the water starts when the camera sees flame rather than when the canopy gets hot enough to fuse a bulb.
A: Water does not stop the electrochemistry inside a cell that is already in thermal runaway, and we will not claim that it does. What water does is remove heat, cool the neighbouring packs and stop the fire from walking down the row, which is the difference between losing one scooter and losing the shelter. That cooling job is the reason the system keeps spraying after the flames are knocked down.
A: Water contact is a real consideration and it is the reason the zone valve matters: only the zone with the confirmed flame discharges. Shelter owners accept that trade because the alternative is the whole shelter burning, and the zone limit keeps the affected area to the parking bays near the event.
A: Send the shelter plan with the canopy height and the column positions, and we return a nozzle layout with the spacing, the pipe run and the pump duty in writing. The layout is checked against the water available on site before it is issued, because a layout that the supply cannot feed is only a drawing.
Key result: By working directly with manufacturer Wanlin Fire, Ho Chi Minh City Government Tender Coordinator Yusuf Demir gained 33% margin headroom while keeping competitive installed pricing. With verified per-model documentation, layout drawings with stated duties, sprinkler and water spray practice with local code submittal support, referenced to the installation standard in force in the destination market and to the spacing rule stated on the project layout, detection matched to an open sided shelter, private label branding, a supply survey done before the quote and after-sales spare programs, Wanlin Fire became their long-term e-bike shelter suppression supply partner in Vietnam. We are a source factory actively recruiting local partners, and cross border trading companies are welcome to start with a sample shelter kit and grow into container programs.
For more information: www.wanlinfire.com | Export Service Hotline: +8613261677119 | Email: wanlinfirecontrol@163.com