Oil burner nozzle selection must match the burner’s approved firing range, 펌프 압력, 스프레이 각도, pattern and fuel condition. A nozzle should not be substituted from appearance or thread size alone because capacity and distribution affect ignition, flame shape and combustion-chamber loading.
Oil burner nozzle selection requires matching calibrated capacity, specified pump pressure, spray angle and distribution pattern to the complete burner and combustion chamber. Two nozzles with a similar printed capacity are not necessarily interchangeable.
This technical guide explains the selection variables and verification process. It does not provide model-specific firing settings or authorize changes to listed heating equipment.
Safety boundary: Burner matching, nozzle replacement, commissioning and combustion adjustment must be performed by qualified personnel using the burner or appliance manufacturer’s approved data, calibrated combustion instruments and applicable safety procedures. Shut down and isolate fuel and electrical energy before service. Do not use this article to override listed equipment requirements.
Match the nozzle to the approved burner system
The nozzle meters fuel and forms a spray that must mix with the burner’s air pattern inside a defined chamber. Pump pressure changes actual flow; angle changes envelope; pattern changes how fuel is distributed. Ignition, retention head and chamber geometry must work with all three.
Engineering variables that change the decision
| Variable | Why it matters | What to record |
|---|---|---|
| Approved firing input | Defines the required fuel delivery for the appliance. | Manufacturer’s input and approved nozzle table. |
| 펌프 압력 | Changes flow and atomization. | Specified dynamic pressure and verified gauge. |
| 스프레이 각도 | Must fit the chamber and burner head. | Approved angle, chamber diameter and insertion. |
| 스프레이 패턴 | Must match air distribution and flame shape. | Approved solid, hollow or semi-solid designation. |
| Fuel condition | Viscosity and contamination affect atomization. | Fuel grade, temperature and filtration. |
| Combustion result | Confirms system operation after replacement. | Instrument readings required by procedure. |
A qualified selection workflow
- Identify the exact burner, appliance and approved firing range.
- Use the equipment manufacturer’s current nozzle table as the primary authority.
- Match capacity code, angle and spray pattern; verify the pressure basis.
- Confirm physical dimensions, connection and approved fuel compatibility.
- Install with clean tools and the specified electrode and head setup.
- Commission with calibrated instruments and document final safe operation.
Common failure modes and diagnostic checks
| Observed condition | Likely checks |
|---|---|
| Soot after substitution | Stop and verify approved nozzle, air setup, draft and combustion results. |
| Flame impingement | Check angle, 무늬, insertion and chamber compatibility. |
| Delayed ignition | Investigate ignition, fuel pressure, atomization and burner condition. |
| Input differs from expectation | Verify pressure basis, nozzle identity and calibrated fuel measurement. |
| Repeated fouling | Review fuel quality, 여과법, shutdown heat and chamber condition. |
Validation and release checklist
A qualified technician must verify safe ignition, stable flame, draft, smoke and combustion values required by the appliance procedure across applicable firing states. Record the exact nozzle marking and pump pressure.
- Confirm materials, connections, 압력, temperature and fluid compatibility against approved product data.
- Test the complete operating system, not an isolated nozzle, under representative demand.
- Record pressure, 흐름, 무늬, orientation and acceptance limits for maintenance comparison.
- Revalidate after cleaning, replacement or a process change.
Information to send with an RFQ
Provide burner and appliance manufacturer and model, approved nozzle capacity code, spray angle and pattern, fuel type and approved viscosity range, pump pressure specified by the manufacturer, chamber geometry, duty, 연결, filtration and the qualified technician’s combustion-test requirements. Do not substitute a nozzle from nominal capacity alone.
자주 묻는 질문
Can a nozzle with the same capacity code always replace the old one?
아니. Angle, 무늬, pressure basis, manufacturer tolerance and appliance approval also matter.
Does raising pump pressure only increase flow?
아니. It also changes atomization and burner operation; never change it outside approved data.
Can flame appearance confirm correct setup?
아니. Instrumented combustion testing is required.
안전: Burner setup involves fuel, ignition and combustion hazards. Follow the burner manufacturer’s service instructions and applicable codes, isolate energy and fuel before service, and use a qualified combustion technician for commissioning.
Oil burner nozzle selection data
| Input | Why it matters | Required source |
|---|---|---|
| Approved firing rate | Defines fuel demand for the appliance. | Burner or appliance rating and service data. |
| 펌프 압력 | Changes nozzle flow from its reference rating. | Measured operating pressure and nozzle data. |
| 스프레이 각도 | Must fit chamber and burner geometry. | Manufacturer-specified angle. |
| 스프레이 패턴 | Controls fuel distribution within the flame envelope. | Approved hollow, solid or intermediate pattern. |
| Fuel condition | 점도, temperature and contamination affect atomization. | 연료 사양, filtration and operating condition. |
Seven engineering checks
- Identify the burner, appliance and approved nozzle specification.
- Confirm required firing rate rather than copying an unknown installed nozzle.
- Measure pump pressure using the approved service procedure.
- Match spray angle and pattern to the combustion chamber.
- Verify fuel grade, 온도, filtration and return arrangement.
- Install and set electrodes, head and air controls to manufacturer data.
- Commission with proper combustion instruments and safety checks.
Flow and pressure relationship
For the same nozzle and fuel conditions, flow is often estimated using a square-root pressure relationship: Q₂ = Q₁ × √(P₂/P₁). Treat this as an engineering estimate and use the nozzle supplier’s rated data. Pump pressure must be measured during operation, not inferred from a nominal setting.
Oil burner nozzle selection must still remain inside the burner’s approved operating range after any pressure adjustment.
Angle and pattern are not interchangeable
Two nozzles with the same nominal flow can produce different flame envelopes. A wider spray can interact differently with chamber walls; a narrow or different distribution can change mixing near the burner head. Use only combinations approved for the appliance and verify combustion after replacement.
Commissioning evidence
After installation, inspect for leaks, verify safe ignition and use calibrated combustion instruments following the equipment procedure. Record nozzle designation, 펌프 압력, draft, air setting and measured combustion results. Do not judge adjustment by flame color alone.
A controlled oil burner nozzle selection record prevents later maintenance from replacing a nozzle with a visually similar but technically different part.
Next step
Treat the manufacturer-approved burner setup as the selection boundary. Review OD oil burner nozzle, review related Jeltecn nozzle products, 또는 send application data to Jeltecn for an engineering review.