Why a Nozzle Should Not Be Chosen Based On Orifice Diameter?

Non-specialized nozzle retailing platforms and no-brand standard market nozzle manufacturers tend to see nozzles through a perspective of simple, rigid machining processes – they often consider the only important requirement for a nozzle is the orifice diameter. However, the nozzle orifice diameter is not always so easily defined, take the example of the fan-shaped nozzle – its orifice is in the shape of an olive (or an eye), making it impossible to determine its orifice diameter by mere observation.

Nguyên lý phun của vòi phun hai thể lưu

Cấu trúc của hai thể lưu tương đối phức tạp, bên trong cần có hai kênh dẫn khí và chất lỏng, do các vấn đề về độ kín khí và độ kín của chất lỏng nên nó thường là thiết kế nhiều phần với cấu trúc phức tạp và giá thành cao.

Các loại nguyên lý phun khác nhau

Để đáp ứng các ứng dụng và nhu cầu khác nhau, các vòi phun với nhiều phương pháp phun khác nhau đã ra đời. LORRIC đã tìm kiếm sáu loại nguyên lý phun của vòi phun để cung cấp tài liệu tham khảo cho những người thực hành ứng dụng có liên quan.

Principle of hollow cone spray nozzles

When liquid flows into the chamber in the hollow cone spray nozzle, through the chamber structure, it will whirl in the nozzle like a tornado. When it flows to the spout, it will pass a curved surface which lead it to be sprayed out (thrown out) as hollow cone shape.

Principle of fan spray nozzles

After liquid flows to a nozzle from the pipe forced by pressure, when it passes by the spray orifice, it will be extruded by the orifice with an oval-shaped structure. As the pressure of the extrusion is not able to be released, the liquid flows out of the orifice to both sides which makes the spray shape is similar to a fan. That is why this kind of spray is called “Fan spray”.

Introduction of nozzle’s connector

LORRIC provides nozzles in various ways to be installed on equipment or pipes. The most common way to install nozzles is external thread (aka male thread). Besides, there are more ways, like internal thread (aka female thread), flange type, welding type, and clamp type. Among them, the welding type could be classified to 2 types, spray pipe and plate positioning.

Impact vs pressure distribution

1. Impact is total force: Which is proportional to flow rate. /Which is proportional to the square root of pressure. 2. The definition of pressure distribution is the pressure which is sprayed to every part of workpiece by nozzles.: Variation of impact will effect pressure distribution. /The result of pressure distribution will be effected by spray shape and coverage volume. /Pressure distribution is related to spray flow rate and effected by the design of flow distribution. /As there is so many variables, there is no any simple formula to receive pressure distribution of various nozzles.

3 facts you must know about “spray angle”

The definition of “Spray angle ” is the angle of spray shape. (please refer to schematic diagram) We lists following 5 easy sentences for you to quick understand what is “spray angle”

Immediately understanding how to read “Flow Rate”

Unit: LPM ( L/min ) Features: • Greater the pressure, greater the flow rate. • Flow rate and pressure are not linear relationship. • For example, the flow rate of a nozzle under 8kg/cm2 pressure is not double when it is under 4kg/cm2 pressure.
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