Spray nozzle

A spray nozzle comprising:

• (a) an annular head, the annular head comprising:
• (i) a liquid inlet orifice;
• (ii) a first external flow diversion surface and a second external flow diversion surface;
• (iii) an interior circumferential channel;
• and
• (iv) an ejector;
• (b) a hollow neck;
• and
• (c) a liquid inlet line disposed in the hollow neck and in fluid communication with the liquid inlet orifice;
• wherein
• both the first and second external flow diversion surfaces are disposed along the entire circumference of the annular head and each external flow diversion surface comprises a conical frustum shape symmetrical to the other;
• the interior circumferential channel is disposed between the first and second external flow diversion surfaces and extends from the liquid inlet orifice to the ejector, the interior circumferential channel comprising a first interior wall, a second interior wall opposite the first interior wall, and a bottom interior wall, a circumferential channel width, and a continuously reducing depth from the liquid inlet orifice to the ejector;
• and
• the ejector is disposed above the liquid inlet orifice and comprises a substantially smooth surface having a curved shape and a fixed width the same as or substantially the same as the circumferential channel width, the ejector extending from the point of contact with the interior circumferential channel such that in the extending direction the substantially smooth surface increases in distance from the interior circumferential channel.