Practical Guide To Hamon Cooling Tower Nozzle

Here is a clear, practical guide to Hamon cooling-tower spray nozzles—the types they use, typical specs, how to identify them, and options for replacement (OEM + aftermarket).

 ⭐ Main Hamon Cooling Tower Nozzle

Hamon uses several nozzle families across natural-draft towers (NDCT), mechanical draft towers, and retrofit projects.

Below are the most common:

1. Hamon Target Cooling Tower Nozzle (Splash/Film Fill Distribution)

Where used:

Most Hamon mechanical-draft towers and many natural draft concrete towers.

Features

* Full-cone spray

* Target plate above orifice improves droplet breakup

* Very large orifice → highly clog-resistant

* Works well with poor-quality / high-TDS water

* ABS or polypropylene body

Typical Pressure Range:

0.5–1.5 psi (0.03–0.10 bar)

— very low-pressure design.

Typical Flow Range:

8–20 gpm (1.8–4.5 m³/h) depending on diameter (¾", 1", 1¼", 1½").

2. Hamon Spiral Coolng Tower Nozzle (Older Models)

Where used:

Older Hamon and Delcorte towers; sometimes used in petrochemical retrofits.

Features

* Spiral/helix shape

* No moving parts

* Good atomization and uniform coverage

* More sensitive to solids → can clog in dirty water

* Polypropylene or glass-filled PP

Flow & pressure vary by insert size; common settings 1–3 psi.

3. Hamon Orifice + Deflector Cooling Tower Nozzle (Coal-fired NDCT towers)

Where used:

Large concrete natural draft towers.

Features

* Simple round orifice

* A fixed metal/plastic deflector plate above

* Handles very high flows (50–250+ gpm depending on ring)

* Excellent resistance to fouling because of huge opening size

Pressure: 0.5–1.0 psi

Material: PP, HDPE, or stainless depending on water chemistry.

4. Hamon Counterflow Film-Fill Cooling Tower Nozzles

Used on packaged counterflow towers (modular fiberglass towers).

Features

* Snap-in or threaded base

* Full-cone spray (110–120°)

* Designed to produce fine but stable droplets

* ABS/PP material

Typical flows: 5–12 gpm at ~1 psi.

⭐ How to Identify Your Hamon Cooling tower Nozzle

Remove one nozzle and check:

1. Connection Type

* Threaded (¾", 1", 1¼") → usually Hamon target-style

* Snap-fit barb → used on modular FRP towers

* Flanged spray ring → used on giant NDCT towers

2. Shape

* Target Nozzle: Looks like a vertical bullet-shaped body with a disc/plate above it.

* Spiral Nozzle: Spiral "corkscrew" shape.

* Orifice/Deflector: Large tube pointing up to a fixed plate.

3. Material color

* Hamon PP: white, gray, or black

* High-temp PP: grey

* Metal (rare except in power plants)

⭐ Typical Hamon Cooling Tower Nozzle Flow Rates

(Representative values — exact depends on model & size)

Nozzle Type	Pressure	Flow (gpm)	Metric (m³/h)
Target Nozzle (1")	1.0 psi	~12–16 gpm	2.7–3.6
Target Nozzle (1¼")	1.0 psi	~18–22 gpm	4.1–5.0
Spiral Nozzle	2 psi	8–15 gpm	1.8–3.4
NDCT Deflector Ring	0.7 psi	80–250 gpm	18–57

⭐ OEM vs Aftermarket Replacement Options

OEM (recommended for accuracy & coverage uniformity)

* Hamon Cooling Tower Company (Belgium HQ; Americas & APAC reps)

* Hamon Research-Cottrell (U.S.)

* Hamon Bahrain / Hamon Malaysia / Hamon India divisions

Aftermarket / Interchangeable Options

(Some global suppliers produce equivalents to Hamon target nozzles)

* China ABS/PP target nozzles (1", 1¼", 1½")

* PP spiral nozzles from industrial nozzle manufacturers

* Generic orifice + target plate assemblies for NDCT retrofits

* Spraying Systems / Hoyon / Eco-Cooling type equivalents