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
