Koehler K18296 Digital Water Spray Apparatus
The Digital Water Spray Apparatus evaluates the ability of a lubricating grease to adhere to a metal surface when subjected to a direct water spray under controlled conditions.
Product Overview
The Koehler Water Spray Apparatus meets ASTM D4049 specifications. The system includes the spray chamber, delivery system and constant temperature reservoir. The instrument sprays water at the specified rate and temperature on a test panel coated with sample grease.
Features & Benefits
Conforms to the specifications of: ASTM D4049
Drive Motor: 1⁄3hp, 1725rpm
Pump: rotary gear positive displacement type
Pressure Gauge: 0-60psi
Temperature Control Stability: ±0.5°C
Key applications of Koehler K18296 Digital Water Spray Apparatus
Conforms to the specifications of: ASTM D4049
Drive Motor: 1⁄3hp, 1725rpm
Pump: rotary gear positive displacement type
Pressure Gauge: 0-60psi
Temperature Control Stability: ±0.5°C
K182XX - Water Spray Apparatus (Operational Video) [English]
About the Koehler K18296 Digital Water Spray Apparatus
This complete Water Spray Apparatus meets ASTM D4049 specifications. Water is sprayed at the specified rate and temperature onto a test panel which has been coated with sample grease and weighed.
To test for water spray resistance, fill the reservoir with tap water and set to the required test temperature. The water is circulated through the system to attain temperature equilibrium. Once the correct temperature has been reached the coated test panel can be inserted in the spray chamber. Adjust the water spray to 40psi (276kPa) and continue for 5 minutes.
A hinged acrylic spray chamber cover is recessed into the chamber housing to ensure watertight operation and two thermometer wells allow for separate monitoring of reservoir and water spray temperatures.
The instrument includes
• Stainless Steel Test Panel
• Grease Application Fixture
1. Control Panel – Main point of operation. Contains line switch, temperature control, motor switch and power indicator light.
2. Safety Latch – Cuts power to the water spray when reservoir tank cover is lifted.
3. Reservoir Tank Cover – Contains water spray in test area of the apparatus.
4. Spray Nozzle – Propels water at prescribed angle to grease test panel
5. Pressure Gauge – Indicates water pressure at point of application
6. Pressure Regulation Valve – To control pressure of water to spray nozzle. Pressure is displayed on pressure gauge
7. Pump Out Valve – Features a flow valve that indicates fluid direction. When the arrow is facing out towards the valve nozzle the fluid will exit the system. When facing inwards, towards the system tubing, the water will flow back to the pump. This valve is used to purge the system.
8. Thermometer Port – For insertion of the bath thermometer at the proper angle as to not interfere with water spray.
The Koehler K18296 evaluates the water spray resistance of lubricating
greases under controlled test conditions.
Product FAQ's
The Koehler K18296 Digital Water Spray Apparatus is used to evaluate the resistance of lubricating greases to water spray-off. It determines how much grease is removed from a surface when subjected to a controlled water spray, helping assess its suitability for wet or washdown environments.
The apparatus applies a measured amount of grease onto a test plate, which is then exposed to a controlled spray of water at a specified temperature and pressure. After the test period, the amount of grease remaining on the plate is measured to calculate the percentage that was washed off.
Water spray-off resistance is important because greases used in environments exposed to water—such as marine, food processing, or outdoor machinery—must remain in place to provide proper lubrication and protection. Poor resistance can lead to lubricant loss, increased wear, and equipment failure.
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