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BUNDESMANN WATER REPELLENCY TESTER
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The “ASIAN” Bundesmann Apparatus consists of a steel structure with specimens is rotated at a specified speed in this tank about a vertical axis with the help on an Electric motor and worm reduction gearbox placed underneath the tank. Impinging of water jets coming from nuzzles on 304 Screws fitted on an aluminum plate produces the shower. The nozzles are fitted on aluminum blocks, which are in turn connected to a closed piping system. Water is supplied to piping system through an electric pump. A control valve And a pressure gauge are also provided to regulate and indicate pressure in the pipeline. A guard is provided to contain splash produced. Water not impinging on the screws is also collected in this tray and drained away. This shower arrangement is mounted on the top of the structure to give the specified drop height. A hinged tray which can be swung during the testing is also provided to shield the assembly from shower before and after the test. An arrangement to collect water circulation tank and re-circulate it with the help of the pump is also provided.
The cup assembly consists of four aluminum cups with their axis tilted outward at 10º to 15º to the vertical mounted on an aluminum base. Specimen holding ring made of aluminum hold the specimen on-to the cups with the help have screwed clamps. Each cup four-wiper blades set perpendicular to each other in the form of a cross. The wiper blades are made of stainless steel and are tapered down away from the center. The abrading face of each blade is cylindrical in shape. The wiper assembly presses against the lower surface of the test specimen with the help of a spring. Arrangement is also made to make the wiper blade assembly oscillate through an angle of 100º four times in every one revolution of the cup assembly. Gunmetal drain fitted to each cup for draining out the water collected in them. The cup assembly can be easily taken out to facilitate mounting of specimens and draining of water collected in the cups for determination of amount of water that has penetrated through the specimens. Specimens loading disk is also provided with the equipment to depress wipers to rim level while mounting the specimen.
TECHNICAL DATA
Diameter of test specimen : 140 mm
Diameter of test opening : 100mm
Rate of collection of water in each cup : 65+ 3ml/minute
Distance between nozzle tip and specimen centre : 150 cm
Speed of rotation of cup assembly : 5rpm
Distance between center of specimen and vertical
Axis of rotation of cup assembly : 105 +10 mm
Thickness of wiper blades : 5.08 to 5.13mm
Radius of contact edges of wipers : 6.35mm
Load exerted on specimen by wipers : 400 +50mg
RELATED STANDARD
ISO: 9865, DIN EN 29865, BS EN 29865
PARAMETERS TABLE
S. NO. |
PARAMETERS |
ASIAN |
1. |
Diameter of test specimen |
140 mm |
2. |
Number of specimen holders |
4 |
3. |
Diameter of test opening |
100 mm |
4. |
Rate of collection of water in each cup |
65+ 3ml/minute (adjustable) |
5. |
Distance between nozzle tip and specimen cent |
150 cm |
6. |
Speed of rotation of cup assembly |
5rpm±1 rpm |
7. |
Distance between center of specimen and vertical |
105 +10 mm |
8. |
Thickness of wiper blades |
5.08 to 5.13mm |
9. |
Radius of contact edges of wipers |
6.35 mm |
10. |
Load exerted on specimen by wipers |
400 +50 mg |
11. |
Net Weight |
200 kg (approx.) |
12. |
Gross Weight |
310 kg (approx.) |
13. |
Dimension with packing (Inch) |
43 × 34 × 99 |
14. |
Volume Weight & Chargeable Weight |
400 kg (approx.) |
15. |
Shape |
With viewing window can be closed and open at the time of testing |
16. |
Related Standards |
ISO 9865 |