high quality stainless rotary damper - LF-33

1. soft closing, can support 4kgs

2. more than 30000 cycles

3. pass TUV test, ISO9001/14001

4. stainless steel, high class

We owe 15 yeas experiences in silicone oil rotary damper, and we always control the quality from the very original material.

LF-33, ROTARY DAMPER, OPERATION ANGLE 110°, CLOCKWISE OR COUNTER CLOCKWISE, STAINLESS STEEL, 8-30 KGF.CM \BLK

1/ Design Torque:

3700-3800 damper 1.6 N.m.

1400-1700 damper 2.6 N.m.

2/ Damper units not to contain: Cadmium, Mercury, Lead, Chromium VI, PBB, PBDE (RoHS banned substances)

3/ Closing Time Test

• 
  Testing to be performed in conditions 20 +/-2
  degrees C and 65 +/- 5 % Relative Humidity. Damper to be stored in this
  environment a minimum of 2 hours before testing.
• 
  Set up torque arm to apply the design torque to
  the damper (as per above)
• 
  Position 1: Measure the closing time from a
  position of 70 degrees to 0 degrees (where 0 degrees is the closed position). The
  closing time should be in the range of 6 to 12 sec.
• 
  Position 2: Measure the closing time from a
  position 15 degrees to 0 degrees (where 0 degrees is the closed position). The
  closing time should be 0.4 sec or more.
• 
  Repeat the closing time test for both positions on
  30 dampers and record the results.

4/ High Temperature test –

• 
  Expose damper to an atmosphere of 50+/-5 degrees
  C for 96 hours. Remove damper and store at 20 +/-2 degrees C and 65 +/- 5 %
  Relative Humidity for 1 hour.
• 
  Perform closing time test at design torque for that model damper
• 
  Damper shall pass closing time test

5/ Low Temperature test –

• 
  Expose damper to an atmosphere of -10+/-5
  degrees C for 96 hours. Remove damper and store at 20+/-2 degrees C and 65 +/-
  5 % Relative Humidity for 1 hour.
• 
  Perform closing time test at design torque for that model damper
• 
  Damper shall pass closing time test.

6/ Humidity Test-

• 
  Expose damper to an atmosphere of 90+/-5 % RH
  for 96 hours. Remove damper and store at 20 +/-2 degrees C and 65 +/- 5 %
  Relative Humidity for 1 hour.
• 
  Perform closing time test at design torque for that model damper
• 
  Damper shall pass closing time test.

7/ Thermal Shock Test

• 
  Expose damper to 5 thermal shock cycles as
  follows: -10 degrees C for 7.5 hrs, 20 degrees C for 0.5 hrs, 50 degrees C for
  15.5 hrs (24h/ cycle)
• 
  Remove damper and store at 20 +/-2 degrees C and
  65 +/- 5 % Relative Humidity for 1 hour.
• 
  Perform closing time test at design torque for that model damper
• 
  Damper shall pass closing time test.

8/ Life Cycle Test

• 
  Damper units to be assembled with toilet seat
  and tested on open /close cycle tester. Machine lifts ring and cover to above
  70 degrees and allows ring and cover to fall to fall to 0 degrees before
  starting the next cycle.
• Lid and cover to pass 50,000 cycles without
  damage or breaking of dampers. If slow close time falls below 2 sec (for ring
  or cover) before 50,000 cycles are complete this is considered a failure.