Gate Seal Design Guidelines H3
HYDRAULIC GATE SEALS: DESIGN GUIDELINES
The rubber seal compound shall be one
of the following: natural rubber/poly-
isoprene or neoprene. The compound shall have no reclaimed polymers and include
reinforcing carbon black, zinc oxide, accelerators, antioxidants, vulcanizing
agents
and plasticizers. The rubber seal profile shall be properly cured into a homogeneous
form and kept free of oils, grease, or other materials which would deteriorate
the
rubber. Physical characterisics of the seals shall meet the following minimum
requirements:
COMPOUND OPTIONS:
SU13366 - Natural Rubber/Polyisoprene
|
TEST METHOD |
|
| DUROMETER HARDNESS (SHORE A) |
60 - 70 | ASTM D2240 |
| TENSILE STRENGTH | 3000 PSI (MIN) | ASTM D412 |
| ELONGATION AT BREAK | 450%(MIN) | ASTM D412 |
| 300% MODULUS | 900 PSI (MIN) | ASTM D412 |
| COMPRESSION SET | 30% (MAX) | ASTM D395 METHOD B |
| WATER ABSORPTION | 5% BY WEIGHT (MAX) | ASTM D 471 |
|
AGED THEN IMMERSED AT 70 C FOR 166 HRS - NATURAL
RUBBER AND BLENDS |
||
| AGING : TENSILE STRENGTH (48 HRS OF AGING) |
80% OF STRENGTH(MIN) |
ASTM D 572 |
| LOW TEMPERATURE BRITTLENESS |
NON BRITTLE 3' @ -40 C |
ASTM D 2137 METHOD A |