The RD coupling is a rubber attachment that connects the large and small reservoir with a piping system.

Function

Low drainage and piping system to avoid leakage and flooding

RD couplings are fitted into the gap between the tank and the pipe.

Durability of RD couplings

Although the RD couplings are made entirely of natural rubber, the joints still have the following limitations:

Rubber degradation due to prolonged sun exposure
Oxidized by heat and steam from generators
Gases such as SOx, NOx, HCl, etc. also cause rubber to get corroded

Material Standard

Ozone test
JIS K 6259 Test Method
Ozone Test Method The electrolyte constant method
Concentrations = 50 ± 5 pphm
Temperature = 40 ± 2 ° C
Elongation = 20% static
Time = 24 hours
Standard value No Criss

Design