TVD.
Plugs
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Polypropylene-based (PP) technopolymer.
- Cover: red colour (TVD-EPDM), green (TVD-FKM).
Graphic symbol "valve" tampoprinted in black colour.
Avoid contact with solvents, alcohol or detergents containing alcohol to preserve tampoprinted graphic symbol.
On request, the cover can be also supplied in black colour, with graphic symbol valve tampoprinted in other colour.
- Threaded connector: black colour.
Standard executions
- TVD-FKM: flat packing ring and FKM membrane gasket, hardness 70 Shore A.
- TVD-EPDM: flat packing ring and EPDM membrane gasket, hardness 70 Shore A.
Maximum continuous working temperature
50°C.
TVD. breather caps with vacuum breaker valve are suitable for reservoirs and tanks for liquid transport.
The membrane retaining system allows a quick emptying out of the reservoir by letting in big quantities of air through the cap. Thus avoiding the vacuum inside the reservoir, slowing down the liquid exit.
The pre-set pressure of the membrane gasket stops any liquid loss when the reservoir is shaken (for example during transportation).
The liquid pressure on the gasket guarantees a perfect seal of the cap, for example in case of overturning of the reservoir.
Resistance to chemical agents
Tests carried out under standard laboratory conditions at 23°C. Values to be considered only as guidelines.
Please contact ELESA Technical Department for further chemical resistance details to particular liquids not reported in the table.
| Depression | Load capacity | |
| FKM | EPDM | |
| 50 mb | 360 l/min | 370 l/min |
| 40 mb | 320 l/min | 330 l/min |
| 30 mb | 260 l/min | 280 l/min |
| 20 mb | 210 l/min | 230 l/min |
| 10 mb | 140 l/min | 160 l/min |
| 5 mb | 110 l/min | 130 l/min |