If evaporator pressure exceeds safe limit

If there is continuous rain outside

If condenser pressure exceeds safe limit

If there is continuous air velocity

0.8 kg/ cm²

0.4 kg/ cm²

0.2 kg/ cm²

0.1 kg/ cm²

10 p.s.i.a

20 p.s.i.a

30 p.s.i.a

40 p.s.i.a

1/4" - 13 ACME

1/2" - 16 ACME

3/8" - 15 ACME

5/16" - 14 ACME

Increases quantity of refrigerant charge

Decreases quantity of refrigerant charge

Avoids cross contamination of refrigerants

Improves performance of car air conditioners