LESA original design 
Breather check valve caps EN 774.1 prevent the build up of underpressure in fluid containers.
They are used when a container is to be emptied quickly. The elastic membrane ensures a sufficient air supply.
Besides that, the contact pressure of the membrane prevents the escape of fluid, e.g. during transport. If the container is turned upside down, the additional contact pressure from the fluid will be sufficient to keep the outlet firmly shut.
Upper part (cap)
Plastic
Technopolymer (Polypropylene PP)
Lower part (screw-in thread)
Plastic
Technopolymer (Polypropylene PP)
RoHS
| d1 | d2 Pipe thread | d3 | d4 | l1 | l2 | Air flow rate in l/min Underpressure in mbar | Seal membrane FKM | EPDM |
|---|---|---|---|---|---|---|---|---|
| 2.76 | G 1 1/4 | 1.30 | 2.70 | 0.67 | 2.32 | 50 | 360 | 370 |
| 2.76 | G 1 1/4 | 1.30 | 2.70 | 0.67 | 2.32 | 40 | 320 | 330 |
| 2.76 | G 1 1/4 | 1.30 | 2.70 | 0.67 | 2.32 | 30 | 260 | 280 |
| 2.76 | G 1 1/4 | 1.30 | 2.70 | 0.67 | 2.32 | 20 | 210 | 230 |
| 2.76 | G 1 1/4 | 1.30 | 2.70 | 0.67 | 2.32 | 10 | 140 | 160 |
| 2.76 | G 1 1/4 | 1.30 | 2.70 | 0.67 | 2.32 | 5 | 110 | 130 |
| Min | Max | Price |
|---|---|---|
| 1 | 6 | $38.65 |
| 7 | 99 | $37.25 |
| 100 | 249 | $35.14 |
| ≥ 250 | $31.63 |
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Attention Valued Customer,
Beginning June 15, 2024, we will implement a price adjustment. Some items will have a price decrease, while others will increase. The adjustment helps ensure our commitment to providing our customers with the best products and services.
We will honor current published prices through June 14, 2024.
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