A reservoir breather lets air pass as the oil level changes. MASUDA lists threaded MSA and MB breathers plus MSA-C assemblies with a fill opening. Their airflow points below use 10 µm PVF media and a pressure drop of 1 kPa.
MSA threaded air breathers
Aluminum-alloy body. The series lists 10 µm PVF or stainless wire mesh as air element options.
| Model | Connection | Airflow (L/min) | Pressure loss (kPa) |
|---|---|---|---|
| MSA-60N | R1/2 | 60 | 1 |
| MSA-100N | R3/4 | 100 | 1 |
| MSA-250N | R3/4 | 250 | 1 |
| MSA-650N | R1 | 650 | 1 |
| MSA-1500N | R2 | 1500 | 1 |
MB threaded air breathers
Compact pressed construction. The series lists PVF grades of 3, 10 and 40 µm, as well as stainless wire mesh.
| Model | Connection | Airflow (L/min) | Pressure loss (kPa) |
|---|---|---|---|
| MB-02 | R1/4 | 60 | 1 |
| MB-03 | R3/8 | 100 | 1 |
| MB-06 | R3/4 | 180 | 1 |
| MB-08 | R1 | 350 | 1 |
| MB-10 | R1 1/4 | 700 | 1 |
| MB-12 | R1 1/2 | 800 | 1 |
| MB-16 | R2 | 1500 | 1 |
| MB-24 | R3 | 1900 | 1 |
MSA-C combined breather and filler
Standard and -P connection variants. The -P suffix identifies the welded-pipe connection. Check available inlet and outlet valve options for the configuration.
| Model | Connection | Airflow (L/min) | Pressure loss (kPa) |
|---|---|---|---|
| MSA-C30T | Flange | 60 | 1 |
| MSA-C50T | Flange | 100 | 1 |
| MSA-C75T | Flange | 250 | 1 |
| MSA-C75T-B | Flange | 650 | 1 |
| MSA-C30T-P | Welded pipe | 60 | 1 |
| MSA-C50T-P | Welded pipe | 100 | 1 |
| MSA-C75T-P | Welded pipe | 250 | 1 |
| MSA-C75T-B-P | Welded pipe | 650 | 1 |
Selecting by air exchange
Estimate the maximum rate at which oil enters or leaves the tank and check allowable tank pressure or vacuum. The table compares clean airflow at the stated restriction and media. Confirm the actual opening, service access and the need for valves where the reservoir is subject to motion or oil splash.