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BREATHER VALVE

MOD. 101 and related variants (101 AA, 101 AC, ...)
These valves are designed to protect the reservoirs against excessive positive or negative (vacuum) pressures due to the loading or unloading operations and to the temperature variations. As the reservoir pressure exceeds the valve relief or vacuum setting, the pallets arise allowing the venting or the vacuum relieving of the reservoir.
Drawing

flow rate curve

DN 2"
DN 3"
DN 4"
DN 6"
DN 8"
DN 10"
DN 12"
VALVES MOD. 101 AA
Spring loaded valves, used when the set pressure is higher than +100 mbar g and lower than -100 mbar g

VALVES MOD. 101 AC
Valves with a suction elbow, used on blanketed tanks. An inert gas (e.g. nitrogen) can be fed into the reservoir when its pressure value falls below the blanketing pressure

VALVES MOD. 101 TV
Valves with o-ring sealing available in various elastomeric materials (NBR, EPDM, FKM, FEPM, FFKM), to increase the tightness and minimize the leakages

VALVES MOD. 101 C
Valves with jacket in AISI 316L, featuring a double wall welded externally to the valve body and structured to create a cavity for the circulation of heating or cooling media. They are used to maintain the internal chamber of the valve at a specified temperature.

MAIN FEATURES

Replaceable seats

ANTIFREEZING PALLETS
The pallet drip avoids condensate collecting around the seat.

PALLET GUIDES LOCATED ABOVE THE SEAT
This arrangement assures a no-jamming guide of the pallet not affected by contaminant fluids, therefore a close coupling between pallet and guides is not necessary.

BIRD SCREENS
Bird screens avoid the entering of foreign elements.

SETTING
Through the pallet's dead weights, any setting is available between ± 2,5 mbar g and ± 100 mbar g. Higher settings can be achieved with a spring configuration.

MATERIALS

BODY
Cast Aluminium, Carbon Steel (WCB)
Stainless steel (CF8 -AISI 304, CF8M - AISI 316, CF3 -AISI 304L, CF3M - AISI 316L)
Special materials available upon request (CD3MN - DUPLEX, CE3MN - SUPERDUPLEX, CW12MW - ALLOY C276)

SEATS AND PALLETS
AISI 304L, AISI 316L, PTFE
Anti-corrosion materials (PTFE, Alloy C276)

BIRDS SCREEN AND GUIDE
AISI 304L, AISI 316L
Anti-corrosion materials (PTFE, Alloy C276)

WEATHERHOOD
AISI 304L

DIAPHRAGM
PTFE, FEP, NBR, FKM, EPDM

FLANGE

Drilled acc. to EN 1092-1 PN10/16, ASME B16.5 Class 150 RF
Special flanges upon request