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PRESSURE RELIEF VALVE WITH PIPE AWAY

MOD. 121 and related variants (121 A, 121 TV, ...)
These valves are designed to protect the reservoirs against overpressures and when the vapours need to be collected in an exhaust line. As the reservoir pressure exceeds the valve setting, the pallet arises allowing the vapour discharging
Drawing

flow rate curve

DN 2"
DN 3"
DN 4"
DN 6"
DN 8"
DN 10"
DN 12"
VALVES MOD. 121 A
Spring loaded valves, used when the set pressure is higher than +100 mbar g

VALVES MOD. 121 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. 121 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.

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)

GUIDES
AISI 304L, AISI 316L
Anti-corrosion materials (PTFE, Alloy C276)

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