DBB

DOUBLE BLOCK AND BLEED valve
- Nova Milanese (MB) -

Double Block and Bleed ball valves are valves with double ball, floating or trunnion, full passage or reduced passage, bidirectional. Also in the same category are SBB valves, namely Single Block and Bleed, floating ball valves, full passage or reduced passage, and bidirectional.

Double block and bleed

STANDARD EXECUTION

Valve double block and bleed, double ball, screwing or trunnion, full or reduced passage, bidirectional. Design according to EN 12516, ISO 17292, PED 2014/68/EU, ASME B16.34, API 6D.
RF or RTJ flanging in accordance with EN 1092-1 or ANSI B16.5. Manufacturer standard gauges.
Fire Safe in accordance with API 6FA, API 607 and ISO 10497. ATEX ZONE II 2GD (Directive 2014/34/EU).
SIL 3 in accordance with IEC 61508.
TA-LUFT / Fugitive Emission ISO 15848.
Top Mounting in accordance with ISO 5211, anti-ejection stem, anti-static device in accordance with BS 5146. Hydraulic and pneumatic testing in accordance with EN 12266-1, ISO 5208, API 598, API 6D.
Sealing class in accordance with ISO 5208: grade A soic seals, grade D metal seals. Surface finish for carbon steel standard paint manufacturer.
MATERIAL OF THE MAIN COMPONENTS

Body and lock: carbon and stainless steel from bar up to DN 100 (4"), forged DN higher. Trim from bar: AISI 316/316L stainless steel.
Seats: PTFE or RPTFE (25% carbographite). Body and rod seals: VITON O-ring and graphite. Galvanized carbon steel lever.
Recommended temperatures: TS -29°C to +150°C.
OPTIONAL

Body and Trim: nickel alloys, duplex, SSD, Titanium, other materials on request. Temperatures: suitable materials and seals down to -101°C or +500°C. Gauge and passages on request.
NACE MR0175 - MR0103.
Tie rods and nuts in various materials and special coatings. ENP coating for trim.
Seats: TFM, PTFE NXT®, PEEK, KEL-F, Metallic with TCC or CCC coating.
Body and stem seals: elastomers, perfuoroelastomers, PTFE, "V" pack, Lip Seal, Spiral Wound. Stem extension for insulation 100 mm.
Extension for high and low temperatures, Live Loading System, double seal, bleed plug. Stainless lever, Gear operator, padlocking device.
Automation: pneumatic or electric actuators, limit switches, solenoid valves. Special coatings.

REQUEST INFORMATION

single block and bleed

STANDARD EXECUTION

Single block and bleed valve, screwing, full or reduced passage, bidirectional. Design according to EN 12516, ISO 17292, PED 2014/68/EU, ASME B16.34, API 6D. RF or RTJ flanging in accordance with EN 1092-1 or ANSI B16.5.
Manufacturer standard gauges.
Fire Safe in accordance with API 6FA, API 607 and ISO 10497. ATEX ZONE II 2GD (Directive 2014/34/EU).
SIL 3 in accordance with IEC 61508.
TA-LUFT / Fugitive Emission ISO 15848.
Top Mounting in accordance with ISO 5211, anti-ejection stem, anti-static device in accordance with BS 5146. Hydraulic and pneumatic testing in accordance with EN 12266-1, ISO 5208, API 598, API 6D.
Sealing class grade A in accordance with ISO 5208.
Surface finish for carbon steel standard paint manufacturer.
MATERIAL OF THE MAIN COMPONENTS

Body and lock: carbon and stainless steel from bar. Trim from bar: AISI 316/316L stainless steel.
Seats: PTFE or RPTFE (25% carbographite). Body and rod seals: VITON O-ring and graphite. Galvanized carbon steel lever.
Recommended temperatures: TS -29°C to +150°C.
OPTIONAL

Body and Trim: nickel alloys, duplex, SSD, Titanium, other materials on request. Temperatures: suitable materials and seals down to -46°C or +200°C.
NACE MR0175 - MR0103.
Tie rods and nuts in various materials and special coatings. ENP coating for trims.
Seats: TFM, PTFE NXT®.
Body and stem seals: elastomers, perfuoroelastomers, PTFE. Stem extension for insulation 100 mm.
Unidirectional valve with balance hole on the ball. Stainless lever, padlocking device.
Automation: pneumatic or electric actuators, limit switches, solenoid valves. Special coatings.