BOLTED BODY TRUNNION BALL VALVES
High-performance valves engineered for the oil & gas, chemical, petrochemical, water, and energy industries
Negri Fratelli bolted body trunnion-mounted ball valves are designed to deliver maximum safety, reliability, and long-term ease of maintenance. The bolted body design provides direct access to internal components, simplifying inspections, scheduled maintenance, and seat or seal replacement without compromising the valve’s structural integrity.
Ideal for a wide range of applications, including industrial plants, gas and fluid distribution networks, pipelines and refineries, water treatment systems, and energy projects.
- Bolted body
- Full or reduced bore options
- Bi-directional sealing with Double Block & Bleed (DBB) design
- Solid ball with a cylindrical bore and no internal cavities
- Single-piston seats with self-relieving effect
- Anti-ejection stem with antistatic device
- Multiple actuation options – manual lever or gearbox (with handwheel or 90° deviation), or actuator-operated
- Testing – hydrostatic and pneumatic tests to API 6D, EN 13774, EN 14141. Other testing upon request
- Firesafe certified design – API 607 and ISO 10497 compliant
- Double piston effect seats, DIB-1 / DIB-2 seats, Primary Metal Secondary Soft (PMSS) or metal-to-metalsealing
- Stem and seat sealant injection systems
- Drain and vent devices, complete with ball valve and/or plug, for DBB testing and maintenance
- Versions for cryogenic or high-temperature service
- Locking devices
- Customized face-to-face dimensions
- Design standards: API 6D, ASME B16.34, ASME VIII DIV. 1 / 2, NACE MR0175, EN 13774, EN 14141, EN ISO 14313, EN 13942, EN ISO 17292
- Pressure rating: ASME 150 to ASME 2500, PN 6 to PN 420
- Temperature range: –29°C to +160°C (other ranges on request)
- Size range: up to DN 900 (36”)
- End connections: flanged, butt-welding, hub
- Body and closures: in carbon and stainless steel, obtained from forging or bar stock
- Ball and seat rings: ASTM A350 Gr. LF2, ASTM A479 S31600, ASTM A182 F316 (other materials on request)
- Seat inserts: soft (delta ring in FKM, HNBR, or thermoplastic polymers such as RPTFE, Devlon, Peek, or PCTFE) or metal (Tungsten/Chrome Carbide coating), other materials on request
- Seals: FKM, HNBR, FFKM, EPDM, graphite, lip seals, and special high-temperature graphite seals (other materials and solutions available on request)
- Design & Construction: API 6D
- Firesafe: API 607, EN ISO 10497
- Pressure Equipment Directive (PED): 2014/68/EU
- ATEX certification: 2014/34/EU