SLV
Butt-Welded 3-Piece Ball Valve
The SLV Butt-Welded 3-Piece Ball Valve is welded directly into the pipeline, eliminating flanged and threaded joints as potential leak paths. Its three-piece construction lets the centre section swing out for service while the welded end caps stay in the line.
Product Benefits
- Highest-integrity connection: Once welded, there are no gasketed or threaded joints at the valve to loosen, weep or need retorquing.
- Built for demanding duty: That makes the valve attractive wherever fugitive emissions, hazardous media or simple long-term leak-tightness are the priority.
- Permanent yet serviceable: The end caps are welded once, and thereafter the body bolts can be released to swing out the centre for seat and seal replacement without cutting the pipe.
- Standards-based construction: The design, wall thickness and testing follow recognized international valve standards.
Where It's Used
- High-integrity process piping: It suits small and mid-size bores in chemical and hydrocarbon service, thermal-oil and heat-transfer loops, and gas lines.
- Welded systems: It fits duties where a welded system is specified to minimize leak points.
- Stress-relieved or insulated lines: It is also a natural choice in piping where flanged joints would be awkward.
- Generous pressure rating: The cold-working pressure rating covers most utility and process duties in its size class.
Good to Know
- Material options: Bodies and balls come in stainless steel grades, carbon steel and duplex stainless, with PTFE-family and elastomer seals.
- Weld-end preparation: Weld ends follow the common international bevel standard, with options for different pipe schedules.
- Match the pipe material: Pairing valve and pipe material keeps welding straightforward.
- Protect the seats: During installation the soft seats must be shielded from welding heat, so good practice is to weld with the centre section removed or adequately covered.
- Simple upkeep: Once in service, maintenance is limited to periodic seat and seal renewal via the swing-out centre.
