Quarter-turn carbon steel ball valves with female threaded ends, in full bore and reduced ("half") bore. For on/off isolation on water, oil and compressed air lines where a corrosion-resistant body is not required.
Prices on request. Contact us for availability and quotations.
A ball valve shuts off by turning a bored ball through 90°. MSS SP-110, the standard practice covering threaded, socket-welding, solder-joint, grooved and flared-end metal ball valves in NPS 1/4 to 4, covers carbon steel among its body materials and states that valves of this class are intended for on-off operation, with throttling service only where the manufacturer recommends it.
The two-piece valve in the photograph carries "1000 WOG" cast into the body. WOG is the older trade marking for the cold working pressure in water and oil service at ambient temperature under non-shock conditions: 1000 WOG is 1000 psi, about 69 bar. It is not a steam rating and it does not apply at elevated temperature. Confirm the marking on the size actually being ordered, since the rating of this class of valve commonly falls in the larger sizes.
Full bore and reduced ("half") bore are both offered. The full bore valve passes the full pipe area; the reduced bore valve uses a smaller ball behind the same end connection, which is cheaper and lighter but adds pressure drop. ISO 17292:2015 names the three bore classes as full bore, reduced bore and double reduced bore, and covers threaded and socket-welding end valves in DN 8 to DN 50 (NPS 1/4 to 2).
Carbon steel bodies are for non-corrosive duty; they are not a substitute for stainless steel on chemical, potable water or marine service. State on order the nominal size, the thread form (ISO 7-1 or ASME B1.20.1 NPT — ISO 17292:2015 permits either, and they are not interchangeable), full or reduced bore, the seat material and the required pressure designation.
| Valve Type | Quarter-turn ball valve for on-off isolation; MSS SP-110 restricts throttling service to where the manufacturer recommends it |
|---|---|
| Body Material | Carbon steel — the cast or forged grade is not marked on the item and must be confirmed at order. MSS SP-110 lists carbon steel among the body materials it covers |
| Body Construction | Two-piece screwed body and one-piece body — both are shown |
| Pressure Marking | "1000 WOG" cast on the body of the two-piece valve shown — 1000 psi (about 69 bar) cold working pressure in water and oil service, non-shock, at ambient temperature. Not a steam rating; confirm the marking on the size ordered |
| Bore | ISO 17292:2015 designates three bore classes — full bore, reduced bore and double reduced bore. Full bore and reduced ("half") bore are the patterns this listing offers; which pattern is held in a given size must be confirmed |
| End Connections | Female pipe thread. ISO 17292:2015 permits threads to either ISO 7-1 or ASME B1.20.1 (NPT); specify which — they are not interchangeable |
| Size Range | DN 8 - DN 50 (NPS 1/4 - 2) is the range ISO 17292:2015 covers for threaded and socket-welding ends; MSS SP-110 covers NPS 1/4 - 4. Sizes actually held must be confirmed |
| Pressure/Temperature Rating Basis | The lesser of the shell rating and the seat rating. Shell rating per ASME B16.34 for Class-designated valves, or EN 12516-1 for PN-designated valves |
| Seat Material | Soft seat. ISO 17292:2015 sets minimum seat pressure/temperature ratings for PTFE, modified PTFE, reinforced PTFE and reinforced modified PTFE; the grade fitted must be confirmed at order |
| Testing | Shell and closure-tightness pressure testing to ISO 5208, as modified by ISO 17292; marking to ISO 5209 |
