Quarter-turn stainless steel ball valves with female threaded ends, supplied in full bore and reduced ("half") bore patterns. Used for on/off isolation on water, oil, compressed air and chemical service in process and utility piping.
Prices on request. Contact us for availability and quotations.
A ball valve isolates by turning a bored ball through 90°: with the bore in line with the pipe the valve is open, and across the pipe it is closed. MSS SP-110 states that ball valves of this class are intended for on-off operation and should be used for modulating or throttling service only where the manufacturer recommends it.
Two bore patterns are held. A full bore valve has a ball bore matching the nominal pipe bore, so there is no step in the flow path and the line can be pigged or rodded; a reduced bore valve — sold in this trade as "half bore" — uses a smaller ball and body behind the same end connection, which lowers cost and weight at the price of extra pressure drop. ISO 17292:2015 designates the three bore classes as full bore, reduced bore and double reduced bore.
Threaded and socket-welding end ball valves are covered by ISO 17292:2015 in sizes DN 8 to DN 50 (NPS 1/4 to 2) and by MSS SP-110 in NPS 1/4 to 4. ISO 17292:2015 permits threads to either ISO 7-1 or ASME B1.20.1 (NPT); the two forms are not interchangeable, and an NPT male started into an ISO 7-1 tapered female will jam before it seals because the flank angles and pitches differ.
State on order the nominal size, the thread form, full or reduced bore, the stainless grade required, the seat material and the pressure designation. Under ISO 17292:2015 the valve rating is the lesser of the shell rating and the seat rating, so on a soft-seated valve it is normally the seat, not the body, that sets the temperature and pressure limit.
| Valve Type | Quarter-turn ball valve for on-off isolation; MSS SP-110 restricts throttling service to where the manufacturer recommends it |
|---|---|
| Body Material | Stainless steel — the cast or forged grade is not marked on the item and must be confirmed at order |
| Body Construction | Two-piece screwed body and one-piece body — both are shown |
| 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 Designation | Class 150, 300, 600 or 800, or PN 16, 25, 40, 63 or 100 — Class 800 applies only to valves with threaded and socket-welding ends |
| 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 |
