Maria Valve
1 / 5
The fixed ball valve is designed with asymmetrical left and right halves along a section perpendicular to the axis of the valve channel. It is primarily utilized for cutting off, distributing, and changing the flow direction of medium within pipelines. Its specialized pivot structure ensures high-precision ball positioning. The standard valve seat incorporates a spring structure to maintain optimal low-pressure sealing performance. These valves are highly suitable for chemical, petroleum, natural gas, and metallurgy industries, especially in pipelines containing hydrogen sulfide or serious corrosive impurities.
| Test Pressure (Mpa) | Nominal Pressure (Mpa) | Pressure Class (Class) | JIS (MPa) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Strength Test | 2.4 | 3.8 | 6.0 | 9.6 | 15.0 | 3.1 | 7.8 | 10.2 | 15.3 | 23.1 | 2.4 | 3.8 |
| Sealing Test | 1.8 | 2.8 | 4.4 | 7.0 | 11.0 | 2.2 | 5.6 | 7.5 | 11.2 | 16.8 | 1.5 | 2.8 |
| Airtight Test | 0.5-0.7 MPa | |||||||||||
| Temperature | PTFE ≤150ºC | PPL ≤300ºC | Carbon fiber ≤350ºC | |||||||||||
| Part Name | C (Carbon Steel) | P (Stainless Steel) | R (Moly Steel) |
|---|---|---|---|
| Body / Bonnet | WCB | ZG1Cr18Ni9Ti(CF8) | ZG1Cr18Ni12Mo2Ti(CF8M) |
| Sphere | 2Cr13 | ZG1Cr18Ni9Ti(CF8) | ZG1Cr18Ni12Mo2Ti(CF8M) |
| Stem | 2Cr13 | 1Cr18Ni9Ti(304) | 1Cr18Ni12Mo2Ti(316) |
| Sealing Surface | PTFE, Carbon Fiber + PTFE, Para-polystyrene | ||
| Filler | V-shaped PTFE, Flexible Graphite | ||
