Bubble Tight Shut Off Ball Valve
Bubble-tight Shutt Off Ball valve, no bubbles should be observed in a prescribed time span during air pressure testing of a new valve in the closed position.
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Key Specifications / Features
Bubble tight shut off, a phrase describing the sealing ability of a valve. During air pressure testing of a new valve in the closed position, leakage past the seats is collected and bubbled through water. To qualify as bubble-tight, no bubbles should be observed in a prescribed time.
Relia ball valve meet the bubble tight shutt off Class, no visible leakage are detected for hydro test and air test according to API 6D and API 598 for both soft seat and metal seated ball valves.
How to make the ball valve meeting bubble tight shutt off? All the ball valves are designed by rich experience engineer, repsect to the ball valve working condition, client request, material selection and machining art. The metal seated ball and seat are coated with stellite, hard Cr or tungsten carbide and lapped as mirror in result.