Posts Tagged ‘Ballvalve’

Double Ball/Plug DB&B valves With the need for verifiable and maintainable shut off in safety critical applications, double block and bleed valves have commonly been used for primary and secondary tight shut off, in an attempt to provide and ensure system integrity. Historically, system integrity would be achieved through the use of two individual isolation […]

Australian Pipeline Valve’s floating firesafe SLFSBV01 ball valve design has been further improved over the last 10 years. Features: – Heavy wall to API608 and ANSI B16 with high tensile heavy bolts (not Taiwan/ China style with hardware store bolts). Heavy T-Bar pole lever (100NB and above). Superior TFM1600 PTFE seats. (TFM1600 is a modified […]

Be careful with trunnion mounted ball valves 100mm (4”) and under and in reduced bore 150mm (6”) and under as many manufacturers cannot put a sealant injection directly onto each seat such as in the photo shown above (RHS). They can only fit a sealant injection to the middle of the body (photo LHS). Consequently […]

Many manufacturers and operators in the oil and gas industry have leakage problems with elastomer seals, especially when a drop in pressure takes place. This primarily occurs in sealings which create a barrier against gaseous media if highly pressurised gas falls to a very low pressure level within a very short period of time. The […]

Even if you’re ordering from a quality valve manufacturer, they often sub contract out special painting of the valves. Typical problems involve not taping up the stem area or indeed the bore area properly or the tape falling off. Sandblasting residue can ingress into the stem area or into the seat area. Initially this may […]

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