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TRIPLE SEAL ANTI-BLOW-OUT STEM |
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TOPAZ ball valve is bottom loaded stem designed |
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to prevent blow-out, with a triple sealing:
in the upper part one stem packing in PTFE
and one ORing in fluoroelastomer and
a thrust washer in PTFE in the lower part. |
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The patented and automatic system guarantees |
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a perfect tight seal in any working condition, thanks to the two spring washers that maintain
a constantpressure on the seats, and that,
by taking up slackenings, exclude any need
for maintenance. |
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