Spectacle Blind
Spectacle Blind
(OP)
Spectacle blind are used for easy change-over when physical isolation of pipe is needed.
But I always have a question in mind, how can we remove the old gasket as well as adding a new gasket within the limited working space?

Many thanks!
But I always have a question in mind, how can we remove the old gasket as well as adding a new gasket within the limited working space?

Many thanks!





RE: Spectacle Blind
So I'd have to assert that the change-over is easy only from the perspective of the guy who doesn't have a wrench in his hand.
Mike Halloran
Pembroke Pines, FL, USA
RE: Spectacle Blind
MikeHalloran - good one!
RE: Spectacle Blind
David Simpson, PE
MuleShoe Engineering
"Belief" is the acceptance of an hypotheses in the absence of data.
"Prejudice" is having an opinion not supported by the preponderance of the data.
"Knowledge" is only found through the accumulation and analysis of data.
RE: Spectacle Blind
.... says the guy without a wrench in his hand.
RE: Spectacle Blind
RE: Spectacle Blind
As Zdas04 said, a contractor used paper gasket. When I saw the paper gasket, I just wonder how can the change-over be done efficiently. Therefore, I come here and seek for your expert advise. Apart from the gasket problem, another headache problem is that I find corrosion on the blind side of the spectacle blind. In the isolation state, the corroded blind surface should lead to leakage even all the rust are removed.
By the way, I do think that spectacle blind and valve serve different purposes. As spectacle blind provide guaranteed isolation whereas valve does not.