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  • Users: notnats
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  1. notnats

    Bonding "stickyback

    I posted this enquiry under welding bonding and fastener engineering, and only got one reply (thank you MadMango). Perhaps there might be more feedback here. We use a material we buy as "stickybacK" and glue it to a stainless or galvanised steel sheet. It is used to hold a polymer letterpress...
  2. notnats

    Bonding "sticky back" to steel

    We use a material we buy as "stickybacK" and glue it to a stainless or galvanised steel sheet. It is used to hold a polymer letterpress printing plate in place during a scrubbing process in a warm water bath while the non-image areas of the plate are brushed away. Over the last 10-15 years we...
  3. notnats

    Pumping from a vacuum vessel

    For some years we have been manufacturing a system which uses a positive displacement screw pump to remove liquid from a vacuum chamber. To prevent cavitation we keep a metre of liquid above the pump suction port and keep the suction line twice the diameter of the port as close to the pump as...
  4. notnats

    what causes a noisy valve?

    I am using a modified globe valve to regulate flow from a filtering plant. A relief valve is fitted upstream from the globe valve. This valve cracks at 2.5 bar and at full flow of about 5000l/h has a back pressure of 8 bar. The medium is light oil about 15 cSt. To get good flow control we have...
  5. notnats

    rolling circumference of tyres

    Here is a paradox that automotive engineers can solve for me. Because a tyre is slightly flattened at the point of contact with the road, the height of the axle above the road is less than the radius of the tyre. The driving torque of the axle produces a forward force at the point of contact...
  6. notnats

    160A 3 phase plug for China

    We are supplying some portable equipment to Hong Kong for use in the New Territories. Our problem is that we have to supply a 400V 160A 3Ø power plug for it and we are having trouble finding out what plug type is required for China. Is there an international standard for plugs of this size...

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