Search results for query: *

It seems like you have a control problem and both the valv and the actuator are not quite right. I have previously designed a valve system for projects where fine control was in one direction and the balance went to bypass. I found the trick was to fine control the main outlet flow by adjusting...

Sounds like you need an energised seal (spring-loaded lip seal)or one of the other specialised seals. It is common at these pressures ( and higher pressures) to use special metallic seals with an elastomeric backup. If the seal diameter is large or temperatures are involved you must take account...

Tod, Apart from Oil viscosity are you sure no vaporisation is occurring - especially if some water has got into the oil. Martin

Frankieboy, I may have missed the point but I think you need to slide two surfaces with a moderate loading, preferably without a requirement for lubrication and with minimum wear. I have used stainless on carbon steel (and even Low Alloy on low alloy but I would not recommend it)in simílar...

If carbide precipitation is a problem, why not go for a low carbon steel such as 304L, or even better 321 or 316Ti which are titanium stabilised to prevent "dicourage" carbide precipitation. The offshore or naval people are familiar with these grades for prevention of intergranular...

I have been asked to prepare some programs on heat losses from below ground pipelines. In general we are looking at long (say 70km) pipelines, about 24 inch diameter and containing oil with some entrained water. Ambient temp 0°C to 40° C. Oil temp 50 °C - 70 ° C. The pipelines will traverse...

is your question in relation to a centrifugal fan or pump. If so ( for most impeller types) the pressure will decrease as flow rate increases but the motor power will increase. This is why you start centrifugal pumps/fans against a closed outlet - but re-confirm this with the vendor as some...

Don´t forget that in addition to the 12.5 % tolerance you have to include any corrosion allowance

You have probably got this point covered but you must be careful that none of your materials (including supports etc) that are subject to low temp will experience britttle fracture. This normally only applies to the carbon steel components but at least once every twenty years there has been a...