<%
Dim referer 'Not my fault its spelt wrong in RFC 1945. /jab
Dim UA
Dim family
Dim goodBot
'
'3 lines below were for development / debug.
'Response.Write("Agent: "+Request.ServerVariables("HTTP_user_agent")+"
")
'Response.Write("Host: "+Request.ServerVariables("HTTP_host")+"
")
'Response.Write("Referrer: "+Request.ServerVariables("HTTP_referer")+"
")
referer = Request.ServerVariables("HTTP_referer")
If Instr(referer, "accumulators.co.uk") <> 0 Then
family = True
ElseIf Instr(referer, "hydropneumatics.eu") <> 0 Then
family = True
ElseIf Instr(referer, "hydro-pneumatics.eu") <> 0 Then
family = True
ElseIf Instr(referer, "hydrotrole.co.uk") <> 0 Then
family = True
ElseIf Instr(referer, "ldi.co.uk") <> 0 Then
family = True
ElseIf Instr(referer, "pulseguard.co.uk") <> 0 Then
family = True
ElseIf Instr(referer, "shock-alleviators.co.uk") <> 0 Then
family = True
ElseIf Instr(referer, "shockguard.co.uk") <> 0 Then
family = True
Else
family = False
'Is this a crawl by a good bot?
UA = Request.ServerVariables("HTTP_user_agent")
If Instr(UA, "GoogleBot") <> 0 Then
goodBot = True
ElseIf Instr(UA, "DuckDuck") <> 0 Then
goodBot = True
ElseIf Instr(UA, "Bing") <> 0 Then
goodBot = True
ElseIf Instr(UA, "Baidu") <> 0 Then
goodBot = True
ElseIf Instr(UA, "YouTube") <> 0 Then
goodBot = True
ElseIf Instr(UA, "Slurp") <> 0 Then
goodBot = True
Else
goodBot = False
End If
End If
If family = False AND goodBot = False Then
Response.Redirect("https://www.ldi.co.uk")
End If
%>
ShockGuard - Shock Surge and Water Hammer
Shock, Surge and Water Hammer
Shock waves are created in a pipe full of liquid when either a valve is closed too quickly, forcing the liquid column to stop moving more quickly than it wants to, or when a pump is started up too quickly, forcing the liquid column to start moving more quickly than it wants to. In either situation, the shock wave travels up and down the pipe through the liquid, banging against each end of the pipe.
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This banging can be heard as water hammer. Try it at home - turn on your tap, then turn it off very quickly. You should hear a bang, and maybe even several. If you turn the tap off more slowly, it should stay quiet, as the liquid in the pipes slows down more gradually. |
In industry, the pipes can be very large, and water hammer may not just be heard as a bang - it can cause a great deal of damage, even rupturing pipes. LDi can supply a range of hardware to prevent these shocks, and a complete software-based water-hammer analysis to recommend system modifications which remove the shock.
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