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Jeff Brimble

  • Posts: 4347
Re: Whats the physics behind microbore
« Reply #20 on: July 18, 2007, 09:38:08 pm »
You can usually feel the shock wave right up the pole as the lorry goes over it- strange feeling.

jeff1

  • Posts: 5855
Re: Whats the physics behind microbore
« Reply #21 on: July 18, 2007, 09:40:32 pm »
You can usually feel the shock wave right up the pole as the lorry goes over it- strange feeling.

FEEL IT  ;D ;D I seen the shock wave coming up the road. ;D ;D

Jeff Brimble

  • Posts: 4347
Re: Whats the physics behind microbore
« Reply #22 on: July 18, 2007, 09:41:57 pm »
Oh the wheel barrow tank 125L back a few posts may not be that good it seems its £399  :'(

NWH

  • Posts: 16952
Re: Whats the physics behind microbore
« Reply #23 on: July 18, 2007, 10:02:54 pm »
What do williamsons recomend you use as far as hose goes.

*foxman

  • Posts: 250
Re: Whats the physics behind microbore
« Reply #24 on: July 19, 2007, 02:19:54 am »
I have 100mtrs of microbore and it keeps blowing presure switches and flo cntrls WHY.

You probably have 6mm hose that has issues with some setups, move up to 8mm and it should solve any probelms and still have all the benefits.

JM123

  • Posts: 2095
Re: Whats the physics behind microbore
« Reply #25 on: July 19, 2007, 12:00:30 pm »
or alternatively just get a varistream and bypass the pressure switch. 
Live life in the fast lane.......if you break down you'll freewheel further

Ballymena N.I

Jeff Brimble

  • Posts: 4347
Re: Whats the physics behind microbore
« Reply #26 on: July 19, 2007, 04:57:34 pm »
I agree, you can have pressure switches set up to various pressure, I find a simple by pass will cope with any pressures.

JM123

  • Posts: 2095
Re: Whats the physics behind microbore
« Reply #27 on: July 19, 2007, 05:02:21 pm »
Hi Jeff

I mean to electronically bypass the pressure switch, when you use a varistream the pressure switch is disconnected.
Live life in the fast lane.......if you break down you'll freewheel further

Ballymena N.I

Jeff Brimble

  • Posts: 4347
Re: Whats the physics behind microbore
« Reply #28 on: July 19, 2007, 05:36:46 pm »
Thanks. For many years I used pumps without the option of pressure switches and got round the problem with a small external by pass which still serves me well. New innovations like the Variflow and an internal by pass fitted to the pumps alleviate the need for pressure switches. As Alaex said previously you can happen on the right balance combination of flow versus pressure by using the correct diameter hose matched up to the length. Which is what I did using the small 35psi pumps. Its the simple method. The Variflow and internal bypass is the modern method. Mine costs me £4

NWH

  • Posts: 16952
Re: Whats the physics behind microbore
« Reply #29 on: July 19, 2007, 07:31:53 pm »
With the varistream when you unplug the pole with the pressure switch being disconnected does this mean that the pump dosen`t cycle,what i`m saying is does it in effect turn the pump off and then turn on again when you plug pole back in.