Building bespoke bars, supply and fit dispense equipment or just supply of beer line, fittings etc, just give me a call or messgae, if i can help... I will..
The main issue i have found with all beer dispense is temperature control. It is crucial that the kegs must be kept at or below 12', a higher temperature will result in foaming.
The connectors from a keg are generally "s" or "G" or Sankey or Grundy type you will find annoyingly the keg connectors are not interchangeable, all types work by the same principle, the side connector is a gas port and the beer port is at the top. You will need a gas bottle and regulator, generally 60/40 is perfect for home bars, the regulator should dispense at 27 psi.
A Cellar buoy can be used to reduce loss when changing kegs, not really an issue for the home bar..
from the beer out on the coupler the beer can then go through an optional chiller and onto the tap, a flow control is advised as if the beer is a little gassy you can control the flow to the tap, the output from the flow control should be reduced to 3/16 tube for around 2' or 600mm from the tap reducing the foaming. REMEMBER.. when pouring from a tap, hold it fully on, otherwise you will get just foam.... DRINK!!
The main issue i have found with all beer dispense is temperature control. It is crucial that the casks and Bag in box beers must be kept at or below 12', a higher temperature will result in spoilt beer and possible secondry fermentation in unpasteurised beers.
Unlike kegged beers cask and BIB beers are not carbonated but naturally conditioned, this will result in some release of CO2 and this gas needs to be released. Either by venting a cask using a caskwidge extractor or by standing your BIB "tap up" and releasing the pressure.
For a home bar the beer tube can then go straight to the pump, The addition of a check valve would prevent a build up of pressure in the cask or BIB causing a free flow at the pump. the check valve should really be named a demand valve, beer will not flow forward until the demand from the pump causes a silicone diaphram in the valve to allow the flow of beer.
An assistor pump can be used for longer runs from source to pump, it will reduce wear on the hand pulls cylinder, it works on pressurised gas, either air from a compressor, or beer gas,(which will need venting outside... connect, pull and DRINK!!