As per our telephonic discussion for, 
1)Feed pump horizontal distance from pump discharge to skid is 12 meter and vertical distance 6 meter.
2) Distillate pump horizontal distance from pump discharge  is 15 meter and vertical distance 15 meter.
3) We may use mechanical seal combination same as in  your previous job i.e. Inboard Sic v/s Sic & outboard C v/s Sc.
4) No butterfly valve should be used.
