General Carbon Corporation


High Pressure Liquid Adsorbers

GC HP-Series Liquid Adsorbers are designed for industrial and municipal water applications. HP series adsorbers can be provided individually or as a duplex system. Duplex systems can be skid mounted with a valve “tree” allowing lead/lag or parallel operation and the isolation of either tank for servicing. HP Series  adsorbers have a pressure rating of 75 PSIG. They can be built to ASME Code Section VIII Div 1 standards and “stamped” if required. Standard internal lining is a two part Epoxy with a complete range of commercial coatings available. PVC internals are standard with stainless steel as an option. The HP Series can also be custom fabricated to meet site requirements. 

  – Down-flow fixed bed with backwash capability
  – Carbon steel fabrication, 75 PSIG pressure rated – ASME code stamp optional 

  –  Two (2) part epoxy internal lining
  – PVC Internals
  – Access manways for easy maintenance
  – Optional bulk carbon transfer for economical operation

Series # HP-500 HP- 1000 HP-2000 HP-3000 HP-5000 HP-10000 HP-20000
Height 5’11” 7’2” 8’6” 8’11” 9’11” 10’9” 15’10”
Diameter 30” 36” 48” 60” 72” 96” 120”
GAC 500lbs 1,000lbs 2,000lbs 3,000lbs 5,000lbs 10,000lbs 20,000lbs
GPM 8-25 10-35 15-70 25-150 35-165 60-300 100-480
PSIG 75 75 75 75 75 75 75
Max VAC 28” 28” 28” 28” 28” 28” 28”
Bed Volume FT³ 20 35 75 117 196 400 780


1 Flow Rate at Loading of 5 gpm/ft.2 Bed Cross Section Area through one tank.
2 Pounds of Carbon is for Density of 28 lbs./ft.3 and allowing 50% Bed Expansion for Backwash.
3 Empty Bed Contact Time for given Maximum Flow.

Installation & Startup – HP-Series adsorbers are shipped empty along with the required activated carbon. The adsorber should be connected and all fittings pressure tested for leaks before the carbon is installed through the top access hole. After the carbon has been loaded, the unit should be filled with clean water through the bottom collector, and allowed to degas for 8-12 hours if possible. Backwashing the carbon is recommended to remove carbon fines that can cause excessive pressure drop through the unit. Multiple units are usually connected in series with testing between the units advised to determine when the first unit needs to be changed out.

Maintenance – The only maintenance the HP-Series adsorbers require is the testing of effluent quality, and checking the operating pressure of the system. Monitoring the contaminant level into the last unit in a series arrangement is the recommended safeguard against having breakthrough in the final outflow. When the concentration of contaminants in the flow coming out of the lead unit equals the concentration of the flow into the unit, the unit has reached its removal capacity and needs to be serviced. The working life of carbon is dependent upon the type of contaminant in the water as well as its concentration and the liquid flow rate. A pressure relief device is advised to prevent damage to the system in the event of excessive pressure buildup. Backwashing an adsorber that is operating at an elevated pressure will sometimes provide a temporary lowering of the pressure drop through the unit.

Servicing – Once an HP-Adsorbers carbon is saturated by contaminants, the unit should be taken off line and fresh carbon installed. To purchase replacement carbon or to arrange for a carbon change-out, please contact our office.

Disposal – If you change the carbon out yourself, please dispose of the spent carbon in accordance with Local, State and Federal regulations.

Available Options – Custom features are available for special needs. ASME Section VIII Code Stamp, stainless steel tanks and/or internals, food grade or severe service coatings inside or out, custom sizes for space limitations and different connection locations for hookup to existing plumbing are routine requests. Please call us with your needs.


Wet activated carbon removes oxygen from air causing a severe hazard to workers inside carbon vessels. Confined space/low oxygen procedures should be put in place before any entry is made. Such procedures should comply with all applicable Local, State and Federal guidelines.