Download - Glycol Pumps

Glycol Pumps

Operating Pressure: 100 to 2000 psi

Circulation Rate: 3 to 450 gph

• A pump used for circulating glycol within a dehydration system.

• A pump used to circulate amine within a desulphurizer system.

What is a Glycol Pump?

Features

• No auxiliary power required

• Eliminates need for level control and dump valve at absorber

• Low gas consumption

• Completely sealed system prevents glycol loss

• Only two moving assemblies

• Hydraulic “cushioned” check valves withremovable seats of hardened stainless steel

• Circulation Rates: SC Series 8 - 200 gph PV Series 3 - 450 gph

Inlet Scrubber

Wet Gas Inlet

Condensate Outlet

Contactor Tower

Glycol Cooler

Dry GasOutlet

High Pressure Filter

Reboiler

Surge Tank

Three Phase Gas, Glycol &Condensate Separator

Excess Separated Gas Outlet

Condensate Outlet

Natural Gas Dehydrator

Wet Glycol from Absorber (High Pressure)Wet Glycol to Reboiler (Low Pressure)Dry Glycol from Reboiler (Low Pressure)Dry Glycol to Absorber (High Pressure)


Absorber(Contactor)

Heat exchangersurge tank

Reboiler

Pump

Wet glycol

Dry glycol

Wet glycol

Dry glycol

WetGas In

Dry Gas Out


Absorber(Contactor)


Reboiler

Pump

Wet glycol

Dry glycol

Wet glycol

Dry glycol

WetGas In

Dry Gas Out

Wet gas enters the bottom of the absorber.


Absorber(Contactor)


Reboiler

Pump

Wet glycol

Dry glycol

Wet glycol

Dry glycol

WetGas In

Dry glycol enters from the top of the Absorber Tower.


Absorber(Contactor)


Reboiler

Pump

Wet glycol

Dry glycol

Wet glycol

Dry glycol

WetGas In

Dry Gas Out Dry gas exits from the top of the Absorber.

High pressure wet glycol goes to Glycol Pump.

DRY glycol falls through the bubble caps, as the WET gas travels up through the bubble caps.


Absorber(Contactor)


Reboiler

Pump

Wet glycol

Dry glycol

Wet glycol

Dry glycol

WetGas In

Dry Gas Out

Low pressure WET glycol goes to the reboiler to be dehydrated.

Piston ready to move to the right


Piston on its way to the right


Piston ring contacts actuator


Actuator moves ‘D’ slide to the right


‘D’ slide shifts ports


High pressure shifts pilot piston


Reversal of flow shifts check valves

Wet Glycol from Absorber (High Pressure)Wet Glycol to Reboiler (Low Pressure)Dry Glycol from Reboiler (Low Pressure)Dry Glycol to Absorber (High Pressure) Animation

Pump Trouble Shooting

• Loss of fluid circulationRunaway pumpHammering sound

Pump skips

• Pump runs until normal temp. is reached

• Erratic pump speed

• Pump stalls

• Leaking check valvesValve body sealDart seal

• Piston, piston rod seals

• Suction Lines too small

• Traps in wet glycol power piping send alternate slugs of glycol-then gas

• Plugged lines in dehy system• Swollen O-rings• Plugged passages in pump• Blocked check valve• Loose actuator


• Loss of fluid circulationRunaway pumpHammering sound

Pump skips

• Pump runs until normal temp. is reached

• Erratic pump speed

• Pump stalls

• Leaking check valvesValve body sealDart seal

• Piston, piston rod seals

• Suction Lines too small

• Traps in wet glycol power piping send alternate slugs of glycol-then gas

• Plugged lines in dehy stystem• Swollen O-rings• Plugged passages in pump• Blocked check valve• Loose actuator


• Gas blow-by to wet discharge

• Excessive service required

• ‘D’ slide seal or port plates

• Pilot piston seal failure

• Poor Maintenance• Poor filtration• Chemical

contamination