Metering Pump Spare Parts Replacement

Pump Components (Metering Pump) Pumps are supplied with a 120VAC or 240VAC power cord. Use care to ensure pump is plugged into a properly grounded receptacle. Be sure the pump is properly anchored before connecting tubing and other pump components Pumps are traditionally installed one of two ways, Suction lift and flooded suction.

Pump Components (4-FV) The Four function valve (4-FV) mounts on the discharge side of pump head 4 functions of valve Back pressure (yellow) Anti-siphon (yellow) Pressure relief (black) Line drain (black)

Pump Components (Foot Valve and Weight) The foot valve is positioned at the bottom of the supply tank In suction lift applications the Foot valve is used to prevent loss of prime A filter screen prevents debris from entering the pump Note: Position foot valve vertically Ceramic weight Foot valve Filter screen

Pump Components (Injection Check Valve) The Injection check valve is positioned at the end of the discharge tubing line A 1/2” NPT thread allows the ICV to be piped directly into a pressurized line The flapper valve prevents deposits from clogging the injector Note: Install on underside of pipe Flapper valve 1/2 NPT pipe thread

Pump Components (Discharge and Suction Tubing) Most pumps come equipped with flexible PE tubing for the discharge and suction connections In some liquid ends vinyl tubing is offered. This low pressure tubing should be used on the suction line only. In applications requiring pipe connections, fittings are supplied with NPT pipe threads. No tubing is supplied with these pumps. Optional black UV tubing is available for UV applications

Spare Part Replacement Kit Spare part kits, replacement tubing and other pump components can be obtained from your local pump supplier Spare parts should be replaced annually It is also recommended that discharge and suction tubing be replaced annually

Protective Clothing and Eye Protection CAUTION: Wear protective clothing and eye protection when working on or near all chemical metering pumps. A full face shield and long chemically resistant gloves and apron are recommended. Check MSDS sheet for other precautions

De-Pressurize Liquid End Turn pressure relief knob (black) 1/4 turn Discharge line is now de-pressurized Solution should flow back down discharge line and out return line back to supply tank

Remove Discharge Tubing Remove discharge tubing Turn coupling nut counter-clockwise to remove. Remove tubing from fitting by pulling up.

Remove Return Line Tubing Remove return line Turn coupling nut counter-clockwise to remove. Pull tubing out of valve

Remove 4-FV From Head Remove 4-FV Turn 4-FV counter- clockwise to remove

Remove Discharge Cartridge Valve (Check Valve) Remove discharge cartridge valve or check valve ball and seal ring from pump head

Remove Cartridge Valve (Check Valve) Remove suction fitting by unscrewing counter -clockwise Remove cartridge valve or check valve ball and seal ring from pump head

Remove Pump Head Remove pump head Remove the four screws that mount the pump head

Remove Old Pump Diaphragm Remove the pump diaphragm by turning it counter-clockwise

Remove Old Diaphragm and Disk Remove the diaphragm and backing disk Discard diaphragm and inspect disk for damage

Remove Shaft Seal Remove the shaft seal using needle nose pliers. Pull shaft seal out and discard

Replace Shaft Seal Install the new shaft seal using a large hollow pen cap or wrench socket large enough to clear diaphragm shaft Push seal in place

Replace Pump Diaphragm Install the disk and new pump diaphragm by turning it clockwise position diaphragm in and out until the center of the diaphragm is flush with outside of the spacer housing

Replace Pump Head Re-install the four screws that mount the pump head loosely Tighten the screws gradually in a crisscross pattern until all screws are tight

Compression Washer Replacement Compression washers are located in fittings and function valves If necessary, remove washer with small screw driver Install new washer by hand by pushing into fitting

Correct Installation of Cartridge Valves BOTTOM TOP Direction of Flow CORRECT POSITION INCORRECT Smooth side Ball seat side

Cartridge Valves vs. Ball and Seal Rings Direction of Flow BALL & SEAL RING EXAMPLE: FOOTVALVE FOR LARGER PUMPS EXAMPLE: FOOT VALVE FOR SMALLER PUMPS CARTRIDGE VALVE SHOWN DIS ASSEMBLED

Replace Suction and Discharge Cartridge Valves (Check Valve) Install new cartridge valves or check valve balls and seal rings in pump head Place o-ring on cartridge valve Position ball seat side of cartridge valve toward floor Hand tighten fittings do not use pliers of pipe wrench

Injection Check Valve Spare Parts Install new Injection check valve components Screw fitting down hand tight. Do not use pliers or pipe wrench SPRING BALL PTFE SEAT O-RING

Install new cartridge valve and o-ring Place o-ring on cartridge valve Position ball seat side of cartridge valve toward floor Screw fitting down hand tight. Do not use pliers or pipe wrench Foot Valve Spare Parts CARTRIDGE VALVE O-RING

Install New Pump Tubing Replace all discharge and suction tubing annually Contact your local pump supplier for replacement tubing Do not re-start pump until all tubing connections have been made