Pulsafeeder K4PVS5 Size 4 KOPkit
The Pulsafeeder K4PVS5 is a genuine Pulsatron KOPkit (Keep On Pumping kit) for size 4 Pulsatron solenoid diaphragm metering pumps with the PVS5 wet end code. It rebuilds the complete liquid end in one go: a new GFPPL pump head, PTFE-faced diaphragm, suction and discharge valve cartridges with FKM fluoroelastomer seats and O-rings and 316 stainless steel check valve balls, diaphragm shims, head screws and washers, and a bleed valve O-ring, with an exploded view drawing to follow. The parts are sealed in the bag so a kit kept on the shelf stays clean until it is needed. GFPPL is the general purpose head material and handles most water treatment chemicals, including cooling tower and boiler treatment programs. FKM fluoroelastomer seats and O-rings stand up to many acids, hydrocarbons and oxidizers where other elastomers swell. The kit connections suit 3/4 in OD suction and 1/2 in OD discharge tubing.
The kit number is printed on the pump data label, and it can also be worked out from the pump model number: take the letter K, then the fourth character of the model number (the head size), then the four characters of the wet end code. Size 4 pumps include models such as LB04, LB64, LBC4, LC04, LC54, LPB4, LPD4, LPE4, LPF4, LPG4, LPH4, LMB4, LMD4, LME4, LMF4, LMG4 and LMH4, but the wet end code has to match as well, because it sets the materials and the tubing connection. Rebuilding with a full kit rather than a single valve cartridge is the right call once a pump has started losing prime, delivering less than its setting or weeping at the head, since the diaphragm and both check valves wear together.
Key Features
- Genuine Pulsatron KOPkit for size 4 pumps, wet end code PVS5
- New glass-filled polypropylene (GFPPL) pump head
- PTFE-faced diaphragm with shims for correct setup
- FKM fluoroelastomer valve seats and O-rings with 316 stainless steel balls
- Pre-assembled suction and discharge valve cartridges
- Head screws, washers and bleed valve O-ring included
- Exploded view drawing in the kit
Applications
- Pulsatron size 4 metering pumps with the PVS5 wet end
- Scheduled preventive maintenance rebuilds
- Restoring lost prime and output
- Water and wastewater chemical feed
- Cooling tower, boiler and disinfection systems
- Marine and industrial chemical dosing
Specifications
- Brand: Pulsafeeder Pulsatron
- Manufacturer Part Number: K4PVS5
- Part Type: KOPkit liquid end rebuild kit
- Head Size: 4
- Head Material: Glass-filled polypropylene (GFPPL)
- Seats and O-Rings: FKM fluoroelastomer
- Check Valve Balls: 316 stainless steel
- Connection: 3/4 in OD suction and 1/2 in OD discharge tubing
- Diaphragm: PTFE faced
- Quantity Needed: One kit per pump
- Condition: New
Frequently Asked Questions
Q: Why is the pump losing prime after a rebuild?
Usually air in the suction line or a valve cartridge fitted upside down. The cartridges are directional, so check the flow arrows before tightening, then use the bleed valve to purge the head.
Q: How often should a Pulsatron be rebuilt?
Most installations plan on a rebuild every year, and sooner on aggressive chemicals or continuous duty. Keeping a kit on the shelf means a failure costs minutes rather than days.
Q: Do I need to reuse the old shims?
If you know how many shims were fitted under the old diaphragm, use the same number. If not, the setup procedure in the kit drawing shows how to shim the new diaphragm from scratch.
Q: What should the stroke length be set to during the rebuild?
Set the stroke length to 50 percent and unplug the pump before removing the diaphragm. That positions the shaft correctly for the new diaphragm to be threaded on.
Not sure this is the right part? Send us a Picture of the Pump Plate on your pump and the CLR Marine team will confirm the correct KOPkit.
CLRMarine
