Pulsafeeder PulsaPro PP680

Questions and Answers

D
donaldgarciaAug 18, 2025
What to do if Pulsafeeder PulsaPro PP680 Water Pump has no delivery?
- K
  Kenneth BowersAug 18, 2025
  If your Pulsafeeder Water Pump isn't delivering, first check the power source and wiring diagram to ensure the motor is running. Make sure the supply tank isn't empty and that lines and strainers aren't clogged. Open any closed line valves and clean/inspect ball check valves. Increase suction pressure to address vapor lock or cavitation. Re-prime the pump, checking for leaks, and re-prime the pump if the hydraulic system is under-primed.
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Robert ChavezAug 23, 2025
What to do if Pulsafeeder PulsaPro PP680 Water Pump delivery is gradually dropping?
- J
  Jennifer BishopAug 23, 2025
  If the delivery of your Pulsafeeder Water Pump is gradually dropping, start by checking for check valve leakage and clean or replace the valve if damaged. Look for any leaks in the suction line and correct them. Clean or replace the screen if the strainer is fouled. Check the product viscosity and correct for bypass valve leakage. Inspect the piston seal for wear or damage and replace if necessary. Ensure the supply tank vent isn't plugged; if it is, unplug it.
A
andreapenningtonAug 26, 2025
Why Pulsafeeder PulsaPro PP680 does not start?
- A
  adamscindyAug 26, 2025
  If your Pulsafeeder Water Pump isn't starting, check if the coupling is disconnected and connect it. Verify the power source is working correctly. Replace any blown fuses or tripped circuit breakers, addressing any overloads. Locate and repair any broken wires. Ensure the pump is wired correctly by checking the wiring diagram. Finally, check for and open any pipeline blockages.
C
Chris BlackburnAug 28, 2025
What causes erratic delivery in a Pulsafeeder PulsaPro PP680 Water Pump?
- D
  David NobleAug 28, 2025
  Erratic delivery in your Pulsafeeder Water Pump can be due to a leak in the suction line (locate and correct), product cavitation (increase suction pressure), entrapped air or gas in the product (ensure proper venting of system), erratic motor speed (check voltage and frequency), or fouled check valves (clean, replace if necessary).
J
Jennifer AndersonAug 30, 2025
How to fix noisy gearing or knocking in a Pulsafeeder Water Pump?
- B
  Brandon SmithAug 30, 2025
  To address noisy gearing or knocking in your Pulsafeeder Water Pump, first reduce the pressure if the discharge pressure is too high. If water hammer is the cause, install a dampener. If the hydraulic bypass valve is set too high, readjust it.
A
Anna DixonSep 1, 2025
What causes a Pulsafeeder PulsaPro PP680 to overheat?
- J
  John PageSep 2, 2025
  If your Pulsafeeder Water Pump motor overheats, check the operating conditions against the pump design to see if the pump is overloaded. Also, check the power source for high or low voltage. Finally, trace and correct any loose wires.
B
Brittney HicksSep 4, 2025
Why is the delivery higher than rated in my Pulsafeeder PulsaPro PP680 Water Pump?
- J
  Jimmy FoleySep 4, 2025
  If the delivery rate of your Pulsafeeder Water Pump is higher than its rating, it could be because the suction pressure is higher than the discharge pressure. In this case, install a backpressure valve. It could also be that the back pressure valve is set too low, increase the setting. If the back pressure valve leaks, repair, clean, or replace it. Review calculations if there's a calibration error.
J
Jason ClaytonSep 7, 2025
What causes noisy piping in a Pulsafeeder Water Pump?
- J
  John GarciaSep 7, 2025
  Noisy piping in your Pulsafeeder Water Pump may be caused by a pipe size that is too small (increase the size of piping), pipe runs that are too long (install dampener in line), surge chambers that are flooded (repair with air or inert gas; if dampener is installed, replace diaphragm and recharge), or the absence of surge chambers (install dampener).
R
Randy SanchezSep 9, 2025
What to do if Pulsafeeder Water Pump loses hydraulic oil?
- M
  Mary VaughanSep 9, 2025
  If your Pulsafeeder Water Pump is losing hydraulic oil, the diaphragm may have ruptured (replace diaphragm), the seal may be leaky (replace seal), or the cover gasket may be leaking (replace or retighten).
R
Robert HollandSep 12, 2025
What to do if Pulsafeeder PulsaPro PP680 head gasket leaks?
- M
  Michelle NashSep 12, 2025
  To fix a leaking pump head gasket on your Pulsafeeder Water Pump, replace the gasket and tighten the pump head bolts, applying sealing compound.

Summary

Pulsafeeder Factory Service Policy

TRADEMARKS

Registered trademarks of Pulsafeeder, Inc.

SAFETY CONSIDERATIONS

Essential safety precautions for installation, operation, and maintenance.

CONVENTIONS

Explains symbols like WARNING and NOTE used in the manual.

REVISION HISTORY

Records changes and updates made to the manual over time.

1. Introduction

Introduction and Preliminaries

Covers receiving inspection, general info, personnel, testing, and trademarks.

Warranty

Details the warranty period and conditions for PulsaPro pumps.

2. Transport and Storage

Handling and Unpacking

Procedures for receiving, unpacking, and handling pump packages.

3. Storage Instructions

Storage Procedures

Guidelines for both short-term and long-term storage of pumps.

4. Principles of Operation

Overall Operation and Nameplate

Explanation of pump function and identification via nameplate.

4.3 Flow Rate, Intended Use, and Components

Types of Diaphragms

Flat Diaphragm

Standard design for high performance metering in a leak-free operation.

HYDRAtube

Ideal for sheer sensitive, high viscosity fluids and slurries.

Pump Head Assembly Components

Diaphragm Types

Overview of Flat, HYDRAtube, HYDRAcone, and Double Diaphragm types.

Key Valves and Functions

Description of PTP and HPV valves for system function.

Hydraulic Bypass Valve (HBV)

Manual Control;Stroke Adjustment

How to adjust the pump's flow rate using the stroke length control knob.

Automatic Stroke Adjustment

Gear Ratio Assembly;Motor Adaptor

How motors are mounted and power is transmitted to the pump.

5. Installation

5.1 Location

Considerations for selecting an installation site, including environment and foundation.

5.2 Ideal Metering Pump Installation

5.3 Suction Pressure Requirements

5.4 Discharge Pressure Requirements

5.5 PULSAlarm Leak Detection Electrical Connections

6. Equipment Setup

6.1 Hydraulic Oil Fill

Procedure for filling the gearbox and intermediate head with hydraulic oil.

6.2 Drive Motor Installation

Steps for installing the drive motor onto the pump adaptor.

6.3 Drive Motor Wiring

6.4 Motor Rotation

7. Startup Procedure

7.1 Output Adjustment

How to adjust the pump's stroke length to control output flow.

7.2 Suction System

Ensuring proper suction system setup before pump operation.

7.3 Priming the Pump Head

Procedure for purging air from the hydraulic system.

7.4 Priming the Reagent Head

Steps for priming the reagent head and suction line if needed.

7.5 Calibration

8. Maintenance

8.1 Operating Precautions

Safety measures and prerequisites before performing maintenance.

8.2 Consulting with Technical Documentation

Importance of using manuals and drawings for maintenance tasks.

8.3 Oil Changes

Recommended schedule and procedure for hydraulic oil changes.

8.4 Wet End Removal, Inspection, and Reinstallation

Flat Diaphragm Replacement

HYDRAtube Replacement

PFA HYDRATUBES

HYDRAcone Replacement

Flat Diaphragm Priming

Procedure for priming the flat diaphragm after maintenance or assembly.

HYDRAtube Priming

8.6 Check Valves

Description of Check Valves

Description of check valves, their function, and common problems.

Check Valve Removal, Inspection, and Reinstallation

8.7 Hydraulic Performance Valve (HPV)

Check Valve Screen (HPVC) - Removal and Cleaning

Procedure for removing and cleaning the HPVC screen.

8.8 Hydraulic Bypass Valve (HBV)

8.9 Push to Purge (PTP)

Explanation of the PTP valve's function in removing hydraulic system gases.

Piston Seals

Piston Seal Replacement

Small Piston Sizes (7;8 and under)

Detailed steps for replacing piston seals on smaller piston sizes.

Large Piston Sizes (above 7;8)

Detailed steps for replacing piston seals on larger piston sizes.

8.11 Oil Seal

Replacing the Oil Seal

Steps for replacing the oil seal on the worm shaft.

8.12 Pump Motor Removal & Reinstallation

Pump Motor Removal & Reinstallation

Procedure for removing and reinstalling the pump's drive motor.

9. Troubleshooting Chart

Performance Issues

Troubleshooting for flow rate, delivery drops, erratic delivery, and high delivery.

Operational Failures

Troubleshooting for pump not starting, no delivery, and hydraulic oil loss.

Diagnosis of Diaphragm Failure

Diaphragm Damage Causes

Causes of diaphragm failure like puncture, extrusion, wear, and chemical incompatibility.

10. Technical Service Support

Service Contact Information

Details on authorized service centers, local reps, and factory support.

11. APPENDIX I

11.1 PULSAlarm Leak Detection System

Description of the PULSAlarm system for detecting diaphragm leaks.

11.2 PULSAlarm Leak Detection Diaphragm

Details on the construction and function of the PULSAlarm diaphragm assembly.

11.2.1 Reinstallation of Leak Detection Diaphragm

11.3 Priming of Leak Detection Diaphragm

12. APPENDIX II

12.1 Piping Calculations

Formulas and requirements for calculating NPIP and system pressures.

12.2 System Back Pressure

12.3 Nomenclature

13. APPENDIX III

13.1 Oil Specification

Important health, safety, and environmental information for PULSAlube Ultra 6HGS oil.

14. APPENDIX IV

14.1 Bolt Torque Recommendations

Torque specifications for reagent head and tie bar bolts for various models.

15. APPENDIX V - Accessories

15.1 PULSAtrol Pulsation Dampener

Information on the PULSAtrol dampener for improving NPIPA and reducing pressure pulses.

15.2 Back Pressure Valve

15.3 Pressure Relief Valve