Wilden P4 series - User Manual

Wilden P4 series

51 pages

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WIL-10310-E-07

Replaces WIL-10310-E-06

Simplify your process

Engineering

Operation &

Maintenance

Original

™

Series METAL Pumps

P4/PX4

Table of Contents

Questions and Answers

D
drileyJul 28, 2025
Why are there air bubbles in my Wilden Water Pump discharge?
- C
  Christine Fernandez DVMJul 28, 2025
  If you observe air bubbles in the Wilden Water Pump discharge, several factors could be at play. Begin by inspecting the diaphragms for any ruptures. Next, verify the tightness of the outer pistons. After that, check the tightness of all fasteners and the condition of O-rings and seals, with particular attention to the intake manifold. Finally, ensure all pipe connections are completely airtight.
D
Douglas RiosAug 8, 2025
What to do if product comes out of the air exhaust of my Wilden P4 Water Pump?
- D
  Dr. Kimberly HamiltonAug 8, 2025
  If product is coming out of the air exhaust of your Wilden Water Pump, examine the diaphragm for ruptures. Also, check the tightness of the outer pistons to the shaft.
N
nsmithAug 15, 2025
What to do if my Wilden P4 Water Pump runs but little to no product flows?
- A
  Ashley RamosAug 15, 2025
  If your Wilden Water Pump runs but little or no product flows, check for pump cavitation. If cavitation is occurring, slow the pump speed down to allow thick material to flow into liquid chambers.
P
Phillip ElliottAug 20, 2025
How to prevent my Wilden Water Pump air valve from freezing?
- T
  tyrone02Aug 20, 2025
  To address a frozen air valve in your Wilden Water Pump, check for excessive moisture in the compressed air. Consider installing a dryer or hot air generator for the compressed air. Alternatively, a coalescing filter may be used to remove water from the compressed air in some applications.
N
Nicole HenryNov 1, 2025
How to troubleshoot a Wilden Water Pump that won't run or runs slowly?
- M
  Madison MurphyNov 1, 2025
  If your Wilden Water Pump will not run or runs slowly, several issues could be the cause. First, ensure the air inlet pressure is at least 0.3 Bar (5 psig) above startup pressure and that the differential pressure is not less than 0.7 Bar (10 psig). Second, inspect the air inlet filter for any obstructions. Third, check for significant air leakage, which may indicate worn seals or bores in the air valve, pilot spool, or main shaft. Fourth, disassemble the pump to inspect for obstructions in the air passageways or any objects hindering the movement of internal parts. Fifth, if the material being pumped is incompatible with the pump elastomers, swelling may occur, so check for sticking ball check valves and replace them with proper elastomers. Also, worn check valve balls can become stuck in...

Summary

Section 1 CAUTIONS-READ FIRST!

General Safety and Operational Cautions

Critical warnings regarding pump operation, air supply, and component safety during use.

Material and Temperature Considerations

Static Electricity Prevention

Essential precautions for preventing static sparking when handling flammable fluids.

Maintenance and Installation Safety

Safety measures for pump maintenance, disassembly, and hardware installation.

Section 5 PERFORMANCE

Pro-Flo X Operating Principal and EMS

EMS Curve Usage Examples

Section 6 SUGGESTED INSTALLATION, OPERATION, AND MAINTENANCE

Suggested Installation Guidelines

Suggested Operation and Maintenance

Guidelines for pump operation, maintenance, troubleshooting, and inspections.

Section 7 PUMP DISASSEMBLY AND REASSEMBLY

Pump Disassembly Procedure

Step-by-step instructions for disassembling the main pump components.

Air Valve;Center Section Disassembly

Reassembly and Gasket Installation

Tips for reassembly, torque specifications, shaft seal installation, and gasket kits.

Section 8 EXPLODED VIEW AND PARTS LISTING

P4 Metal Pump Components

PX4 Metal Pump Components

WARRANTY

Warranty Registration Process

Warranty Coverage and Exclusions

Details of the pump warranty, including period, coverage, and limitations.

Wilden P4 series Specifications

General

Max. Pressure	125 psi (8.6 bar)
Pump Type	Air-Operated Double-Diaphragm (AODD)
Materials	Aluminum, Stainless Steel, Cast Iron
Diaphragm Materials	Buna-N, EPDM, PTFE
Air Consumption	Varies with flow rate and pressure; see performance curves

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