Flowserve P3 Series User Manual

Installation
Operation
Maintenance
P3/EP3
Modular Linear Positioner

Flowserve P3 Series Specifications

General

Enclosure Rating	NEMA 4X, IP66
Ambient Temperature Range	-40°C to 85°C (-40°F to 185°F)
Input Signal	3-15 psi
Action	Single Acting or Double Acting
Supply Pressure	20-100 psi
Mounting	Bracket Mounting
Hazardous Area Certification	ATEX, IECEx
Type	Pneumatic

Summary

Introduction to the Flowserve P3/EP3 Positioner

Safety Instruction for Positioner Use

Read safety instructions carefully before using the product. Installation, operation, and maintenance must be done by trained staff.

Product Variants and Options

EP3 Electro-Pneumatic Positioner

EP3EX Explosion Proof Positioner

Explosion proof model with external I/P converter in a sealed enclosure.

Installation Air Supply Requirements

Air Jet Safety Warning

Do not direct open air jet towards people or objects; it can cause personal injury or damage.

Importance of Air Quality

Mounting Procedures per IEC 534-6

Hazardous Environment Mounting Compliance

If installed in a hazardous environment, positioner must be of an approved type for this purpose.

P3/EP3 Mounting Kit 30168S Instructions

Positioner Connections

Air Connection Ports Explained

Electrical Input Connection

Adapting Direct or Reverse Function

Positioner can be adapted by reversing flapper nozzle and changing actuator mounting.

Electrical Connection Details

Hazardous Area Electrical Connection Safety

Electrical connections in hazardous environments must comply with relevant regulations.

Understanding the Model Code

Interpretation of Product Signs

Control Drawing and Electrical Parameters

Positioner Adjustments

Setting the Gain Parameter

Instructions for setting the gain, including default settings and reset procedure.

Adjusting Zero Position and Span

Step-by-step guide to adjust zero position and span for optimal performance.

Positioner Maintenance and Service

Critical Maintenance Precautions

Emphasizes cleanliness, warns against further disassembly, and not taking the valve block apart.

Valve Block Removal and Refitting

Integral I/P Converter Service

Feedback Arm and Spindle Maintenance

Troubleshooting Common Issues

Diagnosing No Actuator Response

Actions to take when input signal changes do not affect actuator position.

Diagnosing End Position Actuator Movement

Actions to take when input signal changes cause actuator to move to its end position.

Diagnosing Inaccurate Positioning

Lists potential causes and actions for inaccurate positioning issues.

Technical Specifications

P3 Model Specifications

EP3 Model Specifications

EP3EX Model Specifications