Emerson Tartarini PRX Series - User Manual

PRX Series
D103231X012
Instruction Manual
Form 5862
October 2015
www.tartarini-naturalgas.com
PRX Series Pilots for Pilot-Operated Pressure
Reducing Regulators
Introduction
Scope of the Manual
This manual provides installation, startup, maintenance and
parts ordering information for the PRX Series pilots and
Type SA/2 filter used together with Pilot-Operated Pressure
Reducing Regulators for high pressure applications.
For information on mounting on Pilot-operated Regulators,
monitoring systems and installations, refer to full
product literature:
Type EZH: D103077X012
Type EZR: D102600X012
Type FL: D103068X012
Product Description
The PRX Series pilots are mainly used in natural gas, air or
other non-corrosive gas applications. They have a double
diaphragm which provides increased accuracy and sensitivity,
an integral damper screw to adjust opening and closing
speeds and a restrictor screw to adjust pilot gain.
The PRX Series pilots can be also be used in other
applications such as relief valve or backpressure regulators
and as a quick dump pilot.
Furthermore, PRX Series pilots have the ability to handle
a wide range of setpoints, from 14.5 to 1160 psig / 1.00 to
80.0 bar.
Type SA/2 Pilot Supply Filter Regulator
The PRX Series pilots are usually used together with the
Type SA/2 pilot supply filter regulator. The Type SA/2
provides a constant supply pressure to the PRX Series pilot
that is approximately 45 psi / 3.1 bar over set pressure. The
Type SA/2 has an integral 5 micron filter.
TYPE PRX-120 TYPE PRX-120/AP TYPE PRX-182
W8346
W8348
P1666
Figure 1. PRX Series Pressure Reducing Pilots

Emerson Tartarini PRX Series Specifications

General

Type	Pressure Regulator
Housing Material	Aluminum
Application	Gas pressure regulation
Accuracy	±5%
Operating Temperature	-20°C to +60°C
Connection Size	1/2" to 2"
Connection Type	Threaded or flanged
Materials	Aluminum, stainless steel
Input Voltage	N/A (Mechanical device)

Summary

PRX Series Technical Specifications

Key Technical Specifications

Lists pressure, accuracy, temperature, and flow coefficient data.

PRX Series Pilot Configurations and Operation

Available PRX Pilot Configurations

Describes various PRX pilot models and their specific uses.

PRX Pilot Principle of Operation

Explains how different PRX pilot types function in regulator systems.

Pilot Adjustment and Installation Overview

Covers initial setup, adjustment methods, and installation precautions.

Installation and Startup Procedures for PRX Pilots

Critical Installation Safety Warnings

Highlights essential safety precautions and potential hazards during installation.

Startup Procedures and Pressure Handling

Pilot Adjustment and Maintenance Procedures

PRX;120 and PRX;125 Pilot Adjustment

Step-by-step guide to adjusting the setpoint on specific pilot models.

Restrictor and Damper Screw Tuning

Pilot Shutdown and General Maintenance

Detailed Maintenance for PRX Pilot Components

Lower Case Maintenance and Disassembly

Upper Case Maintenance and Reassembly

Specific Component and Model Maintenance

Diaphragm Service and SA;2 Filter Maintenance

Diaphragm Replacement Procedures

Type SA;2 Pilot Supply Filter Regulator Service