Spirax Sarco DP143 User Manual

IM-P006-07 CTLS Issue 12
1
1. Safety information
2. General product information
3. Installation
4. Commissioning
5. Maintenance
6. Spare parts
7. Fault finding
© Copyright 2018
Printed in GB
0060026/12
DP143, DP143G, DP143H
and DP163, DP163G, DP163Y
Pilot Operated Pressure Reducing Valves
Installation and Maintenance Instructions
IM-P006-07
CTLS Issue 12

Spirax Sarco DP143 Specifications

General

Brand	Spirax Sarco
Model	DP143
Category	Control Unit
Language	English

Summary

Safety Information

Intended Use and General Precautions

Details product's intended use and essential safety precautions for operation.

Hazard Identification

Identifies potential hazards in the pipeline and surrounding environment during operation.

Personal Protection and Procedures

Outlines required protective clothing and work permit procedures for safe operation.

Installation

Safety Valve

Commissioning

Start-up (Setting the Valve)

Step-by-step procedure for setting the pressure reducing valve during initial start-up.

Maintenance

Routine Maintenance

Recommended schedule and parts for routine valve overhaul and maintenance.

Diaphragms and Cleaning

Renewing Pilot Valve Assembly and Bellows Seal

Renewing Pilot Valve Diaphragms

Renewing Main Diaphragms

Servicing Main Valve and Seat

Procedure for servicing or replacing the main valve and its seat for optimal function.

Fault Finding

Downstream Pressure Zero or Too Low

Troubleshooting steps for when the downstream pressure is not reaching the set point.

Downstream Pressure Too High

Troubleshooting steps for when the downstream pressure exceeds the set point.

Hunting

Diagnosing and resolving issues related to valve hunting or unstable pressure control.