Spirax Sarco DP163 - 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 DP163 Specifications

General

Brand	Spirax Sarco
Model	DP163
Category	Control Unit
Language	English

Summary

Safety Information

1.1 Intended use

General Product Information

2.1 DP143, DP143 G and DP143 H

Details on DP143, DP143G and DP143H series valves, including description, types, and sizes.

2.2 DP163, DP163 G and DP163 H

Details on DP163, DP163G and DP163H series valves, including description, types, and sizes.

Installation

3.2 Fitting (Figure 2 and Figure 3)

Guidance on valve fitting, including recommended installation diagrams and system notes.

3.11 Safety valve

Requirements for fitting a safety valve to protect downstream equipment from overpressure.

Commissioning

4.1 Start-up (Setting the valve)

Step-by-step procedure for starting up and setting the pressure reducing valve.

Maintenance

5.1 Routine maintenance

Recommendations for periodic overhaul and parts requiring attention.

5.2 Diaphragms and cleaning

5.4 How to renew or change the control spring

5.5 How to renew the pilot valve assembly and bellows seal

Instructions for replacing the pilot valve assembly and bellows seal.

5.7 How to renew the pilot valve diaphragms

5.8 How to renew the main diaphragms

5.9 How to service or renew the main valve and seat

Fault Finding

7.1 Preliminary check

7.2 Downstream pressure zero or too low

Troubleshooting steps for when the downstream pressure is zero or below the set point.

7.3 Downstream pressure too high

Troubleshooting steps for when the downstream pressure is above the set point.

7.4 Hunting

Checks for valve hunting issues, related to steam load variations and installation.