PERSTA DRI 21 Manuale utente

High pressure swing check valve

DRI

Operating instructions

Read the instructions prior to performing any task!

Dok.-Nr. 6402.DE.STD.03.2013, 2, en_GB

Translation of the original operating instructions

Stahl-Armaturen PERSTA GmbH

Mülheimer Str. 18

59581 Warstein-Belecke, Germany

Telephone: +49 2902 762-02

Fax: +49 2902 767-03

Email: [email protected]

Internet: www.persta.com

20.05.2021High pressure swing check valve DRI2

This manual enables safe and efficient handling of the high pres-

sure valve.

The manual is a component of the high pressure valve and must

be kept in the vicinity of the high pressure valve where it is avail-

able to personnel at all times.

The personnel must have carefully read and understood this

manual before performing any tasks. The basic prerequisite for

safe work is compliance with all the specified safety notices and

instructions.

In addition, the local occupational safety regulations and general

safety regulations must be complied with for the high pressure

valve’s area of use.

The illustrations in this manual are provided as examples only and

may deviate from the actual version.

Although the size and pressure ratings of the valve

types vary, the information in these instructions

applies generally to all valves, provided nothing to

the contrary is specified.

This manual applies to the following versions of the series 640 AB

of the high pressure swing check valve DRI:

Designation Series Nominal

diameter (DN)

[mm]

Pressure rate Class*

DRI 21 640 AB 50–300/250 PD 21 -

DRI 26 640 AB 65–300 PD 25 / PD 40 £2500

DRI 10–63 640 AB 80–600 PD 10–63 £4500

* Assignment number in the pipe construction

nIgnition hazard assessment GA004

nRisk analysis according to Pressure Equipment Directive

nRisk analysis as per the Machinery Directive

nTechnical data sheet

nBolt tightening torques according to the website:

www.persta.com

nAnd other documents included in the delivery

Information about the operating

manual

Scope of the document

Other applicable documents

Supplemental directives

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Mülheimer Str. 18

59581 Warstein

Telephone: +49 2902 762-02

Fax: +49 2902 767-03

E-mail: [email protected]

Revision number Change/Supplemented informa-

tion

Date

1 Updates to chapter

“

Intended

use”.

05/05/2021

Customer Service - Stahl-Arma-

turen PERSTA GmbH

Revision overview

Supplemental directives

20.05.2021High pressure swing check valve DRI4

Table of contents

1 Overview.............................................................................. 7

2 Safety................................................................................... 9

2.1 Symbols in this manual................................................. 9

2.2 Intended use............................................................... 11

2.3 Safety signs................................................................ 12

2.4 Residual risks............................................................. 13

2.4.1 Basic dangers at the workplace............................... 13

2.4.2 Mechanical hazards................................................. 14

2.4.3 Thermal dangers...................................................... 14

2.4.4 Hazards due to hazardous substances and oper-

ating materials......................................................... 15

2.5 Behaviour in the event of an emergency.................... 16

2.6 Responsibility of the operating company.................... 16

2.7 Personnel requirements.............................................. 18

2.8 Personal protective equipment................................... 20

2.9 Spare parts................................................................. 21

2.10 Environmental protection.......................................... 22

3 Functional description..................................................... 23

3.1 Mode of operation of the high pressure swing check

valve........................................................................... 23

3.2 Seal to the outside...................................................... 24

3.3 Connections................................................................ 25

4 Transport and storage...................................................... 27

4.1 Safety notices for transport and storage..................... 27

4.2 Transport of packages................................................ 28

4.3 Storage of the valve.................................................... 30

4.4 Storage of spare parts................................................ 30

5 Installation......................................................................... 31

5.1 Safety notices for installation...................................... 31

5.2 Before the installation................................................. 32

5.3 Installing the valve...................................................... 33

5.4 After the installation.................................................... 33

5.4.1 Pickling the valve..................................................... 34

5.4.2 Painting the valve.................................................... 35

5.4.3 Executing the system pressure test and leak test... 35

5.4.4 Applying thermal insulation...................................... 35

6 Commissioning................................................................. 37

6.1 Safety notices for commissioning............................... 37

6.2 Prior to commissioning............................................... 39

6.3 Executing the commissioning process........................ 39

7 Maintenance...................................................................... 41

7.1 Safety instructions for maintenance............................ 41

Table of contents

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7.2 Maintenance schedule................................................ 44

7.3 Maintenance tasks...................................................... 45

7.3.1 Visually checking the valve...................................... 45

7.3.2 Replacing the gasket of the pressure sealing

bonnet...................................................................... 46

7.4 After maintenance....................................................... 51

8 Faults and fault correction............................................... 53

8.1 Safety notices for fault correction............................... 53

8.2 Fault table................................................................... 55

8.3 Fault correction work.................................................. 57

8.3.1 Dismounting the swing check valve......................... 57

8.3.2 Mounting the swing check valve.............................. 59

9 Dismantling, disposal....................................................... 61

9.1 Safety notice for dismantling and disposal................. 61

9.2 Dismantling................................................................. 63

9.3 Disposal...................................................................... 64

10 Index................................................................................... 65

Table of contents

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1 Overview

Fig. 1: High pressure swing check valve

The valve designated as high pressure swing check valve is

designed for installation in pipes.

By using the high pressure swing check valve the flow of a medium

is allowed in only one direction within the pipe.

In the other direction the closing element (Fig. 1/1) within the valve

is pressed into its seat by the medium flowing back and a return

flow is thereby prevented.

The following tools are required for the tasks described in the oper-

ating manual:

Forklift

Forklift with sufficient load-bearing capacity for transport of valves.

Brief description - high pressure

swing check valve DRI

Tools

Overview

20.05.2021 High pressure swing check valve DRI 7

Hoist

Hoist with sufficient load-bearing capacity for transporting valves

and components.

Pin puncher

Mandrel-like tool for punching out the segment rings.

Pull-off device

Pull-off device for removing the swing check valve from the body

and mounting the swing check valve. The pull-off device grasps

through the retaining ring and lifts the retaining ring with the swing

check valve out of the body from below. For the installation of the

swing check valve the retaining ring with mounted swing element

can be lowered into the housing with the pull-off device.

Ring bolts

nRing bolts to be screwed into the body.

nServe as attachment points of the valve on the hoist.

nIncluded in the scope of delivery of the valve.

Ring nuts

nRing nuts to be screwed onto the stud bolts.

nServe as attachment points of the valve on the hoist.

nIncluded in the scope of delivery of the valve.

Sling gear

Functional and approved gear for attaching valves and compo-

nents on the hoist.

Overview

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2 Safety

2.1 Symbols in this manual

Safety instructions are indicated by symbols in this manual. The

safety instructions are introduced by signal words that indicate the

scope of the hazard.

DANGER!