PERSTA 640 AA User manual

Swing check valves

640 AA / 640 AE

Operating instructions

Read the instructions prior to performing any task!

Dok.-Nr. 6416.DE.STD.06.2015, 3, 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

20.05.2021Swing check valves 640 AA / 640 AE2

These instructions enable the safe and efficient handling of the

valve.

The instructions are an integral part of the valve and must be kept

in the vicinity of the valve so that they are available to the per-

sonnel at all times.

The personnel must have carefully read and understood these

instructions before performing any tasks. The basic prerequisite for

safe work is compliance with all the specified safety and handling

instructions.

Furthermore, the local occupational safety regulations and general

safety requirements must be complied with for the area in which

the valve is used.

The figures in these instructions 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.

These instructions apply to the following versions of the 640 AA

series of the swing check valve:

Series Nominal diam-

eter (DN) [mm]

Pressure rate Class*

640 AA/AE 50–250 PN 40 -

640 AA/AE 50–300/250 PD 18 900

640 AA/AE 300–500 PN 100 -

640 AA/AE 300–1000 PN 10 - PN 63 -

* 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

instructions

Scope of the document

Other applicable documents

Supplemental directives

20.05.2021 Swing check valves 640 AA / 640 AE 3

Mülheimer Str. 18

59581 Warstein

Germany

Phone: +49 2902 762-900

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

20.05.2021Swing check valves 640 AA / 640 AE4

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 dangers................................................. 14

2.4.3 Thermal hazards...................................................... 14

2.4.4 Dangers due to hazardous substances and oper-

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

2.5 Behaviour in the event of an emergency.................... 17

2.6 Responsibility of the operating company.................... 17

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

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

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

2.10 Environmental protection.......................................... 23

3 Functional description..................................................... 25

3.1 How the swing check valve works.............................. 25

3.2 Attachment of the swing check plate (type-specific)... 26

3.3 Optional equipment..................................................... 28

3.4 External seal............................................................... 31

3.5 Connections................................................................ 32

4 Transport and storage...................................................... 33

4.1 Safety notices for transport and storage..................... 33

4.2 Transport of packed items.......................................... 34

4.3 Storage of the valve.................................................... 36

4.4 Storage of spare parts................................................ 36

5 Installation......................................................................... 37

5.1 Safety instructions for installation............................... 37

5.2 Before the installation................................................. 38

5.3 Installing the valve...................................................... 39

5.4 After the installation.................................................... 40

5.4.1 Pickling the valve..................................................... 41

5.4.2 Painting the valve.................................................... 41

5.4.3 Executing the system pressure test and leak test... 41

5.4.4 Applying thermal insulation...................................... 42

5.4.5 Setting the closing support (optional)...................... 43

6 Commissioning................................................................. 47

6.1 Safety instructions for commissioning........................ 47

6.2 Prior to commissioning............................................... 49

6.3 Performing the commissioning process...................... 49

Table of contents

20.05.2021 Swing check valves 640 AA / 640 AE 5

7 Maintenance...................................................................... 51

7.1 Safety instructions for maintenance............................ 51

7.2 Maintenance schedule................................................ 55

7.3 Visually checking the valve......................................... 55

7.4 After maintenance....................................................... 56

8 Faults and fault correction............................................... 57

8.1 Safety instructions for fault correction......................... 57

8.2 Fault table................................................................... 59

8.3 Fault correction work.................................................. 61

8.3.1 Replacing the body cover gasket............................. 61

8.3.2 Detaching and attaching the swing check plate....... 64

8.3.3 Replacing the gland packing.................................... 75

9 Removal, disposal............................................................ 83

9.1 Safety instructions for dismantling.............................. 83

9.2 Removal...................................................................... 85

9.3 Disposal...................................................................... 86

10 Index................................................................................... 87

Table of contents

20.05.2021Swing check valves 640 AA / 640 AE6

1 Overview

Fig. 1: Swing check valve

The valve referred to as swing check valve has been designed for

installation in pipes.

By using the swing check valve, a medium is only permitted to flow

in one direction within the pipe.

From the other direction, the swing check plate (Fig. 1/1) within the

valve is pressed into its seat by the medium flowing back and the

return flow is thereby prevented.

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

ating instructions:

Forklift

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

Brief description of the 640 AA

swing check valve

Tools

Overview

20.05.2021 Swing check valves 640 AA / 640 AE 7

Hoist

Hoist with sufficient load-bearing capacity for transporting valves

and components.

Knock-out tool

Pin-like tool for driving the valve shaft out of the body.

Packing extractor

Tool for removing gland packing elements.

Ring bolts

nFor installation in the body cover

nDepending on the version, additionally for installation in the disc

lever.

nThey serve as attachment points of the valve to 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.

Snap ring pliers

Tool for fitting and removing snap rings.

Tools for machining sealing surfaces and slide faces

Grinding tools, such as fine emery cloth, plastic or wooden tools.

Overview

20.05.2021Swing check valves 640 AA / 640 AE8

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!