Flowserve Nordstrom Dynamic Balance Plug Valve and Double DB Plug Valve User Manual
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Contents
1 Valve Selection
4
1.1 Introduction
4
1.2 Pressure-Temperature Rating
4
1.3 Bending Strength
4
1.4 Fire Safety
4
1.5 Pressure Surge
5
1.6 Throttling Service
5
1.7 Temperature Changes
5
1.8 Other Pressurization
5
1.9 Trapped Pressure
5
1.10 Material Compatibility
5
1.11 Operating Effort
6
2 Shipping And Storage
6
2.1 Introduction
6
2.2 Handling
6
2.3 Storage
6
3 Installation
6
3.1 Introduction
6
3.2 Inspection
6
3.3 Threaded Valve to Pipe Assembly
7
3.4 Flanged Joint Assembly
7
3.5 Weld Joint Assembly
8
3.6 Proprietary End Connection Assembly
8
3.7 Testing and Adjustment
9
4 Operation And Maintenance
9
4.1 Introduction
9
4.2 Operation, Manual Valves
9
4.3 Operation, Power-Actuated Valves
9
4.4 Fluid Dynamics of Shutoff Valve Operation
10
4.5 Noise
10
4.6 Maintenance
11
5 Dynamic Balance Plug Valve Maintenance
11
5.1 Notice
11
5.2 Customer Service
11
5.3 Field Service
11
5.4 When You Call or Write Us
12
5.5 Product Identification
12
5.6 Economics of Valve Repair
12
5.7 Video Training
13
5.8 Introduction
13
5.9 Earlier Designs
13
5.10 Basic Construction Principles
13
5.11 Sealant System
14
5.12 Design Features
14
5.13 Valve Front Identification
15
5.14 Gearing
15
5.15 Sealants
15
5.16 VXX Valve Purge
15
5.17 Sealant Injection Equipment
15
5.18 Valve Maintenance
16
5.19 Basic Sealant Injection
16
6 Valve Maintenance: Troubleshooting
17