Emerson SAPAG 8490 Series Manuals

Manuals and User Guides for Emerson SAPAG 8490 Series. We have 1 Emerson SAPAG 8490 Series manual available for free PDF download: Installation And Maintenance Instruction

Emerson SAPAG 8490 Series Installation And Maintenance Instruction

Emerson SAPAG 8490 Series Installation And Maintenance Instruction (16 pages)

Safety valves

Brand: Emerson | Category: Control Unit | Size: 0.9 MB

Table of Contents

Table of Contents
1
1 Introduction

4
2 Storage and Handling

4
3 Installation

4
- Care in Handling
  4
- Inspection
  4
- Inlet Piping
  4
- Outlet Piping
  5
4 Hydrostatic Pressure Tests

5
- Hydrostatic Test of Vessel or System
  5
- Hydrostatic Test of Outlet System
  5
5 Setting, Testing and Adjustments

5
- New Valves
  5
- Reconditioned Valves
  5
- Valves Removed from Service
  5
- The Test Bench
  6
- Test Fluids
  6
- Valve Operation
  6
- Set Pressure Changes
  6
- Set Pressure Adjustment
  6
- Nozzle Ring Settings
  6
- Cold Differential Test Pressure Adjustments
  7
- Temperature Correction
  7
- Back Pressure Correction
  7
- Seat Leakage Tests
  8
- Metal-To-Metal Seated Valves
  8
- Soft Seated Valves
  8
6 Valve Maintenance

9
- Visual Inspection and Neutralizing
  9
- Disassembly
  9
- Cleaning
  10
- Inspection
  10
- Reconditioning of Valve Seats
  10
- Lapping Procedures
  10
- Lapping Blocks
  11
- Lapping Compounds
  11
- Machining of Nozzle Seats
  11
- Machining of Disc Insert Seats
  11
- Assembly
  12
- Assembly of Cap and Lifting Lever Devices
  14
- Soft Seat Construction
  14
7 Style Variations

15
8 Service Records

15
9 Spare Parts

15
10 Trouble Shooting Pressure Relief Valves

15
- Seat Leakage
  15
- Seats Damaged by Foreign Matter
  15
- Distortion from Piping Strains
  16
- Operating Pressure too Close to Set Pressure
  16
- Chatter
  16
- Incorrectly Adjusting Lifting Gear
  16
- Other Causes of Seat Leakage
  16
- Corrosion
  16

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