Emerson CROSBY STYLE JQ Installation And Maintenance Instructions Manual

CROSBY STYLE JQ 4 IN. PRESSURE RELIEF VALVE
INSTALLATION AND MAINTENANCE INSTRUCTIONS
Before installation, these instructions must be carefully read and understood.

TABLE OF CONTENTS

1. PRODUCT SAEFTY SIGN AND
LABEL SYSTEM . . . . . . . . . . . . . . . . . . . 2
2. INTRODUCTION . . . . . . . . . . . . . . . . . . . 3
2.1 Purpose . . . . . . . . . . . . . . . . . . . . . . . . 3
2.2 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.3 Definitions . . . . . . . . . . . . . . . . . . . . . . . 3
2.4 Disclaimer. . . . . . . . . . . . . . . . . . . . . . . 3
2.5 Approvals . . . . . . . . . . . . . . . . . . . . . . . 3
2.6 Revisions . . . . . . . . . . . . . . . . . . . . . . . 3
2.7 Reproduction . . . . . . . . . . . . . . . . . . . . 3
3. GENERAL INFORMATION . . . . . . . . . . . . 4
3.1 Functional Description . . . . . . . . . . . . . . 4
3.2 Valve Performance Data . . . . . . . . . . . . 4
3.3 Identification and Records . . . . . . . . . . . 4
3.4 Alterations. . . . . . . . . . . . . . . . . . . . . . . 4
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4. INSTALLATION. . . . . . . . . . . . . . . . . . . . 4
4.1 Care in Handling . . . . . . . . . . . . . . . . . . 4
4.2 Inspection . . . . . . . . . . . . . . . . . . . . . . . 4
4.3 Inlet Piping . . . . . . . . . . . . . . . . . . . . . . 4
5. PERTINENT REGULATIONS . . . . . . . . . . 4
5.1 DOT Regulations . . . . . . . . . . . . . . . . . . 4
5.2 TC Regulations . . . . . . . . . . . . . . . . . . . 4
6. PARTS, TOOLS AND SUPPLIES. . . . . . . . 5
6.1 Safety Valve Proper . . . . . . . . . . . . . . . . 5
6.2 Breaking Pin Assembly . . . . . . . . . . . . . 6
6.3 Installation Parts. . . . . . . . . . . . . . . . . . 6
6.4 Tools and Test Equipment . . . . . . . . . . . 6
6.5 Test Equipment . . . . . . . . . . . . . . . . . . . 6
7. PREPARATION FOR TEST . . . . . . . . . . . . 6
7.1 Frequency . . . . . . . . . . . . . . . . . . . . . . . 6
7.2 Safety Precautions . . . . . . . . . . . . . . . . . 6
7.3 Removal of Valve from Tank . . . . . . . . . . 6
7.4 Visual Inspection . . . . . . . . . . . . . . . . . . 6
7.5 Removal of Breaking Pin Assembly
from Safety Valve Proper . . . . . . . . . . . . 7
8. RECONDITIONING AND TESTING OF
METALLIC SEAT VALVES . . . . . . . . . . . . 7
8.1 Disassembly of Safety Valve for
Initial Inspection . . . . . . . . . . . . . . . . . . 7
8.2 Disassembly of Safety Valve Proper . . . . 7
8.3 Disassembly/Inspection of
Seating Surfaces . . . . . . . . . . . . . . . . . . 7
8.4 Lapping Seating Surfaces . . . . . . . . . . . 7
8.5 Reassembly of Safety Valve Proper . . . . . 8
8.6 Test For Start-to-Discharge
(Set Pressure) . . . . . . . . . . . . . . . . . . . . 9
8.7 Test for Vapor Tightness . . . . . . . . . . . . 9
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9. RECONDITIONING AND TESTING OF
ELASTOMERIC SEAT VALVES . . . . . . . . . 9
9.1 Disassembly of Safety Valve for
Initial Inspection . . . . . . . . . . . . . . . . . . 9
9.2 Required O-ring (10E) Replacement . . . . 9
9.3 Reassembly of the Safety Valve Proper
9.4 Test for Start-To-Discharge
(Set Pressure) . . . . . . . . . . . . . . . . . . . 10
9.5 Test for Vapor Tightness . . . . . . . . . . . 10
10. RECONDITIONING AND TESTING OF
BREAKING PIN ASSEMBLY . . . . . . . . . 10
10.1 Disassembly of the Breaking
Pin Assembly . . . . . . . . . . . . . . . . . . . 10
10.2 Inspection of Breaking Pin Assembly . . 11
10.3 Reassembly of the Breaking
Pin Assembly . . . . . . . . . . . . . . . . . . . 13
10.4 Test the Lower Diaphragm (37)
for Leaks. . . . . . . . . . . . . . . . . . . . . . . 13
11. REASSEMBLY OF SAFETY VALVE
PROPER AND THE BREAKING
PIN ASSEMBLY . . . . . . . . . . . . . . . . . . 14
11.1 Installation of the Breaking
Pin Assembly . . . . . . . . . . . . . . . . . . . 14
11.2 Paint. . . . . . . . . . . . . . . . . . . . . . . . . . 14
11.3 Storage and Handling . . . . . . . . . . . . . 14
12. SPECIAL MAINTENANCE
PROCEDURES. . . . . . . . . . . . . . . . . . . . 14
12.1 Cleaning . . . . . . . . . . . . . . . . . . . . . . . 14
12.2 Converting from Metallic Seat
to Elastomeric Seat Design . . . . . . . . . 14
13. REFERENCES . . . . . . . . . . . . . . . . . . . . 15
13.1 Institute Publications. . . . . . . . . . . . . . 15
13.2 DOT Regulations . . . . . . . . . . . . . . . . . 15
13.3 TC Regulations . . . . . . . . . . . . . . . . . . 15
13.4 Standards . . . . . . . . . . . . . . . . . . . . . . 15
FCIM-20094-EN 24/04
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