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SCUBA REGULATOR MAINTENANCE AND REPAIR

CONTENTS

Introduction

Chapter 1 How A Regulator Works
Demand Regulators - Ambient Compensation - Some Nomenclature - Upstream or Downstream - Diaphragm vs Piston - Second Stages - Balancing - Venturi Assist - Navy and CEN Tests - Gimmicks -Subtleties

Chapter 2 Getting Started
Overview - Warnings - More Nomenclature

Chapter 3 First Stage Overhaul
Non-Balanced Pistons - Balanced Pistons - Balanced Diaphragms

Chapter 4 Second Stage Overhaul
Basic Downstreams - Barrel Poppets - Servo Valve - Tilt Valve - Others

Chapter 5 Tuning The Regulator
Overview - Single Adjustment - Two Adjustment - First Stages - Fine Points

Chapter 6 Procedures and Techniques
Pre-Servicing Checks - Loosening Stuck Parts - Cleaning -Inspection - Lubrication - Tightening Things - Intermediate Pressure - Cold Water Kits - Cracking Pressure - Flow Testing -Final Testing - Routine Maintenance

Chapter 7 Servicing Regulator Components
Inlet Filters -Snap and Lock Rings - HP and LP Seats - Orifice Blocks - Balance Chambers - Purge Assemblies - Exhaust Valves - Soft Parts - Cold Water Kits - Plastic - Hoses - Yoke and Din Connectors - Dust Caps

Chapter 8 O-rings And Other Seals
Static or Dynamic? - Care and Handling - Lubrication - Material Specifications - Buying O-rings - Sizing O-rings - O-rings for Oxygen Service - Packing Seals and Gaskets

Chapter 9 Tools
Tools - Test Equipment - Chemicals

Chapter 10 Diagnosis
Charts - Discussion - "None Of The Above"

Chapter 11 Valves, Tanks And Gauges
Removing Valves - Diagnosis - Overhaul Procedure - Burst Disks - Tanks - Visual Inspection - Neck Cracks - Hydrotesting and Tumbling - Gauges

Chapter 12 Servicing Regulators In A Non-Shop Environment
Obtaining Parts - Service Literature - Other Sources of Information - Recalls - Manufacturers Tech Courses

Chapter 13 Regulators By Make
Abysmal - Apeks - Atomic - Dacor - Dive Rite - Genesis - Oceanic - Mares - Poseidon - Scubapro - Sherwood - Spiro - Zeagle - Torque Specifications

Appendices
1 - Glossary
2 - Sources
3 - SCUBA Regulator Manufacturers
4 - Buying A Regulator
5 - NPT to SCUBA Straight Thread Adaptors

Schematics

First Stages
1. Apeks
2. Atomic
3. Dacor 960
4. Genesis DAD
5. Modular Dacor
6. Sherwood
7. Mares MR 22
8. Poseidon Odin/Jetstream/Cyclon
9. Poseidon XStream
10. Spiro SEA
11. Scubapro Mk 5/10, Oceanic BP and Copies
12. Scubapro Mk14/16/18
13. Scubapro Mk 20/25
14. Seaquest Mirage NBP
15.Oceanic Sport NBP

Second Stages
1. Apeks
2. Atomic
3. Mares Ruby/Abyss/Voltrex
4. Poseidon Jetstream/Odin
5. Scubapro G1903.
6. SP 500, 550, 600
7. SP G250, G200, BA and 109
8. Sherwood
9. Spiro Basic Downstreams
10. Oceanic Delta2
11. USD/Aqualung Micra/Micra Adj.

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