Groth 1721B User Manual Page 1

IOM-1721B REV. A 12541 Ref. ID: 95729 ©2010 Groth Corporation Installation, Operation and Maintenance Manual

Page 10 of 18 MODEL INFORMATION The nameplate on the Valve contains the Model Number, Serial Number, set pressures and flow capacity at a specified

Page 11 of 18 APPENDIX A: Groth Model 1721B Pressure/Vacuum Relief Valve

Page 12 of 18 Groth Model 1721B Pressure/Vacuum Relief Valve Bill of Material ITEM DESCRIPTION STANDARD MATERIALS OF CONSTRUCTION

Page 13 of 18 APPENDIX B: Groth Model 1722B Pressure/Vacuum Relief Valve

Page 14 of 18 Groth Model 1722B Pressure/Vacuum Relief Valve Bill of Material ITEM DESCRIPTION STANDARD MATERIALS OF CONSTRUCTION

Page 15 of 18 APPENDIX C: Groth Model 1723A Pressure/Vacuum Relief Valve

Page 16 of 18 Groth Model 1723A Pressure/Vacuum Relief Valve Bill of Material ITEM DESCRIPTION STANDARD MATERIALS OF CONSTRUCTION

Page 17 of 18 APPENDIX D: Groth Model 1761A Pressure/Vacuum Relief Valve

Page 18 of 18 Groth Model 1761A Pressure/Vacuum Relief Valve Bill of Material ITEM DESCRIPTION STANDARD MATERIALS OF CONSTRUCTION

Page 2 of 18 TABLE OF CONTENTS I. INTRODUCTION 3 II. DESIGN, FUNCTION & OPERATION 4 1. FIGURE 1 – TYPICAL TANK INSTALLATION 4 III. GENER

Page 3 of 18 DESIGN, FUNCTION & OPERATION Pressure Relief: As the pressure in the storage tank increases the vacuum pallet is held shut. When t

Page 4 of 18 GENERAL SAFETY INSTRUCTIONS This section is an overview of safety guidelines that should be followed during the installation, operation

Page 5 of 18 INSPECTION AND INSTALLATION The pressure/vacuum relief valve is carefully packaged to prevent damage or contamination during shipping.

Page 6 of 18 PREVENTIVE MAINTENANCE Groth Corporation recommends that all service performed on a pressure/vacuum relief valve be done at the factory

Page 7 of 18 DISASSEMBLY WEIGHT LOADED PALLET ASSEMBLY 1. Loosen and remove all hex nuts and washers. 2. Remove the vent cover or weatherhood from

Page 8 of 18 SPRING LOADED PALLET ASSEMBLY 1. Remove cap and hex jam nut. 2. Carefully measure and record the distance from the top of the adjustm

Page 9 of 18 19 TESTING AND SETTING PROCEDURE 1. Before starting to reassemble a valve, calculate the nominal pressure and vacuum pallet assembly we