Summary of Contents for Continental Disc Corporation GROTH 3020A
- Page 1 Installation, Operation and Maintenance Manual for Model 3020A Blanket Gas Regulators IOM-3020A Rev. IR Ref. I.D. 101078 © 2008 Groth Corporation...
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Page 2: Table Of Contents
TABLE OF CONTENTS: INTRODUCTION: DESIGN, FUNCTION & OPERATION TABLE 1: MODEL 3020A SPECIFICATIONS GENERAL SAFETY INSTRUCTIONS SAFETY WARNINGS INSPECTION AND INSTALLATION MODEL SELECTION AND PRESSURE SETTING TABLE 4 – RATED FLOW CAPACITY TABLE 5 –ORIFICE SLEEVE POSITION AND RATED FLOW CAPACITY MULTIPLIER BLANKETING THE TANK TROUBLESHOOTING GUIDE PREVENTIVE MAINTENANCE... -
Page 3: Introduction
INTRODUCTION: The blanket gas regulator (hereafter referred to as “BGR”) is one of the principal components typically installed on a storage tank to protect the tank and its contents. It is a precision regulator that is capable of maintaining a very low gas pressure (2.0 psig to 15 psig for 1”... - Page 4 Figure 1: MODEL 3020A - SHUT-OFF CONDITION Figure 2: MODEL 3020A - FLOWING CONDITION...
- Page 5 The regulator must be sized to provide sufficient blanket gas to prevent the loss of tank pressure due to liquid discharge or decreased ambient temperature. Table 4 lists the maximum flow capacity of the regulator for various blanketing gases. Actual system flow will depend on supply system piping, tank connection piping and position of the internal orifice sleeve.
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Page 6: General Safety Instructions
GENERAL SAFETY INSTRUCTIONS This section is intended as an overview of safety guidelines that should be followed during the installation, operation and maintenance of the Groth model 3020A Blanket Gas Regulators. To understand the context of these warnings and instructions, read and understand this complete manual. -
Page 7: Inspection And Installation
INSPECTION AND INSTALLATION The regulator is packaged and supported to prevent damage or contamination in shipping. It should be similarly protected during subsequent handling and storage. Always keep all ports plugged to prevent intrusion of foreign materials. Before installation, visually inspect the unit. If there are indications of physical damage or internal contamination, the regulator must be disassembled, cleaned and inspected before installation. -
Page 8: Model Selection And Pressure Setting
MODEL SELECTION AND PRESSURE SETTING Model selection is based on a combination of set pressure and supply pressure as shown in Figure 4. The regulator may be set at the factory or on the tank or vessel when initially introducing blanketing gas. A pressure gauge (or manometer) is required to indicate the tank pressure. -
Page 9: Blanketing The Tank
TABLE 4 – RATED FLOW CAPACITY Table 1 shows flow capacity for a regulator set at 100% full open. Unless otherwise specified, the orifice selector sleeve [12] is factory set at the 100% full open position. Table 1: FLOW CAPACITY If reduced capacity is specified on an order, the sleeve is set at the appropriate restriction. -
Page 10: Troubleshooting Guide
TROUBLESHOOTING GUIDE PROBLEM INSPECTION SUGGESTED CORRECTIVE ACTION Gas flowing at tank pressure Flow indicator in blanket Damaged seat, o-ring or diaphragm or pressure setting too high. If above specified set gas line. original pressure setting has not been disturbed, remove point. -
Page 11: Disassembly
WARNING: Diaphragm actuator housing and regulator body are exposed to the process vapor(s). Observe all standard safety precautions as specified on Material DISASSEMBLY Safety Data Sheets for the product(s) that are in the tank. These precautions apply both during removal of WARNING: Before removing the regulator from the tank for the regulator from the tank and while repairing it. -
Page 12: Assembly
FIGURE 6: EXPLODED PISTON ASSEMBLY Refer to Table 5 and warnings on Page 7 before removing the orifice selector sleeve [12] from the body. Back the locking screw [13] completely out of the Body. Before Clean and inspect the sleeve, body cavity and seat. Polish or lap the seat if required to obtain a sharp but smooth seating edge for the O-ring. - Page 13 TABLE 7 – RECOMMENDED BOLT TORQUE TABLE 7 RECOMMENDED BOLT TORQUE [FT. - LB.] Bolt Size 5/16 7/16 Torque All screw threads and static O-rings should be lightly greased with silicone grease. Lubricate the piston OD at both ends and the spring adjusting screw with an anti-galling spray.
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Page 14: Testing And Setting Procedure
Inspect and clean all diaphragm, gasket and seating rigidly to the regulator unless the flow meter is rated surfaces before assembling the actuator housing. Position for full air supply pressure. the upper housing [4] on the body and secure with (2) hex bolts [28] &... - Page 15 FIGURE 12: CROSS SECTIONAL ASSEMBLY...
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Page 17: How To Order
The nameplate on the Groth Model 3020A Tank Blanketing Regulator contains the model number, serial number, set pressure & range and supply pressure. The model number contains additional information about material of construction, capacity and options. The following chart will assist in relating the model number to the specifications of your regulator: HOW TO ORDER EXAMPLE 2 0 A - N - 5 - V - 1 - 5 - 0... -
Page 18: Product Limited Warranty
PRODUCT LIMITED WARRANTY Only Groth’s Product Limited Warranty terms apply to purchase orders accepted by Groth Corporation. A. Seller warrants that products that are manufactured by Seller are manufactured in accordance with published specifications and free from defects in materials and/or workmanship for a period of (12) twelve months. Seller, at its option, will repair or replace any products returned intact to the factory, transportation charges prepaid, which Seller, upon inspection, determines to be defective in material and/or workmanship.
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