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Summary of Contents for Groth 2050A
- Page 1 Installation, Operation and Maintenance Manual for Emergency Relief Valve Models 2000A, 2050A, 2400A, 2450A IOM2000A.4 Rev. A 12541 © 2008 Groth Corporation...
- Page 2 PRODUCT LIMITED WARRANTY INTRODUCTION: Groth’s Emergency Relief Valve (ERV) is designed to provide emergency relief capacity beyond that furnished by the normal operating pressure relief valve on the tank. They are used on liquid storage tanks and other process vessels or systems to prevent structural damage due to excess internal pressure or vacuum that could result under emergency situations due to fire exposure or failure of the inert gas blanketing system.
- Page 3 DESIGN, FUNCTION & OPERATION The 2000A Series was designed as a cost effective valve that would protect a tank by providing emergency pressure relief caused by fire or other factors that could make the pressure rise. Groth manufactures four models in this series [Table 1] for pressure relief; two models also provide vacuum relief.
- Page 4 This section is an overview of safety guidelines that should be followed during the installation, operation and maintenance of Groth Pressure / Vacuum Relief Valves. To understand the context of these instructions and warnings, it is necessary to completely read and understand the contents of this manual.
- Page 5 The 2000A Series Emergency Relief Valve is a device that must be handled carefully to ensure seat tightness. The body is manufactured from thin steel plate material and can be damaged by over-tightening the studs or mounting on a tank nozzle that is not flat.
- Page 6 PREVENTIVE MAINTENANCE The 2000A Series valves do not require routine lubrication or adjustments, but should be checked periodically, at least twice a year, to confirm that the valve is functioning properly. Because these valves provide emergency protection, they will not normally cycle in service. Inspection of seat tightness should be done to ensure compliance with local air pollution control requirements as needed.
- Page 7 MODEL 2000A DISASSEMBLY & ASSEMBLY ITEM DESCRIPTION ITEM DESCRIPTION Body Hex Nut, 3/4"-10 UNC Pallet Washer, 3/4", PTFE Retainer Plate Diaphragm Flat Washer, 3/4", SS Hex Bolt, 3/4"-10 UNC Ground Cable Weight Plate(s)* Sleeve Eye Nut* * Not used on valves with low settings 2000A Disassembly 1.
- Page 8 MODEL 2050A DISASSEMBLY & ASSEMBLY ITEM DESCRIPTION ITEM DESCRIPTION Body Stem Guide Pallet – Pressure Seat – Vacuum Retainer Plate – Pressure Hex Bolt, 3/8"-16 UNC Flat Washer, 3/8", SS Flat Washer, 3/8", SS Ground Cable Hex Nut, 3/8"-16 UNC Sleeve Lock Washer, 3/8"...
- Page 9 nut from the stem. Slowly raise the spring button to release the spring compression. The spring force will be in 5 – 30 lb range, depending on vacuum setting. 6. Using weight plate handles, if included, lift pressure pallet [2] with attached assembly and remove vacuum pallet-stem [23, 14] assembly from the bottom.
- Page 10 Figure 9: Exploded View of Pallet Assembly (Upside Down) 5. Apply PTFE sealant tape around the inside hole pattern of the vacuum seat [18] (Figure 10). Tape should be at least 1/16” thick. Note: Other sealants (such as Silicone) can replace the fluoropolymer tape if compatible with tank products.
- Page 11 16. Place spring [31] over the stem [14]. Use the spring button [16] to compress the spring [31]. Insert nuts [15] and tighten. Compress the spring using the lower nut [15] until the “A” dimension is achieved. WARNING Failure to properly set a spring loaded valve can result in improper valve operation and can cause tank damage. 17.
- Page 12 MODEL 2400A DISASSEMBLY & ASSEMBLY ITEM DESCRIPTION ITEM DESCRIPTION Body Diaphragm Pallet Washer, 3/8", PTFE Retainer Plate Hex Nut, 3/4"-10 UNC Hinge Arm Lock Washer, 3/4" Hinge Pin Hex Bolt, 3/4"-10 UNC Cotter Pin Hex Bolt, 3/8"-16 UNC Hex Nut, 3/8"-16 UNC Weight Plate* Lock Washer, 3/8"...
- Page 13 MODEL 2450A DISASSEMBLY & ASSEMBLY ITEM DESCRIPTION ITEM DESCRIPTION Body Stem Guide Pallet – Pressure Seat – Vacuum Retainer Plate – Pressure Hex Bolt, 3/8-16 UNC Hinge Arm Flat Washer, 3/8", SS Hinge Pin Hex Nut, 3/8-16 UNC Cotter Pin Lock Washer, 3/8"...
- Page 14 second nut from the stem. Slowly raise the spring button to release the spring compression. The spring force will be in 5 – 30 lb range, depending on vacuum setting. 7. Using weight plate handles, if included, lift pallet [2] with attached assembly and remove vacuum pallet- stem [23, 14] assembly from the bottom.
- Page 15 Fluoropolymer Washer Fluoropolymer Washer Figure 16: Exploded View of Pallet Assembly (Upside Down) 4. Place retainer plate [3], align with pallet hole pattern. 5. Apply PTFE sealant tape around the inside hole pattern of the vacuum seat [18] (Figure 17). Tape should be at least 1/16”...
- Page 16 16. If pallet assembly is high enough from the table, insert vacuum pallet-stem [23, 24, 14] assembly from beneath. Place a short length of pipe (minimum 6” high) beneath the vacuum assembly to hold it in place until the spring is installed. 17.
- Page 17 Slowly increase the vessel pressure by flowing at 20 SCFH through a flowmeter. Record peak pressure attained, this pressure is the seat leakage pressure (as recorded on the original test report supplied by Groth Corporation at the time of order). Next increase the flow to the test tank (increasing the pressure) until an increase in flow to the test tank does not cause an increase in pressure in the tank.
- Page 18 Any such modifications or changes to products sold by Groth hereunder shall make the product limited warranty null and void. Groth shall be under no obligation to manufacture, sell or supply, or to continue to manufacture, sell, or supply any of the products.
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