Manual Valvulas De Presion Y Vacio

cioInstallation, Operation and Maintenance
Models 1200A / 1220A / 1260A 1300A / 1360A / 2300A/1720A/1760A WEIGHT LOADED FIBERGLASS VALVES

IOM 1200AFBG.1 MAY 2006

TABLE OF CONTENTS:
DESCRIPTION Introduction Valve Design & Function Safety Warnings Inspection and Storage Installation Maintenance Test Procedure LIST OF FIGURES Fig. 1- Typical Tank Installation Fig. 2- Pressure Relief -Operation Fig. 3- Vacuum Relief - Operation Fig. 4- Required Pallet Clearance Fig. 5- Pallet Assembly Detail - FRP Fig. 6- Pallet Assembly Detail - Kynar Fig. 7- Typical Valve Cross-Section Fig. 8- Model 1200A Valve Fig. 9- Model 1220A Valve Fig. 10- Model 1260A Valve Fig. 11- Model 1300A Valve Fig. 12- Model 1360A Valve Fig. 13- Model 2300A Valve Model Identification Product Limited Warranty LIST OFTABLES Table 1 - Bolt Torque (Installation) Table 2 - Fiberglass Valve Weights Table 3 - Spare Parts P/N Table 4 - Pallet Assembly Weights Table 5 – List of Abbreviations Table 6 – FRP Resin Options PAGE 1 2 3 3 3-4 5-6 7

venting depends upon the tank size, volatility of the tank contents, the pumping rates and the temperature. Refer to API Standard 2000 for the procedures to determine ventingrequirements. Relief valves must be carefully maintained by a qualified valve technician. It should only be assembled under clean conditions, preferably in a service shop environment. Carefully read and understand this manual before installing or attempting to repair a valve. Groth Corporation or a factory authorized repair center offers repair services for all products manufactured by the TankProtection Division. The table below shows the six different valve Models covered in this manual and indicates their Pressure (P) and/or Vacuum (V) relief capabilities. Model 1200A 1220A 1260A/ 1760A 1300A 1360A 2300A P V Description Vent to atmosphere Vent to Header Vent to Header Top mounted Side mounted Vent to atmosphere

2 2 2 5 6 6 6 8 9 10 11 12 13 15 15

4 4 5 6 14 14

For a list ofabbreviations used in this manual, refer to page 14. For information not contained in this manual, please contact: Groth Corporation 13650 N. Promenade Blvd Stafford, Texas, 77477 281-295-6800(Phone) 281-295-6995(Fax) The nameplate below shows the basic information that is listed for each relief valve:

INTRODUCTION:
Pressure and/or vacuum relief valves are used on liquid storage tanks and otherprocess vessels or systems to prevent structural damage due to excess internal pressure or vacuum. Storage tanks are pressurized when liquid is pumped in, compressing the existing vapor or when rising temperatures cause increased evaporation or expansion of existing vapor. Conversely, a vacuum condition may be created when pumping out or due to falling temperature. To prevent tank damage, vapormust be allowed into or out of the tank at specified pressure/vacuum conditions. The volume rate of

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VALVE DESIGN AND FUNCTION:

Fig. 1 - Typical Tank Installation
Tank protection equipment typically includes an operating valve which is designed to provide pressure/vacuum relief under normal pump in/out and thermal breathing conditions. An emergencyrelief valve can also provide both pressure and vacuum relief and normally it is sized to provide pressure relief if there is a fire in the immediate vicinity of the tank. It may also be sized by the tank designer to provide protection in the event of equipment failure (such as the rupture of a process steam line or an inert gas blanketing system failing “wide open”) or operator error. A typicaltank installation is shown in Fig. 1 which includes the following Groth products: • • • Model 1220A ‘P/V’ Weight Loaded Valve Model 3000 Gas Blanketing Regulator Model 2000 Emergency ‘P’ Relief Valve

Installation Notes: (See Fig. 1 above) 1. Minimum clearance between tank roof and vacuum inlet port must be at least equal to the valves’ nominal flange bore. 2. Tank nozzle bore must be > or =...