b'SIGHT GLASSES - SLSG SERIES I N T R O D U C T I O NThe majority of this information is common knowledge to experienced valve users. When properly installed in applications for which they were designed, Flowturn valves will give long reliable service. This instruction is only a guide for installation and operation on standard service and covers general maintenance and minor repairs. A professional APV approved valve engineering facility should be utilised for reconditioning or major repairs.We do recommend however that this entire document be read prior to proceeding with any installation or repair. Australian Pipeline Valve and its parent company take no responsibility for damage or injury to people, property or equipment. It is Note the sole responsibility of the user to ensure only specially trained valve repair experts perform repairs under the supervision of a qualified supervisor.RESPONSIBILITY FOR SIGHT GLASS APPLICATIONThe User is responsible for ordering the correct valves. The user is responsible for ensuring APV-Flowturn Valves are selected and installed in conformance with the current pressure rating and design temperature requirements. Prior to installation, the valves and nameplates should be checked for proper identification to ensure the valve is of the proper type, material and is of a suitable pressure class and temperature rating to satisfy the requirements of the service application.Do not use sight glasses in applications where either the pressure or temperature is higher than the allowable working values.Also sight glasses should not be used in service media if not compatible with the sight glass material of construction, as this will cause chemical attacks, leakage, valve failure.RECEIVING INSPECTION AND HANDLINGValves should be inspected upon receipt to ensure:-Conformance with all purchase order requirements.-Correct type, pressure class, size, body and trim materials and end connections.-Any damage caused during shipping and handling to end connections, hand wheel or stem.The User is advised that specifying an incorrect valve for the application may result in injuries or property damage. Selecting the correct valve type, rating, material and connections, in conformance with the required performance requirements is important for proper application and is the sole responsibility of the user.2 Australian Pipeline Valve - Installation, Operation and Maintenance Manual'