The body to bonnet joint is designed in accordance with ASME VIII Div. 1. The body thickness design is in accordance with ASME B16.34. The resulting overall body and bonnet structure and closure interface is generous in size thus allowing for a wide selection of gasket types and sealing configurations to meet severe operating parameters and services conditions such as sour service, low temperature and high temperature conditions.

The top entry ball valve is designed to be maintained in line. The bolted construction allows disassembly on-site for inspections and maintenance or repairs. Clearing the bonnet off the valve allows free access to the ball and the seats which can simultaneously be taken out with the use of simple tools available on request, without the need of removing the valve from the line.

A special modified design is available for maintenance of top entry to be installed with stem in horizontal position.

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