초록 ▼

An apparatus for pressurizing and purging the interior of an enclosure (1) comprises a purge valve (3) operable to admit gas to the enclosure either at a high flow rate or at a low flow rate, and a pneumatic control system for the purge valve including a purge/power selector module (6), a enclosure

An apparatus for pressurizing and purging the interior of an enclosure (1) comprises a purge valve (3) operable to admit gas to the enclosure either at a high flow rate or at a low flow rate, and a pneumatic control system for the purge valve including a purge/power selector module (6), a enclosure pressure module (4) and a timing module (5) mounted on respective faces of the purge valve body. The purge valve body serves as a manifold providing necessary connections of the control modules (4-6) with each other and the enclosure interior whereby pipe connections are minimized.

대표청구항 ▼

An apparatus for pressurising and purging with gas the interior of an enclosure, comprising purge valve means for controlling communication between a source of pressurised gas and the enclosure interior for gas to enter the enclosure either at a relatively high flow rate for purging or at a substant

An apparatus for pressurising and purging with gas the interior of an enclosure, comprising purge valve means for controlling communication between a source of pressurised gas and the enclosure interior for gas to enter the enclosure either at a relatively high flow rate for purging or at a substantially reduced flow rate for maintaining a positive pressure in the enclosure, and pneumatically operable control means for operating the purge control valve, whereby gas initially enters the enclosure at said reduced flow rate, upon the enclosure pressure reaching a given pressure level the purge valve means is opened for gas to enter the enclosure at said high flow rate, and the purge valve means is closed so that gas enters the enclosure at the reduced flow rate again after the purging gas flow has been established for a certain time, wherein the purge valve means comprises a valve body adapted to be mounted directly on a wall the enclosure with port means provided in a face of the valve body registering with orifice means in said wall for communicating the pressurising and purging apparatus directly with the enclosure interior, and the valve body carries the pneumatic control means and constitutes a manifold providing communication between different parts of the control means and communication thereof with the chamber enclosure.