Abstract: A valve comprises a housing having a main inlet, a detection port and an outlet, each providing a channel extending from an exterior of the valve into a hollow interior defined in part by the housing. The inlet is arranged, in use, to be in fluid communication with the interior of a pressurised cylinder of extinguishant fluid. The detection port is arranged, in use, to be in fluid communication with a fire detection system. The valve has two valve parts which are relatively movable between a first position, a second position and a third position. In the first position, a face seal prevents communication between the high pressure chamber and the low pressure chamber, in the second position, the face seal is in an unsealed position and allows communication between the high pressure chamber and the low pressure chamber, and in the third position, the face seal prevents communication between the high pressure chamber and the low pressure chamber.

Abstract: The valve 100 comprises a housing 102 having a main inlet 104, a detection port 106 and an outlet 108. The inlet 104, detection port 106 and outlet 108 each provide a channel extending from an exterior of the valve into a hollow interior 110 defined in part by the housing 102. The inlet 104 is arranged, in use, to be connected to a source of pressurised extinguishant fluid. The inlet is arranged to be in fluid communication with the interior of a pressurised cylinder. The detection port 106 is arranged, in use, to be in fluid communication with a fire detection system. Specifically, the detection port is arranged to be in communication with a length of fusible fire detection tubing 12. The valve has two valve parts 124, 130 which are relatively movable between a first position, a second position and a third position.