Abstract: A vent assembly (200) comprises a housing (13), a flow conduit (10) and a weather hood (12), the flow conduit (10) having a proximal end (10A) for being fluidly connected to a source of material and an open distal end (10B), the housing (13) having a base portion (13A), a side wall portion (13B), and a top portion (13C), the flow conduit (10) comprising a baffle (12E) located between the base portion (13A) and the top portion (13C) of the housing (13) to direct fluid flowing from the flow conduit (10) towards the weather hood (12) and through the housing (13) in a direction towards the top portion (13C) of the housing (13).

Abstract: A valve apparatus [11] for connection to a tank or pipe, the valve apparatus [11] comprises a housing [12], a first opening [176a] and a second opening [177a] communicating with respective first conduit [16] and second conduit [17] each for providing ingress and egress of fluid into and out of the housing [11] through the first opening [176a] and the second opening [177a], and discrete first and second valve means or valves [14; 15] which are spaced apart from one another, the first and second valve means or valves [14; 15] selectively controlling fluid flow between the first and second conduits [16; 17], wherein, in use, the principal flow axes along the first conduit [16] and second conduit [17] are parallel and opposed, the first valve means or valve [14] is configured to open when the pressure in the first conduit [16] is greater than a first pressure and the second valve means or valve 15 is configured to open when the pressure in the first conduit [16] is less than the first pressure.

Abstract: A flame arrester (FA1) having an inlet (12) and an outlet (32), a housing (13, 23, 33) between the inlet (12) and outlet (32), one or more baffle plates (14, 34) and a flame arrester element (20) located within the housing (13, 23, 33). The inlet (12) has a maximum diametric dimension (D12). A first baffle plate (14) is located downstream of the inlet (12) and the flame arrester element (20) is located downstream of the first baffle plate (14). A second baffle plate (34) is located downstream of the flame arrester element (20) and upstream of the outlet (32). The baffle plates (14, 34) are secured to the inner wall of the housing (13, 23, 33) and each has an aperture (15, 35). The aperture (15) of the first baffle plate (14) has a minimum diametric dimension of at least 0.75D12.

Abstract: A flame arrester 10, the flame arrester 10 having a housing 2 in which there is provided a flame arrester element 3 and into which extends a conduit 1, a portion of the conduit being at least partially surrounded by the flame arrester element 3 and wherein the conduit 1 has a principal flow axis extending along the conduit for flow of gas into or out of the flame arrester 10 and the flame arrester element 3 has a principal flow axis for flow of gas out of or in to the flame arrester 10, the principal flow axis along said portion and the principal flow axis through the flame arrester element 3 extending in opposite directions and wherein the conduit 1 has a cross sectional area A and, at a working surface, the flame arrester element 3 has a cross sectional area of A or above.

Abstract: A flame arrester (FA1) having an inlet (12) and an outlet (32), a housing (13, 23, 33) between the inlet (12) and outlet (32), one or more baffle plates (14, 34) and a flame arrester element (20) located within the housing (13, 23, 33). The inlet (12) has a maximum diametric dimension (D12). A first baffle plate (14) is located downstream of the inlet (12) and the flame arrester element (20) is located downstream of the first baffle plate (14). A second baffle plate (34) is located downstream of the flame arrester element (20) and upstream of the outlet (32). The baffle plates (14, 34) are secured to the inner wall of the housing (13, 23, 33) and each has an aperture (15, 35). The aperture (15) of the first baffle plate (14) has a minimum diametric dimension of at least 0.75D12.