A passive explosion isolation valve (10) is provided that comprises vertically-oriented gate members (40, 42) configured to close automatically in response to an energetic event occurring downstream of the valve. The valve (10) may be optionally equipped with a valve seat cleaning assembly (46) configured to removed accumulated particulate material away from the area of the valve seat (48) and/or one or more latch assemblies (44) configured to secure the gate members (40, 42) in the closed position following closure of the valve (10) in response to an energetic event.

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.

A flame arrester for a process device is provided. The flame arrester includes a flame arrester element formed of a first helix having a first axis and a second helix having a second axis, wherein the first axis and the second axis are unparallel. A housing configured to mount to the process device. The flame arrester element is mounted to the housing. A combustion analyzer employing an improved flame arrester is provided along with a method of manufacturing an improved flame arrester for process devices.

A flame arrester for a process device is provided. The flame arrester includes a flame arrester element formed of a first helix having a first axis and a second helix having a second axis, wherein the first axis and the second axis are unparallel. A housing configured to mount to the process device. The flame arrester element is mounted to the housing. A combustion analyzer employing an improved flame arrester is provided along with a method of manufacturing an improved flame arrester for process devices.

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).

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).

Described herein is a kitchen ventilation system, comprising: a kitchen hood communicative with a kitchen exhaust duct; a fan communicative with the hood to create an air flow through the hood and to the exhaust duct; a fire barrier air filter mounted to the hood to receive and filter the air flow, the fire barrier air filter comprising a plurality of elongate extruded bodies in parallel alignment; each extruded body bound by first and second opposing concave surfaces and first and second baffle surfaces, the first and second baffle surfaces oriented transverse to the air flow; and at least one of the of the first and second concave surfaces oriented in facing opposition to a neighboring concave surface provided by a neighboring extruded body to form a cooperating pair of facing concave surfaces, the pair of facing concave surfaces defining a narrow longitudinal inlet gap, a narrow longitudinal outlet gap, and a longitudinal tubular chamber communicating therebetween. A kit providing at least a fire barrier air filter of the system and instructions for its installation is also described. A method of fire prevention using components of the system or kit is also described.

Described herein is a kitchen ventilation system, comprising: a kitchen hood communicative with a kitchen exhaust duct; a fan communicative with the hood to create an air flow through the hood and to the exhaust duct; a fire barrier air filter mounted to the hood to receive and filter the air flow, the fire barrier air filter comprising a plurality of elongate extruded bodies in parallel alignment; each extruded body bound by first and second opposing concave surfaces and first and second baffle surfaces, the first and second baffle surfaces oriented transverse to the air flow; and at least one of the of the first and second concave surfaces oriented in facing opposition to a neighboring concave surface provided by a neighboring extruded body to form a cooperating pair of facing concave surfaces, the pair of facing concave surfaces defining a narrow longitudinal inlet gap, a narrow longitudinal outlet gap, and a longitudinal tubular chamber communicating therebetween. A kit providing at least a fire barrier air filter of the system and instructions for its installation is also described. A method of fire prevention using components of the system or kit is also described.

Screening machine (10) for screening solid materials, comprising both a screening box (12) shaped so as to have a plurality of perimeter walls (16, 17, 19, 21) and an upper wall (15), and configured to make said solid materials to be screened flow inside it, and also a plurality of anti-propagation devices (27), at least a first of which is disposed on said upper wall (15).

The present invention relates to spark traps/arrestors that are unproved relative to those that currently exist. For example, the present invention relates to a spark arrestor/trap that comprises a plurality of features that allows sparks/embers to be more effectively extinguished. The spark trap/arrestor of the present invention has at least two of vanes, conical devices and u-turns that allows for sufficient oxygen and a tortured path that is sufficiently long so as to effectively extinguish sparks and/or embers that enter the system. Alternatively, the system relates to a spark arrestor that comprises all of vanes, conical devices and u-turns that allows for sufficient oxygen and a tortured path that is sufficiently long so as to effectively extinguish sparks and/or embers that enter the system. In one embodiment, the various parts of the spark arrestor can be separated allowing for easy cleaning of the system.