Abstract: When sample collection cylinders get full, they need to be switched out with empty sample collection cylinders. The connection between the sample cylinder and a piping system is often a quick-connect which typically has a high pressure rating when closed and a lower pressure rating when opened. The bleeder valve of the present invention, when installed in the piping system between the quick-connect and the sample cylinder can be used to reduce the pressure in the system and the quick-connect to rated pressures before the quick-connect is opened. In an alternative embodiment intended for service with hazardous materials, the bleeder valve and seals are formed from resistant materials and the vent is connected to a flare or other suitable point of disposal.

Abstract: A sensor and carrier device are provided in combination with a pipeline for either placing a sensor element within the flow stream of the pipeline or a device to divert flow outside of the pipeline to measure a parameter of the conditions within the pipeline or of the gas flowing through the pipeline. The configuration of the probe comprising the carrier and sensor is such as to reduce the possibility of structural failure of the probe.

Abstract: In a vanishing chamber pump mechanism, an improved apparatus is set forth. The preferred embodiment incorporates a resilient plug adapted to work opposite an anvil which relatively reciprocates to pump sample trapped in the hemispherical chamber within said resilient plug. The improved version incorporates a metallic insert axially centered in the hemispherical cavity, and it is anchored in place by an enlarged root extending into the body which is intervally cast around the insert.