초록 ▼

A leak test system is disclosed for a double block and bleed valve arrangement, the system including a second vent valve disposed along the bleed line and a secondary gas supply line connected to the bleed line for introducing gas at a known pressure into the bleed line to test the valves and ensure

A leak test system is disclosed for a double block and bleed valve arrangement, the system including a second vent valve disposed along the bleed line and a secondary gas supply line connected to the bleed line for introducing gas at a known pressure into the bleed line to test the valves and ensure that they are not leaking. A pressure switch and pressure gauge monitor are positioned to monitor the pressure within the bleed line. The pressure switch activates an alarm if the pressure in the bleed line changes, thereby indicating a leak. A method for testing each valve in the arrangement is also disclosed.

대표청구항 ▼

A leak test system for a double block and bleed valve arrangement having first and second safety shutoff valves disposed along a gas supply line, and a vented bleed line extending from the gas supply line between the first and second safety shutoff valves with a vent valve disposed along the bleed l

A leak test system for a double block and bleed valve arrangement having first and second safety shutoff valves disposed along a gas supply line, and a vented bleed line extending from the gas supply line between the first and second safety shutoff valves with a vent valve disposed along the bleed line, the leak test system comprising: a second vent valve disposed along the bleed line downstream from the vent valve; and pressure monitoring means in communication with the bleed line for monitoring pressure in the bleed line between the first and second vent valves.