Ultrasonic flow meter

for chemicalsfor dosingcombined

PULSE ultrasonic chemical injection metering valves (CIMVs) are remotely operated, ROV-retrievable, self-regulating subsea chemical injection metering systems. Self regulation is an integral part of all our CIMV technology and only requires one user-defined input—flow rate— for the system to monitor and control using onboard closed-loop control. At the core of each PULSE CIMV is a nonintrusive line-of-sight ultrasonic flowmeter that reinvents achievable accuracy levels in CIMVs. Use of an ultrasonic flowmeter is replacing intrusive flow measurement techniques in other designs, introducing a step change in CIMV technology. The ultrasonic flowmeter fires an ultrasonic pulse with and against the chemical flow, then measures the difference in time of flight in both directions. The ultrasonic flowmeter is combined in closed-loop control with an electrically actuated throttling valve. Real-time feedback from the ultrasonic flowmeter is used to autonomously control the throttling valve, indefinitely maintaining an injection rate set point despite up- and downstream system disturbances. This technology is particulate tolerant, provides consistent best-in-class accuracy, and reliably measures chemical inhibitor flow rate without the need for filtration. It also features a high turndown ratio for adjustment from minimum to maximum flow combined with a low native pressure drop.Insert-retrievable, self-regulating subsea chemical injection metering valves for greater accuracy and reliability in low-dose inhibitor injection and hydrate mitigation.