THINKTANK’s New Fire Fusible Link Valves with a Manual Lever Operator: Safety Just Got Simpler
Fire Fusible Link Valves with a manual lever operator.
Control Valve Solutions:
Control Valve Solutions:
The original failure phenomenon: the flow of the control valve decreases and the opening becomes larger after a period of operation.
After our engineer to inspect on-site, we found that a large number of impurities were blocked at the inlet of the flow hole of the cage, which caused the valve flow to decrease.
Reason: Because the flow hole of the multi-stage control valve’s cage is a 4mmx4mm labyrinth, the impurities in the pipeline are mostly sand and iron, which are stuck in the flow hole under the impact of high pressure and cause a blockage.
Since the renovation, the valve has been running well.
Modification project of flow characteristics of control valves at the feedstock inlet of Wuhan Petrochemical No. 2 catalytic unit.
Problem:
Tag No. FV105 and FV106 control valves are installed at the inlet port of the raw material. The raw material flow rate control needs to be very precise, especially when the flow rate is adjusted between 60~70 Ton. It needs to be adjusted according to the flow rate of 0.5 Ton each time. Due to the high adjustment accuracy requirements, After the valve is put into automatic operation, there will be 5%~10% fluctuations, affecting the end user’s normal production. The user can only change to manual operation, but it can only be set at 0.5% each time the valve position is given. Even then, Due to the positioner’s dead zone and the deviation of the valve itself, precise adjustment cannot be achieved.
Special Design: Cage-guided globe type control valve, with a special design of the flow window:
When the flow rate is below 33 Ton, the flow characteristic is an equal percentage; when the flow rate is 60~70Ton, the flow characteristic is linear; when the flow rate is above 70Ton, the flow characteristic is an equal percentage. In this way, it can meet the adjustment of small flow and large flow rate and meet the precise adjustment of valve opening between 56% and 75% when the flow is 60 ~ 70Ton. To realize the problem of the design flow characteristics of the partition.
FV105 And FV106 Control Valves
Shannxi Coalbed methane 60000Nm³h Natural Gas Liquefaction LNG Device
Boiler Feedwater System
84000nm³h Air Separation Unit & Air separation molecular sieve oxygen generator
Hydraulic Control Heavy Hammer Slow Closing Device
Nitrogen Equipment
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Fire Fusible Link Valves with a manual lever operator.
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