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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At its core, a pressure safety valve is a specialized device engineered to automatically release excess pressure from within a system when the pressure exceeds maximum allowable working pressure. These valves are viewed as pressure relief devices that are crucial in all industrial systems, designed to automatically responding to overpressure
In this blog, we provide a brief overview of pressure relief valves, highlighting their significance in the complex landscape of industrial systems.
Override in a pressure relief valve is a condition where the valve opens at a pressure higher than its designated set pressure.
The air compressor safety relief valve automatically opening to release excess pressure when the compressor pressure switch fails, because the pressure hits the predetermined system pressure limit and seamlessly closing once normal levels are restored.
As the Product Marketing Director and a Senior Valve Engineer at THINKTANK, I’m pleased to share insights into the design of Pressure Safety Valves (PSVs). This guide is tailored for valve and instrument engineers, valve company executives, engineering purchase managers, and professionals in related fields.
From chemical plants to power generation facilities, these safety relief valves are typically installed to control pressure and ensure the well-being of machinery and prevent the high risk of catastrophic failure.
| Project Name | Production | QTY | Country | End User Name | Year |
| THAISAREE Power Generation Company Limited | Pneumatic diaphragm control valve, pneumatic ball valve, self-operated pressure control valve | 15 Sets | Thailand | THAISAREE Power Generation Company Limited | 2018 |
| (Pakistan NOVETEX bottle grade mylar slicing engineering 600t/d mylar device) | Pneumatic eccentric ball valve, pneumatic diaphragm control valve, self-operated pressure control valve | 21 Sets | Pakistan | NOVETEX Limited | 2018 |
| Kermanshah Petrochemical Industries Company (KPIC) | Pneumatic Control Valve, Safety Valve, Air relieve valve, Solenoid valve, steam trap | 35 Sets | Iran | Kermanshah Petrochemical Industries Company (KPIC) | 2018 |
| N.I.O.C Pars Oil and Gas Company | Pneumatic Globe Control Valves | 26 Sets | Iran | N.I.O.C Pars Oil and Gas Company | 2018 |
| Bharat Aluminium Company Limited | Pneumatic Eccentric Rotary Plug Control Valve | 8 Sets | India | Bharat Aluminium Company Limited | 2018 |
| PT. Anugerah Barlian Sinergy Utama | Pneumatic globe control valve, gate valve, check valve, tri-eccentric butterfly valve. | 20 Sets | Indonesia | PT. Anugerah Barlian Sinergy Utama | 2019 |
| Jakarta chemical plant | Pneumatic O-type ball valve, pneumatic V- type ball valve | 16 sets | Indonesia | 2019 | |
| Expansion of PERAWANG MILL in Sumatra | Electric control valve, electric eccentric plug valve | 12 Sets | Indonesia | 2019 | |
| Paper Mill | Control Valves | 6 Sets | Iran | Kaghaz Kar Kasra Co. | 2019-2020 |
| DUQM INTEGRATED POWER & WATER PLANT (“DIPWP”) PROJECT | Self-Operated Regulator | 63 Sets | Oman | Power and Water LLC(DPC) | 2020 |
| Taweelah RO Independent Water Project | Pneumatic Globe Type Control Valve | 36 Sets | Abu Dhabi | ABENGOA | 2020 |
| Sugar Mill In Pakistan | FlowMeters, Control Valves | 22 Sets | Pakistan | FARAN SUGAR MILLS LTD | 2020 |
| Ethanol Plant | Pneumatic 3 way- Globe Type Control Valve | 1 Set | Chile | SQM | 2021 |
| SQM Lithium Carbonate Plant | Pneumatic Globe Type Control Valve | 2 Sets | Chile | SQM | 2021 |
| SQM Solution Recovery Plant Project | Pneumaitc Butterfly valve, Pneuamtic Rotary Plug Valve | 16 Sets | Chile | SQM | 2021 |
| SQM Lithium Carbonate Plant | Pneumatic Kinfe Gate Valve | 39 Sets | Chile | SQM | 2021 |
| HARU ONI DEMONSTRATIVE PLANT: DETAILED ENGINEERING OF MEG BOP | Pneumatic 3 Way Globe Type Control Valve | 1 Set | Chile | SQM | 2021 |
| 1.2466.01-CS | Self-Operated Pressure Regulator Valve | 1 Set | United Arab Emirates | Compressor Station – West Qourna – Irag | 2021 |
| SSGC-FP-10685 | Self-Operated Pressure Regulator | 114 Sets | Pakistan | Sui Southern Gas Company Limited | 2021 |
| Seafood processing plant | Butterfly valve, Motorized Globe Type Control Valve, Self-Operated Pressure Regulator | 138 Sets | Thailand | THAI UNION GROUP PUBLIC COMPANY LIMITED | 2022 |
| Liquefaction Plant | Two-Way & Three Way Pneumatic Globe Type Control ValveCryogenic Service | 17 Sets | Brazil | 2023 | |
| SIGER PROJECT | Motorized Ball Valve | 4 Sets | Indonesia | 2023 | |
| LITHIUM SOLUTION ITCs 5735-ITC-2067 | Pneumatic 3 way- Globe Type Control Valve | 4 Sets | Chile | 2023 | |
| ISO PROPANOL PLANT | Self-Operated Micro-Pressure RegulatingValve | 3 Sets | Iran | 2023 | |
| Canary Project P614 | Fusible Link Shutoff Valve, Flame Arrestor With Vent, Motorized Butterfly valve, Motorized Ball Valve, Manual Gate Valve/ Ball Valve/ Butterfly Valve, Swing Check Valve | 228 Sets | Malaysia | 2023 | |
| GKBI NBC2 Project | Manual Gate Valve, Butterfly Valve, Check Valve, Y- Strainer | 30 Sets | Thailand | 2023 | |
| Seafood processing plant | Pneumatic Globe Type Control Valve, Centrifugal Pump, Double Condensate Recovery Pump, Ball Valve, Check Valve, | 47 Sets | West Africa | 2023 | |
| Steam Components in Pepsi Plant | Pneumatic Globe Type Control Valve, Self- operated Presure Regulator, Y-Strainer, Ball Valve, Steam Trap, | 88 Sets | Philippines | 2023 | |
| Afipsky Oil Refinery LLC | Pneumatic Globe Type Control Valve, Motorized Butterfly valve, Motorized Globe Type Control Valve, Pneumatic Butterfly valve | 34 Sets | Russia | Afipsky Oil Refinery LLC | 2023 |
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We will reply you within 24 hours. If for urgent case, please add WhatsApp: +86 185 1656 9221, or WeChat: +86 199 2125 0077. Or call +86 189 5813 8289 directly.
