How to calculate the diameter of a breather valve
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Could someone knowledgeable please tell me how to calculate the diameter of a vent valve, and what parameters should be considered to select the appropriate size for such a valve? This is urgent. Thank you. Our company needs safety relief devices for the following equipment, with the following specifications:Item number: F-4001-2X: 1. Gas flow rate: 7646 m3/h; 2. Working medium: N2 + HPDE powder; 3. Operating temperature: 80 °C; 4. Operating pressure: 0.015 MPa.G; 5. Design temperature: 110 °C; 6. Design pressure: 0.03 MPa.G; 7. Gas inlet diameter: 10”, outlet diameter: 16”; 8. Explosion-proof zone: Zone 22 T119; Back pressure: 0.10. Valve body material required: 304.
Item number: F-4001-4X: 1. Gas flow rate: 1940 m3/h; 2. Working medium: N2 + HPDE powder; 3. Operating temperature: 80 °C; 4. Operating pressure: 0.04 MPa.G; 5. Design temperature: 110 °C; 6. Design pressure: 0.4 MPa.G; 7. Gas inlet diameter: 5”, outlet diameter: 6”; 8. Explosion-proof zone: Zone 22 T119; Back pressure: 0.10. Valve body material required: 304.
Item number: F-4001-3X: 1. Gas flow rate: 2250 m3/h; 2. Working medium: N2 + HPDE powder; 3. Operating temperature: 80 °C; 4. Operating pressure: 0.015 MPa.G; 5. Design temperature: 110 °C; 6. Design pressure: 0.03 MPa.G; 7. Gas inlet diameter: DN1300, outlet diameter: 8”; 8. Explosion-proof zone: Zone 22 T119; Back pressure: 0.10. Valve body material required: 304.
Item number: F-4001-5X: 1. Gas flow rate: 8096 m3/h; 2. Working medium: N2 + HPDE powder; 3. Operating temperature: 80 °C; 4. Operating pressure: 0.015 MPa.G; 5. Design temperature: 110 °C; 6. Design pressure: 0.03 MPa.G; 7. Gas inlet diameter: 10”, outlet diameter: 18”; 8. Explosion-proof zone: Zone 22 T119; Back pressure: 0.10. Valve body material required: 304.
We hope that safety relief devices (safety valves or vent valves) suitable for these applications can be provided based on the above specifications. The following data are required: valve model and type, discharge capacity (kg/h), opening pressure, opening height, and dimensions of the valve inlet and outlet
This diameter needs to be calculated based on the safe discharge volume, but generally it is determined by the process engineering team.
Learned it, thanks for sharing, upvoting :)
Is it definitely a breathing valve that should be used upstairs? Based on the parameters mentioned above, only the diameter required for emergency release can be calculated. For more information on vent valve products as well as calculation and selection tools, please contact Nanjing Banz. Nanjing Banz Petrochemical Equipment Co., Ltd. has been dedicated to the development and production of equipment for the petroleum, chemical industries, as well as for storage, transportation, mixing, filtering, and conveying processes. The enterprise boasts strong technical capabilities, advanced processing equipment, and comprehensive testing equipment. The company manufactures and develops mixers, flame arrestors, filters, breather valves, emergency vent manholes, emergency breathing manholes, emergency relief valves, basket filters, T-type filters, dual-switch filters, precision filters, straight-through sight glasses, three-way sight glasses, silencers, and dip pipes. There are over 10 major categories in total. Our advantages include: 1. We utilize the foreign PRO-FLOW III system for dimension adjustment, and the software allows for the selection of pressure and breathing volume parameters; it also calculates flow rates and diameters, meeting the safety discharge requirements specified by the American Petroleum Institute’s API2000 standard for storage tank breather valves and emergency relief valves. Professional services for \"diameter and flow rate calculation\" in selection: \"calculations for the air flow rate of flame arresters\" + \"calculations for the pressure drop across flame arresters\" + \"calculations for the pressure loss associated with flame arresters\" + \"explosion-proof flame arresters\" + \"manufacturers of flame arresters\" + \"standards related to flame arresters\". Additionally, there are services for \"calculations related to emergency venting manholes\" + \"calculations related to breathing manholes\", as well as calculations for emergency release valves, including formulas for determining the flow rate required for such valves. There are also requirements regarding the safe air flow rate for venting manholes. Services are available from manufacturers of emergency venting manholes, as well as flame-arresting features for such manholes. Techniques for sealing emergency release valves are also provided, along with information on the impact of temperature and pressure. 2. Strict and precise processing. Third-party authorized certification for product performance test reports, a professional computing and R&D team. 3. Bonts’ products are designed and manufactured in strict compliance with international ISO standards, DIN standards, as well as 9001/2008, DIN ISO 1400