ZBFA72W-10P/R Vacuum Negative Pressure Safety Valve
Vacuum Negative Pressure Safety Valve for negative-pressure vessels and systems where air must be admitted automatically to prevent vacuum damage. Key selection data include DN20-DN250, PN10, Confirm by vessel medium and material configuration, materials, connection standard and set pressure.
最终整定压力、认证泄放量、材质代号及连接标准须以经批准的参数表为准，并在采购前予以确认。.
- Size range: DN20-DN250
- Pressure rating: PN10
- Temperature: Confirm by vessel medium and material configuration
- Connection: Flanged connection
- Media: Air intake for vacuum relief; corrosive vessel service such as absorption tower, distillation tower, storage tank and vessel systems
- 图纸、试验记录和材料文件已按订购配置确认。.
技术参数与选型数据
产品型号
ZBFA72W-10P/R
尺寸范围
DN20-DN250
压力等级
PN10
温度范围
Confirm by vessel medium and material configuration
适用介质
Air intake for vacuum relief; corrosive vessel service such as absorption tower, distillation tower, storage tank and vessel systems
连接类型
Flanged connection
标准与合规
安全阀设计、性能及试验参考遵循 GB/T 12241、GB/T 12242 和 GB/T 12243；适用时，型号编制遵循 JB/T 308 阀门型号编制方法。.
工程解析：型号逻辑与应用边界
型号代码： FA72W = vacuum negative pressure safety valve; P/R identify stainless material options; 10 identifies PN10 rating.
典型应用： negative-pressure vessels and systems where air must be admitted automatically to prevent vacuum damage
排量审查： 主要连接尺寸列于源目录页面。排量及流道尺寸应根据整定压力、介质、温度及适用规范进行确认。.
本产品系列不应仅依据型号、公称尺寸或压力等级进行选型。请确认泄放工况、所需泄放量、整定压力、操作裕量、温度、背压及实际连接标准。.
尺寸与选型指南
The table below is transcribed from catalog page 36. Verify critical dimensions against the approved order drawing before fabrication or piping release.
| 公称通径（DN） | 公称通径（DN） | do | G1 | G | L | L1 | Approx. H |
|---|---|---|---|---|---|---|---|
| 20 32 40 50 80 100 125 150 200 250 | 95 | 65 | 45 | 46126 | 14 | 230 | |
| 20 32 40 50 80 100 125 150 200 250 | 105 | 75 | 55 | 4.14 | 16 | 230 | |
| 20 32 40 50 80 100 125 150 200 250 | 1 1 5 | 85 | 65 | 46126 | 16 | 230 | |
| 20 32 40 50 80 100 125 150 200 250 | 140 | 100 | 78 | 4.18 | 16 | 230 | |
| 20 32 40 50 80 100 125 150 200 250 | 150 | 1 10 | 85 | 46130 | 16 | 230 | |
| 20 32 40 50 80 100 125 150 200 250 | 160 | 125 | 100 | 4.18 | 240 | ||
| 20 32 40 50 80 100 125 150 200 250 | 200 | 160 | 135 | 4.18 | 20 | 255 | |
| 20 32 40 50 80 100 125 150 200 250 | 220 | 180 | 155 | 8.18 | 20 | 265 | |
| 20 32 40 50 80 100 125 150 200 250 | 250 | 210 | 185 | 8.18 | 22 | 325 | |
| 20 32 40 50 80 100 125 150 200 250 | 285 | 240 | 210 | 46257 | 24 | 365 | |
| 20 32 40 50 80 100 125 150 200 250 | 340 | 295 | 265 | 8.23 | 24 | 465 | |
| 20 32 40 50 80 100 125 150 200 250 | 395 | 350 | 320 | 46379 | 25 | 550 |
RFQ checklist
询价清单：型号或阀门类型、DN/NPS、PN/Class、整定压力、泄放介质、工作温度、阀体及内件材质、进出口连接标准、阀帽/杠杆/先导选项、数量、图纸、证书及检验要求。.
Failure Analysis, Manufacturing Evidence and Quality Control
Common misapplication risks: incorrect thread or connection standard, insufficient certified relieving capacity, unsuitable body or trim material, operating pressure too close to set pressure, unreviewed back pressure, and installation loads transferred to the valve.
Material review: body materials: P/R stainless steel material options for corrosive vessel service. Trim and internals: Corrosion-resistant trim selected by medium. Spring and stem: 50CrVA spring for standard service; stainless or coated fluoroplastic/304 spring options for corrosive service where specified.
Testing and inspection: Set pressure calibration, shell strength test, seat tightness/leakage test, reseating/blowdown check, dimensional inspection and material verification can be supplied according to the confirmed standard and order requirements.
Source and scope: product data is based on Zobai Safety Valve Product Catalog.pdf, catalog page 36. Project compliance remains subject to the approved datasheet, drawing, calculation and controlled certificates for the ordered configuration.
Review material traceability, type-test scope 和 project certificate requirements.
Related Products
常见问题
Safety Valve FAQs
What models are covered by this ZBFA72W-10P/R Vacuum Negative Pressure Safety Valve page?
ZBFA72W-10P/R
应确认哪些尺寸、压力和温度数据？
Size: DN20-DN250. Pressure: PN10. Temperature: Confirm by vessel medium and material configuration. Confirm the exact combination for the selected model.
该产品系列可处理哪些介质？
Air intake for vacuum relief; corrosive vessel service such as absorption tower, distillation tower, storage tank and vessel systems. Material and sealing compatibility require review for the actual fluid composition and temperature.
产品目录中的尺寸表能否用于最终制造？
仅用于初步审查。在管道或设备制造前，请根据批准的订单图纸确认关键尺寸、连接细节和方向。.
询价单（RFQ）中应包含哪些内容？
询价清单：型号或阀门类型、DN/NPS、PN/Class、整定压力、泄放介质、工作温度、阀体及内件材质、进出口连接标准、阀帽/杠杆/先导选项、数量、图纸、证书及检验要求。.