ZBA68SB-100/160/210/550 C/I/V ZBA68 Series High Temperature and High Pressure Steam Safety Valve
ZBA68 Series High Temperature and High Pressure Steam Safety Valve for power plant boilers, high-pressure steam pipelines and steam pressure equipment. Key selection data include DN50-DN150, PN100, PN160, PN210 and PN550 model ratings, C type up to 425 deg C; I type up to 510 deg C; V type up to 550 deg C, materials, connection standard and set pressure.
Final set pressure, certified relieving capacity, material code and connection standard must be confirmed on the approved datasheet before purchase.
- Size range: DN50-DN150
- Pressure rating: PN100, PN160, PN210 and PN550 model ratings
- Temperature: C type up to 425 deg C; I type up to 510 deg C; V type up to 550 deg C
- Connection: Flanged inlet and outlet for high-pressure steam service
- Media: Steam
- Drawings, test records and material documents confirmed for the ordered configuration.
Technical Specifications and Selection Data
Product Model
ZBA68SB-100/160/210/550 C/I/V
Size Range
DN50-DN150
Pressure Rating
PN100, PN160, PN210 and PN550 model ratings
Temperature Range
C type up to 425 deg C; I type up to 510 deg C; V type up to 550 deg C
Applicable Media
Steam
Connection Type
Flanged inlet and outlet for high-pressure steam service
Standards and Compliance
GB/T 12241, GB/T 12242 and GB/T 12243 for safety valve design, performance and test references; model coding follows the JB/T 308 valve model method where applicable.
Engineering Insight: Model Logic and Application Boundary
Model code: A68SB = high-temperature high-pressure steam safety valve; pressure digits identify PN rating; C/I/V identify material and temperature class.
Typical application: power plant boilers, high-pressure steam pipelines and steam pressure equipment
Capacity review: Catalog includes DN50-DN150 dimension table and high-pressure steam performance requirements. Final discharge sizing should be calculated from steam relieving duty.
This product family should not be selected from model code, nominal size or pressure class alone. Confirm the relieving scenario, required capacity, set pressure, operating margin, temperature, back pressure and actual connection standard.
Dimensions and Selection Guide
The table below is transcribed from catalog page 046-048. Verify critical dimensions against the approved order drawing before fabrication or piping release.
| Type / Model | Nominal Diameter (DN) | D2 | DI | Nominal Pressure (PN) | L | L1 | Approx. H |
|---|---|---|---|---|---|---|---|
| A68SB-100/160/210/550C/I/V | DN50 | 100 | 88 | 100 – 2.5/4.0 | 1 、 6 | 180 | 250 |
| A68SB-100/160/210/550C/I/V | DN65 | 140 | 1 10 | 150.2.5/4.0 | 1 、 6 | 215 | 290 |
| A68SB-100/160/210/550C/I/V | DN80 | 140 | 1 17 | 150 – 2.5/4.0 | 1.6 | 215 | 310 |
| A68SB-100/160/210/550C/I/V | DN100 | 170 | 1 17 | 200.2.5/4.0 | 270 | 380 | |
| A68SB-100/160/210/550C/I/V | DN150 | 225 | 172 | 250 – 2.5/4.0 | 1 、 6 | 320 | 420 |
| NO. | Pa rt Name | Column 3 | Material | Column 5 |
|---|---|---|---|---|
| 1 2 3 4 5 6 7 8 9 12 13 14 15 | NozzIe | 304/AI05+STL | 304/15CrM0+STL | 12CrMoV+STL |
| 1 2 3 4 5 6 7 8 9 12 13 14 15 | Body | WC B | ZGI5Cr1MO | ZG15Cr1M01V |
| 1 2 3 4 5 6 7 8 9 12 13 14 15 | Down Adj usting Ring | 20Cr13 | 304 | 304 |
| 1 2 3 4 5 6 7 8 9 12 13 14 15 | Set Screw | 20Cr13 | 304 | 304 |
| 1 2 3 4 5 6 7 8 9 12 13 14 15 | Disc | 304/17.4PH | N07718 | N07718 |
| 1 2 3 4 5 6 7 8 9 12 13 14 15 | Up Adjusting Ring | 20Cr13 | 304 | 304 |
| 1 2 3 4 5 6 7 8 9 12 13 14 15 | Guide | 20Cr13 | 304 | 304 |
| 1 2 3 4 5 6 7 8 9 12 13 14 15 | Radiator | WC B | WCB | ZGI5Cr1MO |
| 1 2 3 4 5 6 7 8 9 12 13 14 15 | Spring washer | C.St | C.St | C.St |
| 1 2 3 4 5 6 7 8 9 12 13 14 15 | SpindIe | 1Cr17Ni2 | 1Cr17Ni2 | 1Cr17Ni2 |
| 1 2 3 4 5 6 7 8 9 12 13 14 15 | Bonnet | WC B | WCB | WCB |
| 1 2 3 4 5 6 7 8 9 12 13 14 15 | Spring | 50CrVA | 30W4Cr2VA | 30W4Cr2VA |
| 1 2 3 4 5 6 7 8 9 12 13 14 15 | Adjusting Bolt | 20Cr13 | 20Cr13 | 20Cr13 |
| 1 2 3 4 5 6 7 8 9 12 13 14 15 | Adj; Bolt Nut | €BC.St | C.St | C.St |
| 1 2 3 4 5 6 7 8 9 12 13 14 15 | Ca p | WC B | WCB | WCB |
RFQ checklist
RFQ checklist: model or valve type, DN/NPS, PN/Class, set pressure, relieving medium, operating temperature, body and trim material, inlet/outlet connection standard, cap/lever/pilot options, quantity, drawing, certificate and inspection requirements.
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: High-temperature alloy steel material selected by C/I/V code and steam condition. Trim and internals: High-performance high-temperature disc and nozzle materials; Stellite hard alloy overlay on disc and seat. Spring and stem: High-performance spring tested under simulated high-pressure and high-temperature service conditions.
Testing and inspection: Set pressure tolerance <= +/-1 percent for PS > 7 MPa, overpressure <= 3 percent PS, blowdown <= 7 percent PS, plus thermal-state testing where required.
Source and scope: product data is based on Zobai Safety Valve Product Catalog.pdf, catalog page 046-048. Project compliance remains subject to the approved datasheet, drawing, calculation and controlled certificates for the ordered configuration.
Review material traceability, type-test scope and project certificate requirements.
Related Products
FAQ
Safety Valve FAQs
What models are covered by this ZBA68SB-100/160/210/550 C/I/V ZBA68 Series High Temperature and High Pressure Steam Safety Valve page?
ZBA68SB-100/160/210/550 C/I/V
What size, pressure and temperature data should be confirmed?
Size: DN50-DN150. Pressure: PN100, PN160, PN210 and PN550 model ratings. Temperature: C type up to 425 deg C; I type up to 510 deg C; V type up to 550 deg C. Confirm the exact combination for the selected model.
Which media can this product family handle?
Steam. Material and sealing compatibility require review for the actual fluid composition and temperature.
Can the catalog dimension table be used for final fabrication?
Use it for preliminary review only. Confirm critical dimensions, connection details and orientation on the approved order drawing before piping or equipment fabrication.
What should be included in the RFQ?
RFQ checklist: model or valve type, DN/NPS, PN/Class, set pressure, relieving medium, operating temperature, body and trim material, inlet/outlet connection standard, cap/lever/pilot options, quantity, drawing, certificate and inspection requirements.