ZBYA42H-160/250/400; ZBYA802Y-600 Safety Relief Valve
Safety Relief Valve for hydraulic transfer pipelines and high-pressure process systems requiring overflow or overpressure relief. Key selection data include DN15-DN40 for YA42H high-pressure series; YA802Y dimensions per catalog, PN160, PN250, PN400 and PN600, Up to 200 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: DN15-DN40 for YA42H high-pressure series; YA802Y dimensions per catalog
- Pressure rating: PN160, PN250, PN400 and PN600
- Temperature: Up to 200 deg C
- Connection: High-pressure flanged or threaded connections according to model
- Media: Petroleum, chemical and other hydraulic conveying pipelines
- Drawings, test records and material documents confirmed for the ordered configuration.
Technical Specifications and Selection Data
Product Model
ZBYA42H-160/250/400; ZBYA802Y-600
Size Range
DN15-DN40 for YA42H high-pressure series; YA802Y dimensions per catalog
Pressure Rating
PN160, PN250, PN400 and PN600
Temperature Range
Up to 200 deg C
Applicable Media
Petroleum, chemical and other hydraulic conveying pipelines
Connection Type
High-pressure flanged or threaded connections according to model
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: YA42H and YA802Y identify safety relief/overflow valve variants; pressure digits identify high-pressure PN rating.
Typical application: hydraulic transfer pipelines and high-pressure process systems requiring overflow or overpressure relief
Capacity review: Main connection dimensions are listed on the source catalog page. Discharge capacity and orifice sizing should be confirmed by set pressure, medium, temperature and applicable code.
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 39. Verify critical dimensions against the approved order drawing before fabrication or piping release.
| Nominal Pressure (PN) | Nominal Diameter (DN) | Column 3 | Column 4 | D | Column 6 | M | do | Column 9 | Column 10 | RC | Column 12 | Column 13 | Column 14 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| YA42H-160/250/400 | 95 | 105 | 46130 | M33x3 | 10 | 88 | 1 17 | 3 | 25 | 20 | 248 | ||
| YA42H-160/250/400 | 15 | 105 | 135 | 6.26 | M48x3 | 15 | 95 | 140 | 25 | 25 | 290 | ||
| YA42H-160/250/400 | 20 | 135 | 200 | 46202 | M56x3 | 20 | 145 | 170 | 40 | 30 | 356 | ||
| YA42H-160/250/400 | 25 | 140 | 200 | 6.29 | M64x3 | 25 | 145 | 173 | 2" | 40 | 38 | 440 | |
| YA42H-160/250/400 | 32 | 160 | 210 | 46202 | M64x3 | 32 | 155 | 181 | 21/2 | 40 | 40 | 520 | |
| Type | (DN) | Rc | |||||||||||
| YA802Y-600 | 1/2" | 46024 | 105 | 90 | 280 | ||||||||
| YA802Y-600 | 600 | ||||||||||||
| YA802Y-600 | 25 | 105 | 1 | 15 | 305 |
| Type / Model | Nominal Diameter (DN) | R | Rc | L | L1 | Approx. H |
|---|---|---|---|---|---|---|
| YA802Y-600 | 1/2" | 46024 | 105 | 90 | 280 | |
| YA802Y-600 | 25 | 105 | 1 15 | 305 |
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-pressure carbon/alloy steel or stainless material according to model and service. Trim and internals: Hard alloy or corrosion-resistant trim for hydraulic and chemical service. 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 39. 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 ZBYA42H-160/250/400; ZBYA802Y-600 Safety Relief Valve page?
ZBYA42H-160/250/400; ZBYA802Y-600
What size, pressure and temperature data should be confirmed?
Size: DN15-DN40 for YA42H high-pressure series; YA802Y dimensions per catalog. Pressure: PN160, PN250, PN400 and PN600. Temperature: Up to 200 deg C. Confirm the exact combination for the selected model.
Which media can this product family handle?
Petroleum, chemical and other hydraulic conveying pipelines. 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.