PDF-documented product
A42Y Safety Relief Valve
The Lianggong product catalog identifies this item as A42Y Safety Relief Valve on PDF page 105. The page separates catalog-proven attributes from the project data that still requires technical confirmation.
- Valve type: Safety/Relief Valve
Product identity
What this catalog record owns
This page represents one documented catalog identity. It does not replace the parent product category and it does not claim an unverified model, rating or project history.
Product family
Safety/Relief Valve. This is the parent commercial route for category-level selection.
Catalog series
Safety Valve. This is the source-series context printed in the recovered product catalog.
Evidence source
Recovered Lianggong English product catalog, PDF page 105; mapped product image AST-R1-0390.
Catalog evidence
Catalog-documented product data
Only fields stated by the PDF catalog label are shown as product data. A descriptive term such as high pressure, large diameter or ASME does not create a numeric rating, orderable range or certification claim.
| Field | Catalog-documented value | Evidence status |
|---|---|---|
| Valve type | Safety/Relief Valve | VERIFIED — PDF catalog label |
| Catalog source series | Safety Valve | VERIFIED — PDF catalog section |
| Catalog source page | PDF page 105 | VERIFIED — recovered PDF mapping |
Important: values not shown in this table are intentionally unconfirmed. They must be resolved on the offered datasheet and approved order drawing.
Evidence boundary
Known facts and open configuration fields
The PDF proves the product label and mapped appearance. It does not by itself prove a complete bill of materials, operating envelope or order-ready model.
Confirmed by the catalog
- Valve type: Safety/Relief Valve The PDF label identifies the valve type; it does not define the full configuration.
Confirm before quotation
- Design / construction: confirm for the exact offered configuration
- Material descriptor: confirm for the exact offered configuration
- Actuation: confirm for the exact offered configuration
- Pressure descriptor: confirm for the exact offered configuration
- Size descriptor: confirm for the exact offered configuration
- Standard descriptor: confirm for the exact offered configuration
- Connection: confirm for the exact offered configuration
- Service / medium: confirm for the exact offered configuration
- Industry context: confirm for the exact offered configuration
- Temperature range and pressure-temperature limits
- Body/trim/seat details and material grades
- Testing, dimensions, certificates, price and lead time
Engineering review
How to specify the A42Y Safety Relief Valve
A usable inquiry connects the catalog identity to the real duty. The following inputs determine whether the offered configuration can be selected and documented safely.
Relieving duty
Provide the protected equipment, relieving scenario, required capacity, set pressure, allowable accumulation and back-pressure conditions.
Operating envelope
Provide nominal size, pressure class, operating/design pressure, minimum/maximum temperature and any transient or vacuum cases.
Materials and connection
Provide body, trim, seat/seal and wetted-parts requirements based on the actual fluid, temperature and corrosion/erosion conditions. Confirm end type, dimensional standard and mating interface.
Actuation requirement
State manual, gear, electric, pneumatic or hydraulic preference and provide the available utility and fail-action requirement.
Inspection and documents
List drawing, datasheet, material certificate, pressure/leakage test, inspection, marking and third-party witness requirements for the offered configuration.
Application boundary
Match the catalog identity to the real service
Product names are useful starting points, but final suitability depends on the complete operating case and the exact configuration offered for review.
Service medium
The PDF label does not assign a medium. Provide fluid composition, concentration, solids, corrosion/erosion risks and cleaning requirements.
Industry and system
Identify the plant, equipment and piping function. Industry naming alone is not enough to determine valve design or materials.
Installation boundary
Confirm orientation, flow direction, piping loads, available space, access, ambient conditions, maintenance method and mating interfaces.
Visual evidence
Mapped product images from the catalog
These images support product identity and appearance only. They do not establish dimensions, material grade, pressure rating, certification or the final supplied configuration.
Related product routes
Compare documented alternatives before RFQ
Use the parent category for commercial selection and these related catalog records for identity-level comparison. No page inherits specifications from another product.
A48SY-P Safety Relief Valve
Another PDF-documented Safety/Relief Valve catalog record. Review its own evidence and configuration boundary.
A48SY-V Safety Relief Valve
Another PDF-documented Safety/Relief Valve catalog record. Review its own evidence and configuration boundary.
A42F46 Safety Relief Valve
Another PDF-documented Safety/Relief Valve catalog record. Review its own evidence and configuration boundary.
Buyer questions
A42Y Safety Relief Valve FAQ
These answers preserve the line between documented catalog evidence and project-specific selection.
What does the PDF catalog confirm for this product?
It confirms the product name A42Y Safety Relief Valve, its source series Safety Valve, the mapped product image and the catalog-label fields shown in the data table.
Which data still requires confirmation?
The open fields include Design / construction, Material descriptor, Actuation, Pressure descriptor, Size descriptor, Standard descriptor. Temperature, detailed materials, testing, dimensions, certification, price and lead time also require the offered product documents.
Can the catalog image be used as a final dimensional reference?
No. The image confirms catalog identity and appearance context only. Fabrication, installation and procurement must use the approved datasheet and order drawing.
What should be included in the RFQ?
Send the required valve function, medium, size, pressure, temperature, connection, materials, actuation, quantity, document list and applicable inspection or witness requirements.
Technical inquiry
Request a configuration review for A42Y Safety Relief Valve
Reference this catalog identity and send the operating data below. Lianggong can then confirm the offered configuration, documentation scope and commercial terms without turning unknown fields into assumptions.
- Valve function and service medium
- DN/NPS, PN/Class, operating and design temperature
- Connection, body/trim/seat materials and corrosion allowance
- Actuation, fail position, utilities and control signal
- Quantity, drawing, testing, inspection and certificate requirements