ZBA42Y-160/320 C/P/R Spring Full Lift Enclosed High Pressure Safety Valve

Spring Full Lift Enclosed High Pressure Safety Valve for high-pressure gas equipment and pipelines requiring enclosed full-lift overpressure protection. Key selection data include DN20-DN50 for PN160/PN320; DN32 reference shown for PN400 in catalog table, PN160 and PN320, with PN400 reference row in dimension table, 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.

Technical Specifications and Selection Data

Product Model

ZBA42Y-160/320 C/P/R

Size Range

DN20-DN50 for PN160/PN320; DN32 reference shown for PN400 in catalog table

Pressure Rating

PN160 and PN320, with PN400 reference row in dimension table

Temperature Range

Up to 200 deg C

Applicable Media

Air, N2-H2 mixed gas and corrosive gases for P/R configurations

Connection Type

High-pressure flanged inlet and outlet

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: A42Y = flanged full-lift enclosed safety valve with hard alloy sealing surface; 160/320 identify high PN rating; C/P/R identify body material code.

Typical application: high-pressure gas equipment and pipelines requiring enclosed full-lift overpressure protection

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 25. Verify critical dimensions against the approved order drawing before fabrication or piping release.

Catalog page 025 – Parameter Table 1
Type / Model	Nominal Diameter (DN)	do	Column 4	Column 5	Column 6	Column 7	Z-Qd	Column 9	dl	Column 11	Column 12	Column 13	KI	Column 15	bl	Column 17	Column 18	Column 19
A42Y-160	1 5		20	M24x2	95	60	3 8	20	29	37	M42x2	1 15	80	4.18	22	95	100	263
A42Y-160	20		27	M33x2	105	68	46099	20	29	37	M42x2	1 15	80	46130	22	95	100	263
A42Y-160	25		28	M33x2	105	68	46099	20	40	47	M52x2	165	115	6.26	28	135	130	314
A42Y-160	32		37	M42x2	115	80	46130	22	50	59	M64x3	165	115	46199	32	150	150	390
A42Y-160	40	20	47	M52x2	165	1 15	6 6	28	65	74	M80x3	200	145	6.29	40	180	165	495
A42Y-160	50	25	59	M64x3	165	1 15	46199	32	80	94	100x	225	170	12206	45	190	190	510
A42Y-320	1 5		27	M33x2	105	68	3 8	20	29	37	M42x2	1 15	80	4.18	22	95	100	263
A42Y-320	20		32	M36x2	110	75	46099	22	29	37	M42x2	1 15	80	46130	22	95	100	263
A42Y-320	25		35	M42x2	115	80	46130	22	40	47	M52x2	165	115	6.26	28	135	130	314
A42Y-320	32		41	M48x2	135	95	46134	25	50	59	M64x3	165	115	46199	32	150	150	390
A42Y-320	40		58	M64x3	165	1 15	6 6	32	65	74	M80x3	200	145	6.29	40	180	165	495
A42Y-320	50	23	70	M80x3	200	145	46202	40	80	94	100x	225	170	12206	45	190	190	510
A42Y-400	32		41	M48x2	135	95	46134	25	50	59	M64x3	165	115	6.26	32	150	150	397

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: WCB carbon steel, ZG15Cr1Mo alloy steel, ZG15Cr1Mo1V/ZG20Cr1Mo1V high-temperature alloy steel, CF8/304, CF8M/316 or CF3M/316L according to model body code and service. Trim and internals: 20Cr13, 304, 316, 316L or alloy trim according to body code and medium; corrosive or high-temperature service can use stainless or alloy internals. 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 25. 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.

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