ZBA48SH-16/25/40/64/100 C/I/V; ZBA48TH-100; ZBA48SB-160 High Temperature and High Pressure Spring Full Lift Safety Valve

High Temperature and High Pressure Spring Full Lift Safety Valve for high-temperature steam equipment and pipelines requiring full-lift overpressure protection. Key selection data include DN25-DN250, confirm by model and pressure class, PN16, PN25, PN40, PN64, PN100 and selected high-pressure variants, 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.

Technical Specifications and Selection Data

Product Model

ZBA48SH-16/25/40/64/100 C/I/V; ZBA48TH-100; ZBA48SB-160

Size Range

DN25-DN250, confirm by model and pressure class

Pressure Rating

PN16, PN25, PN40, PN64, PN100 and selected high-pressure variants

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

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: A48SH/TH/SB identify high-temperature high-pressure spring full-lift safety valve variants; C/I/V identify material or temperature class.

Typical application: high-temperature steam equipment and pipelines requiring 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 35. Verify critical dimensions against the approved order drawing before fabrication or piping release.

Catalog page 035 – Parameter Table 1
Nominal Pressure (PN)	Nominal Diameter (DN)	do	Nominal Diameter (DN)	L	L1	Approx. H
6/25/40 1	25	15	32	110	95	395
6/25/40 1	40	25	50	120	1 10	418
6/25/40 1	50	32	65	135	120	525
6/25/40 1	50	32	80	135	120	525
6/25/40 1	80	50	100	170	135	675
6/25/40 1	100	65	125	205	160	748
6/25/40 1	100	65	150	205	160	748
6/25/40 1	150	100	200	230	210	1 135
6/25/40 1	200	125	250	290	310	1230
6/25/40 1	250	150	300	350	320	1285
64/100	40	25	50	135	120	518
64/100	50	32	65	160	130	625
64/100	50	32	80	160	145	600
64/100	80	50	100	175	160	740
64/100	100	65	125	220	200	920
64/100	100	65	150	220	200	920
64/100	150	90	200	280	280	1 128
64/100	200	125	250	300	295	1350
64/100	250	150	350	370	390	1440
ZBA48TH-100	50	32	80	160	145	580
ZBA48SB-160	80	40	150	215	210	820

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 carbon/alloy steel or stainless material selected by C/I/V service code. Trim and internals: High-temperature trim with hard alloy sealing surface for steam service. Spring and stem: High-performance spring selected and tested for high-temperature service.

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 35. 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.

ZBA46 Series Pilot Operated Safety Valves

Pilot operated safety valves for higher-pressure service requiring tighter sealing and stable set pressure performance.

ZBWA42 Series Bellows Balanced Safety Valves

Bellows balanced safety valves for back pressure applications where stable performance is important.

ZBA68 Series High Temperature Steam Safety Valves

High temperature steam safety valves for boilers, steam lines, and other elevated-temperature systems.

SVL488 Series Sanitary Safety Valves

Sanitary safety valves for hygienic process lines and cleaning systems requiring cleanable pressure protection.

FAQ

Safety Valve FAQs

What models are covered by this ZBA48SH-16/25/40/64/100 C/I/V; ZBA48TH-100; ZBA48SB-160 High Temperature and High Pressure Spring Full Lift Safety Valve page?