ZBNJ Series Safety Valve with Jacket

Safety Valve with Jacket for polyester, ethylene, urea and similar process units where the relief valve body and flanges need heat preservation. Key selection data include Catalog pages include ZBNJ dimensions and standard parameter tables, Class/PN rating by ZBNJ code and flange class selection, For heat-preserved process fluids; confirm by jacket, material and medium, materials, connection standard and set pressure.

最终整定压力、认证泄放量、材质代号及连接标准须以经批准的参数表为准，并在采购前予以确认。.

技术参数与选型数据

产品型号

ZBNJ Series

尺寸范围

Catalog pages include ZBNJ dimensions and standard parameter tables

压力等级

Class/PN rating by ZBNJ code and flange class selection

温度范围

For heat-preserved process fluids; confirm by jacket, material and medium

适用介质

Polyester, ethylene, urea and other media requiring heat preservation

连接类型

Jacketed flanged connection with thermal insulation inlet/outlet and optional flushing inlets

标准与合规

ISO 4126-1, API RP 520, API Std 526, API Std 527, ASME Boiler and Pressure Vessel Code Section VIII Division 1, and ASME B16.5 flange references where applicable.

工程解析：型号逻辑与应用边界

型号代码： ZBNJ = safety valve with jacket. Model code identifies size, orifice, flange class, material, cap and special configuration.

典型应用： polyester, ethylene, urea and similar process units where the relief valve body and flanges need heat preservation

排量审查： Balanced bellows protects set pressure from variable back pressure. Standard parameter pages should be used for final capacity and dimensions.

本产品系列不应仅依据型号、公称尺寸或压力等级进行选型。请确认泄放工况、所需泄放量、整定压力、操作裕量、温度、背压及实际连接标准。.

尺寸与选型指南

Critical dimensions are configuration-specific. Use the verified specification fields below for preliminary review and request the controlled GA drawing for final piping or fabrication approval.

RFQ checklist

询价清单：型号或阀门类型、DN/NPS、PN/Class、整定压力、泄放介质、工作温度、阀体及内件材质、进出口连接标准、阀帽/杠杆/先导选项、数量、图纸、证书及检验要求。.

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: Body material per ZBNJ material code; special materials available for urea and severe corrosion service. Trim and internals: Austenitic stainless trim with Stellite facing as standard; optional urea-grade 316L, duplex stainless steel and super duplex F51/F53/F55. Spring and stem: Alloy or stainless spring protected by bellows and bonnet construction.

Testing and inspection: Set pressure tolerance within +/-3 percent, overpressure and blowdown per ASME/API service, API 527 seat tightness, shell/seat test, material review and dimensional inspection according to the confirmed order.

Source and scope: product data is based on Zobai Safety Valve Product Catalog.pdf, catalog page 103-108. Project compliance remains subject to the approved datasheet, drawing, calculation and controlled certificates for the ordered configuration.

Review material traceability, type-test scope 和 project certificate requirements.

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常见问题

Safety Valve FAQs

What models are covered by this ZBNJ Series Safety Valve with Jacket page?