{"id":8282,"date":"2026-05-26T18:17:04","date_gmt":"2026-05-26T18:17:04","guid":{"rendered":"https:\/\/www.yunrui-controls.com\/?p=8282"},"modified":"2026-05-26T18:17:04","modified_gmt":"2026-05-26T18:17:04","slug":"rosemount-304-305-306-valve-manifold-complete-guide","status":"publish","type":"post","link":"https:\/\/www.yunrui-controls.com\/ms\/rosemount-304-305-306-valve-manifold-complete-guide\/","title":{"rendered":"Rosemount 304\/305\/306 Valve Manifold Complete Guide"},"content":{"rendered":"
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Working Principles, Configuration Types, Industrial Applications, and Selection Guidelines<\/p>\n<\/div>\n

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Penilaian Tekanan<\/h3>\n

689 bar<\/p>\n

10,000 psi max<\/p>\n<\/div>\n

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Julat Suhu<\/h3>\n

-18\u00b0C to 538\u00b0C<\/p>\n

Full spectrum coverage<\/p>\n<\/div>\n

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Pilihan Bahan<\/h3>\n

316\/316L<\/p>\n

C-276, 400 available<\/p>\n<\/div>\n<\/div>\n

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In industrial process measurement and control, valve manifolds<\/strong> serve as critical supporting components for pressure, differential pressure, flow, and level transmitters. They perform essential functions including medium isolation, pressure balancing, venting\/draining, and online calibration\u2014directly determining the stability, safety, and maintenance convenience of the measurement system.<\/p>\n

Emerson Rosemount 304\/305\/306 series valve manifolds<\/strong>, with their integrated design, comprehensive configurations, and stringent quality standards, have become the mainstream choice for industrial applications worldwide. This guide provides comprehensive analysis of their working principles, core advantages, application scenarios, and usage specifications.<\/p>\n

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Product Overview: Three Series for All Scenarios<\/h2>\n

Rosemount 304\/305\/306<\/strong> valve manifolds are factory-assembled, leak-tested, and calibrated complete assemblies. They are divided into three main types\u2014integrated, direct-connect, and conventional\u2014to suit different transmitter structures and installation requirements.<\/p>\n\n\n\n\n\n\n\n
Model<\/th>\nJenis<\/th>\nPositioning<\/th>\nSambungan<\/th>\nCompatible Transmitters<\/th>\n<\/tr>\n<\/thead>\n
305<\/td>\nIntegrated Manifold<\/td>\nCoplanar\/Traditional Flangeless<\/td>\nInternal Thread NPT, No Flange Required<\/td>\n3051\/3051S Coplanar DP, Multivariable<\/td>\n<\/tr>\n
306<\/td>\nDirect-Connect Manifold<\/td>\nThread Direct Connection<\/td>\nExternal\/Internal Thread NPT<\/td>\nDirect-Connect Pressure, Wireless Pressure<\/td>\n<\/tr>\n
304<\/td>\nConventional Manifold<\/td>\nFlange Connection Traditional<\/td>\nFlange \u00d7 Flange \/ Flange \u00d7 NPT<\/td>\nTraditional Flange Transmitters, Wafer Optional<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

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Working Principles: 2\/3\/5 Valve Configurations<\/h2>\n

Valve manifolds achieve four core operations through multi-valve coordination: medium isolation, pressure balancing, venting\/draining, and online calibration<\/strong>. Different valve counts correspond to different operating logic:<\/p>\n

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2-Valve Manifold<\/h3>\n

Gauge \/ Absolute Pressure<\/p>\n

Structure:<\/strong> 1 Isolation Valve + 1 Vent\/Drain Valve<\/p>\n

The isolation valve cuts off the process medium from the instrument channel; the vent\/drain valve enables pipeline evacuation and instrument calibration. Suitable for gauge pressure and absolute pressure transmitters.<\/p>\n<\/div>\n

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3-Valve Manifold<\/h3>\n

Differential Pressure Standard<\/p>\n

Structure:<\/strong> 2 Isolation Valves + 1 Balance Valve<\/p>\n

The two isolation valves respectively control the high\/low pressure process interfaces; the balance valve connects the high and low pressure chambers to achieve zero-point balance, preventing transmitter diaphragm damage from differential pressure overload.<\/p>\n<\/div>\n

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5-Valve Manifold<\/h3>\n

High-Precision \/ Natural Gas<\/p>\n

Structure:<\/strong> 2 Isolation + 1 Balance + 2 Vent\/Drain<\/p>\n

Building on the three-valve configuration, adding bilateral independent venting enables full-process controlled venting\/draining and online calibration. Suitable for natural gas and high-precision process applications.<\/p>\n<\/div>\n<\/div>\n

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Natural Gas Dedicated Configuration<\/h4>\n

Features dual balance valves for enhanced leak protection; wide handle, soft valve seat, and large orifice design to reduce clogging risk, meeting stringent natural gas metering requirements.<\/p>\n<\/div>\n

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Core Features: Safety, Reliability, Easy Maintenance<\/h2>\n

1. Integrated Design, Significantly Reduced Leak Points<\/h3>\n

Yang 305 integrated manifold<\/strong> uses flangeless direct connection, reducing leak points by 50%<\/strong> compared to conventional flange connection solutions. The structure is more compact and lighter, adaptable to both vertical and horizontal process connections.<\/p>\n

2. Compliant Materials, Corrosion Resistant<\/h3>\n

Wetted materials are primarily 316\/316L stainless steel<\/strong>, with optional Alloy C-276 and Alloy 400. Certified to NACE MR0175\/ISO 15156<\/strong> standards, suitable for sour gas and corrosive applications.<\/p>\n

3. Wide Temperature and Pressure Range<\/h3>\n\n\n\n\n\n\n\n
Parameter<\/th>\nSpesifikasi<\/th>\n<\/tr>\n
Maximum Pressure Rating<\/strong><\/td>\n689 bar (10,000 psi)<\/td>\n<\/tr>\n
Julat Suhu<\/strong><\/td>\n-18\u00b0C ~ 538\u00b0C<\/td>\n<\/tr>\n
Packing Options<\/strong><\/td>\nPTFE \/ Graphite<\/td>\n<\/tr>\n
Valve Seat Options<\/strong><\/td>\nIntegral \/ Soft Seat<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

4. Pre-Assembled and Calibrated, Ready for Installation<\/h3>\n

Factory completion of assembly, seal testing, and calibration enables direct field installation, significantly shortening construction cycles and reducing installation error rates.<\/p>\n

5. Maintenance-Friendly, Supports Online Calibration<\/h3>\n

Without disassembling the transmitter, zero-point calibration, medium evacuation, and instrument maintenance can be completed through the vent valves and balance valve, reducing downtime.<\/p>\n

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Industry Applications<\/h2>\n
Minyak & Gas<\/span>
\nChemical & Refining<\/span>
\nPenjanaan Kuasa<\/span>
\nRawatan Air<\/span>
\nMetallurgy<\/span>
\nPapermaking<\/span><\/div>\n

Oil & Natural Gas:<\/strong> Oil and gas extraction, gathering and transportation, natural gas metering. Suitable for sour gas, high-pressure applications. The dedicated five-valve manifold design ensures metering accuracy and safety.<\/p>\n

Chemical & Refining:<\/strong> Pressure\/differential pressure\/flow measurement in high-temperature, high-pressure, corrosive media. Corrosion-resistant materials and sealing solutions provide stable and reliable performance.<\/p>\n

Power & Energy:<\/strong> Compliant with ASME B31.1<\/strong> power piping specifications. Suitable for steam, water, and oil systems, used for boiler and heat exchange equipment monitoring.<\/p>\n

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Installation and Usage Guidelines<\/h2>\n

Installation Specifications<\/h3>\n