VMB Valve Box—The Distribution Hub of Special Gas Supply Systems

Summary

In high-end manufacturing sectors such as semiconductors, photovoltaics, and new materials, a stable supply of specialty gases directly determines process yield and production safety. From the gas source to the point of use, gases must undergo multi-stage processing and distribution, and the VMB (Valve Manifold Box) serves as a critical link in this chain.

Part 01 Basic Features of VMB

                               Wofly Technology Semi-Automatic VM

As a terminal control device installed near gas-consuming equipment, the VMB is designed around the four core objectives of “distribution, regulation, isolation, and safety.” Its basic functions can be summarized as follows:

1. Gas Distribution Function

It distributes specialty gases supplied from a single source to multiple branches according to production needs, simultaneously providing independent gas supply to multiple pieces of equipment to achieve a “one-to-many” gas supply topology.

2. Pressure Regulation Function

The output pressure for each branch line can be independently adjusted to meet the varying gas pressure requirements of different process equipment, ensuring that each piece of equipment receives the appropriate supply parameters.

3. Branch Line Isolation Function

Each branch line is equipped with an independent shut-off mechanism. When a single branch line is undergoing inspection or maintenance, normal gas supply to other branch lines remains unaffected, ensuring the overall operational continuity of the production line.

4. Purge and Replace Function

Prior to maintenance operations, the target branch can be purged and replaced with an inert gas to expel residual toxic, hazardous, flammable, or explosive gases from the piping, thereby reducing the risk of exposure for personnel.

5. Status Monitoring Function

The system monitors the pressure and valve status of each branch in real time. In the event of an anomaly, it automatically triggers interlock protection to shut off the faulty branch, preventing the accident from escalating and ensuring the safe operation of the system.

                                                                                     Internal Piping Layouts for Various VMB Valve Boxes

Part 02 The Role of VMB in Special Gas Systems

                  Applications of VMB Valve Boxes in Special Gas Systems

The VMB is not merely an isolated valve manifold; rather, it serves as a critical link connecting the gas source to the end-use point in a specialty gas system. Its value at the system level is primarily reflected in the following five aspects:

01 An Intermediate Node Connecting the Gas Source to the End-Use Point

As a distribution hub between the specialty gas cabinet (GC) or bulk gas supply system (BSGS) and production equipment, the VMB shortens the length of the end-use gas supply piping, thereby reducing pressure drop and the risk of contamination associated with long-distance transmission.

            Single-Cylinder Specialty Gas Cabinet and Semi-Automatic VMB

02 The Final Line of Defense for Gas Purity

The internal piping system features a high-purity design that structurally prevents secondary contamination, ensuring that high-purity specialty gases maintain their ultra-high purity until they are delivered to the process equipment.

                 EP-Grade Electrolytically Polished Stainless Steel Piping

03 Improve Overall System Availability

In the event of a single-branch failure or scheduled maintenance, the remaining branches remain unaffected, ensuring continuous production line operation and minimizing losses caused by full-line shutdowns due to localized maintenance.

04 Minimize the Scope of Safety Risks

By moving the control boundary closer to the gas-using sites, the corresponding branch can be quickly shut off in the event of a leak, limiting the impact to the smallest possible area and reducing the consequences of safety incidents.

05 Adapting to the Flexible Requirements of Diverse Processes

A single gas source can simultaneously meet the supply requirements of multiple pieces of equipment with different processes, enhancing the overall flexibility and resource utilization of the gas supply system while reducing system construction costs.

Part 03 Wofei Technology’s Expertise and Quality Assurance

                                  Wofly Technology Workshop Showcase

As a one-stop solution provider for gas application system engineering, Shenzhen WoFei Technology Co., Ltd. has accumulated extensive technical expertise and project experience in the specialty gas sector. The quality assurance system for its VMB products can be understood from the following five perspectives:

Deep Technical Expertise in the Specialty Gas Sector

Wofly Technology is a National High-Tech Enterprise with 15 years of experience in specialty gas system R&D and engineering. Its products are distributed across 26 countries and regions worldwide, serving numerous customers in the semiconductor and high-end manufacturing industries.

         Configuration of the VMB Explosion-Proof Positive-Pressure Cabinet

End-to-End, One-Stop Solutions

We provide a full range of services—from technical consulting, overall planning, system design, equipment selection, prefabricated components, and on-site installation to comprehensive testing—to ensure that our system solutions precisely meet our customers’ actual needs.

          Schematic Diagram of a Specialty Gas System (For Reference Only)

Stringent Material and Component Standards

VMB products feature internal piping made of SUS316L clean-grade stainless steel, and the main valve components are sourced from leading international brands, ensuring gas purity and long-term operational reliability right from the source.

                                            316L Stainless Steel Piping

Multi-Level Safety Interlock Design

The semi-automatic VMB integrates a PLC control system and a touchscreen HMI, featuring safety interlocks, fault alarms, and purging and replacement functions, balancing production efficiency with operator safety.

                                          VMB Control Panel Overview

Authoritative Certifications and Quality Systems

Our products hold multiple national patents and international certifications such as CE and RoHS. We strictly adhere to the ISO 9001 quality management system, and every unit undergoes rigorous testing before leaving the factory.

                                                             Certification