Industrial Explosion Isolation Valve

Product Details

Product Introduction

Within interconnected processing systems, vessels like dust filters and storage silos are commonly linked via conveyance piping. Should a deflagration event occur in one unit, the resultant flame front and overpressure can propagate through these connections, triggering devastating secondary or tertiary explosions in associated equipment. The installation of an industrial-grade explosion isolation valve is crucial to arrest this propagation, shielding interconnected devices and plant areas to prevent catastrophic chain reactions.

This heavy-duty explosion isolation valve serves as a critical safety component within industrial ductg networks. Its primary role is to swiftly halt the reverse travel of explosion flames and pressure waves through pipelines, thereby ensuring the protection of downstream assets and personnel. The following provides comprehensive details on this valve's capabilities.

Key Attribute

Nominal Diameter                           Length × Width × Height (mm)              Explosion Protection Rating

DN100                                                  409 × 324 × 497                                            ST1, ST2    

DN150                                                  587 × 386 × 550                                            ST1, ST2    

DN200                                                  587 × 386 × 550                                            ST1, ST2    

DN250                                                  628 × 443 × 624                                            ST1, ST2    

DN300                                                  778 × 507 × 693                                            ST1, ST2    

DN350                                                  868 × 641 × 788                                            ST1, ST2    

DN400                                                  946 × 641 × 813                                            ST1, ST2    

DN450                                                 1093 × 795 × 922                                          ST1, ST2    

DN500                                                 1093 × 795 × 922                                          ST1, ST2    

DN550                                                 1240 × 885 × 1020                                        ST1, ST2    

DN600                                                 1240 × 885 × 1074                                        ST1, ST2    

DN650                                                 1300 × 989 × 1191                                        ST1    

DN700                                                 1390 × 989 × 1191                                        ST1   

• Space-Efficient and Serviceable Design: Its compact footprint and modular design simplify integration into existing pipework and facilitate easier access for routine inspections or part replacement.

• Advanced Monitoring Options: Select models can be outfitted with integrated sensor suites and communication modules, allowing for real-time valve health and position monitoring via plant control systems.

Superior Containment Performance
The valve's meticulously calibrated mechanical design and highly responsive pressure trigger ensure near-instantaneous closure upon detecting a precursor pressure spike. With a demonstrated isolation efficiency exceeding 99%, it dramatically mitigates the risk of explosion escalation. For example, in a chemical powder processing line, an isolation valve can instantaneously seal off a duct section following a primary event, containing the hazard within a designated safe zone.

Engineered for Durability and Uptime
Manufactured from premium, corrosion-resistant alloys, the valve is built to withstand the rigors of continuous industrial operation. This robust construction translates to extended service intervals, reduced total cost of ownership through lower maintenance needs, and enhanced overall plant safety reliability.

Unobstructed Process Flow
During normal operation, the valve disc is held fully open by a low-force retention system, presenting minimal flow resistance. This ensures optimal system efficiency for material transport. The one-way action only engages to block reverse flow during an explosive event, leaving regular forward process flow unaffected.

Explosion-Proof Junction Enclosure
Explosion-Proof Pressure Trip Sensor

Operational Principle

In a dust or gas explosion, the initial pressure wave (shockwave) travels faster than the following flame. The isolation valve is triggered by this leading shockwave. Upon detection, its actuation system drives the valve disc to its closed position where it is mechanically latched, forming a solid seal that blocks the subsequent flame and remaining pressure wave from passing through.

Following a safety event, the valve can be easily reset manually after the situation is secured. A straightforward visual inspection and functional check are recommended before returning the valve to service. Under standard operating conditions, an integrated low-energy actuator maintains the disc in the open position.

Dimensional and Rating Specifications

Available Accessories

Pressure Detection Sensor: High-Energy (HE) Type

Installation, Use & Maintenance Guidelines

• Pre-Startup Check: Prior to energizing any system fan or conveyor, verify that the isolation valve is in the fully open position. Starting equipment against a closed valve can cause severe damage.

• Routine Inspection: After commissioning, establish a monthly inspection schedule to check the valve's mechanical condition, latch mechanism, and disc freedom of movement. Increase inspection frequency in high-cyclic or harsh environments.

• Post-Maintenance Procedure: Following any servicing or inspection that involves disassembly, always perform a leak-tightness verification test per the manufacturer's instructions and document the results for safety records.

Corporate Information

Shandong Zhengda Weiye Safety Equipment Co., Ltd. operates as an innovation-driven enterprise, holding multiple patents and focusing on delivering advanced pressure relief and explosion mitigation solutions to industry.
Our core product portfolio encompasses rupture discs (bursting discs), various safety and relief valves, tank conservation vents, flame arresters, comprehensive powder explosion protection systems, and specialty valves like bending pin types.
Headquartered in the industrial hub of Jinan, Shandong, our dedicated R&D and manufacturing facilities focus on safety-critical pressure management and explosion protection devices. We have established a strong track record by providing technically sound solutions to a wide array of domestic industrial clients. As a full-service provider, we hold all necessary certifications including the PRC Special Equipment Manufacturing License, ISO 9001:2015 Quality Management System certification, and relevant national explosion-proof product approvals.