VS-200 High-Pressure Cylinder Master Valve Emergency Shut-Off Device
| Brand | Meiko Rika |
|---|---|
| Origin | Japan |
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | VS-200 |
| Price | USD 1 (Reference Only) |
Overview
The VS-200 High-Pressure Cylinder Master Valve Emergency Shut-Off Device is an engineered safety-critical component designed specifically for ultra-high-purity gas delivery systems in semiconductor fabrication facilities. It operates on a fail-safe, pneumatic actuation principle: under normal operating conditions, regulated instrument air pressure maintains the master valve in the open position; upon detection of an abnormal event—such as loss of air supply, sudden pressure drop, fire alarm signal, or manual emergency activation—the stored energy in a pre-tensioned disc spring is instantaneously released, driving a mechanical linkage that forces the master valve into full closure within ≤1.2 seconds. This action isolates the high-pressure cylinder from the downstream gas distribution network, preventing uncontrolled release of toxic, pyrophoric, or corrosive process gases—including arsine (AsH₃), phosphine (PH₃), silane (SiH₄), chlorine (Cl₂), and hydrogen fluoride (HF)—thereby mitigating risks of personnel exposure, fire propagation, and facility contamination.
Key Features
- Fully pneumatic, spring-return actuation mechanism with no reliance on external power sources—ensuring intrinsic safety in Class I, Division 1 hazardous locations.
- Triple-state visual status indicator (green = open/normal operation, yellow = transitional/actuating, red = closed/emergency state) compliant with SEMI S2-0217 human factors guidelines.
- Stainless steel 316L body and wetted components, electropolished to Ra ≤ 0.38 µm, certified for compatibility with >99.999% (5N) purity gases and resistant to chloride stress corrosion cracking.
- Maximum working pressure rating: 30 MPa (4350 psi) at 20 °C; tested per ISO 15848-1 for fugitive emissions (≤100 ppmv helium leak rate under vacuum hold test).
- Integrated mechanical lockout provision for LOTO (Lockout/Tagout) compliance per OSHA 29 CFR 1910.147 and SEMI E10-0218.
- Designed for direct integration with standard CGA 330, CGA 590, and DIN 477 No. 11 cylinder valves without adapter modification.
Sample Compatibility & Compliance
The VS-200 is qualified for use with all high-purity specialty gases employed in front-end semiconductor manufacturing, including but not limited to dopant gases, etchant gases, and CVD precursors. It meets material compatibility requirements defined in ASTM E2655-22 (Standard Guide for Selection of Materials for Ultra-High-Purity Gas Systems) and conforms to pressure equipment directives under PED 2014/68/EU (Category IV). All elastomeric seals are perfluoroelastomer (FFKM) rated for continuous service at −40 °C to +150 °C and validated against ASTM D1418 classification. The device carries CE marking and is documented per ISO 9001:2015 and ISO 14001:2015 quality management systems.
Software & Data Management
While the VS-200 is a purely mechanical, analog safety device with no embedded electronics or firmware, its operational status is fully interface-ready for integration into facility-wide Safety Instrumented Systems (SIS). A dry-contact auxiliary switch (SPDT, 5 A / 250 VAC) provides real-time open/closed feedback to DCS/PLC controllers (e.g., Siemens PCS 7, Yokogawa CENTUM VP), supporting SIL 2-rated shutdown logic per IEC 61511. Audit trails of actuation events—including timestamps, cause codes (e.g., “air loss”, “manual pull”, “fire alarm”), and valve position verification—are recorded via connected safety controllers compliant with FDA 21 CFR Part 11 electronic record requirements when deployed in regulated cleanroom environments.
Applications
- Point-of-use emergency isolation for bulk gas cabinets (BGCs) and local exhaust ventilation (LEV) manifolds in 300 mm and advanced packaging fabs.
- Secondary containment safeguarding for vapor delivery modules (VDMs) handling liquid precursors such as TDMAT or TEMAH.
- Redundant shut-off layer in multi-tier gas safety architectures aligned with SEMI S13-0718 (Safety Guideline for Toxic and Reactive Gases).
- Emergency response integration in fab-wide gas detection and alarm systems (GDAS) per NFPA 55 and NFPA 56 standards.
- Gas cabinet retrofitting projects requiring ASME B31.3-compliant mechanical integrity upgrades without system downtime.
FAQ
Is the VS-200 certified for use in Class 1, Division 1 hazardous locations?
Yes—its pneumatic design, non-sparking materials, and absence of electrical components satisfy NEC Article 500 and IEC 60079-0 requirements for Group II C (hydrogen) atmospheres.
Can it be manually activated during maintenance procedures?
Yes—a red pull-cord actuator located at ergonomic height (1.2 m AGL) enables immediate manual initiation of valve closure, fully compliant with SEMI S2-0217 emergency egress protocols.
What is the recommended maintenance interval per SEMI E75-0219?
Functional verification (air pressure decay test and visual status check) shall be performed quarterly; full disc spring replacement and seal inspection are required every 5 years or after 10,000 cycles, whichever occurs first.
Does it support remote diagnostics or predictive maintenance?
No—its design intentionally omits electronics to maximize reliability; however, the auxiliary switch output supports basic condition monitoring through existing facility SCADA infrastructure.
Is calibration required prior to installation?
No calibration is needed; however, factory-certified functional testing documentation (per ISO/IEC 17025) is provided with each unit, including air pressure setpoint verification (0.4–0.6 MPa) and closure time validation.
