Autochangeover

A compact, modular semi‑automatic changeover panel engineered to deliver uninterrupted high‑purity gas supply by switching from a Primary to a Reserve cylinder/bundle when the primary source falls below a user‑set threshold. The operator selects the priority bank (left/right) manually; the panel performs pneumatic changeover automatically via differential pressure logic. Designed for trace‑level cleanliness, ultra‑low leak rates, and repeatable outlet pressure across a broad flow range.

Key Benefits

• Zero‑downtime changeover with clear bank status indication

• Cross‑industry compliance ready components and build options

• Scalable: single‑line, dual‑line, and multi‑gas manifolds; high‑flow variants

• Serviceable with modular valve/regulator cassettes

• Safety‑first: integral relief, slam‑shut (option), line isolation, and purge

•  Typical Applications

• Automotive / Engine Emissions: zero/span calibration gases, burner air, low‑ppm NO/CO/HC blends, oxidizer/fuel switchover

• Pharmaceutical: process N₂, sterile air, CO₂ for incubators/bioreactors, O₂ for culture; cleanroom purges

• CVD/PVD & Diamond: UHP H₂, N₂, Ar, He, CH₄, BCl₃*, Cl₂

• Semiconductor (UHP):SiH₄* (with external safety), inert/oxidizer panels, analytical carrier gases, purge panels

• Aviation/MRO: O₂/N₂ service carts, leak‑check benches, inerting

• Welding/Cutting: O₂, Acetylene*, LPG*, Ar/CO₂ mixes; industrial series only

• Medical: O₂/N₂O/Air/CO₂ distribution headers (regional standards options)

• Automotive Emissions: offer dual‑stage regulation for ultra‑stable span gases; add 0.5 µm filter at outlet; incorporate bank‑empty contact to LIMS.

• Pharma: choose HP‑I with electropolished tubing and 316L wetted path; cradle‑to‑panel purge for bioreactor CO₂.

• CVD/PVD/Nano/Diamond: UHP‑S with VCR ends; specify compatible alloys (e.g., Hastelloy) for halides; N₂ purge block and interlocked vent.

• Semiconductor UHP: UHP‑S with diaphragm valves, EP 10 µin, 1×10⁻⁹ leak spec, particle & moisture certs.

• Aviation: oxygen‑service brass or SS; shock‑mounted panel; MIL‑style connectors for transmitters.

• Welding/Cutting: HF‑X with high‑flow regulators, slam‑shut, arrestors; oxygen‑cleaning mandatory for O₂.

• Medical: dual header with automatic changeover; color‑coded bank ID; alarm contacts compatible with area alarm panels; use medical gas specific outlets and labels

Gas Semi-Auto Changeover Panel

Mechanical, Power-Free Continuous Gas Supply Solution

Overview

The Mechanical Gas Semi-Auto Changeover Panel ensures an uninterrupted gas supply by automatically switching between two gas sources (Primary and Standby) based on pressure differences. This fully mechanical system operates without electrical power, making it perfect for environments with unreliable or no electricity.

Key Features :- 

• Fully Mechanical Operation – No electrical components; works solely on gas pressure.
• Automatic Switchover – Switches to standby source when primary pressure drops.
• Two-Side System – Primary source active while standby remains in reserve.
• Manual Override Option – Allows manual switching when needed.
• No External Power Required – Ideal for remote or hazardous areas.
• Durable & Low Maintenance – Simple design with minimal moving parts.
• Pressure Gauge Indicators – Monitors gas pressure on both sides.

How It Works 

• Primary Side Active: Gas flows from the primary source at normal pressure.
• Pressure Drop Detection: When primary pressure falls (low gas), the system triggers a switch.
• Automatic Changeover: The mechanical valve shifts gas flow to the standby source, maintaining supply.
• Vice Versa Operation: Once primary side is refilled and pressure stabilizes, switch back happens automatically or manually.

Applications

• LPG & CNG Gas Systems
• Commercial & Industrial Gas Supply
• Restaurants & Catering Facilities
• Rural & Off-Grid Locations
• Medical Gas Systems (Oxygen, Nitrogen, etc.)

Benefits

• No Electricity Needed – Operates independently of power supply.
• Fail-Safe Operation – Ensures continuous gas flow without interruption.
• Cost-Effective – Low maintenance with no electrical parts.
• Reliable in Harsh Environments – Suitable for outdoor and high-risk locations.

Why Choose Our Mechanical Changeover Panel?

• Proven Reliability with a simple, effective design.
• Zero Power Dependency—ideal for off-grid applications.
• Easy Installation & Maintenance—no wiring or sensors required.