Fisher Type 749B Changeover Manifold Assemblies | Automatic Gas Changeover System | OEM Supplier

Fisher Type 749B Changeover Manifold provides automatic gas source switching, stable outlet pressure, and high operational reliability for laboratory, medical, and industrial gas systems.

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Description

🌟 Product Introduction

🔹 Fisher Type 749B Changeover Manifold is designed to automatically switch between gas cylinders when the primary supply is depleted, ensuring continuous and stable gas delivery without manual intervention.

🔹 This model is especially suitable for applications where uninterrupted gas supply is critical, such as laboratories, medical gas systems, and industrial gas networks.

🔹 With a compact structure and precise pressure control, the 749B helps users reduce downtime, avoid pressure fluctuations, and improve system reliability.

Fisher Type 749B Changeover Manifold Assemblies

⚙️ Key Features

🔹 Automatic Changeover Design – Ensures seamless switching between primary and reserve gas sources.

🔹 Stable Outlet Pressure – Maintains consistent downstream pressure for sensitive equipment.

🔹 High Inlet Pressure Capacity – Supports inlet pressure up to 250 psig / 17.2 bar.

🔹 Compact & Space-Saving Structure – Ideal for installations with limited space.

🔹 Reliable Performance – Built for long-term operation in demanding gas systems.

🏭 Applications

🔹 Ideal for laboratories, hospitals, gas distribution stations, and industrial production lines.

🔹 Perfect for users who require continuous gas supply without manual cylinder switching.

🔹 Suitable for B-end system integrators and C-end equipment operators who value safety, stability, and operational efficiency.

🔹 Helps customers reduce operational risks and maintenance workload, especially in critical environments.

📊 Technical Parameters

Body Size	1/2 NPT
Maximum Inlet Pressure	250 psig / 17.2 bar
Maximum Emergency Outlet Pressure	Type 64: 220 psig / 15.2 bar HSRL Final Stage: 3 psig / 0.21 bar
Standard Outlet Setting	Supply: 15 psig / 1.0 bar Reserve: 5 psig / 0.34 bar
Temperature Range	-20°F to 160°F / -29°C to 71°C

🤝 B2B Cooperation & Support

🔹 We understand that wrong selection of changeover systems can lead to gas interruptions and safety risks.

🔹 Our team helps you match the correct model, pressure range, and configuration for your project.

🔹 We support OEM orders, bulk supply, and technical consulting, helping you reduce sourcing risks and project delays.

📩 Contact us for fast quotation, technical confirmation, and reliable long-term supply.

Packing & Delivery

1. Precision Packing

At INSTRUBEST, ensuring that your instruments and equipment arrive safely is our top priority. We take the following measures to protect each product:

High-Quality Packing Materials: We use durable materials such as bubble wrap, foam padding, and sturdy cartons to shield products from shocks and vibrations during transit.
Custom Packaging: Tailored packaging solutions are designed to fit the specific needs of different types of instruments and equipment, ensuring maximum protection.
Labels and Markings: All packages are clearly labeled with handling instructions and precautions to minimize the risk of damage during shipping.

2. Rigorous Quality Inspection

Before shipment, our quality control team performs a thorough inspection of each product to ensure that it meets our high standards. We are committed to addressing any potential issues to guarantee the performance and integrity of your equipment.

3. Fast Shipping

We understand that timely delivery is crucial for your business, which is why we offer efficient shipping services:

Processing Time: Orders are processed and prepared for shipment within 24 hours of confirmation.
Shipping Options: We provide a range of shipping options, including standard delivery, expedited services, and international shipping, to suit your needs.
Tracking Services: Once shipped, you will receive a tracking number to monitor the status of your order in real-time.

4. Global Delivery

We are dedicated to delivering products to locations around the world. No matter where you are, we ensure that your instruments and equipment reach you safely and promptly.

5. After-Sales Support

If you encounter any issues with packaging or delivery, please contact our customer service team. We offer comprehensive after-sales support to address any concerns and ensure your complete satisfaction.

FAQ

Q: How long will you give me the reply?

A: We will reply to you as soon as we see the information

Q: What is the delivery time?

A: Our delivery time is within 3-7 days after we get your payment; for large qty mass orders, the time should be confirmed again for you

Q: How about your package?

A: Do not worry about the package, we have rich experience in packing, and all our package is wooden case package .

Q: How about the payment terms ?

A:You can choose T/T.

Q: Do you provide samples ?

A: Yes,we have materials in stock to help you to get the samples as soon as we can.

Q: What is the MOQ?

A:1PC.

Q: Can I get a lower price if I order large quantities?

A: Yes, cheaper prices with more bigger size orders.