Fisher Type H800 Relief Valve | Original Emerson Safety Relief Valve | Competitive Price & Fast Delivery

Original Fisher Type H800 relief valve for gas and air systems, featuring compact design, fast response, stable reseating, and reliable overpressure protection. Ideal for instrument and low-flow safety applications.

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Description

Fisher Type H800 Relief Valves

🔷 ◆ Product Overview

The Fisher Type H800 Relief Valve is a compact, non-adjustable safety relief valve designed to protect gas and air systems from overpressure. With its lightweight body, fast response, and stable reseating performance, it is ideal for small pipelines, instruments, and control circuits where precise pressure protection is required.

Built to Emerson standards, this model delivers reliable emergency pressure release while minimizing system downtime and maintenance costs.

🔷 ◆ Key Advantages

Non-adjustable preset design ensures stable and tamper-proof protection
Fast start-to-discharge response for sudden pressure surges
Compact 1/4 NPT connection, easy to install in tight spaces
Wide operating temperature range for industrial environments
Low reseat pressure reduces unnecessary venting
Lightweight structure for instrument and panel mounting

🔹 ● Typical Applications

The Fisher Type H800 is widely used in:

Gas pressure regulating stations
Instrument air systems
Small gas pipelines and skids
Control panels and analyzers
Laboratory gas supply systems
Industrial safety venting lines

It is especially suitable for low-flow systems requiring high safety reliability.

🔷 ◆ Technical Specifications

Parameter	Specification
Product Model	Fisher Type H800 Relief Valve
Body Size & End Connection	1/4 NPT
Flow Coefficient (Cv)	Wide-Open Cg 55, Km 0.79
Maximum Allowable Inlet Pressure	250 psig / 17.2 bar
Relief Pressure Range	Non-adjustable, start-to-discharge: 39–44 psig / 2.7–3.0 bar
Reseat Pressure	35 psig / 2.4 bar or higher
Temperature Range	-20 to 150°F / -29 to 66°C
Approximate Weight	5 oz / 140 g
Additional Information	Refer to Emerson technical documentation

🔷 ◆ Why Choose Us

We supply 100% genuine Fisher valves from Emerson with full traceability and technical support.

✔ Original packaging & documentation

✔ Competitive distributor pricing

✔ Fast quotation & delivery

✔ Export-ready logistics

✔ Professional selection assistance

We don’t just sell products — we help you reduce risk, save time, and win projects.

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.