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Fisher R622, R642, and R652 Series Second-Stage Regulators – LP-Gas

The Fisher R600 Series is a line of UL-listed, direct-operated regulators specifically engineered to reduce the outlet pressure from a first-stage regulator in domestic and light commercial installations. Whether utilizing the standard R622 or the specialized angle-body R642 and R652 models, this series provides industry-leading safety and performance. These regulators ensure that downstream appliances receive a steady, low-pressure supply of propane while offering robust protection against overpressure events.
Brand: Fisher
Availability: In Stock
Origin: China

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Key Benefits and Advantages

  • Superior Relief Performance: Each regulator in the R600 series features a high-performance relief valve and a large 3/4-inch screened vent. This system is designed to limit downstream pressure to less than 2 psig (0.14 bar) even in severe overpressure situations.

  • Improved Accuracy: Advanced internal geometry and sensitive diaphragms provide better pressure regulation, ensuring consistent flame heights and efficient appliance operation.

  • 20-Year Recommended Replacement Life: Built for longevity, the R600 series is manufactured with high-quality materials to provide two decades of reliable service in outdoor environments.

  • Corrosion-Resistant Materials: Constructed with advanced coatings and materials that resist the degrading effects of weather and atmospheric salt, maintaining the integrity of the regulator over its entire lifespan.

  • Debris Protection: A standard inlet screen prevents pipe scale and contaminants from reaching the valve seat, reducing the risk of leaks or regulator failure.

  • Easy System Diagnostics: Integrated test ports allow technicians to perform pressure checks and system troubleshooting quickly and accurately without breaking piping connections.

  • Positive Drainage: The design ensures that moisture and condensation drain away from the critical internal components, preventing freeze-ups in cold climates.

Technical Properties

  • Capacity (R622): Designed for two-stage domestic applications up to 1,400,000 BTU per hour (15.8 SCMH).

  • Body Configurations:

    1. Type R622: Standard straight-through globe body.

    2. Type R642 and R652: Angle body and back-mounted designs for specialized piping and meter set configurations.

  • Overpressure Limit: Limits downstream pressure to 2 psig (0.14 bar) maximum during failure.

  • Safety Certification: UL listed for LP-Gas service.

  • Vent Size: Large 3/4-inch NPT screened vent for maximum relief capacity.

Field of Application

The R600 Series is the standard for modern propane installations. Its versatility in body style allows it to be used in everything from simple residential homes to complex commercial kitchen manifolds.

Primary Industries and Uses:
  • Domestic Propane Service: Reducing intermediate pressure (typically 10 psi) to inches of water column for home appliances.

  • Light Commercial Installations: Gas supply for small businesses, laundry facilities, and restaurants.

  • Multi-Appliance Systems: Handling high BTU loads for large homes with multiple fireplaces, furnaces, and water heaters.

  • Manufactured Housing: Angle-body R642/R652 models are ideal for tight mounting requirements against walls or under structures.

Specification

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Configured Models

Available Certificates

We provide comprehensive documentation support strictly mapped to your model codes. From standard Q4 (Calibration Certificate), Q8 (Material Traceability), and P1 (Hydrostatic Testing) to specialized Chamber of Commerce (COI) authentication, we ensure every detail meets your project’s compliance and traceability requirements.

FAQ

Q: Which brands and models do you offer?

A: We specialize in industrial automation instruments such as pressure transmitters and flow meters from brands like Rosemount, Yokogawa, and Micro Motion. Additionally, we can help source other related products globally based on your specific requirements.

A: We offer global shipping, covering Southeast Asia, the Middle East, Europe, South America, North America, and many other regions. Specific logistics solutions can be customized based on customer requirements.

A: The lead time for product delivery varies depending on the product type, quantity, and shipping method. Our sales team will provide you with an estimated delivery time frame based on your specific requirements.

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