FISHER 1805-52P Gas Valve 10-50

( Brand: Fisher ), ( Manufacturer Part Number: 1805-52P ), ( Part Type: Valve ), ( Suitable Media: Fuel ), ( Unit Type: Unit ), ( Valve Operation: Solenoid ), ( Country Of Origin: Mexico )

Review FISHER Gas Valve 10-50 Psi

The **Fisher 1805-52P Gas Valve**, a robust and precision-engineered component from Emerson s Fisher brand, is a high-performance control valve designed specifically for demanding applications in the oil, gas, and petrochemical industries. This **direct-acting, pilot-operated gas valve** operates within a pressure range of **10 to 50 psi (0.7 to 3.5 bar)**, making it ideal for medium-pressure control systems where reliability and precise modulation are critical. Constructed from **carbon steel (ASTM A105 or equivalent)** with a **stainless steel trim (SS304 or SS316, depending on model variant)**, the valve is built to withstand harsh environments, including exposure to corrosive fluids, high temperatures, and fluctuating pressures. Its **pneumatic pilot system** ensures smooth, consistent operation, reducing wear and minimizing the risk of valve hunting or instability, which is particularly advantageous in processes requiring tight control over flow rates.

The **1805-52P** features a **single-seated design** with a **soft-seated or metal-to-metal sealing option**, depending on the application requirements, allowing for either leak-tight shutoff or improved durability in abrasive environments. Its **direct-acting pilot mechanism** eliminates the need for external power sources, simplifying installation and reducing system complexity, while its **fail-safe positioning** (either fail-open or fail-closed, configurable via pilot settings) enhances safety in critical applications. The valve s **modulating capability** enables precise flow regulation, making it suitable for processes such as **pressure reduction, backpressure control, or gas distribution systems** where incremental adjustments are necessary. Additionally, its **compact yet sturdy construction** allows for easy integration into existing piping systems, with standard **flanged connections (RF or RTJ, depending on the flange rating)** ensuring secure and leak-proof assemblies.

For enhanced durability, the **1805-52P** is available with optional **corrosion-resistant coatings** or **specialized trim materials**, such as **hardened stainless steel or ceramic inserts**, to extend service life in abrasive or erosive conditions. Its **pneumatic pilot actuator** is designed for compatibility with standard **12-28 psi (0.8-2 bar) air signals**, providing flexibility in control system integration. Whether deployed in **natural gas transmission, refinery off-gas systems, or industrial gas processing**, this valve delivers consistent performance, minimal maintenance requirements, and a long operational lifespan making it a trusted choice for engineers and operators demanding both efficiency and reliability in their control systems.

### **Pros and Cons of buying a Fisher 1805-52P Gas Valve (10-50 GPH)**

The Fisher 1805-52P is a widely used **thermostatic gas valve** designed for residential and light commercial applications, particularly in furnaces and boilers. Its key advantages include:

1. **Reliability and Durability** Fisher valves are known for their robust construction and long service life, especially in demanding HVAC systems. The 1805 series is a proven design with a strong reputation for consistent performance.

- Residential furnaces (natural gas or propane)

- Boilers with moderate heating demands

- Zoned heating systems where precise control is needed

3. **Thermostatic Operation** The valve modulates gas flow based on temperature demands, improving efficiency and comfort by maintaining consistent heating output.

4. **Compatibility with Common Systems** It works well with standard **natural gas (NG) or propane (LP)** setups, making it a flexible choice for retrofits or new installations.

5. **Modular Design** The 1805 series is part of a larger family of Fisher valves, meaning replacement parts and accessories are widely available.

6. **Energy Efficiency** By precisely controlling gas flow, it helps reduce wasted fuel, contributing to lower operating costs over time.

7. **Easy Installation and Maintenance** Fisher valves are designed with installer-friendly features, including clear wiring diagrams and straightforward calibration procedures.

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1. **Limited Flow Rate for Larger Systems** At only **10-50 GPH**, this valve is not suitable for high-capacity furnaces or commercial applications requiring larger gas inputs. Larger systems may need a higher-rated valve (e.g., 50-100 GPH or more).

2. **Potential for Wear Over Time** Like all mechanical components, the internal diaphragm and pilot assembly can degrade with age, leading to leaks or inconsistent performance. Regular maintenance is required to prevent failures.

3. **Sensitivity to Power Supply Issues** As a thermostatically controlled valve, it relies on consistent electrical power. Fluctuations or power outages can disrupt operation until the system resets.

4. **Cost of Replacement Parts** While Fisher valves are durable, if the valve fails, replacement parts (e.g., diaphragms, solenoids) can be expensive, especially if sourced from third-party suppliers.

5. **Learning Curve for Calibration** Improper calibration can lead to inefficient operation or safety hazards. Installers must follow precise steps to ensure the valve functions correctly with the thermostat and burner management system.

6. **Compatibility with Modern Smart Thermostats** Some newer smart thermostats may require additional wiring or adapters to work seamlessly with older Fisher valves, potentially adding complexity to the setup.

7. **Potential for Pilot Light Issues** If the valve is part of a system with a standing pilot, pilot light failures can occur, though this is more common with older models. The 1805-52P is generally more reliable than earlier Fisher designs.

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The **Fisher 1805-52P (10-50 GPH)** is a **high-quality, reliable gas valve** well-suited for **residential furnaces, small boilers, and light commercial heating systems** where precise gas modulation is required. Its **durability, efficiency, and compatibility with standard setups** make it a strong choice for many applications.

However, it is **not ideal for high-capacity systems** or environments where extreme wear and tear is expected without maintenance. The **cost of parts and potential calibration challenges** are minor drawbacks but can be mitigated with proper installation and regular upkeep.

- You are working on a **small to medium residential furnace or boiler** (10-50 GPH range).

- You prioritize **reliability, efficiency, and long-term performance**.

- You have access to **proper installation and maintenance support**.

- You need a **proven brand** with extensive availability of replacement parts.

- Your system requires **higher gas flow rates** (e.g., 50 GPH), in which case a **Fisher 1805-100P or similar higher-rated valve** may be necessary.

- You are working in a **commercial or industrial setting** where more robust valves (e.g., **Fisher 1805-200P or Honeywell G80**) are preferred.

- You need **smart thermostat compatibility** without additional wiring modifications, in which case a **modern digital valve** (e.g., Honeywell G80 or White-Rodgers) might be better.

For most **standard residential heating applications**, the **Fisher 1805-52P remains a solid and cost-effective choice** when installed and maintained correctly. Always ensure proper sizing, wiring, and calibration to maximize its performance and safety.

Details:

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part #: 180552p price

• $149.99

specifications valvesplumbing:

• brand: Fisher
• mpn: 1805-52p
• part type: Valve
• suitable media: Fuel
• unit type: Unit
• valve operation: Solenoid
• country of origin: Mexico

returns valvesplumbing:

• policy: No Returns

shipping valvesplumbing:

• class: Standard
• type: Calculated
• transit: 3-9 Days
• cost: $42.86
• carrier: UPS
• service: UPS Ground

seller valvesplumbing:

• rating: 99.7%
• # reviews: 7751
• city: Douglassville, Pennsylvania

offer valvesplumbing:

• availability: In Stock
• options: Ship-to-home
• sold: 0
• best offers: True
• quantity: 1
• started: April 28, 2026

general valvesplumbing:

• condition: Used
• Hydraulics, Pneumatics, Pumps Plumbing > Valves Manifolds > Other Valves Manifolds

payments valvesplumbing:

• credit card: Mastercard
• wallet: Apple-pay
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