Description

Fisher 66R Series Vapor Recovery Valves
🔹 Product Introduction
The Fisher 66R Series Vapor Recovery Valve is designed for low-pressure vapor recovery and tank pressure balancing in storage and processing systems. It helps capture valuable vapors, prevent product loss, and stabilize tank pressure, especially in large-capacity industrial installations.
With multiple body sizes up to DN100 and robust metal construction, the 66R series is ideal for continuous operation in demanding environments.
🔹 Key Features
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Wide pressure range for precise vapor recovery control
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Large body sizes (DN50–DN100) for high-flow systems
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Internal or external pressure registration options
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Compatible with NBR and FKM diaphragms for temperature resistance
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Cast iron, steel, or stainless steel materials available
🔹 Application Scenarios
The Fisher 66R series is widely used in:
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Oil & gas storage tanks
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Fuel terminals and depots
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Chemical processing plants
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Refinery vapor recovery systems
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Bulk liquid storage facilities
It is especially suitable where stable low-pressure control and vapor conservation are critical for safety and cost reduction.
🔹 Technical Parameters
| Parameter | Specification |
| Product | Fisher 66R Series Vapor Recovery Valves |
| Body Sizes | NPS 2 / DN 50; NPS 3 / DN 80; NPS 4 / DN 100 |
| Body Materials | Cast Iron, Steel, or Stainless Steel |
| End Connections | NPT; CL125 FF; CL150 RF |
| Maximum Inlet Pressure | Type 66R: 8 psig / 550 mbar Type 66RR: 10 psig / 690 mbar |
| Set Pressure Ranges | Type 66R: 2 in.w.c. to 3 psig (5 to 207 mbar) in six ranges Type 66RR: 3 in.w.c. to 3.25 psig (7 to 224 mbar) in seven ranges |
| Pressure Registration | Type 66R: Internal (standard) or External Type 66RR: External |
| Temperature Capabilities | Nitrile (NBR): -20 to 180°F / -29 to 82°C Fluorocarbon (FKM): 40 to 300°F / 4 to 149°C |
| Approximate Weights | 66R: NPS 2 / DN 50 NPT: 50 lb / 23 kg 66R: NPS 3 / DN 80 NPT: 75 lb / 34 kg 66R: NPS 4 / DN 100 NPT: 155 lb / 70 kg 66RR: NPS 2 / DN 50 NPT: 65 lb / 29 kg 66RR: NPS 3 / DN 80 NPT: 115 lb / 52 kg 66RR: NPS 4 / DN 100 NPT: 170 lb / 77 kg |
🔹 For Industrial Buyers
We supply original Fisher 66R valves with verified part numbers and full technical support.
Our team helps you match sizing, pressure range, and materials to your actual operating conditions, reducing installation risks and long-term maintenance costs.
Stable supply, fast quotation, and professional export service are guaranteed.

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