The Fisher Y610A, Y611A, and Y612A Series devices are designed for a broad range of vacuum and relief service applications.
• Y610A Series are primarily used as vacuum breakers
• Y611A Series can function as either vacuum breakers or relief valves
• Y612A Series are engineered for use as vacuum regulators
These devices offer flexible and reliable pressure control solutions for systems handling gases under vacuum or requiring controlled relief.
Features
Precision Low-Pressure Control
Large diaphragm surface areas ensure greater accuracy and stability in low-pressure settings.
Corrosion Resistance
• Available in a variety of material options, these devices are compatible with aggressive or corrosive process gases.
Flexible Installation Options
• The diaphragm case and body can be rotated 360 degrees, and the four-position vent design allows for flexible installation—even in confined or awkward spaces—without compromising performance.
Tamper-Resistant Adjustment
• Most models feature a spring case with a sealing wire capability, allowing users to detect or prevent unauthorized pressure setting adjustments.
Durable Construction
• Built for tough environments, the diaphragm case and internal components are designed to resist vibration and mechanical shock.
Specifications
Body Sizes (Inlet x Outlet) and End Connection Styles
• Type Y610A, Y610AP, Y611A, Y611AP, Y612A or Y612AP: NPS 1-1/2 x 1-1/2, 2 x 2, NPT or NPS 2 x 2 / DN 50 x 50 CL125A FF or CL250A RF Flanged
Maximum Inlet Pressure
• 0.25 to 3 psig / 17 to 207 mbar
Maximum Outlet Pressure (Casing)
• 0.25 to 3 psig / 17 to 207 mbar
Temperature Capabilities
• -20° to 150°F / -29° to 66°C
Pressure Registration
• Type Y610A, Y611A, or Y612A: Internal
• Types Y610AP, Y611AP, and Y612AP: External
Approximate Weights
• NPS 1-1/2 x 1-1/2: 25 pounds / 11 kg
• NPS 2 x 2 / DN 50 x 50: 30 pounds / 14 kg
Additional Technical Data
• For additional technical information, contact your local Sales Office or refer to technical documentation.
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