FISHER™ N120
Key Parameters
Category Parameter Name Description & Typical Values
Valve Specifications Valve Size 1/2" to 4" (DN 15 to DN 100)
End Connections Flanged - ANSI Class 150, 300. RF (Raised Face) standard.
Body Styles Globe Body - Standard.
Body Materials Carbon Steel (WCB) - Standard. Stainless Steel (CF8/304, CF8M/316) available.
Pressure & Temperature Pressure Rating ANSI Class 150, 300.
Temperature Range Standard: -20°F to 450°F (-29°C to 232°C).
Internal Parts (Trim) Trim Types Quick-Open (Standard), Linear, Equal Percentage.
Trim Design Top-Guided, Unbalanced, Single-Port Plug.
Leakage Class Class II (standard metal-to-metal seat). Class IV (with optional soft seat).
Trim Materials Stainless Steel (Standard).
Seat Ring Screwed-in design.
Flow Capacity Flow Coefficient (Cv) Varies by valve size and trim. Consult specific Cv tables. Example: A 2" N120 has a typical Cv in the range of ~25 to 60.
Actuator (Typical) Type Fisher 657 (spring-and-diaphragm, direct-acting) or 667 (spring-and-diaphragm, reverse-acting).
Action Air-to-Open (Fail Close) or Air-to-Close (Fail Open).
Standard Signal 3-15 psig (0.2-1.0 bar) control signal.
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