Industrial Controller
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Infinite Innovation, the Future of Industrial Control Systems
Infinite Innovation, the Future of Industrial Control Systems
PRODUCT POSITION:HOMEPRODUCT—FISHER 289H-41
FISHER 289H-41
Parameters / Specifications Model: Fisher 289H‑41 Series: Fisher 289 Series Relief / Back‑Pressure Regulators Body Size / End Connections: 1″ NPT (inlet & outlet) for the “H” size version Relief (Set) Spring Range: Approx 1.0 to 4.5 psig (≈0.07 to 0.31 bar) for the “‑41” variant Maximum Allowable Inlet Pressure (Body Rating): Approx 100 psig (≈6.9 bar) for this body size Temperature Capability (depending on elastomer): Nitrile (NBR) / Neoprene (CR): –20 °F to +150 °F (≈ –29 °C to +66 °C) Fluoroelastomer (FKM): 20 °F to +300 °F (≈ –7 °C to +149 °C) (available on “H/HH” types) Approximate Weight: ~4 lb (≈2.0 kg) for the 1″‑NPT size “H” body Media / Application: Non‑corrosive gas or air service, used as a relief device or back‑pressure regulator in downstream systems to limit pressure, reduce pressure surges, protect equipment Features: Spring‑loaded throttling action with minimal pressure surge during relief Compact design for installation where space may be limited Reliable, relatively simple construction for high dependability
DESCRIBE
The Fisher 289H‑41 is part of the Fisher 289 Series of spring‑loaded throttling relief/back‑pressure regulators. It is designed to be installed downstream of a primary regulator or upstream system to protect against over‑pressure by venting or relieving fluid when the downstream pressure exceeds a set point. The “H” variant denotes a body size with 1″ (or 2″) NPT inlet/outlet connections for higher flow, and the “‑41” suffix identifies a specific spring‑range model (low‑set relief model). The device is suited for non‑corrosive gas or air services where smooth throttling of excess pressure is required.
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