ตัวแทนจำหน่าย Fisher by Emerson Types 1808 and 1808A Relief Valve or Backpressure Regulators ในประเทศไทย
The Fisher Type 1808 (globe-style) and Type 1808A (angle-style) are compact, pilot-operated relief valves and backpressure regulators designed for economical, reliable pressure control in gas and liquid service. Ideal for use on oil and gas separators and in gas distribution system relief applications, these units help maintain system pressure across a wide range of operating conditions.
They control outlet pressures from 3 to 125 psig (0.21 to 8.6 bar), with adjustable setpoints configured using the pilot's adjusting screw to meet specific system requirements.
Features
Long-Lasting Performance
• The diaphragm—used as the measuring element—is isolated from the main flow path, protecting it from wear caused by debris or particulates and extending operational life.
Easy In-Line Maintenance
• The actuator assembly can be removed by loosening just two nuts, allowing quick access to internal trim components without disturbing the pipeline.
Simplified Installation
• With internal pressure registration, these regulators eliminate the need for external control lines, reducing installation complexity and allowing for flexible mounting orientations.
Streamlined, Reliable Design
• A minimal-part construction results in high reliability, reduced maintenance, and lower spare parts inventory requirements.
Compact and Lightweight
• Measuring less than 12 inches (305 mm) in height and weighing 25 pounds (11 kg) or less, the units are ideal for tight or space-constrained installations.
Dual-Phase Service Versatility
• Designed for both liquid and gas applications, each unit includes a pilot exhaust port and tapped spring case—fitted with a removable vent—for remote venting or pneumatic pressure loading when needed.
Optional Upstream Pressure Registration
• When used with the Type 6358B pilot, an upstream control line can be added for full-capacity relief flow with minimal pressure buildup, even at varying setpoints—ideal for gas service applications.
Self-Draining Design
• The Type 1808A angle-body configuration increases flow capacity and allows complete drainage of process fluids during shutdown or prior to valve maintenance.
Specifications
Body Size and End Connection Style
• 2 NPT
Maximum Relief (Inlet) Pressure
• 150 psig / 10,3 bar, including buildup
Relief Set Pressure Range
• 3 to 125 psig / 0,21 to 8,6 bar in three ranges
Temperature Capabilities
• -20° to 180°F / -29° to 82°C
Approximate Weights
• Type 1808: 22 Pounds / 10 kg
• Type 1808A: 25 Pounds / 11 kg
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