ตัวแทนจำหน่าย Fisher by Emerson H200 Series Relief Valves ในประเทศไทย
The Fisher H200 Series Pop relief valves are self-operated safety devices designed to provide overpressure protection in gas systems. These valves feature preset and pinned spring retainers to maintain a fixed relief pressure and are constructed with a spring-opposed poppet assembly incorporating a Nitrile (NBR) disk.
When inlet pressure exceeds the preset spring setting, the poppet assembly lifts from the orifice to allow gas to safely vent. The H200 Series offers relief pressure settings from 25 to 300 psig (1.7 to 20.7 bar) using a wide selection of interchangeable springs.
Due to their simple operation, compact size, and broad relief range, these valves are ideal in applications where:
• Venting to atmosphere is permitted
• The process gas is compatible with Nitrile
• Some pressure tolerance is acceptable
• The relief capacity meets system needs
Common applications include pneumatic control lines for air tools such as drills and jackhammers, as well as farm tap installations.
The H200 Series includes:
• Type H202 and Type H203, differing only in inlet connection size.
Features
Compact Design
• Small form factor allows installation in space-restricted environments without sacrificing performance.
Cost-Effective Overpressure Protection
• Offers low initial cost, straightforward installation, and high relief capacity per dollar, making it an economical solution for pressure relief.
Durable Construction
• Built with a brass body and stainless steel spring, the valve is resistant to corrosion and environmental damage. The preset, pinned spring retainer prevents tampering with the relief setting, ensuring operational integrity.
Installation Guidelines
• The valve may be installed in any orientation, but it must be positioned to safely vent gas away from personnel and ignition sources, avoiding any fire, toxic, or explosion hazards.
• Ensure the outlet remains clear of debris or conditions that may restrict venting.
• It is recommended to use a Type P145 raincap with any H200 Series valve to protect the outlet from environmental contaminants.
• Refer to Figure 3 for installation layout and Figure 4 for dimensional details.
• All installations should be reviewed for compliance with applicable safety codes and standards.
Specifications
Wide-Open Sizing Coefficient
• Cg: 405
Maximum Allowable Relief (Inlet) Pressure
• 400 psig / 27,6 bar
Fixed Relief Pressures
• 25 to 300 psig / 1,7 to 20,7 bar with 12 settings
Available Configurations and End Connection Styles
• Type H202: NPS 3/4, NPT
• Type H203: NPS 1, NPT
Temperature Capabilities
• -20° to 160°F / -29° to 71°C
Approximate Weight
• 0.5 pound / 0,2 kg
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