Fisher™ Type 289P Pilot Operated Relief Valve

ตัวแทนจำหน่าย Fisher Type 289P Pilot Operated Relief Valve or Back pressure Regulator ในประเทศไทย

The Fisher Type 289P is a pilot-operated relief valve designed to provide overpressure protection for downstream systems. It is suitable for use with natural gas, air, propane, and other non-corrosive gases. The valve's smooth opening action minimizes pressure surges during emergency conditions, while its external control line enables rapid and accurate pressure registration. With minimal pressure buildup required, the valve opens fully to deliver maximum relief capacity.

Features

Cost-Effective Design
• A simple and economical design that offers the performance and capacity of higher-priced relief valves.

High Relief Capacity with Minimal Pressure Buildup
• The pilot-operated mechanism allows the valve to respond to small increases in inlet pressure, delivering high flow rates and excellent value.

Precise Operation
• Minimal buildup over the set pressure is required to fully open the main valve, thanks to the light-rate spring and pilot control.

Quick Reseating
• A fixed restriction in the pilot ensures the valve plug reseats rapidly after relieving pressure, maintaining system stability.

User-Friendly Maintenance
• Maintenance can be performed without removing the valve from the line, and no special tools are needed—streamlining servicing.

Durable Construction
• Built for long service life with rugged materials that require minimal upkeep.

Protective Powder Coating
• All Fisher® products are finished with a powder-coated paint, providing strong resistance to impact, abrasion, and corrosion.

Corrosion-Resistant Components
• Critical hardware, including the adjusting screw and bolts, are double zinc-chromated for superior corrosion protection.

Reliable Capacity Utilization
• Fisher relief valves are rigorously laboratory tested—allowing operators to confidently use 100% of the published relief capacities.

Part Number
• 1B986027212
• 1B788327022
• 1K748527202
• 14A9672X012
• 14A9673X012
• 1F826927052

Specifications

Body Sizes and End Connection Styles
• 1 or 2 NPT

Maximum Relief (Inlet) Pressure
• 1 NPT: 50 psig / 3.4 bar over relief set pressure or 110 psig / 7.6 bar whichever is lower
• 2 NPT: 15 psig / 1.0 bar

Relief Set Pressure Range
• 1 NPT: 10 to 100 psig / 0.69 to 7.0 bar in three ranges
• 2 NPT: 14-inches w.c. to 10 psig / 35 mbar to 0.69 bar in two ranges

Pressure Registration
• External

Temperature Capabilities
• With Nitrile (NBR): -20 to 180°F / -29 to 82°C
• With Fluorocarbon (FKM): 0 to 300°F / -18 to 149°C

Approximate Weights
• 1 NPT: 5 pounds / 2.3 kg
• 2 NPT: 15 pounds / 6.8 kg

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Data Sheets: 289P Pilot-Operated Relief Valve Bulletin, Fisher-EN.pdf