Fisher 289P泄壓閥功能特點：

經濟實惠

低壓升就能達到高放泄能力

操作后可快速重置

維護簡單

經久耐用

緊固件耐腐蝕

全效流通能力

Fisher 289P泄壓閥規格參數：

閥體尺寸和端口連接方式

1 或 2 NPT

**泄壓（入口）壓力

1 NPT：超過放泄設定壓力 50 psig / 3.4 bar 或 110 psig / 7.6 bar，以較低者為準
2 NPT：15 psig / 1.0 bar

泄放設定壓力范圍

1 NPT：10 至 100 psig / 0.69 至 7.0 bar 之間的三個范圍
2 NPT：14 in w.c. 至 10 psig / 35 mbar 至 0.69 bar 之間的兩個范圍

取壓方式

外取壓

溫度適用范圍

丁腈橡膠 (NBR)：-20° 至 180°F / -29° 至 82°C 
氟橡膠 (FKM)：0° 至 300°F / -18° 至 149°C

如需其他技術信息

Fisher Type 289P pilot-operated relief valve is used to provide over pressure protection for downstream systems suitable for service on natural gas, air, propane, or any other operating medium not corrosive to the internal parts. Smooth opening action minimizes system pressure surges during emergency action. Very little buildup over set pressure is required to completely open the main valve for max relief capacity. The external control line provides quick, accurate pressure registration.

Features

Economical

High Relief Capacity with Low Buildup

Accurate

Fast Reseat After Operation

Ease of Maintenance

Rugged Construction

Corrosion Resistant Fasteners

Full Usable Capacity

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℃

With Fluorocarbon (FKM): 0 to 300°F / -18 to 149℃