Fisher™ 289L-289H系列安全阀是一款弹簧负载式节流泄压阀，可用作下游压力调压器，防止系统出现过压。 平稳的节流操作在泄压操作期间可大限度地降低系统中的压力冲击。289 系列泄压阀是低压设置的理想选择，因为大阀膜面积可获得更高的灵敏度。289 系列泄压阀设计用于压力控制；它们不适合用作 ASME 安全泄压阀。广州奥丽斯特燃气设备有限公司是美国FISHER产品华南区域（广东省）艾默生集团*代理商。Fisher™ 289L-289H系列安全阀
尺寸小
简单可靠
设计紧凑
规格
阀体尺寸和端口连接方式
289A 和 289U 型：1/4 NPT
289H 型：1，2 NPT
289HH 型：1 NPT
289L 型：3/4，1 NPT
289U 型：1/4 NPT
允许的大泄压（入口）压力
100 psig / 6.9 bar
泄压设定压力范围（5 个型号）
5"wc 至 50 psig / 25mbar 至 3.5 bar
取压方式
内取压
温度适用范围
橡胶 (NBR) 和氯丁橡胶 (CR)：-20 至 150°F / -29 至 66°C 氟橡胶 (FKM)：20 至 300°F / -7 至 149°C 仅 289H 和 289HH 型
大致重量
289A 和 289U 型：0.75 lb/0.3 kg
289H 型：1 NPT - 4 lb/2 kg, 2 NPT - 15 lb/7 kg
289HH 型：4 lb/2 kg
289L 型：15 lb/7 kg
289H：泄压压力调节范围
0.5 至 2.25 psig / 34 至 155 mbar
289H：大泄压（入口）压力
25 psig / 1.7 bar
Fisher 289 Series relief valves are spring-loaded throttling relief valves used as downstream pressure regulators to protect the system from overpressure. A smooth throttling action minimizes pressure surges in the system during relief operation. 289 Series relief valves are ideal for low-pressure settings due to the increased sensitivity provided by a large diaphragm area. 289 Series relief valves are designed for pressure control; they are not ASME safety relief valves.
Features
Throttling Type Relief
High Flow Rates
Small Size
Reliability Due to Simplicity
Compact Design
Specifications
Body Sizes and End Connection Styles
Types 289A and 289U: 1/4 NPT
Type 289H: 1, 2 NPT
Type 289HH: 1 NPT
Type 289L: 3/4, 1 NPT
Type 289U: 1/4 NPT
Maximum Allowable Relief (Inlet) Pressure
100 psig / 6.9 bar
Relief Set Pressure Ranges (5 models)
5wc to 50 psig / 25mbar to 3.5 bar
Pressure Registration
Internal
Temperature Capabilities
Nitrile (NBR) and Neoprene (CR) Elastomers: -20 to 150°F / -29 to 66°C Fluorocarbon (FKM): 20 to 300°F / -7 to 149°C Available with Types 289H and 289HH only
Approximate Weights
Type 289A and 289U: 0.75 Pounds / 0.3 kg
Type 289H: 1 NPT - 4 Pounds / 2 kg, 2 NPT - 15 Pounds / 7 kg
Type 289HH: 4 Pounds / 2 kg
Type 289L: 15 Pounds / 7 kg
289H: Relief Adjustment Ranges
0.5 to 2.25 psig / 34 to 155 mbar
289H: Maximum Relief (Inlet) Pressure
25 psig / 1.7 bar
Fisher China Guangzhou Honest Gas Equipment Co., LTD.
