Features

• High Flow Rates

• Small Size

• Reliability Due to Simplicity

• Tight Shutoff

• Throttling Type Relief

Body Sizes and End Connection Styles

Inlet Connections:

Type 289L: 3/4 or 1-inch threaded NPTTypes 289A and 289U: 1/4-inch threaded NPTType 289H: 1 or 2-inch threaded NPTType 289HH: 1-inch threaded NPT

Outlet (Vent) Connections:

Same sizes as inlet connection

Maximum Allowable Relief (Inlet) Pressure

100 psig (6,9 bar)

Relief Set Pressure Range

5-inches w.c. to 75 psig (12 mbar to 5,2 bar) in several ranges

Pressure Registration

Internal

Temperature Capabilities

Nitrile (NBR) and Neoprene Elastomers: -20 to 150°F (-29 to 66°C)Fluoroelastomers (FKM): 20 to 300°F (-7 to 149°C) / Available with Types 289H and 289HH only

Shipping Weights

Type 289A and 289U: 0.75 pounds (0,3 kg)

Type 289H: 1-inch (DN 25) - 4 lb (1,8 kg) 2-inch (DN 50) - 15 lb (6,8 kg)

Type 289HH: 4 lb (1,8 kg)

Type 289L: 15 lb (0,68 kg)