Hydraulic butterfly check valve

Application

 

In thermal power plant, hydraulic control butterfly check valve is installed at pump outlet and plays two functions:

 

• Reliable shutoff by interlock system with water pump.
• Prevent back flow.

 

Types

 

Classified by driving force, hydraulic butterfly check valve could be counter weight type or accumulator type.

 

Specification

 

Standard: JB/T 5299
Size: DN500~DN4000
Pressure: PN2.5, PN10, PN16, PN25
Temperature: -15℃~110℃
Shell test pressure: 1.5PN
Leak test pressure: 1.1PN
Installation: horizontal
Connection: flange
Valve body material: HT200/QT450-10/WCB/CF8
Applicable medium: raw water, seawater, river water, etc.
Open course: 30~120s to full open
Close course:
Quick closing stage 3~30s, adjustable. Angle 65±10°
Slow closing stage 5~90s, adjustable. Angle 25±10°

 

Features

 

• Controlled closing with different speed in two stages. Slow closing to avoid damage caused by water hammer effect.
• Reliable hydraulic system. Long pressure maintaining time. oil pump startup interval up to 500 hours.
• Visual position indicator. Adjustable position limit.
• High automatic level. PLC & DCS control. Touch screen for interaction.
• Eccentric design.