Product Overview

This valve is generally installed at the outlet of a water pump. It features hydraulic automatic control, slow opening when the pump starts, and first quick closing then slow closing when the pump stops. It also combines the functions of three products at the pump outlet: a water hammer arrester, a globe valve, and a check valve, making it a new type of two-stage closing valve.

Main Features

• Hydraulic automatic control.
• Slow opening during pump startup, first quick then slow closing during pump shutdown.
• Integrates functions of water hammer arrester, globe valve and check valve.

Working Principle

When the pump starts, water pressure pushes the valve core to open slowly, preventing water flow impact. During pump shutdown, water pressure drops: the valve first closes quickly to stop reverse flow initially, then closes slowly to eliminate water hammer. It relies on hydraulic pressure changes to achieve automatic, two-stage opening and closing, while integrating the functions of backflow prevention and water hammer elimination.

Structural Features

• Adopts a two-stage closing mechanism to realize slow opening and “quick-then-slow” closing.
• Equipped with a hydraulic control system for automatic operation without external power.
• Integrates internal components corresponding to check valve, globe valve and water hammer arrester functions, simplifying the overall pipeline structure.
• Compact design, suitable for installation at pump outlets with limited space.

Maintenance

• Check hydraulic oil level annually
• Test closing time every 6 months
• Inspect disc and seat for wear during system shutdowns
• Lubricate adjustment mechanism yearly
• Verify proper operation after system pressure changes