Product Overview

It is installed at the outlet of the water pump. Before the pump stops running, close the main valve to about 90% first, and when the pump stops running, close the remaining 10%. This can effectively prevent the pump from reversing, and avoid water hammer and water hammer noise.

Main Features

• Designed for water pump outlet to prevent pump reversal.
• Effectively avoids water hammer and water hammer noise.
• Enables stepwise closing (first to ~90%, then remaining 10%) before pump shutdown.
• Ensures stable and safe operation of the water pump system.

Working Principle

1. Before the water pump shuts down, the 700X control valve first closes to approximately 90% of its full closure under preset control logic, which initially restricts the water flow at the pump outlet.

2. When the water pump officially stops running, the valve further closes the remaining 10% to achieve complete shutoff.

3. This two-stage closing process slows down the sudden change in water flow velocity, prevents reverse water flow (which would cause pump reversal), and avoids the pressure surge phenomenon known as water hammer, thereby protecting the pump and the pipeline system.

Structural Features

• Adopts a two-stage closing structure to realize sequential closure (first ~90%, then remaining 10%) and match the pump shutdown process.
• Equipped with a precise control component (e.g., spring, hydraulic mechanism) to ensure stable and accurate valve closing speed and degree.
• Has a durable valve core and sealing structure, which can resist water impact and ensure long-term sealing performance at the pump outlet.
• Features a compact overall design, easy to install and integrate with the water pump outlet pipeline.
• Includes pressure-resistant shell material to adapt to the working pressure of the pump system and avoid deformation or damage.Includes pressure-resistant shell material to adapt to the working pressure of the pump system and avoid deformation or damage.

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