700X pump control valve automatic water pump protection valve Oucang

700X Pump Control Valve | Automatic Pump Protection & Pressure Relief

The 700X type water pump control valve consists of a main valve, an electromagnetic pilot valve, a needle valve, a ball valve, a check valve, a travel switch, a micro-filter, and a pressure gauge, forming a hydraulic control connection system. When the water pump needs to stop working, the main valve closes 90% under the action of the incoming water pressure, and the water pump then stops running. The remaining 10% is closed by the return water pressure, which effectively prevents the occurrence of water hammer. When the water pump stops working, the electromagnetic pilot valve first closes, the main valve control chamber stops draining, the pressure in the control chamber rises, and the main valve starts to close. This control valve is energy-saving and electricity-saving, easy to maintain, and the water pump stops stably. It is widely used in water supply pipeline systems such as high-rise buildings and residential areas, as well as urban water supply projects.

Description
Additional information

Description

Automatic Pump Control Valve

Technical Parameters

Size Range: DN50 – DN600 (2″ – 24″)
Pressure Rating: PN10 / PN16 / PN25
Body Material: Cast Iron / Ductile Iron / Cast Steel / Stainless Steel
Seal Material: NBR / EPDM / Viton
Working Temperature: 0°C – 80°C
Connection Type: Flange end according to ANSI / BS / DIN / JIS standard

How It Works

When the pump starts, the 700x pump control valve opens slowly to prevent sudden pressure drop. When the pump stops, the valve closes 70% rapidly to avoid backflow, then closes the remaining 30% slowly to eliminate water hammer. This two-stage closing action protects your pump and pipeline from pressure surges.

Learn more about water hammer from this Wikipedia article.

Application Examples

High-rise building water supply systems
Municipal water plant pump stations
Industrial cooling water circulation
Irrigation pump sets
Booster pump stations

Installation & Maintenance Tips

Install the valve horizontally with the arrow pointing in the flow direction. Before startup, open the bleed valve to remove air from the valve cover. Inspect the diaphragm and spring every 6 months. For frozen areas, insulate the valve body.