Pump Flow Control Valve

Pump Flow Control Valve

Basic Information
Basic Information
This valve is installed at the outlet of the water pump, which can limit the water flow of the water pump and stabilize the head of the water pump. It can make the water pump work in the high-efficiency area, and prevent the overload of the low-head high-flow water pump from burning the motor
Features
Features
1. Support pump working point in high-efficiency area;
2. Limited water pump flow, low efficiency when running;
3. When the pump is slowly closed and stopped, there is no water hammer;
4. Prevent overloading of the water pump and oversetting current from burning the motor.
Principle
Principle
When all the parallel pumps are working, the pump head is greater than the control pressure difference of the guide valve, the guide valve is closed, and the main valve can reach the maximum opening degree. When it is necessary to change the flow rate and reduce the number of running stations, the flow rate of the pump still in operation increases, and the head is smaller than the control pressure difference of the guide valve, when the guide valve opens, the pressure of the main valve control room increases, the main valve closes, the flow rate of the pump decreases, and the head increases accordingly. When reaching the balance state, the pump head is the control pressure difference of the pilot valve. Due to the operation of other pumps, the main valve is closed after the check valve is closed to prevent the backflow of water.
Installation and Commissioning
Installation and Commissioning
This valve is generally sized according to pipe diameter and system designers should propose to control the head or flow; The 1/2 "pipe joint on the pilot valve shall be installed at the inlet of the water pump. For specific use, please consult ZhengFeng Valve Group.

Part

Material

Standard

Body

Ductile Iron

EN 1563/DIN 1693

Bonnet

Ductile Iron

EN 1563/DIN 1693

Trim

Stainless Steel 431

EN10088-1/ASTM A959

Seat

Stainless Steel 431

EN10088-1/ASTM A959

Diaphragm

EPDM / NBR

ISO 4633

Pilot Valve

Stainless Steel 431

EN10088-1/ASTM A959

For the materials options not listed, consult factory.

ZhengFeng manufactures valves in more than 50 different alloys.

Product scope, Standards & Materials
Size Range: 2"~24"
Pressure Rating: 10bar ~ 25bar
Face to Face Dimensions: AMSE B16.10, EN558-1
Flange End Dimension: AMSE B16.1/16.42, AS4087, EN1092-2
Coating: Fusion Bonded Epoxy Coating
Inspection and Test: ISO 5208 / EN 12226-2

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