Basic information

Adjustable  valve can manually adjust the set flow rate in the pipeline, and also can automatically maintain the pressure difference before and after the valve unchanged, so as to achieve the controlled pipe road flow constant.

Features

1. Flow regulation and hydraulic balance are integrated;
2. The self - acting diaphragm differential pressure controller responds quickly to the change of flow rate;
3. reduce the use of air conditioning system valves;
4. Improve the efficiency of the water pump operation and save energy.

Principle

This valve keeps P constant through the spring force. The pressure channel inside the valve body will adjust the pressure P1 and P2 at both ends of the structure, causing the upper and lower ends of the diaphragm respectively. The balance state P1=P2+Pspring will be maintained through the action of spring force, If P1 increases, the force acting on the lower part of the diaphragm increases correspondingly, and the diaphragm moves upward, reducing the pressure difference control structure space, and P2 increases accordingly to reach a new balance. And vice versa; And this valve adjusts the flow rate by adjusting the disc to change the Kv value.

Installation and Commissioning

Specifications are determined according to the design flow rate of the air conditioning box and allowable pressure range of the valve, and technical parameters are determined according to the requirements. For specific use, please consult ZhengFeng Valve Group.

Product scope, Standards & Materials

Size Range: 2"~12"
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

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
Electric Actuator	Honeywell	UL94-5V
For the materials options not listed, consult factory. ZhengFeng manufactures valves in more than 50 different alloys.