Rate of Flow Control Valve

Rate of Flow Control Valve

Basic Information
Basic Information
This valve maintains a predetermined flow, limits excessive flow to a predetermined value, and reduces upstream pressure to downstream pressure. Even if the upstream pressure of the main valve changes, it will not affect the downstream flow.
Features
Features
1. Convenient installation and use;
2. The control part has no complex electric sensing mechanism and is not prone to failure;
3. The setting is simple, and the adjustment function will be completed automatically after setting;
4. No manual operation or other power source is required.
Principle
Principle
The flow value in the pipeline is controlled by the change of the opening size of the main valve disc and can be stabilized at a set value. The size of the main disc switch and the opening is controlled by the size of the pilot valve. The media pressure is taken from the downstream side of the throttle plate plus the spring force and the pressure taken from the upstream side of the throttle plate acted on the lower part of the diaphragm respectively. When the flow rate and pressure on both sides of the throttle orifice plate change, the pressure acting on the lower part of the diaphragm will no longer balance, the diaphragm deformation, the opening of the guide valve change, and the opening of the main valve will also change accordingly, so that the flow in the main road will return to the original set value.
Installation and Commissioning
Installation and Commissioning
A gate valve and a filter should be installed before the main valve, and a gate valve should be installed after the main valve for maintenance. The guide valve has been adjusted before delivery. If the set flow value is not suitable for the field requirements, the guide valve adjusting screw can be adjusted. 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

Leave us Message

Related Product Cases
Nanjing LG Chemistry

Nanjing LG Chemistry

LG Chemical (Nanjing) Information Electronic Materials Co., LTD. is a large production enterprise invested and built by ...
Wenzhou Olympic Sports Center

Wenzhou Olympic Sports Center

Wenzhou Olympic Sports Center main stadium project and Wenzhou sports school Yongzhong campus project are located in the...
Fuzhou Water Company

Fuzhou Water Company

Fuzhou Water Company has six water plants in operation, with a total capacity of 1.32 million cubic meters of water per ...
Related News
  • TEL:+86-21-59599006
  • FAX:+86-21-59599006 ext.806
  • EMAIL: marketing@zecovalve.com
  • ADDRESS:Caoan Road 3999#, Shanghai, China
ZhengFeng Valve Product Information Catalog Download