Rate of Flow Control Valve

Rate of Flow Control Valve

Rate of Flow Control Valve

Basic Information of Rate of Flow Control Valve

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.
Rate of Flow Control Valve

Features of Rate of Flow Control Valve

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.
Rate of Flow Control Valve

Principle of Rate of Flow Control Valve

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.
Rate of Flow Control Valve

Installation and Commissioning of Rate of Flow Control Valve

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 ZECO 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.

ZECO manufactures valves in more than 50 different alloys.

Product scope, Standards & Materials of Rate of Flow Control Valve

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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