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3-Way Pneumatic Diaphragm Control Valve
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3-Way Pneumatic Diaphragm Control Valve

High Performance • Durable • Leak Proof

API 6DASME B16.34ISO 17292CE Certified

3-Way Pneumatic Diaphragm Control Valve provides accurate mixing with fast response and low maintenance.

Technical Specifications

Key Features & Applications

3 Way Pneumatic Diaphragm Control Valve Manufacturer in Africa

Product Introduction

Applications requiring automatic mixing, diverting, and precise flow regulation benefit from valves that combine a three-port body with responsive pneumatic actuation. A 3 Way Pneumatic Diaphragm Control Valve is designed to regulate the flow of liquids, gases, steam, and other process media by automatically directing or combining process streams according to control system requirements. The pneumatic diaphragm actuator provides smooth, accurate positioning with fast response, making the valve suitable for continuous modulating service. African Valve is a Well-known 3 Way Pneumatic Diaphragm Control Valve Manufacturer in Africa, manufacturing and supplying these valves in various material grades, pressure classes, trim configurations, and diaphragm actuator sizes for projects across Nigeria, Egypt, South Africa, Kenya, Ghana, and other African countries, along with international export destinations.

Why Is a 3 Way Pneumatic Diaphragm Control Valve Used?

A 3 Way Pneumatic Diaphragm Control Valve is utilized at locations where there is a requirement to blend two process flows or divert a single process flow. The diaphragm valve uses compressed air for actuation and is fast and accurate in operation as it does not require electric motors for operation. It allows control of process temperature, pressure, flow rate, and liquid level in an efficient manner with simplified piping configuration using a single valve instead of several manual valves.

Design & Working Principle

The valve consists of a three-port globe body, precision valve plug, seat assembly, stem, pneumatic diaphragm actuator, and positioner. A control signal from the automation system is converted into pneumatic pressure, causing the diaphragm actuator to move the valve stem vertically. The valve plug accurately regulates the flow between the three ports, either combining two inlet streams into one outlet or diverting one inlet stream between two outlets. Depending on operating conditions, the valve can be supplied with balanced trim, cage-guided construction, smart positioners, air filter regulators, and fail-open or fail-close actuator configurations.


Materials & Construction

The valve is manufactured using:

  • Carbon Steel – ASTM A216 WCB / ASTM A105

  • Stainless Steel – ASTM A351 CF8 / CF8M

  • Stainless Steel Forgings – ASTM A182 F304 / F316

  • Alloy Steel – ASTM A217 WC6 / WC9

  • Duplex Stainless Steel – ASTM A995 Grade 4A

  • Super Duplex Stainless Steel – ASTM A995 Grade 5A / Grade 6A

Construction features include:

  • Three Port Globe Body Design

  • Pneumatic Diaphragm Actuator

  • Mixing or Diverting Configuration

  • Balanced Valve Plug

  • Blow-out Proof Stem

  • Smart Positioner (Optional)

  • Flanged and Butt Weld End Connections

Technical Specifications

  • Size Range: DN15 to DN300 (½" to 12")

  • Pressure Ratings: Class 150, 300, 600, 900

  • Design Standards: ASME B16.34, IEC 60534

  • Testing Standard: API 598, IEC 60534-4

  • End Connections: Flanged, Butt Weld

  • Operation: Pneumatic Diaphragm Actuator

Industrial Applications

3 Way Pneumatic Diaphragm Control Valves are widely used in:

  • Oil & Gas

  • Petrochemical Plants

  • Chemical Processing

  • Power Generation

  • Water & Wastewater Treatment

  • Marine & Offshore

  • Desalination Plants

  • Mining

  • Heat Exchanger and Utility Systems

Product Features

  • Pneumatic diaphragm actuator provides smooth automatic control

  • Performs both mixing and diverting operations

  • Fast response with accurate process regulation

  • Available with intelligent positioners and automation accessories

  • Suitable for continuous modulating applications

  • Manufactured according to internationally recognized engineering standards

Manufacturing & Inspection

African Valve manufactures 3 Way Pneumatic Diaphragm Control Valves according to international engineering standards and customer project specifications. Every valve undergoes dimensional inspection, hydrostatic shell testing, seat leakage testing, actuator calibration, functional stroke testing, and final operational verification before dispatch. Material Test Certificates (MTC), Pressure Test Reports, PMI reports, NDT reports, calibration records, and third-party inspection documentation are available to support project quality and compliance requirements.

Supply Across Africa

African Valve supplies 3 Way Pneumatic Diaphragm Control Valves to power stations, petrochemical plants, chemical processing facilities, desalination projects, marine installations, mining operations, water treatment systems, and industrial infrastructure throughout Nigeria, Egypt, South Africa, Kenya, Ghana, and other African countries. Valves are available in multiple material grades, pressure classes, trim configurations, end connections, and pneumatic diaphragm actuator options to meet demanding automatic process control applications.


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