Slab Gate Valve Manufacturer in Africa

Product Introduction

Transmission pipelines over long distances require valves that provide full bore flow, positive shut-off and uninterrupted pigging operations without reducing the diameter of the pipeline. A Slab Gate Valve is specifically manufactured to meet these requirements, with a single solid gate that moves vertically to open or close the flow passage. A through-conduit design offers a smooth internal bore for passage of pipeline cleaning and inspection tools unimpeded. African Valve is a Leading Slab Gate Valve Manufacturer in Africa We manufacture and supply valves of varying material grades, pressure classes, end connections and actuation options for pipeline projects in Nigeria, Egypt, South Africa, Kenya, Ghana and other African countries and international export destinations.

Why Is a Slab Gate Valve Used?

Slab gate valves are commonly used in oil and gas transmission pipelines where continuous flow and positive isolation are required. Unlike traditional wedge gate valves, the slab gate moves between floating seats to create a tight mechanical seal while maintaining a straight through flow path. The design allows pipeline pigs to pass through the valve freely and minimises pressure loss. It is suited for crude oil, natural gas, refined petroleum products, water injection systems and multiphase process media. Slab Gate Valves are commonly installed in pipeline terminals, cross-country transmission networks, compressor stations and gathering stations due to their full bore design.

Design & Working Principle

The valve moves a solid slab gate up or down through a threaded stem using a handwheel or an actuator. When the gate is opened, it is moved completely out of the flow passage thus giving a continuous bore equal to the internal diameter of the pipeline. During closing, the slab gate is in line with the floating seats which are energised by line pressure to effect positive sealing on the upstream and downstream sides. Slab Gate Valves can be supplied with expanding gate arrangements, metal to metal sealing, double block and bleed capability, manual or automated operation with pneumatic, electric or hydraulic actuators as per project requirements.

Materials & Construction

The valve is manufactured using:

• Carbon Steel – ASTM A216 WCB

• Carbon Steel – ASTM A105

• Stainless Steel – ASTM A351 CF8 / CF8M

• Duplex Stainless Steel

• Super Duplex Stainless Steel

• Alloy Steel

Construction features include:

• Through Conduit Full Bore Design

• Solid Slab Gate

• Floating Seats

• Blow-out Proof Stem

• Fire-safe Construction

• Anti-static Device

• Double Block and Bleed Design (Optional)

• Flanged and Butt Weld End Connections

Technical Specifications

• Size Range: DN50 to DN1200 (2" to 48")

• Pressure Ratings: Class 150 to Class 2500

• Design Standards: API 6D, ASME B16.34

• Testing Standard: API 598, API 6D

• Face-to-Face: ASME B16.10

• End Connections: Flanged, Butt Weld

• Operation: Handwheel, Gear, Pneumatic, Electric, Hydraulic

Industrial Applications

Slab Gate Valves are widely used in:

• Oil & Gas Transmission Pipelines

• Petrochemical Plants

• Crude Oil Gathering Systems

• Natural Gas Distribution

• Pipeline Terminals

• Offshore Platforms

• Water Injection Systems

• Mining Operations

• Industrial Process Pipelines

Product Features

• Through-conduit full bore design permits pigging operations

• Floating seats provide positive bi-directional sealing

• Minimal pressure loss across the valve

• Available with Double Block and Bleed configuration

• Suitable for high-pressure pipeline applications

• Compatible with manual and automated operation

Manufacturing & Inspection

African Valve manufactures Slab Gate Valves according to international engineering standards and project specifications. Every valve undergoes dimensional inspection, hydrostatic shell testing, seat leakage testing, operational testing, and final quality verification before dispatch. Material Test Certificates (MTC), Pressure Test Reports, PMI reports, NDT reports, fire-safe certification, and third-party inspection documentation are available to meet customer and project requirements.

Supply Across Africa

African Valve supplies Slab Gate Valves to pipeline, oil & gas, petrochemical, offshore, mining, and industrial infrastructure projects throughout Nigeria, Egypt, South Africa, Kenya, Ghana, and other African countries. Valves are available in different material grades, pressure classes, end connections, sealing arrangements, and actuation systems to suit pipeline isolation and transmission applications.