API Gate Valve

Gate valves are primarily used for positive on/off isolation, rather than continuous throttling. In Nigeria’s oil & gas, refining, gas-transmission and industrial infrastructure, they are selected according to pressure class, nominal size, bore, material and end connection. API Gate Valve Suppliers in Nigeria, African Valve provides gate-valve solutions for pipeline and process systems where dependable isolation and pressure containment are required.

Key Features

• Pipeline Isolation: Designed mainly for full-open or full-closed service.

• Gate Options: Slab, expanding and wedge designs are available for different pipeline and process duties.

• Full or Reduced Bore: Selected according to flow and pipeline requirements.

• Rising / Non-Rising Stem: Chosen according to installation and operating arrangement.

• Metal Seating: Suitable for demanding hydrocarbon and process services.

• Manual or Actuated Operation: Handwheel, gearbox or actuator operation can be provided.

Technical Specifications

Materials & Components

Body / Bonnet

• ASTM A216 WCB / WCC

• ASTM A217 WC1 / WC6 / WC9

• ASTM A351 CF8 / CF8M / CF3 / CF3M

Gate / Wedge

• WCB

• WC1 / WC6 / WC9

• CF8 / CF8M / CF3 / CF3M

Stem

• 2Cr13

• F304 / F304L

• F316 / F316L

Seat / Sealing Face

• 13% Chromium Steel

• Stellite Hardfacing

• Body Material, where specified

• Nylon, where applicable to the selected configuration

Gasket

• Flexible Graphite

• 304 / 316 Stainless Steel + Graphite

Packing

• Flexible Graphite

• PTFE

Applications in Nigeria

Gas Transmission: Sectional isolation on major transmission infrastructure such as the OB3 and AKK gas pipeline systems.

Refining: Isolation of hydrocarbon and utility systems at large refinery facilities, including the Dangote Refinery.

Oil & Gas Processing: Crude-oil, natural-gas gathering, transfer and process lines requiring dependable isolation.

Terminals & Storage: Hydrocarbon transfer and storage-piping systems where positive shut-off is required.

Standards

• API 600 — Bolted-bonnet steel gate valves for petroleum and related industries.

• API 6D — Pipeline valves within its scope.

• ASME B16.34 — Valve pressure-temperature ratings and construction requirements.

• ASME B16.5 / B16.47 — Applicable flanged connections.

• ASME B16.25 — Butt-welding ends.

• ASME B16.10 — Face-to-face dimensions.

• API 598 — Inspection and pressure testing.