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plug valve

4 in-depth engineering guides on plug valve — specification, selection, testing and procurement.

Everything on plug valve

Vajra's engineering team has published 4 technical guides covering plug valve for industrial valve selection, specification, testing and procurement. Browse the full set below.

Plug Valve Design and Applications: Lubricated, Sleeved & Eccentric Types

Plug valves are often overlooked in favour of ball valves, but they offer distinct advantages in multi-port configurations, viscous or dirty service, and natural gas distribution where their full-bore design and reliable shut-off make them the preferred choice. This guide covers all plug valve types - lubricated, RPTFE-sleeved, and eccentric - with applications and selection criteria.

2026-05-177

Plug Valve Types - Lubricated vs Non-Lubricated vs Eccentric: Complete Guide

Plug valves are one of the oldest valve designs - a tapered or cylindrical plug with a through-port that rotates to open or close flow. In modern plants they occupy a specific niche alongside ball valves: lubricated plug valves for crude oil and heavy product pipelines, non-lubricated PTFE-sleeved designs for chemical service, and eccentric plug valves for slurry and abrasive service. This guide explains the three main types.

2026-05-058

NYC DEP Approved Valves: Knife Gate, Plug Valve, Ball Valve Specifications for Water and Wastewater

NYC DEP (New York City Department of Environmental Protection) manages one of the largest municipal water and wastewater systems in the world - 1.1 billion gallons of drinking water daily, 7,000+ miles of water mains, and 14 wastewater treatment plants serving 8.5 million people. This guide covers the valve types, material specifications, and approval standards that NYC DEP specifies for its infrastructure projects.

2026-04-277

Plug Valve Types and Selection Guide: Lubricated, Eccentric and Lined

Plug valves use a tapered or cylindrical plug to provide quarter-turn on/off isolation. This guide compares lubricated, non-lubricated, eccentric and lined designs, covering construction, pressure ratings, standards and industry applications.

2026-03-208