--- title: "Gate Valve Selection Guide: Types, Working Principle and Applications" date: 2026-08-03T09:25:00Z modified: 2026-08-25T09:41:08Z permalink: "https://www.tgvalve.com/blog/gate-valve/gate-valve-selection-guide-types-applications/" type: post status: publish excerpt: "" wpid: 2923 categories: - Gate Valve featured_image: "https://www.tgvalve.com/wp-content/uploads/2026/08/image-84.webp" featured_image_alt: Industrial workers operating a gate valve in a facility, with text overlay for a guide on gate valve selection, types, working principle, and applications timestamp: 2026-08-25T09:41:08Z tags: - Gate Valve --- ## Quick Answer: Gate Valve Selection Guide. A gate valve is an on/off isolation valve, rather than a throttling device. It opens or closes by sliding a gate straight up or down across a pipe bore. TG Valve manufactures gate valves in wafer, lug, and semi-lug connection types. The valves are certified to API 600, API 603, and ASME B16.34. This guide helps you match the right type, stem design, and body material to your pressure, temperature, and media before ordering. ## What Is a Gate Valve and What Does It Do? Gate valves are linear-motion valves used for full on or full off isolation. They are not designed to throttle flow. They work by raising or lowering a flat or wedge-shaped gate perpendicular to the flow’s direction. Gate valves are mainly used for pipeline isolation, isolating flow, and mainline shutoff. When the valve is open, the gate lifts fully off the bore. This allows the flow to pass through with no restriction. When closed, the gate seats fully across the bore and stops the flow completely. Running the valve partly open causes vibration and rapid wear on the seat and disc. Hence, it should never be used for flow regulation or throttling. ## How Do Gate Valves Work? The gate valve working principle shows that turning the handwheel drives the stem. This raises or lowers the gate at a right angle to the flow path. This valve type has a simple operating sequence: 1. When the valve is closed, the gate is lowered between the seats. When the gate touches the seat rings, it blocks the pipe and seals off downstream equipment. 2. When the valve is open, turning the handwheel rotates the threaded stem. The stem lifts the gate upward, which clears the passage. 3. When the valve is fully open, the gate is completely removed from the flow stream. The fluid then passes through a full-bore opening with minimal resistance. 4. Rotating the stem in the opposite direction lowers the gate until it contacts the seat. This action closes the valve. ## What are the Components of a Gate Valve? The main gate valve components are the body, bonnet, gate, stem, seat rings, and handwheel. The body holds the flow path and is connected to the pipe. The bonnet houses the stem and seals the top of the body. The seat rings create a surface for the seal. Here is a diagram of the gate valve components: ![EXPLODED CROSS-SECTION OF A GATE VALVE](https://www.tgvalve.com/wp-content/uploads/2026/08/image-85.webp) ## What are the Four Types of Gate Valves? There are four main gate valve types that are based on the structure. 1. A wedge gate valve is used by most standard petrochemical lines. They are grouped by how the wedge disc is shaped. 2. A solid wedge gate valve uses a single, one piece disc and handles turbulent flow easily. This makes it the common choice among industrial flow control applications. 3. A flexible wedge gate valve has a split hinge that flexes as the pipe heats and cools. This is ideal for high temperature steam service. 4. Split wedge valves use two independent disc halves that self-align in low pressure lines. Parallel slide valves use flat discs with a spring loaded seal. These valves are common in power plant steam isolation. ## Rising Stem or Non-Rising Stem: Which One Do You Need? Choosing between a rising stem or non-rising stem depends on how much space is required. It also depends how easily you can check valve position. A rising stem gate valve, or OS & Y gate valve (outside screw and yoke), raises the stem above the handwheel as it opens. This design is easy to inspect and lubricate because the stem threads sit outside the pressure boundary. You can also see the valve position at a glance. A non-rising stem gate valve keeps the stem inside the body. This valve design is ideal for buried lines or installs with limited headroom. ## What Bonnet and Material Options Should You Consider? When selecting bonnet and material options, you need to match them to your pressure, temperature, and media. The most common choice is the bolted bonnet because it provides easy maintenance access. A pressure seal bonnet tightens as internal pressure rises. It is ideal for high pressure and high temperature service. Moreover, a welded bonnet offers a permanent, leak-tight seal. But it cannot be opened for repair. When choosing materials, cast iron, carbon steel and stainless steel are the top options. - Cast iron fits low pressure water lines. - Carbon steel (WCB) is recommended for general industrial and oil and gas duty. - Stainless steel is ideal for corrosive media in chemical and flood processing lines. ## What Standards Should Gate Valves Meet? Gate valves should meet standards such as API 600, API 603, API 6D, and ASME B16.34 to prove compliance. Standards compliance tells a buyer the valve was designed, tested, and rated by documented rules, not guesswork. - API 600 covers steel gate valves for general refinery and petroleum service. - API 603 covers corrosion resistant designs. - [API 6D](https://www.tgvalve.com/wp-content/uploads/wp-mfa-exports/post/what-is-api-6d.md) governs pipelines valves. - ASME B16.34 sets the pressure and temperature ratings across these designs. TG Valve manufactures its gate valve line based on these standards. The company also performs in-house testing and documented material traceability on every batch. Buyers can verify what they are purchasing before it ships. ## How Do You Select the Right Gate Valves for Your Application? Gate valve selection comes down to matching the valve to real operating conditions, not just price. ### Step 1: Check Process Media Check for corrosion, particulates, or high viscosity that could affect seat wear. ### Step 2: Match Ratings Match the pressure class and temperature range to the valve’s ASME B16.34 rating, with ample margin for surges. ### Step 3: Confirm Dimensions Confirm the line size and end connection type fit your existing pipework. Connection types are flanged, threaded, or welded. ### Step 4: Finalize Position Decide whether you need visual position indication. This means that you need an OS&Y gate valve rather than a non-rising stem valve. ## Where Are Gate Valves Used in Industry? Gate valves are commonly used throughout an industry that requires on/off isolation valves. Their primary functions are to shut off a pipeline or equipment item, or isolate a section for operation, emergency shutdown, or maintenance. Below are the common gate valve applications that use gate valves which are designed for isolation duty, including maintenance isolation and equipment removal. | **Industry** | **Typical gate-valve locations** | **Main service** | | --- | --- | --- | | [Oil and gas](https://www.tgvalve.com/wp-content/uploads/wp-mfa-exports/page/oil-gas-pipeline-valve-solutions.md) | Wellheads, gathering lines, transmission pipelines, manifolds, tank farms, pump and compressor stations | Crude oil, natural gas, refined products, and hydrocarbon isolation | | Refineries and petrochemical plants | Process-unit boundaries, hydrocarbon transfer lines, reactor and vessel connections, FCC and coker units | Isolation of high-pressure, high-temperature, or flammable process fluids | | [Power generation](https://www.tgvalve.com/wp-content/uploads/wp-mfa-exports/page/power-generation-valve-solutions.md) | Main steam lines, boiler feedwater, cooling-water systems, turbine auxiliary lines, boiler drains | Steam, condensate, feedwater, and cooling-water isolation | | Water and wastewater | Water-treatment plants, pump stations, distribution mains, dam outlets, raw-water intakes | Large-diameter water and treated-water isolation | | [Chemical processing](https://www.tgvalve.com/wp-content/uploads/wp-mfa-exports/page/valve-solutions-for-chemical-petrochemical-processing.md) | Reactor feed lines, chemical storage tanks, transfer lines, process headers, and utility systems | Isolation of corrosive, toxic, or high-purity process fluids | | Marine and offshore | Ballast systems, seawater cooling, firewater, cargo-transfer systems, and platform process piping | Seawater, hydrocarbons, firewater, and utility isolation | | Mining and minerals | Slurry pipelines, process-water lines, tailings systems, and concentrator equipment | Water, abrasive slurry, and mineral-processing fluids | | Pulp and paper | Stock-preparation lines, process-water systems, chemical dosing, and utility piping | Water, chemicals, pulp stock, and steam | | Manufacturing plants | Compressed-air headers, cooling-water circuits, fuel lines, steam, and general process piping | Utility and process-fluid isolation | ## Gate Valve vs Ball Valve vs Globe Valve: Which Should You Choose? In a [gate valve vs ball valve](https://www.tgvalve.com/wp-content/uploads/wp-mfa-exports/post/differentiating-butterfly-valve-vs-ball-valve-vs-gate-valves.md) comparison, the ball valve seals with a quarter turn and shuts off faster. This design gives a fuller bore and lower pressure drop once open. On the other hand, in a gate valve vs globe valve comparison, the globe valve throttles flow through repeated cycles. This valve is built only for full open or full closed duty. | **Feature** | **Gate Valve** | **Ball Valve** | **Globe Valve** | | --- | --- | --- | --- | | Primary use | Full on/off isolation | Fast on/off shutoff | Throttling & flow control | | Flow path | Straight, full bore | Straight, full bore | S-shaped, restricted | | Actuation | Multi-turn (slow) | Quarter-turn (fast) | Multi-turn (slow) | | Pressure drop (open) | Low | Low | Higher | | Best fit | Pipelines, isolation points | Frequent cycling, tight shutoff | Control loops, throttling | Choose a gate valve when you need infrequent, full bore isolation rather than flow control. ## What Causes Gate Valve Failure and How Can You Prevent It? Common failure modes include seat and wedge wear from throttling, stem packing leaks, and gate binding after long idle periods. Prevent issues by cycling the valve regularly, inspecting packing during routine maintenance, and lubricating OS&Y stem threads. Matching the valve type to the service in the first place, as covered above, prevents most of these issues before they start. ## Why Choose TG Valve for Your Gate Valve Supply? [Certified Valve Manufacturer-CTGV Founded in 1985, CTGV Valve Group produces factory-direct industrial valves certified by CE, API, ISO – no intermediaries, just results. View Products ](https://www.tgvalve.com/product/)Choose the right gate valve by matching the disc type to your flow. Then, select the stem, bonnet, and pressure rating to fit your space and media. TG Valve manufactures its valve range under API 600, API 603, and ASME B16.34. We provide documented material certificates and in house pressure testing on every order. We supply solid wedge, flexible wedge, OS&Y, and non-rising stem valves in carbon or stainless steel. These fit oil, gas, water, and power projects. Buyers can request mill test reports and third party inspection before shipment. 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