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Gate Valves

Ductile Iron Non Rising Stem Gate Valve

Application

A Gate Valve is used in On/Off applications that do not require throttling. Due to their heavy-duty design and casting, they can handle high temperatures and are durable under constant, lower pressures while media is able to flow in both directions.

Gate Valve Range

Ductile Iron Rising Stem Gate Valve Flanged VT84N

Weight: 15kg – 870kg

Sizes: DN 50 – 600

Class: 150

Pressure: PN16

Temperatures: -10°C to 400°C

Ductile Iron Non-Rising Stem Gate Valve Flanged VT68N

Weight: 14kg – 780kg

Sizes: DN 50 – 600

Class: 150

Pressure: PN16

Temperatures: -10°C to 400°C

Brass Gate Valve Screwed BSP and Non-Rising 201

Weight: 250g – 6kg

Sizes: DN 15 – 100

Class: 125

Pressure: PN14

Temperatures: -2°C to 120°C

Cast Iron Rising Stem Gate Valve Flanged VT84

Weight: 16kg – 1,341kg

Sizes: DN 50 – 600

Class: 125

Pressure: PN14

Temperatures: -10°C to 230°C

Cast Iron Non-Rising Stem Gate Valve Flanged VT68

Weight: 14kg – 780kg

Sizes: DN 50 – 600

Class: 125

Pressure: PN14

Temperatures: -10°C to 230°C

Gate Valve Price and Stock Availability

Please click here to review Valvetech T&C’s. Price and Stock are subject to change. All prices Exclude Drilling and are Exclusive of VAT. Last Updated: 20/05/2024

Brass Gate Valve Price and Stock Availability

Please click here to review Valvetech T&C’s. Price and Stock are subject to change. All prices Exclude Drilling and are Exclusive of VAT. Last Updated: 20/05/2024

Application

When fully opened, the Gate Valve wedge disc is completely removed from the space within the valve, removing all resistance to the flow of media resulting in little pressure drop. Because there is the absence of any valve components within the tunnel when it is fully opened, high-viscosity slurries such as pulp and mining solids or sludge can travel through without obstruction, preventing blockages.

When the valve is fully closed, the disk-to-seal ring surface creates a 360° contact, which enables good sealing via the wedge. This means that very little or no leakage occurs across the disk, no matter the volume of media or the pressure behind it and the media can flow in both directions.

Advantages:

  • Unchanged dimensions when open or closed, so the installation space is smaller if a Non-Rising Stem is used. A Rising Stem makes it easy to identify from a distance as to whether the valve is open or closed
  • High-temperature resistance enables the valve to withstand elevated temperatures without significant degradation, warping or deterioration
  • Cheap and easy maintenance due to their simplicity in design, making them one of the most common valves for industrial applications
  • Versatility in applications provides for a wide range of fluids, including liquids, gases, and slurries making them suitable for every industry
  • Low pressure drop and full flow provide a straight-through, unobstructed flow path when fully open, minimising pressure drop allowing for efficient and high-capacity fluid flow

Disadvantages:

  • As the stem is static and enclosed, it is difficult to lubricate or refurbish; consider a Butterfly Valve if lubrication or refurbishment is a concern
  • The medium being used in the valve subjects the stem to erosion and it is easier to damage the threads; consider a Swing Check Valve if thread damage is a concern
  • Not made for throttling as this creates turbulence and frictional losses within the body of the valve; consider a Globe Valve throttling is a requirement
  • Turbulence created by throttling results in vibrations which damages internal parts; consider a Globe Valve if turbulence is a concern
  • Handwheel operation is slower as a longer stem means more rotations to fully open or close (however the motion of movement is noticeably light to operate); consider a Butterfly Valve if operability is a concern

Common Industry Uses:

  • Underground piping or buried installations
  • Clean liquid and gasses, and Heating and Conditioning (HVAC)
  • Potable water applications
  • Wastewater, water treatment, and distribution systems
  • Corrosive mediums such as diesel, petroleum and acids

Gate Valve Specifications

Services

Petrochemicals and Petroleum, Refineries, Primary Energy, Agriculture, Water Works, HVAC

Industries

Water, Oil, Gas, Steam

Priority Media

Acetylene, Borax, Butane Gas, Carbon Dioxide, Castor Oil, Caustic Soda, Detergents, Diesel Fuels, Hydraulic Oil, Linseed Oil, Nitrogen, Propane Gas, Steam, Tributyl Phosphate

For full Gate list, see Media Compatibility Table

Also Known As

Insider Screw Valve (Non-Rising)

Outside Screw and Yolk (OS+Y; Rising)

Rotational Stem Design Gate Valve

Non-Rising Stem Wedge Gate Valve

Rising Stem Wedge Gate Valve

Sluice Valve

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