Gate, Globe, And Check Valves

Inventory

First Distributors Offers a wide array of gate, globe, and check valves in carbon steel, stainless steel, and even exotic alloys. With sizes starting at ¼”, and pressure classes ranging from 150# - 2500#, we can supply gates, globes, and checks to meet whatever requirements your project has. 





	SIZE RANGE:¼” – any size




	GATE:Wedge, Knife




	GLOBE:T-pattern, Y-pattern, 90-pattern




	CHECK:Swing, Wafer, Piston




	PRESSURE CLASS:150# - 4500#




	END CONNECTIONS:Flanged, Threaded, Socket Weld, THD x SW, Butt Weld




	PORT:Full Port, Reduced Port




	BONNET:Bolted, Welded




	MATERIAL:Carbon steel, stainless steel, exotic alloys




	TRIM:API trim #’s 1-18

Materials Available

The two most common specs for carbon steel valves are A105 and A216. If you need one or the other, be sure to specify. A105 is the spec for forged carbon steel while A216 is the spec for cast carbon steel. See below for more detail on how cast and forged steel are created. Generally, forged steel is stronger than cast steel. Also, it is important to note the different sizes ranges that are available in both forged and cast steel. While cast steel valves can be made to meet virtually any size requirement for your application, forged steel valves are only available up through 4” due to the sheer energy that is required to forge carbon steel. Casting is a much more viable and speedy alternative when dealing with bigger valves. If you’re dealing with a smaller high-pressure application, then maybe consider forged steel.

Cast Steel -

The body for a cast valve is created by heating the material until molten. While in this molten or liquid state, the material is poured into a mold to crate the desired cast or shape.

Forged Steel

Forged valves are created using the application of thermal and mechanical energy to steel billets or ingots change the shape of the material while it is in a solid shape.
After carbon steel, the most common material that a valve body will be made of is stainless steel. Usually, this material is 316/316L, but we also offer valves in more exotic grades of stainless such as 321, 347, and more!

Trims Available

The trim refers to the material that makes up the internal elements of a valve. Please see First Distributor’s handy trim chart for assistance in deciding which trim you need for your valve.





	TRIM NO 1SEATWEDGESTEM






	113 CHROME13 CHROME13 CHROME




	2304304 A76 304




	3310310A276 310




	4HARD 410HARD 410410




	513 CHROME W/STELLITE 6 FACING13 CHROME W/STELLITE 6 FACINGA276 410 OR 420




	5aNI-CRNI-CR410




	613 CHROME W/30% MIN NICKEL FACINGNI-CRA276 410 OR 420




	7HARD 410HARD 410410




	813 CHROME W/STELLITE 6 FACING13 CHROMEA276 410 OR 420




	8ANI-CR410410




	9MONELMONELMONEL




	10316316A276 316




	11MONEL W/STELLITE 6 FACINGMONELMONEL




	12316 W/STELLITE 6 FACINGA276 316A276 316




	13ALLOY 20ALLOY 20B473




	14ALLOY 20 W/STELLITE 6 FACINGALLOY 20B473




	15304 W/STELLITE 6 FACING304 W/STELLITE 6 FACINGA276 304




	16316 W/STELLITE 6 FACING 347316 W/STELLITE 6 FACING 347A276 316




	17347347A276 347




	18ALLOY 20 W/STELLITE 6 FACINGALLOY 20 W/STELLITE 6 FACINGALLOY 20

A Guide To Gate, Globe, And Check Valves

Gate

The most common type of valve used. They can be either fully open or fully closed and are not used for regulating flow. Gates are a cost-effective way to provide a quality sealing valve with a high-temperature tolerance.

Knife Gate

This is like your typical gate valve, except the wedge utilizes a sharp, beveled edge to cut through thicker fluid/material.

Globe

Used almost exclusively for throttling or flow modulation. They will only work in one direction. To help you remember this, there is an arrow on the side of every globe valve indicating the direction of flow.

90-degree Pattern (angle)

These globes are shaped like a 90-degree elbow. Although they are suitable for high-pressure applications, they are used most often for water service.

Check

Self-automated valve used to strictly to prevent backflow. Like globes, they work in one direction and have an arrow indicating the direction of flow. Some checks can also be used in vertical applications.

Wafer Check

In a wafer check valve, a split disc rotates on an axis through the center of the valve in order to shut off or allow the flow of fluid.

Piston Check

This valve has an internal piston that moves inside of a sleeve. As upstream pressure and flow become great than downstream pressure, the lifts off the seat and slides up into the sleeve. The fluid in the chamber on top of the piston then begins to compress.

T-pattern Globe (z-body)

This is the standard body pattern for globe valves. If you order a globe and don’t specify a pattern, you will get a valve that has a body shaped like a tee.

Y-pattern Globe (y-body)

Less common than a t-pattern body, y-pattern globes are shaped like a y-lateral fitting and are generally used in more high-pressure applications.

Swing Check

The most common check valve. This valve shuts off the flow of fluid using a disc that “swings” on a hinge or a trunnion.

Wedge Gate

This is your standard gate valve. Also known as a sluice valve, a gate valve opens by lifting a round or rectangular gate/wedge out of the path of the fluid that is running through it.

Full Port Vs. Reduced Port

Gates, globes, and check valves can all be either full port or reduced port. However, most people do not specify a port type when ordering these valves. The standard is a reduced port. Full port valves have no restriction of flow from the original pipe diameter. If the pipe diameter of the valve is 2”, then a full port valve will be 2” wide all the way through. They will maintain a consistent flow rate. The opening in a reduced port valve is smaller than its designated pipe diameter. Reduced port valves are typically less expensive than full port valves and are a good option for use in applications that will be transferring liquids only. If your application will be transferring both liquids and solids, then it might be best to go with a full port valve to avoid clogging the application.

Bolted Bonnet Vs. Welded Bonnet

The bonnet refers to the top or the “cap” on the valve. They can be either bolted on with screws or welded on. A bolted cap makes it easier to disassembled a valve in order to examine or clean it, while a welded cap is better for the structural integrity of the valve.