Gate Valves & Globe Valves & Check Valves
Despite serving very different functions, gate valves, globe valves, and check valves are often spoken about concurrently, due to the many similarities in: construction material grades, trims, and other technical specifications. A more detailed discussion of each individual valve type may be found below.
MSI is a full-line distributor of gate valves, globe valves, and check valves, with a large portfolio of: carbon steel, stainless steel, and exotic alloy. End connections for each gate valve, globe valve, and check valve include: flanged, threaded, and socket weld. With sizes ranging from 1/4” to 36", and pressure classes ranging from 150# - 2500#, MSI can supply the gate valves, globe valves, and check valves to meet the requirements of virturally any piping project.
|SIZE RANGE:||¼” – any size|
|GATE VALVES:||Wedge, Knife|
|GLOBE VAVLE:||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|
|MATERIAL:||Carbon steel, stainless steel, exotic alloys|
|TRIM:||API trim #’s 1-18|
MANUFACTURERS/BRANDS OF GATE VALVES, GLOBE VALVES, & CHECK VALVES
MSI Supply offers premier manufacturers of gate valves, globe valves, and check valves, including: Powell Valves, Beric, Bonney Forge,Crane, KF, Kitz, Nibco, Neway, Smith, VOGT, Velan, WKM, Walworth, Warren, and more!
GATE VALVE, GLOBE VALVE, & CHECK VALVE INFORMATION
Gate Valves are the most common type of valve used. They can be either fully open or fully closed and are not used for regulating flow. Gate valves are a cost-effective way to provide a quality sealing valve with a high-temperature tolerance.
WEDGE GATE VALVES
This is your standard gate valve. Also known as a sluice valve, this gate valve opens by lifting a round or rectangular gate valve/wedge out of the path of the fluid that is running through it..
KNIFE GATE VALVE
This is like your typical gate valve, except this gate valve has a wedge that utilizes a sharp, beveled edge to cut through thicker fluid/material..
The globe valve is used almost exclusively for throttling or flow modulation. Also, globe valves will only work in one direction. To help you remember this, there is an arrow on the side of every globe valve valve indicating the direction of flow.
T-PATTERN GLOBE VALVE (Z-BODY)
This is the standard body pattern for globe valves. If you order a globe valve and don’t specify a pattern, you will get a valve that has a body shaped like a tee..
Y-PATTERN GLOBE VALVE (Y-BODY)
Less common than a t-pattern body, y-pattern globe valves are shaped like a y-lateral fitting and are generally used in more high-pressure applications.
90-DEGREE PATTERN (ANGLE) GLOBE VALVE
These globe valves are shaped like a 90-degree elbow. Although they are suitable for high-pressure applications, they are used most often for water service.
The check valve is a self-automated valve used to strictly to prevent backflow. Like globe valves, check valves work in one direction and have an arrow indicating the direction of flow. Some check valve can also be used in vertical applications.
SWING CHECK VALVE
The most common check valve. This valve shuts off the flow of fluid using a disc that “swings” on a hinge or a trunnion.
WAFER CHECK VALVE
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 VALVE
This check 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, and the fluid in the chamber on top of the piston then begins to compress, which closes the check valve.
MSI offers gate valves, globe valves, and check valves in a wide array of materials, including A105, WCB, LF2, bronze, aluminum-bronze, 316SS, 347SS, cast iron, ductile iron, alloy 20, Hastelloy, Monel/Inconel, F5, F9, F11, F22, and more!
The two most common specs for carbon steel valves are A105 and A216 WCB. It is important to note the different sizes ranges that are available in forged (A105) and cast steel (WCB). While cast steel gate valves, globe valves, and check valves can be made to meet virtually any size requirement for your application, forged steel gate valves, globe valves, and check valves are only available up through 4”. Forging is prohibitively expensive at larger diameters, where casting is a much more cost effective for this size range.
The trim refers to the material that makes up the internal elements of a valve. Please see MSI’s handy trim chart for assistance in deciding which trim you need for your valve.
View our chart showing the pressure tolerances of material at certain temperatures. Available pressure classes for cast steel gate valves, globe valves, and check valves range from 150# - 1500#. The pressure classes available in forged steel are much higher. Forged valves generally start at 800# and are available in pressure classes as high as 4500#.
FULL PORT vs. REDUCED PORT
Gate valves, globe valve valves, 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.