Tools To Replace A Bellows Gate Globe Valve

Posted on January 31, 2012 by admin

Bellows Globe Valve pressure seal globe valve
The main cutoff valve for the water line entering most homes is a Bellows Gate Valve. These are simple valves with a swing handle type of control. When the handle is aligned with the pipe, the water is on. When the handle is perpendicular to the pipe, the water is off. While these valves tend to be durable, some of them will need to be replaced as they age or when new water pipes are installed.
Pipe Cutter
The pipe cutter slices through copper tubing and pipe. This specially designed tool employs a sharpened cutting wheel to shear through a pipe’s exterior wall. A pipe cutter’s blade protrudes from the interior of a C or U shaped body. A turn of the tool’s knob causes the body’s mouth to open or close. A plumber places copper tubing or pipe inside of the mouth, tightens the cutting disc against the pipe’s exterior and turns the tool around the pipe until the disc shears through its wall. The pipe cutter creates a burr and shaving-free cut, leaving the pipe ready for sanding and soldering. Pipe cutters quickly and cleanly remove gate valves from in-line locations and cut replacement pipes to desired size.
Soldering Torch
The soldering torch heats gate Bellows Globe Valve connections, copper pipe and fittings during the soldering process. A soldering torch consists of two basic parts: a fuel tank, commonly propane, and a torch tip. The torch tip attaches to a threaded connection atop the fuel cylinder. A knob on the torch tip’s side allows a plumber to open, close and control fuel flow from the cylinder. A plumber opens the fuel valve, lights the gas with a spark and holds the flame against a valve, pipe or fitting. The plumber presses solder against the heated joints, the solder melts, flows around the joint and cools to create a solid weld.
Emery Cloth
Essentially a type of sandpaper, emery cloth abrades and cleans the exterior of pipes prior to soldering. Emery cloth arrives in a long, rolled strip. A plumber tears a small piece of emery cloth from its roll, wraps it around a pipe’s end and sands the copper surface until clean and shiny. Build-up, grease and oxidation on a pipe’s surface prevent solder from creating a solid weld; emery cloth prepares metal surfaces to accept solder.
Tubing Brush
The tubing brush cleans the interior of fittings, such as Gate Valve solder connections. This brush appears as a series of thick bristles protruding from the end of a wire rod. A plumber inserts the bristled end of the brush into a pipe fitting or gate valve solder connection and twists the brush to abrade and clean the surface. Like emery cloth, the tubing brush prepares a metal surface for welding.

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The Way To Solder Lug Butterfly Gate Valves

Posted on January 11, 2012 by admin

Lug Butterfly Valve
A Slab Gate Valve is a low-tech solution for controlling the flow of fluids within pipes. It has been used for more than 100 years. A gate valve works by raising and lowering a gate into a seat with a screw mechanism to control the flow. One of the weaknesses of the gate valve is that is shouldn’t be left in a partially open position. If left like this, the closure element will become worn, thus losing its seating integrity.
1 Turn off the water where the water main enters the house. Open faucets to the water lines before making cuts to any pipes.
2 Cut out a section of pipe in the water line the gate valve is being soldered into. Remember that each end of the cut copper pipe will be pushed into the gate valve anywhere from 1/2 to 3/4 inch on each side. Subtract those measurements to determine the accurate amount of pipe to cut out. Slip the pipe into the jaws of the pipe cutter and screw the handle to close the jaws. When the rotating cutting wheel bites into the surface of pipe, stop and rotate the cutter 360 degrees. Tighten the handle a bit more and swivel the cutter again. Repeat until the pipe is cut all the way through.
3 Dry-fit the gate valve into place in the copper water line after the correct amount of copper pipe has been cut out to check for proper fit.
4 Pull the gate Lug Butterfly Valve back out of the pipe line and clean the ends of the copper tubing using the copper pipe cleaning brush. Insert each end of the copper pipes into the corresponding hole in the tool and twist the tool back and forth. The brush bristles will clean the surface of the metal. Clean 1 inch in from each cut end of the copper tubing. Make sure the copper tubing is shiny an bright looking. This indicates the copper is properly clean.
5 Insert the end of the inside tube cleaning brush into both pipe openings of the gate valve and twist vigorously to thoroughly clean the surfaces.
6 Brush paste flux on the inside of both openings in the gate valve. Brush paste flux on both ends of the cleaned copper tubing.
7 Insert the copper tubing into both sides of the gate valve as in Step 3. Turn the handle of the gate valve to the open position.
8 Hold the wire solder in your nondominant hand and light the propane torch and hold it in your other hand. Position the end of the blue flame near the first solder joint where the copper pipe and gate valve meet. Heat until the flux bubbles up and turns a gooey brown–a sign that the metal is almost hot enough to melt the solder.
9 Touch the tip of the wire solder to the solder joint and wait for it to melt and flow around the joint seam. Pull the torch away immediately and wipe the joint with a very wet cloth to clean away any excess solder.
10 Repeat Steps 6 and 7 for the second solder joint.
The article comes from Gate Valve.

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Flow Characteristics of a Ball Valve

Posted on January 5, 2012 by admin

Floating Ball Valve trunnion mounted ball valve
Valves are junctions in pipes and flow lines that control the flow of the fluid through the system. Some valves are designed to let fluids through at a specific pressure, while others are designed to let fluid through only when it reaches a certain temperature or volume. Some valves are manual and can be turned on or off by hand, while others do their work automatically. The Ball Valve is a versatile type of valve often used in machinery applications.
Ball Valve Fully On
When a ball valve is fully on, it is very free-flowing. Since the hole diameter is the same diameter as the pipe, no restrictions are present. This is not true for a gate or a butterfly valve. The internal components of these valves partially block the flow. According to Clarkson University, these free-flow characteristics mean ball valves are ideal for slurry feeds. Other valves would block the heavy particulates suspended in the liquids. The particulates will eventually pile up, and start blocking flow if other valves are used.
Ball Valve Fully Off
Clarkson University states when a Floating Ball Valve is fully off, it has excellent sealing capabilities. Because the rotating ball seals tightly against the seat, it is an ideal valve for thin fluids like water. Furthermore, heavy slurries will not damage it, because the wiping action wipes particulates away from the face. With gate and butterfly valves, leakage is possible, especially if the valves are old.
Ball Valve Flow Control
Flow control is the ball valve’s weakness. A ball valve should not be used for a trickle-on to full-on applications, since flow control is not precise. Controlling the flow from just a little on to fully on is called throttling. Engineers concur that a ball Swing Check Valve is not the best choice for throttling. One problem created is called choked flow. Choked flow occurs when the pressure drops or rises suddenly, and leads to internal pipe damage. For throttling, other types of valves should be used. A ball valve should only be used for a full-on or a full-off application, like an on-off switch for a light.

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Repair Slab Bellows Gate Valves

Posted on December 28, 2011 by admin

Bellows Gate Valve Slab Gate Valve actuated gate valve
Spas or hot tubs house plumbing that enables the spa to circulate water properly. Spa plumbing comes in many forms and consists of a series of tubes and valves. One valve commonly used in spa plumbing is the Bellows Gate Valve. Gate valves either allow water to flow through a pipe or completely stop water flowing through a pipe. Gate valves consist of a handle, stem and gate. Turning the valve’s handle rotates the stem which lowers or raises the gate to shut off or allow water flow.
1 Shut off the water before the gate valve by closing a valve upstream of it. You may have to close the main water valve to the home if there is not another option. If it is your main water valve that needs repairing, you will need to contact the city to turn off the water at the street. Open a valve downstream of the gate valve to remove the pressure from the pipes.
2 Remove the turning mechanism from the Slab Gate Valve with the appropriate tools. Most turning mechanisms will be secured by a single slotted screw in the center of the handle. Loosen this screw to remove the turning mechanism.
3 Remove the retaining nut from the top of the gate and then remove the gate from the valve by turning it counter-clockwise. Examine the gates stem washer for evidence of damage. If the stem washer is damaged, replace it with a new part from the hardware store.
4 Remove the Gate Valve seat with a seat removal tool. The seat removal tool maybe specific to your faucet. Examine the valves seat for evidence of damage. If the seat is not smooth or uniform replace it with a new seat.
5 Reassemble the faucet the same way you to took it apart. Test it by turning on the water supply.

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Check Valve Types

Posted on December 20, 2011 by admin

Swing Check Valve
A dual or double check Trunnion Mounted Ball Valve works the same as a normal check valve. The only difference is that there are two places where water can be stopped instead of one. A check valve is used to keep the flow of liquid moving in one direction and not to back flow up the pipe. It is used frequently in connection with city water supplies and sewer systems. The device in the check valve that keeps the water from flowing backward can be made up of a ball, disk, flap or some other obstacle that will block the flow of water.
Types
There are several types of check valves that are installed in water-using devices, but they are all based on the same underlying principle. A ball check valve consists of a ball held in place by a spring. When the water flows forward, the spring contracts and the ball is pushed away from the opening of the valve. Therefore, the water can flow through the valve. When the water stops flowing, the spring pushes the ball back into the opening in the valve and stops the water from flowing backwards.
Swing Check Valve work in a similar way. Instead of a ball, swing valves contain a small door on hinges. When the water flows by the door, the door swings back on its hinges and allows the water through. When the water stops flowing, the door slams shut and stops any backflow from forming.
Similarly, a split-disk check valve contains a metal plate that folds in half as the water flows past it. When the water stops flowing, the plate springs open and blocks the entrance of the valve.
The article comes from Gate Valve.

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Compare Butterfly Valve With Swing Check Valve

Posted on December 11, 2011 by admin

wafer Butterfly valve
A butterfly valve is a quarter-turn rotational motion valve, that is used to stop, regulate, and start flow. Butterfly valves are easy and fast to open. A 90° rotation of the handle provides a complete closure or opening of the valve. Large Butterfly valves are usually equipped with a so-called gearbox, where the handwheel by gears is connected to the stem. This simplifies the operation of the valve, but at the expense of speed.
Advantages of Butterfly Valve
Compact design requires considerably less space, compared to other valves
Light in weight
Quick operation requires less time to open or close
Available in very large sizes
Low-pressure drop and high-pressure recovery
Disadvantages of butterfly valves
Throttling service is limited to low differential pressure
Cavitation and choked flow are two potential concerns
Disc movement is unguided and affected by flow turbulence
A basic Swing Check Valve consists of a valve body, a bonnet, and a disk that is connected to a hinge. The disk swings away from the valve-seat to allow flow in the forward direction, and returns to valve-seat when upstream flow is stopped, to prevent backflow.
The disc in a swing type check valve is unguided as it fully opens or closes. There are many disk and seat designs available, in order to meet the requirements of different applications. The valve allows full, unobstructed flow and automatically closes as pressure decreases. These valves are fully closed when flow reaches zero, in order to prevent backflow. Turbulence and pressure drop in the valve are very low.
The article comes from China Knife Gate Valve.

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Different sorts of Gate Valves that Exist from the Market

Posted on December 8, 2011 by admin

rising stem wedge gate valve

Gate valves can be the typically utilized valves to available and near the avenue of the fluid from straight collection mediums. A gate valve could possibly locate purposes within of very a few areas. For example, these valves could possibly be utilized to the intent of irrigation as well as in numerous substance crops to control the flow of unique sorts of fluids.

There are many methods to classify gate valves. In fact, these valves exist within of a range of styles to provide appropriate features for unique applications. every sort of gate valves is standard for its acceptance in unique fields. like a valve dealer, you must provide unique sorts of gate valves to the customers. The pursuing discussion will help you evaluate about probably the most standard sorts in detail.

Gate Valves in unique Materials

There are many standard products which could be utilized for production gate valves. individuals created from bronze and brass are among the standard varieties. numerous types of iron, which consists of cast metal and ductile iron, as well are utilized for gate valve manufacturing. among the unique types of steel, stainless steel, forged steel, cast carbon metal and alloy metal can be the exceptional products for durable gate valves. Finally, there are valves created from gun metal which you can acquire from unique manufacturers.

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Bellows Seal Globe Valve Empty Performance

Posted on November 21, 2011 by admin

Bellows Seal Globe Valve
When used in a horizontal pipe bellows valve electric valve gate valve is a relatively new category, it has its own unique structure, some advantages, such as the switch is no friction, sealing is not easy to wear, a small opening and closing torque. This reduces the actuator with the specifications. Together with the multi-turn electric actuators can be realized mediators and tight cut. Widely used in petroleum, chemical industry, urban water supply and drainage and other demanding cutting conditions, must be guaranteed in accordance with bellows globe valve manufacturer specified angle in the horizontal pipe installed Bellows Globe Valve, or in the process equipment operation, the diaphragm valve Clear encounter some problems, can not fully discharge valve in the media. However, different types of diaphragm valves, bellows different manufacturers cut-off valves, diaphragm valves of different nominal flow of the installation angle is different, often to the sterile process equipment design and manufacturing has brought a lot of trouble. In the T-structure of the bellows globe valve, the empty body problem is even more evident.
Compared with the bellows globe valve, Vesta bellows valve is not such a problem, regardless of Vesta bellows globe valve body is a structure which, in the process equipment will not load when running a “dead” to cut off the pipeline to ensure tight. Moreover, it can be mounted or installed in accordance with the different equipment in a sterile process piping systems.
In the pharmaceutical manufacturing, sterile process equipment by a number of horizontal pipe and vertical pipe components, in the pharmaceutical equipment design, due to the pipeline location and technical reasons, must be installed in a specific location using this bellows valve. For example, if the vertical pipe installed Bellows Globe Valve, shall be in the same horizontal plane via a 90 ° elbow connection. The T-structure of the diaphragm of the production costs so high, with a different body structure compared to the shape of the diaphragm, bellows valves in the size and shape, and the connection pipe installation advantages. The structure of two types of valve types, therefore, early aseptic process equipment design, all parts should be selected to be a good choice of which type of valve.
In the pharmaceutical, food and biotechnology in the output device has a lot of need for disinfection of the valve. The large valve, such as Stericom series, in which the occasion required disinfection is almost useless. Because the devices in these processes require less and less quality of delivery of the referral, the less traffic, people almost invariably choose the diaphragm. The new Bellows Globe Valve has a smaller size, can be equipped with different pipe diameters used in this more competitive than the diaphragm.

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Manual knife gate valve and installation of structural features

Posted on October 8, 2011 by admin

Manual Knife Gate Valve with a simple and compact structure, reasonable design, light and materials, sealing, reliable, light and flexible operation, small size, channel flow, flow resistance, light weight, easy to install, easy to disassemble, etc., can be working pressure 1.0MPa-2.5MPa, Temperature -29-650 ℃ under normal work. Knife gate valve with a cut of its function, can scrape the surface of the adhesive material sealing automatically clear debris, stainless steel gate to prevent corrosion caused by seal leakage.

The installation of manual knife gate valve

1. Should be checked before installation and sealing surface of the valve cavity and other parts, does not allow any dirt or sand attached;

2. The bolt joints require even tighten;

3. Check the packing requirements of pressed parts, both to ensure the tightness of packing, but also to ensure that gate open and flexible;

4. The user before installing the valve, must be calibrated valve type, connection size and flow of media attention, to ensure consistency with the requirements of the valve;

5. The user to install the valve, the valve driver must reserve the necessary space;

6. Drive circuit diagram for the wiring required;

7. Knife gate valve must be regularly maintained, are not free to collision and compression, so as not to affect the seal;

The main performance specifications of manual knife gate valve:

Nominal pressure (mpa) Shell test (mpa) Seal Test (mpa) working temperature for media 1.0 1.6 1.5 2.4 1.1 1.8 ≤ 900 ℃ paper pulp, sewage, coal slurry, ash, slag-water mixture the main component material body knife gate valves, gate valve stem sealing surface is not covered Stainless steel, carbon steel, gray iron, carbon steel, rubber, PTFE, stainless steel, carbide.

News from : http://taiyivalves.artician.com/blog/2011/05/manual-knife-gate-valve-and-installation-of-structural-features/

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How to find a Knife Gate Valve supplier on the internet?

Posted on September 26, 2011 by admin

Some people would like to find suppliers from the internet. Because the internet contact such as email and msn (the most common IM tool in business) is no cost and fast.

Here I give you an idea a very common way to search sellers on the internet.

For example: you are looking for a Knife Gate Valve and Cryogenic Gate Valve

The most common search engine: www.google.com www.yahoo.com www.msn.com

Maybe you consider that go to the search engine and type “Knife Gate Valve”,how ever you would to easy to get the suppliers, you would always find some Knife Gate Valve online shop.They only sell to the personal.

So please try Knife Gate Valve manufacturer or Knife Gate Valve wholesale, because the suppliers of Knife Gate Valve named themself as a manufacturer or wholesalers.

Now try again,you will more easily to find the suppliers now.

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