OS&Y Globe Valve - Kinvalve

OS&Y globe valves are types of globe valves with an outside screw and yoke, hence the name. Turning the handle will directly raise and lower the disc by direct interaction with the stem.

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The stem and handle interact together because both are threaded. The stem visibly lowers and raises on the outside of the OS&Y globe valve while the handle remains fixed.

Besides, the wedge inside the globe valve rises in tandem with the stem every time you turn it.

This lets the media flow through the OS &Y globe valve.

It is often very clear whether the OS &Y globe valve is in a closed or open position. This is crucial for adequate fire protection maintenance.

Much of the guesswork about handling the OS &Y globe valve is taken away because of the stem’s visibility.

The OS&Y globe valve’s directions of flow are marked on the body.

OS&Y globe valves come in various end connection types, each with different installation sequences and guidelines.

For Socket Or Butt Weld Ends

Remove all paint, oil, and grease from the piping before you weld the OS&Y into or onto it.

When welding socket end OS&Y globe valves, ensure it bottoms out through the socket weld bore.

Ensure that there is a gap between the socket weld bore bottom and the pipe to prevent damages and cracks. ASME B16.11 standards require this.

Threaded Ends

First, inspect the mating piping and the OS&Y globe valve threads. To ensure the joint compound doesn’t enter into the flow path of the valve, apply it only to the male end.

Our OS&Y globe valves have wrenching lugs forged onto their ends. Use them on the valve end that is nearest to the joint you are tightening.

Flanged Ends

Ensure dimensional compatibility between the flanges on the OS&Y globe valve and their companion flanges on the piping.

Also, ensure that the sealing surfaces don’t have any dirt.

Install the recommended nuts and studs before placing a flange gasket in between the facings of the flange.

Tighten the nuts and studs in a crisscross manner in similar increments. This will ensure the gasket is compressed correctly.

A few key points to note:

• After installing the OS&Y globe valve, clean the line by flushing to expel debris and other foreign objects.
• Pressurize the line and then check the OS&Y globe valve end connections for leakages. Other parts you might want to consider are the stem packing and bonnet-to-body joints.
  If you notice any leakages in the parts, you might have to tighten the packing.
• OS&Y globe valves work in one direction only. Keep this in mind when you’re installing the valve.
  Proper installation means less wear and tear on the valve over time.
• Mount the OS&Y valve vertically on the pipe with the handwheel pointing up. This puts the working parts of the assembly under less pressure.
• Never overtighten the handwheel. Overtightening puts added pressure on the gland packing.
  If there are issues with leaks, it means there’s a problem with the seat or the plug.

You should test the valve frequently to ensure that it is accessible at all times and shows no signs of leaking.

Below are a few guidelines on how to test OS& Y Globe Valve:

The OS&Y globe valve must be fully open to ensure that it is operating correctly. Turn the handwheel in an anti-clockwise manner.

If the valve continues to turn and the stem continues to turn, that’s an indication that the disc has dropped. Hence the OS&Y globe valve is inoperable.

Open the OS&Y globe valve fully until you feel some resistance to it. Also, look at the stem to make sure that it is not moving.

If it is not moving, it means that the OS&Y globe valve is totally engaged and therefore operable.

If your OS&Y globe valve incorporates use of additional electronic supervision or lock and chains, you should inspect and test it every month.

If you have further questions, don’t hesitate to contact field professionals to ensure that you’re doing these tests properly.

These testing and inspection details are based on:-

• NFPA 25 standards for the inspection testing and maintenance of water-based fire protection systems.

Start With Proper Installation & Operation

OS&Y globe valves work in one direction only.

Keep this in mind when you’re installing the valve. Proper installation means less wear and tear on the valve over time.

Mount the valve vertically on the pipe with the handwheel pointing up. This puts the working parts of the assembly under less pressure.

Never overtighten the handwheel. Overtightening puts added pressure on the gland packing.

If there are issues with leaks, it means there’s a problem with the seat or the plug.

Regular Inspection

Set up a regular inspection timetable for your valve systems. How often you do this depends on:-

• The type of fluid that the valve is regulating
• How much pressure is on the valve
• How often the valve is cycled during daily operation

When performing regular inspections, check the outside of the valve for signs of wear.

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If the valve doesn’t operate regularly, cycle the valve at the time of inspection. This keeps the disc from becoming stuck in the seat.

Then dismantle the valve so you can check interior parts. Note, before you disassemble, make sure to turn the pressure off and let it cool before you handle it.

External OS&Y Globe Valve Maintenance

Check the motion of the stem, which is often the threaded piece exposed to the elements and can quickly become dirty or gritty.

Lubricate it often to ensure the smooth function of the valve.

If any external hardware (nuts, washers, bolts) shows signs of wear, replace them.

Tighten the hardware during regular maintenance, since these components tend to loosen with frequent use of the valve.

Clean the outer surfaces with a cleaning solution and scrape away any build-up. Ensure that there’s no grease on the handwheel to prevent it from slipping when turned.

Internal OS&Y Globe Valve Maintenance

Disassemble the valve according to the instructions then check all of the internal parts for wear and tear.

Inspect the interior of the valve body and bonnet and remove any scale or residue build-up. Then check the plug and the seat.

Sand down minor scratches using an abrasive compound. Or use machine tools to lap down more significant scratches.

When the valve is shut, it puts pressure on the gland packing, compressing it. Over time, it can become hard and lose its ability to hold pressure. Replace the gland packing if this happens.

When you reassemble the valve, use new O-rings and gaskets to ensure a tight seal.

In The Case, The Handle Stops Moving Or The OS&Y Globe Valve Leaks

Each OS&Y globe valve has packing screws or a packing nut. They play a vital role as they are responsible for holding the components in place.

Your valve may leak if they are too loose or too tight. Adjust to required tightness.

The packing being too tight may cause another problem, i.e., the handle getting stuck. Don’t forcefully move the handle as this may cause further damage.

Instead, loosen the packing screws or packing nut a little. The packing being too loose may also be a cause of OS&Y globe valve leakage.

Use an ordinary wrench to tighten the packing screws. This is a simple procedure that does not necessarily require professional plumbers.

A ball valve and OS&Y globe valve are two of the most commonly used valves for a standard water central installation.

Both valves share the same functionality.

They are the on and off switch for your water main. When the valve is open, water will flow through your pipe and valve.

When the valve is closed, all water will stop at the valve.

Each of the two valves is required to be used differently on different sizes and types of pipes.

The ball valve functions precisely as it sounds.

There is a ball inside the valve that turns when the valve is opened and closed.

It functions when the handle is moved on a ninety-degree or a quarter turn.

When the ball valve handle is in line with the valve, it means that the valve is in the open position.

When you quarter turn the valve, and it is in the perpendicular position, it is in the closed position.

An OS&Y (outside screw and yolk) globe valve is primarily used for:-

• Any water main that is 3″ or larger
• Any water main that is feeding water to the building for fire protection. The water is controlled by a disc that lowers and raises out of the valve body.

The OS&Y globe valve’s unique feature is that its stem sticks out of the valve when the body is open. The stem serves as visual assistance to determine if the valve is closed or open.

Turning the valve’s handle will raise the stem, lift the disc and open the valve allowing water to flow.

When turned clockwise, the stem will lower into the valve body, closing the disc and stopping any fluid flow.

The functionality of the stem is the primary reason why OS&Y valves are required: (1) Any water mains feeding sprinkler heads. (2) Domestic water mains.

A few key points:

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• Both valves must have the UL listing.
• The OS&Y valve must be locked in an open position to enhance fire safety.