Your One Trusted Source of OS&Y Gate Valve

Reliable OS&Y Gate Valve to Delight Your Customer

As an expert of the rising stem gate valve manufacturer, Kinvalve always focuses on the safe shutoff of the gate valves. At Kinvalve, You can see the integrally forged stems, but welding is not allowed.

This forged stem improves hardness and toughness, improves wear resistance, avoids contamination of your application media, and extends the service life of OS & Y gate valves.

In a typical Kinvalve OS&Y gate valve, you can see that the stem and the plate have a high strength T-joint.

The diameter of the valve stem is equal to or even exceeds the relevant standard, which ensures the connection strength.

For safe use and long lifespan, the stem in a Kinvalve OS&Y gate valve is quenched and tempered, and its surface is treated by nitriding treatment, offering good corrosion resistance and friction resistance.

At Kinvalve, OS&Y gate valves are available in carbon steel and stainless steel. And all of our rising stem gate valves are metal seat gate valves. For carbon steel rising stem gate valve, the seat is usually forged steel.

As a unique rising stem gate valve manufacturer, Kinvalve can customize the valve seat with a hard alloy spray welding sealing surface for you.

You can customize your OS&Y gate valves with a renewable threaded seat in the rising gate valve that is smaller than 10 inches.

For stainless steel rising stem gate valves, you can choose the integral seat, which is made of the same material as the valve body. You can also choose a special hard alloy welding coating to meet your different needs.

Although the rising stem gate valve is used as the reliable isolate valve, a rising gate valve with poor design, neither a flanged gate valve nor threaded gate valve, cannot be satisfied with your reliable isolating service.

As a rising stem gate valve manufacturer with over 18 years of experience, Kinvalve always commits to designing and manufacturing qualified gate valves to serve customers from all over the world.

At Kinvalve, we always provide backseat design for your rising stem gate valves. The backseat provides a reliable seal when the gate valve is fully open to prevent leakage of media from the bonnet.

In most cases, the carbon steel OS&Y Gate Valve is equipped with renewable backseats instead of integral ones.

In the case of the stainless steel rising stem gate valve, the integrated backseat is prepared for you. This kind of backseat will be machined directly in the bonnet or is machined after welding.

For a reliable seal between the stem and the bonnet, Kinvalve always pays more attention to the packing seal in the OS&Y gate valve with its rigorous and serious attitude.

In the case of the os&y gate valve, We usually recommend that you use molded flexible graphite as the packing seal material. Of course, you can also choose PTFE or its reinforcement and combination materials.

The internal surface of the stuffing box requires excellent finishing too because this area is contacted with the packing materials.

The finely finished surface makes the rising stem gate valve excel in the reliable sealing tight.

As for the shaft part in contact with the stuffing box material, we, as a manufacturer constantly pursuing the design and manufacture of high-quality OS & Y gate valves, will certainly handle them properly.

Generally, you can see that the shaft is rolled and pressed after precision machining, so as to ensure its high finish and compactness, and avoid impurities or burrs damaging the sealing of the packing.

All this prudence makes Kinvalve be trusted as a focused rising stem gate valve manufacturer.

Compared to the NRS gate valve, Kinvalve OS&Y gate valve’s external bonnet allows a better sealing solution whilst the packing gland is easily accessible for your maintenance.

And furthermore, rising gate valves require lower operating torques, which brings technical and economical benefits to save your cost.

Kinvalve’s OS&Y gate valve and NRS gate valve are usually available in hand wheel and gearbox operation. According to your custom requirements, chain wheels and compact wheels are also optional.

Outside stem and yoke gate valve and NRS gate valve are our star products. Kinvalve has been focusing on the manufacturing of OS&Y gate valve and NRS gate valve for almost two decades.

Therefore, a huge amount of experience has been accumulated and the manufacturing processes have also been significantly improved over the years.

We believe that Kinvalve can satisfy any of your applications with our optional OS&Y gate valves and nonrising stem gate valves.

The only thing you need to do is to send your specific requirements to us now!

OS & Y Gate Valve: The Ultimate FAQ Guide

If you have any question about OS & Y gate valve, you will find the answer right here.

Whether you want to learn about the components, working principle, features, specifications, benefits of quality standards – all information is here.

Keep reading to learn more.

What Is OS & Y Gate Valve?

OS &Y gate valve means “outside stem and yoke” or “outside screw and yoke”.

It is a type of gate valve which is used mainly to control the flow of water to fire sprinkler systems.

This gate valve operates by opening and closing through a gate that can rise out of and lower into the valve.

OS & Y valve

What Are The Main Parts Of OS & Y Gate Valve?

The main parts of OS & Y gate valve include:

Body

It is connected to the equipment or piping using connections like welded, flanged, or screwed.

It is the main part that retains pressure and accommodated the valve trim, and it simply sandwiches between two pipe flanges referred to as wafer ends.

It has different types of passage through which the fluid passes, and this depends on the valve’s function.

The first type of body is reduced bore which has a smaller passage diameter of the valve as compared to the connecting pipe.

The second type is a full bore and in this, the valve’s passage diameter is like that of the connecting pipe.

It is commonly used when pigging is required in the OS & Y valve for cleaning and inspection purposes,

Bonnet

It contains the moving parts in the OS & Y gate valve which are connected to its body by use of bolts.

It is used to cover the body of the OSD & Y gate valve and is available in several designs.

Bonnets can be connected to the body using several connecting ways such as threading, bolting, and welding.

Valve

It is an internal part of the OS & Y gate valve which is removable and replaceable.

The main components of the valve include body, stem, bonnet, York, seat, packings, backseat, actuator, sleeves, and bolt disk or wedge

Valve Trim

It refers to all the internal parts which meet the fluid, and these include the stem, gate, wedge, and seat rings.

The components of the valve trim will always change depending on the type of valve.

The valve-specific trim includes elements such as backseat, spacers, guides, glands, bushings, internal springs, and retaining pins.

Disk

It is a part of the OS & Y gate valve which stops the fluid flow or allows throttles depending on the position it is in.

Seat

It offers the seating surface for the disk in the OS & Y gate valve.

OS & Y gate valve can have multiple seats, but it mostly has two seats; one on the upstream side and the other downstream.

It is important to have a seat of a fine surface finish to ensure proper sealing in the OS & Y gate valve.

Back Seat

It is made up of a mating surface on the bonnet’s underside and a shoulder on the stem of the OS & Y gate valve.

It can form a seal when the stem is fully open in a way that prevents leakage to the packing chamber and the environment.

It also makes it possible to replace the gland packing during servicing of the valve.

Stem

It connects the disk of OS & Y gate valve to the actuator making it possible to move and position the valve disk.

It can connect on one end the disc and on the other end the handwheel, actuator, or the valve’s lever.

They are made from stainless steel and their connection onto the disk of the OS & Y gate valve is either threaded or welded joints.

How Does OS & Y Gate Valve Operate?

The OS & Y gate valve is operated by opening and closing the gate to lower and raise the valve. Raising the gate of the OS &Y valve makes it possible for water to flow through it while lowering the valve cuts off the water flowing through the valve.

When the OS & Y gate valve is fully open, there will be no obstruction in the path of flow thus resulting in very low loss through friction.

On an OS & Y gate valve, its valve is fixed to a stem that is threaded with a handle that connects it to the yoke.

As the operators of the OS & Y gate valve rotate the handle anticlockwise, the stem will be lifted out of the handle thus opening the valve.

When the stem of the OS & Y gate valve is no longer protruding beyond the handle, it will be closed.

Which Distinct Feature Does OS & Y Gate Valve Have?

Some of the distinct features of OS & Y gate valve include:

• It is among the lightest and most durable gate valves.
• Has a ductile iron wedge that is fully encapsulated to achieve bubble-tight sealing.
• It has a spherical shape which enables the valve to endure uniform force without the possibility of deformation.
• A jacket type of stem eliminates the possibility of accidents.
• Has a rolling bearing between the nut and yoke to offer little torque following the pressure rating specification.
• Possesses a backseat design that conforms to API600.
• The seal of OS & Y gate valve can be overlaid using a hard sealing material and welded onto its body for various applications.
• The wide seal face of the wedge offers wearing allowance and longer service life.
  The wedge is also flexible in a way that it can adapt to body deformation.
• Wedge is vulcanized fully with EPDM rubber and equipped with wedge shoes which ensure smooth operation.

OS& Y gate valve

• Full bore
• There is a large conical stem hole in the wedge which eliminates stagnant water.
• The guide rails for the wedge and body ensure that OS & Y gate valve operates smoothly.
• Low operating torque.

What Materials Are Used To Make OS & Y Gate Valves?

Different parts of OS & Y gate valve are made using different types of material and these include:

• EPDM coated ductile: used to make the wedge
• Stainless steel AISI 420: used to make the stem pin, stem, and compression washer
• Cold forged copper alloy: it is used to manufacture the wedge nut
• EPDM 70: for production of sealing gasket
• NBR: used to make sealing O rings and stem O rings
• Copper alloy: used to make the stem guide, fixing washers and top nut
• FBP coated ductile iron: it is used to make the top gland, hand wheel, yoke, bonnet casting, and body casting.
• Zinc coated mild steel: it is used to make the gland stud, gland nut, and gland washers.
• Activated resin: used to make the screw grouting.
• Black oxide finished carbon steel: used in making bonnet screws.

How Much OS&Y Gate Valve Cost?

The price of OS & Y gate valve tends to vary because of the different features used to ascertain it.

Some of the factors which determine the price of OS & Y gate valve include:

• Size of the OS & Y gate valve
• Pressure rating
• Temperature rating
• The connection type of the body of OS & Y gate valve
• Materials used in making the various parts of the OS & Y gate valve.

What Are The Benefits Of Using OS & Y Gate Valves?

Some of the benefits of using OS & Y gate valve include:

• The drop in pressure during the operation of the OS & Y gate valve is very minimal.
• OS & Y gate valve can be used as bi-directional.
• It is suitable for use in applications of high pressure and temperature.
• OS & Y gate valve is very efficient as it requires less maintenance.

What Are The Available Types Of OS & Y Gate Valve?

Some of the available types of OS & Y gate valve include:

• Flanged OS & Y gate valve: it has a connection that is flanged and meets BS EN quality standards.
• Grooved OS & Y gate valve: it has grooved connections according to ISO standards.
• Flanged and grooved OS & Y gate valve: its connection is flanged according to BS EN 1092-2 plus grooved according to ISO 6182 standards.
• OS & Y gate valve with supervisory switch: it has a flanged connection according to standards by BS EN and has a supervisory switch.

How Does OS & Y Gate Valve Compare To Bolted Bonnet Gate Valve?

Some of the comparisons between OS & Y gate valve and bolted bonnet gate valve include:

• OS &Y gate valve means “outside stem and yoke” or “outside screw and yoke” and it is mainly to control the flow of water to fire sprinkler systems.
  Bolted bonnet gate valve on the other hand is used mainly in transmission pipelines and reinjection, compression, and pumping units.
• The bolted bonnet gate valve has a working pressure of 500 psi while the working pressure of OS & Y gate valve is 16/300 psi.
• OS & Y gate vale has a working temperature rating ranging between 0 to 100 degrees Celsius.
  The temperature rating for bolted bonnet gate valve on the other hand ranges between -29 to 200 degrees Celsius.

bolted bonnet gate valve

What Quality Standards Should OS & Y Gate Valve Adhere To?

Some of the quality standards that OS & Y gate valve should adhere to include:

• AWWA C508
• FM 1120/1130
• UL 262
• ANSI B16.10
• EN 1092-2
• ISO 7005-2
• PN 10/16
• BS 5163
• AWWA 5163
• ASME B16.1
• ISO 6182

What Are The Available Size Ranges Of OS & Y Gate Valve?

OS & Y gate valve is available in sizes ranging between 2 inches to 100 inches.

It is good to ascertain the appropriate size that you need so the manufacturers can customize it to suit your specifications.

At Which Pressure Should OS & Y Gate Valve Operate?

OS & Y gate valve should operate at a pressure of 16/300 psi.

What Types Of Disks Does OS & Y Gate Valve Have?

Some of the types of disks in OS & Y gate valve include:

• Solid wedge gate valve: it is very simple and strong thus widely used in OS & Y gate valves.

  An OS & Y gate valve with a solid wedge can be installed in any position.

solid wedge gate valve

• A flexible wedge; is a solid disk that contains a cut that varies in size, depth, and shape near the perimeter for retaining strength and flexibility.

  It improves the alignment of the seat of the OS & Y gate valve and ensures better tightness to prevent leaks.

flexible wedge gate valve

• Split wedge disk: it is made up of two solid pieces that hold together using the assistance of a special mechanism.

  They are always intact and ensure that the OS 7 gate valve has seats that are always intact and bi-directional sealing.

split wedge gate valve

Which Elements Do You Use In The Operation Of OS &Y Gate Valve?

Some of the elements which are used in the operation of OS & Y gate valve include:

Actuator

It enables movement of the OS & Y gate valve by either opening or closing it.

Besides, it produces rotary and linear motion to make the process of opening and closing the OS & Y valve efficient.

It is mainly suitable for the operation of the OS & Y gate valve in the following situations:

• Where the OS & Y gate valve is of large dimension and operates at high pressure.
• The OS & Y gate valves require to be controlled from a specified remote location.
• The nature of the OS & Y gate valve needs a very fast process for opening and closing it.

Some of the types of actuators which can be used in OS & Y gate valve include:

• Gear actuators
• Hydraulic actuators
• Electric actuators
• Pneumatic actuators
• Solenoid actuators
• Gas over oil actuators

Handwheel

It can be used to rotated clockwise or anticlockwise to either open or close the OS & Y gate valve.

When the handwheel is rotated anticlockwise, the stem will be lifted out of the handle thus opening the valve.

When the stem of the OS & Y gate valve is no longer protruding beyond the handwheel, it will be closed.

Where Is OS & Y Gate Valve Used?

OS & Y gate valve is used on all water lines which offer fire protection.

This means that any combined water line for domestic and sprinkler in one pipe and any dedicated sprinkler line need an OS & Y valve.

All domestic lines of water which measure 3 inches or larger also require installation of OS & Y valve.

What Are The Connection Types Of OS & Y Gate Valve?

Some of the connection types that are used in OS & Y gate valve include:

• Flanged connection: it needs the right number of nuts and stud bolts for easier connection of the parts.
  It is suitable for OS & Y valves of larger diameter, and it makes sure that the joints are strong and durable.
• Threaded connection: it connects the OS & Y gate valve to the pipe using a thread that is tapered and is mostly used in low-pressure environments.
  It is also used in OS & Y gate vales which are not subjected to mechanical forces like vibrations and elongation.
• Socket weld connection: it is relatively expensive as compared to flanged connections because it needs more work in setting up.
  It is very reliable and less prone to leakages in the long run.
• Welded connection: it is quite costly but ensures that there are no leakages in the OS & Y gate valve.
• Hub end connection
• Screwed connection
• Buttweld connection: it is used for the application of high pressure which has larger diameters.
  This connection needs full welding of its ends in the two parts which are to be joined.

What Do You Use To Seal Connections Between The Bonnet Of OS & Y Gate Valve And It’s Body?

A backseat refers to seating inside the bonnet which is used in sealing the connection between the OS & Y gate valve and its body to eliminate leaks.

It ensures that the pressure in the OS & Y gate valve does not build against the valve packing as soon as it is fully open.

Which Is The Recommended Working Temperature Of OS & Y Gate Valve?

OS & Y gate vale should have a working temperature ranging between 0 to 100 degrees Celsius to ensure their efficiency in operation.

How Should You Maintain OS & Y Gate Valves?

Maintenance of OS & Y gate vale is very important as it will ensure that it serves the intended function well and eliminates the possibility of leakages.

You should follow the manual which accompanies the OS & Y gate valve and make sure you stick to it.

It is important to operate the OS & Y gate valve under the pressure rate of 16.300 psi which is specified to ensure efficiency.

In addition, always use the OS & Y gate valve within the specified temperature rating to avoid overheating the system and causing leaks.

It is important to follow the inspection instructions which are specified in the manual regularly to ascertain those systems are working well.

Occasionally, you should disassemble the parts of the OS & Y gate vale and do a thorough cleaning following the instructions stated in the manual.

Are There Limitations Of OS & Y Gate Valve?

Some of the cons of using OS & Y gate valve include:

• It is relatively slower in operation as the opening and closing processes take a bit of time.
• In the OS and Y gate valve, it is difficult to access parts like the lapping and grinding of seats thus challenging to maintain some of its parts.
• When OS & Y gate valve is partially open, it may result in some noise.

How Does Stem Of OS & Y Gate Valve React When You Open And Close It?

You can tell if the OS & Y gate valve is open or closed by checking the position of its stem.

When you open the OS & Y gate valve, the stem will protrude beyond the handle while when you close it; the stem will no longer be protruding.

How Do You Know If OS & Y Gate Valve Is In Closed Position?

You will know that the OS & Y gate valve is in a closed position once you have rotated it in a clockwise position and the stem is not protruding.

A clockwise rotation of the OS & Y gate valve can move the stem back into the gate and ensure it closes well.

What Is The Plumbing Code For OS & Y Gate Valve?

The plumbing code for OS & Y gate valve includes:

• All the main control valves for the system of fire protection must be OS & Y type of gate valves.
• The OS & Y gate valve must be in a size like that of the water service line.
  It is recommended that the size of the OS & Y gate valve must never be smaller or larger than that of the water service line.
• You should always ensure that the OS & Y gate valve is locked in the open position as this affirms that fire protection is active.
• All OS & Y gate valves must be listed by Underwriter Laboratories (UL). This is an independent global science company.

What Is The Function Of Packing Nut On OS & Y Gate Valve?

The function of the packing nut on the OS & Y gate valve is to hold the packing materials of the OS & Y gate valve securely in place to eliminate leaks.

At times, packing nuts in the OS & Y gate valve may be too loose or too tight.

In case the handle of the OS & Y gate valve does not move, its packing nut might be too tight.

In this case, ensure you do not use force to make it move but you should just loosen the packing nut in several turns.

Once you have done this, the handle of the OS & Y valve will move with ease.

In addition, remember to make the packing nut tight once through with the procedure.

If there are frequent leaks in the OS & Y gate valve, it means that the packing nut is loose.

You should solve this by tightening it to eliminate the leak.

With the information in this guide, you can choose a perfect OS & Y gate valve that meet the specific needs of your application.

At Kinvalve, we will help you get a perfect OS & Y gate valve for your unique applications – contact us now.