Guide to Technical Specs of Screwed Stainless Steel Gate Valve 200PSI CF8M Body NPT End

Screwed Stainless Steel Gate Valve
You need a valve that works for hard jobs. The screwed stainless steel gate valve is good for this. It has a CF8M stainless steel body and NPT end. It can handle 200 PSI of pressure. This valve works with water, oil, gas, and harsh chemicals. It can be used in many temperatures. STV makes this valve to be strong and easy to use. You can count on it to work well and last a long time.
Key Takeaways
- Screwed stainless steel gate valves are strong and last long. They can handle up to 200 PSI. This makes them good for high-pressure jobs.
- These valves have a CF8M stainless steel body that resists rust. This helps them work well for a long time in tough places.
- The NPT threaded ends make them easy to put in. They also help the valve fit tightly in many pipe systems.
- You should check for leaks and use the valve every month. Doing this helps the valve work well and last longer.
- Pick the right valve size and type for your system. Think about the pressure, temperature, and what flows inside. This keeps things safe and working well.
What Is a Stainless Steel Gate Valve?
A stainless steel gate valve lets you control liquid or gas flow. You use it to start or stop flow in a pipe. The gate inside moves up or down. When you open the valve, the gate goes up. This lets fluid move through easily. The design gives a clear path for flow. There is almost no resistance when it is open. This means water, oil, gas, or chemicals move strong and steady. People use this valve when they need flow all on or all off. It is not for slowing flow down.
Key Features
You want a valve that can handle hard work and last long. Stainless steel gate valves have many good features. These features make them popular in many jobs. Here is what makes them special:
| Feature/Advantage | Description |
|---|---|
| Minimal Flow Resistance | Lets fluid move easily when open, good for lots of liquid. |
| Full-Flow Design | Made to be fully open or closed, great for on/off use. |
| Corrosion Resistance | Does not rust easily, works well in tough places. |
| Durability | Built strong for high pressure and heat. |
| Low Maintenance | Needs less care because it resists rust, so it lasts longer. |
| Best for On/Off Control | Works best for big flow, better than ball or butterfly valves. |
| Superior Durability and Resistance | Lasts longer and resists rust better than other valves. |
Tip: The stainless steel gate valve from STV Valve Technology Group Co., Ltd gives you these benefits with high quality and a competitive price.
Typical Uses
You can use a stainless steel gate valve in many fields. It is good where you need strong flow and no rust. Here are some common ways people use it:
| Industry | Use Case |
|---|---|
| Oil & Gas | Controls oil and gas flow in pipes. |
| Water Treatment | Manages clean water, dirty water, and salt water. |
| Chemical Processing | Handles strong acids, bases, and solvents. |
| Food & Beverage | Moves ingredients safely and keeps things clean. |
| Pharmaceuticals | Keeps drug making areas clean and safe. |
| Marine | Fights rust from saltwater on ships and platforms. |
Stainless steel gate valves work well in tough places. They help keep your systems safe and running well. You can use them for oil, water, chemicals, or food.
Specifications
If you pick a stainless steel gate valve, you want to know what it does. STV Valve Technology Group Co., Ltd makes these valves strong and sells them at a good price. You get a valve that meets tough rules and works in many places.
Pressure Rating: 200 PSI
You need a valve that can take high pressure. This stainless steel gate valve is made for 200 PSI. It works safely with water, oil, gas, steam, and acids. Each valve is tested one by one to make sure it is safe. You can trust it for hard jobs in your system.
| Specification | Details |
|---|---|
| Maximum Pressure | 200 PSI |
| Hydrostatic Test | 300 PSI |
| CWP | 200 PSI, non-shock |
| Suitable Media | Water, Oil, Gas, Steam, Acid |
| Testing | 100% individually tested |
Note: The 200 PSI rating helps you feel sure in tough jobs.
Material: CF8M Stainless Steel
The valve body is made from CF8M stainless steel. This is also called SS 316. It does not rust or corrode, even in harsh places like chemical plants or near the sea. You get a valve that lasts longer and keeps working well.
| Property | Value |
|---|---|
| Material | 316 stainless steel (CF8M) |
| Corrosion Resistance | Great in acids, chlorides, and seawater |
| Pitting Resistance | High (PREN 23–25) |
| Non-magnetic | Yes |
| Melting Range | 1370–1400 °C |
| Density | 7.98 g/cm³ |
| Thermal Conductivity (100°C) | 16 W/m·K |
- It stands up to stress corrosion cracking.
- It works very well in places with lots of chloride or acid.
End Connection: NPT Thread
You want the valve to be easy to put in and safe. This valve has NPT threaded ends that follow ANSI B1.20.1 rules. NPT threads are simple to connect and seal. You can use them in small spaces and tight pipe systems. STV also has BSP and BSPT thread choices for other places or needs.
| Type of Connection | Description | Applications |
|---|---|---|
| NPT Threaded | Easy to put in and fix | Small spaces, US and North America |
| BSPT Threaded | Tapered, used in UK, EU, Asia | General jobs |
| BSPP Threaded | Parallel, needs gasket/O-ring | Food and clean systems |

Tip: NPT threads give a tight seal and make setup quick.
Design: Screwed, Non-Rising Stem
This stainless steel gate valve uses a screwed, non-rising stem. The stem turns to open or close the gate but does not move up or down. This saves space, which is good for low ceilings or tight spots. The handwheel is easy to use. Turn left to open and right to close.
| Feature | Details |
|---|---|
| Stem Type | Non-rising stem |
| Space Efficiency | Good for small spaces |
| Disc | Solid wedge |
| Operation | Handwheel, easy turning |
- The stem stays in place, so you do not need extra room above.
- You get smooth use every time.
More Technical Details
You want a valve that fits your pipes. STV has sizes from 1/2″ to 4″, so you can pick what you need. The valve works in temperatures from -20°C to 180°C (-4°F to 356°F). You can use it with hot or cold liquids. PTFE seals inside the valve stop leaks and handle strong chemicals. You do not need to fix it often. The design is made so you do not have to do much work on it.
| Specification | Details |
|---|---|
| Size Range | 1/2″ to 4″ |
| Temperature Range | -20°C to 180°C |
| Seal Type | PTFE |
| Maintenance | Maintenance-free design |
| Manufacturer | STV Valve Technology Group Co., Ltd |
- PTFE seals work well with chemicals and heat.
- You can fix the valve while it is still in the pipe and change seats easily.
- The packing gland can be tightened without stopping your system.
Note: STV makes many valves and gives good service, so you get your valves on time and with help.
Stainless Steel Gate Valves: Options and Flexibility
You can pick from different thread types—NPT, BSPT, or BSPP—based on what you need. STV gives you choices for projects all over the world. The valve works in many jobs, like water treatment or oil and gas. You get a valve that fits your needs and keeps your work going well.
- Sizes: 1/2″ to 4″
- Thread options: NPT, BSPT, BSPP
- Maintenance-free features
- High-quality CF8M stainless steel body
Tip: Always check your system’s pressure and temperature before picking a valve size and thread type.
Advantages of Stainless Steel Gate Valves
Corrosion Resistance
You want a valve that does not get damaged easily. Stainless steel gate valves protect against rust and chemical harm. The CF8M stainless steel body makes a fast shield to stop corrosion. This works even with saltwater or acids. Nickel and molybdenum in the steel help block damage from chlorides. You can use this valve in marine or chemical places. It has strong corrosion resistance. You can use it with water, oil, gas, and harsh chemicals. You do not have to worry about it getting ruined.
- Stainless steel valves make a layer that stops rust.
- You can use them where there are strong chemicals or salty water.
- The material keeps working well in hard places.
Durability and Maintenance
You need tools that last a long time. Stainless steel gate valves can work for 10 to 15 years in normal water systems. In clean places, they can last over 25 years. The strong steel body and PTFE seals help stop damage. You do not need to fix or change parts often. The valve’s design lets you do maintenance without stopping your system. This saves money and keeps things running.
- The valve does not rust, so you fix it less.
- Strong parts make it less likely to break.
- You save money because you do not replace it much.
Application Flexibility
You can use stainless steel gate valves for many jobs. The valve works with water, crude oil, refined petroleum, natural gas, LPG, and mild chemicals. This means you can use one valve for different systems. You get good results in oil and gas, water treatment, or chemical plants. The valve fits many pipe sizes and thread types. You can pick what you need.
| Media Type |
|---|
| Water |
| Crude Oil |
| Refined Petroleum |
| Natural Gas (sweet) |
| LPG |
| Mild Chemicals |
Tip: Pick a valve that resists corrosion and lasts long. This helps you save money and keeps your system safe.
Selection and Installation

Compatibility
You need to check if the valve fits your pipes. Stainless steel gate valves work with many pipe types. They are used in lots of jobs and places. The table below shows where these valves work best:
| Material | Corrosion Resistance | Temperature Range | Applications |
|---|---|---|---|
| Stainless Steel | Excellent | Wide Range | Chemical processing, food and beverage, pharmaceutical industries |
These valves are good where you need strong rust protection. They also work in hot or cold places. STV Valve Technology Group Co., Ltd makes strong valves for many systems.
Sizing and Checklist
Picking the right size helps the valve work well. Here are steps to choose your stainless steel gate valve:
- Match the pipe size. The valve should be the same size as your pipe.
- Check how fast the liquid moves. Use the right math to find flow and pressure loss.
- Make sure the valve can take the pressure in your system.
Tip: Always check what your system needs before buying a valve.
Installation Tips
Putting the valve in the right way helps it last longer. Here are some tips to help you:
- Keep the gate valve a little open when you put it in. This keeps the seal safe.
- Look at the valve every three months for leaks or rust.
- Open and close the valve all the way once a month. This stops it from getting stuck.
- Check the valve once a year. Change gaskets if they look worn out.
- Use good parts and follow the right steps to stop leaks and pressure issues.
Checking your valve often and putting it in right keeps your system working well.
Safety
You need to follow safety rules to keep people and things safe. The table below lists important safety steps:
| Safety Precaution | Description |
|---|---|
| Valve Installation Angle | Keep the angle between the valve and pipe under 30°. |
| Valve Stem Orientation | On sideways pipes, put the valve straight up or on top. |
| Central Installation | Put valves in the middle so you can reach them, especially if high up. |
| Flow Direction | Put the valve so the flow goes the same way as the arrow. |
| High-Pressure Valve Review | Check papers and test results before putting in high-pressure valves. |
| Tightening Procedures | Tighten bolts in a crisscross way to stop damage. |
| PPE and Safety Measures | Wear gloves and eye gear. Follow lockout/tagout rules. |
Always let out pressure before fixing the valve. Wear safety gear and follow all safety steps each time.
Comparing Stainless Steel Gate Valves
Flanged vs. Screwed
When you pick a stainless steel gate valve, you must choose between flanged and screwed types. Each one has its own good points. Flanged valves use gaskets and bolts to join pipes. Screwed valves have threads at the ends to connect. The table below shows how they are different:
| Feature | Flanged Valves | Screwed Valves |
|---|---|---|
| Connection Method | Flange connections with gaskets and fasteners | Threaded connections |
| Pressure Handling | Suitable for high-pressure systems | Suitable for low to medium-pressure applications |
| Temperature Handling | Designed for high-temperature conditions | Not suitable for high temperatures |
| Applications | Used in oil and gas, chemical processing, and heavy industries | Used in residential, commercial, and small industrial setups |
| Reliability | More reliable due to larger sealing surface area | Less reliable; dependent on thread quality |
| Installation Cost | Generally higher due to complexity | Lower installation cost due to simplicity |
Flanged valves are best for big jobs and high pressure. Screwed valves are good for smaller jobs and cost less to put in.
Tip: Screwed stainless steel gate valves from STV Valve Technology Group Co., Ltd are easy to install and work well for many uses.
CF8M vs. Other Grades
CF8M stainless steel is great if you need strong protection from rust. It has more chromium and molybdenum than other types. This helps it fight off damage from chemicals and salty water. CF8M does not get pitting or crevice corrosion as easily as CF8. The table below shows how they compare:
| Feature | CF8M | CF8 |
|---|---|---|
| Molybdenum Content | 2-3% | Not present |
| Pitting Corrosion Resistance | Significantly improved | Lower resistance |
| Crevice Corrosion Resistance | Better resistance | Lower resistance |
| Resistance to Acids | Performs much better | Lower performance |
CF8M stays strong and tough even when it is cold. It works well for heavy jobs and keeps its shape under stress. CF8M also does better than 316 stainless steel in places with lots of chloride.
- Stays strong and tough in cold places.
- Good for heavy-duty jobs.
- Great at fighting rust in salty areas.
When to Choose 200 PSI NPT
Pick a 200 PSI NPT stainless steel gate valve if you need a strong valve for medium pressure. NPT threads make it fast and easy to put in. This type is best for water, oil, and gas pipes in buildings and factories. You get a tight seal and it is easy to take care of. If you want a valve that lasts and can handle hard work, the 200 PSI NPT is a smart pick.
Note: STV Valve Technology Group Co., Ltd gives you strong 200 PSI NPT gate valves with CF8M bodies for many jobs.
You can count on a screwed stainless steel gate valve to work well. The CF8M body and NPT end let it handle many fluids and pressures. Here are the main benefits:
| Feature | Details |
|---|---|
| Material | 316 stainless steel |
| Pressure | 200 PSI |
| Connection | NPT/BSP/BSPT |
| Media | Water, oil, gas, chemicals |
Make sure the valve matches your system before using it. Use this checklist to help:
| Criteria | What to Check |
|---|---|
| Media Type | Fluid or gas type |
| Pressure | System pressure |
| Temperature | Operating range |
| Connection Type | NPT, BSP, or BSPT |
If your job is tricky, ask a technical expert or look at product guides. STV Valve Technology Group Co., Ltd gives you good valves and service all over the world.
FAQ

What does 200 PSI mean for this gate valve?
200 PSI means the valve can safely handle up to 200 pounds per square inch of pressure. You can use it in many medium-pressure systems without worry.
Can you use this valve with chemicals?
Yes, you can use this valve with many chemicals. The CF8M stainless steel body and PTFE seals resist corrosion from acids and other harsh fluids.
What sizes are available for the screwed stainless steel gate valve?
You can choose sizes from 1/2 inch to 4 inches. This range lets you match the valve to your pipe system easily.
How do you install an NPT end gate valve?
You screw the valve onto the pipe using the NPT threads. Always use thread sealant for a tight, leak-free fit.
Who makes these stainless steel gate valves?
STV Valve Technology Group Co., Ltd makes these valves. You get high quality and a good price from a trusted manufacturer in China.
