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Blog posts : "valves"

Needle Valves: Uses, Types, Industries

Needle valves are now familiar to you. Let's have a quick look at the amazing points and highlights regarding needle valves. 

Uses of Needle Valves

Due to the proper structure that helps out engineers and others while their work, these are the following uses of needle valves. 

  1. Needle valves are consumed in flow-metering equipment or tools, primarily when a constant, calibrated, low flow velocity must be conserved for some period.
  2. Needle valves are operated in low-pressure hydraulic operations, chemical processing, and different gas and liquid customs.
  3. Needle valves are utilized to control the cycle and safeguard small measures from the destruction resulting from immediate pressure explosions of liquids and gases.
  4. Heretofore flow rates are low and several rolls of the valve body are needed to unpack or tighten, needle valves are not adopted for modest shutoff devices.
  5. Needle valves are also periodically obtained in space operations, to disclose an answerable yet smooth allotment of gas without a considerable amount of pressure.

Types of Needle Valves 

Needle Valves come in two different types and each has different features. They are

1. Inline Needle Valve

The inline needle valves have their separate inlet and outlet port. It is also in a straight line. These valves can be enrolled, mainly, in an upright line flow operation.

2. Angle Needle Valve

The Angel Needle valves have their separate inlet and outlet port. It is at a certain angle. Mostly, a 90° angle is incorporated between the inlet and outlet for adequate operation incorporation. This kind of needle valve is obtained at the place where the pipe corners.

Industries that acquire Needle Valves 

Needle valves are obtained in various industries such as: 


1. Zoological sciences

The Needle Valve is very helpful when you are studying zoology as the zoological sciences is a book that is based on mostly animals.


2. Gas and liquid dispensation

The Needle Valve is used in gas and liquid dispensation to control the major flow system of these fluids and gases. It also helps while discharging these fluids. 


3. Instrumentation control

It helps in controlling the instrumentation as it can control the flow at a very low rate and in return furnishes you with higher accuracy. It helps you to have control over the instrumentation and its operation handily. 


4. Cooling

The needle valve helps in cooling your heated up fluids and gases while its passage as throttle even with less volume of fluid and gases is feasible. It is also a simple process of fitting and using a needle valve for cooling. 


5. Power generation

The needle valve helps in the regulation of air and helps in the turbine bypass that helps in the power generation. It also makes the flow of your liquids more precise and reliable. 


At last, we hope you get a needle valve from the best manufacturer and supplier of valves and other required material and that is Techtube. Order your needle valve now and have a stunning experience while using it. 



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***Monel, Hastelloy, Inconel, Incoloy, SMO254, Nitronic, AL6XN, Stellite, Sanicro, Tantalum, Nimonic , Alloy A286, Invar, Cupronickel etc., are the trademarks of their respective companies. 


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What are High-Pressure Needle Valves?

High-pressure valves are used in industries ranging from global oil production to the aerospace industry. It is present in almost all hydraulic systems to safely keep the system pressure below the desired upper limit. In general, there are five types of high-pressure valves. 

High-pressure needle valves have their specialty and features based on their usage and functioning. This makes the user clear of the problem of the needle valves regarding pressure and temperature. Let's start the discussion and gain some insights regarding high-pressure needle valves. 

About High-Pressure needle valves 

As the name suggests, a high-pressure needle valve is the design of a needle valve for controlling high temperature and high pressure. Needle valves are commonly used to control clean gases and liquids.

High- pressure Needle valve manufacturers have designed this valve from two body materials: one is brass and the other is stainless steel. Brass High-pressure needle valves are used in potable water applications, other non-chemically reactive liquids, and non-corrosive liquids. 

When this valve is used for high-pressure fluids, manufacturers use stainless steel because it is the best material for corrosive liquids and high-pressure gases. The durability of this material is long, and it also withstands high temperatures.

Features of High-pressure needle valves

There are various special features of high-pressure needle valves. They are: 

  • Low-wear design since the spindle head does not rotate in the housing 
  • Low torque and smooth  valve handle the operation even at high pressure 
  • Leakage tested according to BS6755 / ISO 5208 leak rate A 
  • A wide selection of materials and configurations is available 
  • Customer-specific combination of valve and measuring instrument (instrumentation connection) on request. 

Applications of high-pressure needle valves 

These high-pressure valves are primarily used to regulate the pressure high-pressure of the circuit and are typically used to offset weight or external forces. The valve's main port is connected to the rod end of the cylinder and the pressure setting is slightly higher than necessary to prevent free fall of the load. These are the following applications of high-pressure needle valves. 

  1. Petroleum, chemical industry, machine building, and automation. 
  2. For injection system, test bench, hydraulic unit, discharge protection.  
  3. Wet sandblasting/cutting, high-pressure cleaning. 


Techtube is one of the largest manufacturers and suppliers of equipment and tools which enables an individual to have control on the fluids or gases. 

You can also gather an experience of this just by ordering the best quality material for your work from this website. Have good control at high pressure by utilizing high-pressure needle valves!!



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***Monel, Hastelloy, Inconel, Incoloy, SMO254, Nitronic, AL6XN, Stellite, Sanicro, Tantalum, Nimonic , Alloy A286, Invar, Cupronickel etc., are the trademarks of their respective companies. 


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Functions of a Needle Valve How to maintain a Needle Valve?

When you are an engineer, you desire to have a hard time building your project. It is always a principle of engineers to use quality raw materials in their construction. The most used needle valve is also required. Let's have a glance at the functions and maintenance of your needle valve. 

What is a Needle Valve? 

A needle valve is tried to accurately regulate flow costs of neat gasses or liquids. The adjustments are incremental and steady for regulating the flow rate, still, they can also be obtained as a valid shut-off valve. A needle Valve is commonly only obtained for inferior flow costs and has a very substantial strength decline from the basin to the opening. They are also known as plunger valves. 

Functions of a Needle Valve 

The main function of the needle valves is controlling valves and helping engineers and the users of needle valves to properly control and organize water flow and pressure. 

How to maintain a needle valve? 

Here are 3 tips for you on how to maintain a needle valve.

1. Clean the needle valve area 

Everything can be maintained to increase its lifespan. For that, simply you need to clean your needle valve on an annual basis. Avoid cleaning your needle valve monthly as it can also be destructive for the valve. By simply cleaning the needle valve on an annual basis, you can reduce the cost of repairs as a result the valve can be used beyond the specified period. 

2. Inspect your needle valve

What you need to do is have complete knowledge regarding your needle valve. For this, look in your needle valve carefully to ensure that no leakages or no damage are being done. Then, look for the material used and have a look that it has corrosion or rust on it. You need to check your valve at different temperatures and different pressures to avoid any kind of repairs or replacement. 

3. Lubricate your needle valve

This is the simplest, easiest, and most required method to maintain your needle valve, which is lubrication. As we all know that every part of the machines, gadgets, and equipment used in production needs to be lubricated with oil or grease. Lubrication will help in the smooth and fast processing of your needle valve. Lubrication also limits the wear of your needle valve. 

Lastly, wrapping up by guiding you to have a needle valve from the best manufacturer and supplier of valves and other required material Techtube. Book your needle valve now and have an amazing experience while using it.



For More Details on  Functions of a Needle Valve How to maintain a Needle Valve contact us on

***Monel, Hastelloy, Inconel, Incoloy, SMO254, Nitronic, AL6XN, Stellite, Sanicro, Tantalum, Nimonic , Alloy A286, Invar, Cupronickel etc., are the trademarks of their respective companies. 

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Needle Valves- How Are They Different From Flow Control

Needle Valves- How Are They Different From Flow Control

Needle valves are valves that have a narrow and tapering point at the end of the valve stem. This is the stem of the valve, which is lowered to block or restrict the flow.

The needle valve stem's delicate threading design, along with its huge seat area, ensures accurate resistance. These valves are used to control and check the flow of liquids and gases into the system's delicate gauges, which are vulnerable to harm if exposed to high pressure.

These valves are also seen in industrial machinery when the flow must be brought to a complete stop. They're also used in situations when a precise flow modification is required, or where a modest, regulated flow is required. These valves are versatile enough to be used as both on and off valves, as well as in a throttling system.

Difference between Needle Valves and Flow Control

Flow Controls and Needle Valves are used to slow actuator speed by reducing the rate of flow in a pneumatic circuit leg. Although both have the same basic function of flow restriction, the Needle Valve regulates flow in both directions (bi-directional) whereas the Flow Control Valve only regulates flow in one way (enabling free flow in the different direction).

A precisely threaded stem allows gradual adjustment of the amount of controlled flow passing through the valve in both the Flow Control and the Needle Valve. Flow enters the input port, passes through a tapered stem-sized aperture, and exits the output port. The Flow Control has a F2F by-pass check, which allows for rapid unrestricted flow from the valve.

There are two sorts of Flow Controls to consider, and their selection and location within a pneumatic circuit have a significant impact on an actuator's performance.

The flow to an actuator is restricted by a Meter-In Flow Control (also known as a Reverse Flow Control).

A Meter-Out valve, which regulates the exhaust flow from an actuator, is the most often utilized Flow Control.

It's critical to understand your flow rate requirements before choosing a Needle Valve or Flow Control for your pneumatic system. The related actuator's speed is determined by how rapidly it can be filled with air at the intake and expelled at the output.


Needle valves are used to ensure that the fluid travels through the valve and spins 90 degrees before passing through the seat orifice. A rod with a cone-shaped tip is included with this seat. The valves are used to control the flow of liquids and gases at low flow rates.


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***Monel, Hastelloy, Inconel, Incoloy, SMO254, Nitronic, AL6XN, Stellite, Sanicro, Tantalum, Nimonic , Alloy A286, Invar, Cupronickel etc., are the trademarks of their respective companies.











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How to choose a Needle Valve? | TechTubes


Are you using a needle valve or are you ready to get started? We've put together a needle valve guide in case you come across an unfamiliar term while working on a project. 

The guide describes what they are, how they work, and some of the different ways they are commonly used. Reviewing the summary expands on the function and How to choose Needle Valves.

What is a needle valve? 

Needle valve: Definition, type, function, and application: Needle valves, sometimes referred to as spool valves, are pressure and flow control valves that help accurately control the pressure and flow of fluid flowing through the pipeline. The adjustment or operation of the Needle Valve is so delicate that it allows for very precise control of fluid flow. These valves are commonly used for low flow applications and high pressure drops from inlet to outlet. 

However, it can also be used to block or block the flow of liquid in the pipeline. Its actuation mechanism is similar to that of a piston check valve, except that the size of the piston used for the Needle Valve is relatively thin. This figure shows different parts of a generalized needle valve. 

The function of the Needle valve

The needle valve opens and closes the passage (orifice) between the inlet and outlet by the movement of a tapered needle perpendicular to the direction of flow. The needle is directly connected to the plunger or shaft. The handle is further connected to the handle and uses the fine internal thread of the hood to convert rotary motion into reciprocating motion. 

When the handle is given a rotational movement, a subtle up-and-down movement of the piston occurs, which opens and closes the opening. A locknut is also attached to the top of the attachment to prevent the plunger from completely disengaging from the female thread of the attachment. As the needle moves down, it contacts the valve seat and provides a leak-free block of fluid in the pipeline. 

The attachment is connected to the valve body via a screw system.

Valve activation can be controlled manually or automatically by rotating the handle. Automatic needle valves are generally operated electrically or hydraulically. The motor or hydraulic actuator precisely controls the position of the stem in the valve body (bonnet) according to external requirements. 

Applications of Needle valve 

The most common use of needle valves is to regulate the flow and protect the fragile gauge from damage from sudden pressure surges of liquids and gases. Needle valves are ideal for systems that use low flow, lightweight, and low viscosity materials. Needle valves are typically used in low-pressure hydraulic systems, chemical treatments, and other gas and liquid applications. 

Another feature of the needle valve is that its material also allows it to be used in high temperature and oxygen applications. Needle valves are usually made of stainless steel, bronze, or metal alloys. It is imperative to choose a needle valve made of the right material for the service you need. In this way, the longer service life of the valve is guaranteed and the system can operate smoothly and safely. 

Selection criteria of Needle valve 

 Needle valves can be selected based on four main criteria. Material, pressure, port and orifice sizes, and temperature. The most common materials used in the manufacture of needle valves are stainless steel and brass. Brass valves are suitable for non-corrosive applications such as drinking water flow systems. Stainless steel valves are commonly used for highly corrosive media such as seawater and acids, both materials can withstand the high temperatures of liquids, but stainless steel valves are durable and corrosion-resistant. Is better than brass needle valves.

The valve can be selected according to the pressure rating. The rugged needle valve can withstand pressures up to 415 bar. However, some needle valves can handle pressures up to 690 bar. Needle valves are available in a variety of port and orifice sizes. Typical needle valve connection sizes range from 2mm to 12mm.

Proper port and orifice sizes can increase flow efficiency and prevent system leaks. Needle valves are suitable for a variety of temperature applications. It can easily handle both very low and high temperatures, depending on the resistance of the sealant. Teflon sealant can withstand temperatures from 54°C to 232°C. In contrast, the sealant polyetheretherketone (PEEK)  can reach temperatures up to 315°C.

Types of  Needle valves 

There are basically two types of needle valves, which are explained below.

 1. In-line needle valve: (type of needle valve) 

These valves have inlet and outlet openings aligned. These valves can usually be mounted on straight flow systems.

 2. Angle needle valve: (type of needle valve) 

These valves have inlets and outlets at specific angles. A 90-degree elbow is typically installed between the entrance and exit to improve system integration. This type of valve is used where the pipe is bent.

We have briefly described the components of the needle valve here, but there is not enough space to describe all of the configuration variations offered by the various Needle Valves Manufacturers available. 

There are so many choices and variations, so be sure to work with a company that is familiar with all the options available. If you are looking for a Needle Valves Supplier, then Techtubes will be the best option for you!!

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For More Details on  How to Choose a Needle Valve contact us on

***Monel, Hastelloy, Inconel, Incoloy, SMO254, Nitronic, AL6XN, Stellite, Sanicro, Tantalum, Nimonic , Alloy A286, Invar, Cupronickel etc., are the trademarks of their respective companies.


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A Complete Guide to Stainless Steel Bulkhead Fittings

Bulkhead fittings are specially built fittings that allow liquids during a tank to flow freely and drum drainage and other plumbing connections. during a piping scheme, these fittings are often used as delivery outlets. Bulkhead fittings provide an endless flow of water and are often wont to connect flexible pipes using male adapters.
A bulkhead fitting may be a connector that's intended to be placed on a flat surface after passing through a tank wall. The fitting is formed from a bulkhead with a pipe socket or a threaded attachment, a gasket, and a locking nut. Bulkhead fittings are available in a sort of sizes and materials. These fittings usually have left-handed threads that aid keeps the fitting intact and solid when installing the male adapter. chrome steel bulkhead fitting, when combined with unions, makes it easier to get rid of pumps and accessories. Bulkhead fittings also are sold with nuts and gaskets as extras. Typically, gaskets are obtained separately.


Tips to buy Bulkhead Fittings

The following considerations should be weighed when purchasing bulkhead fittings:

  • The thread size of the fitting is often determined when ordering bulkhead fittings in bulk.
  • Since bulkhead fittings function delivery outlets in piping systems, the diameter of the bulkhead fitting is critical.
  • When purchasing bulkhead fittings, the size of the fitting is additionally a big factor to recollect.
  • The consistency and strength of the fabric wont to make the fitting also are essential factors to recollect.

Also, Read: Common types of tube fittings,

How to Install Bulkhead Fittings?

The steps for installing bulkhead fittings are as follows:

  1. Hole Drilling: to put in a bulkhead fitting, first cut or bore a hole at rock bottom of the tank or reservoir to which the pipes are often attached. make certain you weigh and choose the size of the bulkhead’s exterior, so you recognize how big to drill the opening.
  2. Bulkhead Fitting: After drilling the opening, install the bulkhead fitting with the threads inside or outside the tank or reservoir, counting on how you would like the connections to figure.
  3. Gasket and Locknut Fittings: Finally, install the gasket.

Use one gasket on either side of the walls if you've got two. Thread the locknut down by applying pressure to the gasket together with your palm. The locknut would then have a solid-liquid seal with no leaks. But take care to not over-tighten to avoid breaking or distorting the gasket and causing a leak.

The Advantages of Using Bulkhead Fittings

  • The bulkhead fitting would offer a liquid-tight link.
  • They are ideal for plumbing links in hydroponics or aquaponics.
  • They facilitate the availability of water into the tanks or reservoirs.
  • Several Stainless-steel bulkhead fitting is usually utilized in the sink to permit fast water flow.
  • Water leakage isn't a problem with bulkhead fittings.
  • They are often utilized in any mechanism that permits large drums or barrels to be crammed with water.
  • They are often utilized in ponds to link pipes that leave fast drainage. instead of scooping water from the bucket, this makes changing water faster.
  • They are commonly found in predicament pipe systems, especially brass bulkhead fittings.
  • Typically utilized in the transportation of liquid tanks.

With that said, you’ve learned a thing or two about what a bulkhead fitting is. it's therefore essential to follow this guide for a successful stainless-steel bulkhead fitting job.

Thank you for reading our blog! Your comments will help us improve our content, please feel free to post your comments.

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***Monel, Hastelloy, Inconel, Incoloy, SMO254, Nitronic, AL6XN, Stellite, Sanicro, Tantalum, Nimonic , Alloy A286, Invar, Cupronickel etc., are the trademarks of their respective companies.

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