Kinvalve Angle Seat Valve
Kinvalve angle seat valve is a kind of pneumatic piston valve actuated in 2/2 way style. Nearly straight flow path to achieve large flow rate and small pressure loss. Millions of cycle life ideal for operation in steam, water and even aggressive fluids.

Your Trusted Angle Seat Valve Manufacturer

  • Long lifespan with over 1,000,000 times working cycles
  • Large flow capacity with low-pressure drop
  • Full range of end connections
  • 1-angle-seat-valve-workshop
  • 2-pre-test-angle-seat-valve

Kinvalve stainless steel angle seat valve is equipped with a pneumatic piston. The piston housing material can be stainless steel and plastic for high pressure or cost effective choice.

Our angle seat valve can be used for high temperature applications when it uses PTFE sealing and NBR, VITON or EPDM for lower temperature and cost down.

Key Benefits:

  • Sizes available in 1/2”- 3”
  • Controlling Medium: Natural gas, Air
  • Working Pressure: 0 – 16bar
  • Medium Temperature: -10°C – 180°C
  • Ambient Temperature: -10°C – 60°C
  • Body: ASTM A351 CF8M/CF8
  • Stem: SS316/304
  • Seat: PTFE
  • Seal: PTFE or RPTFE
  • Actuator: SS304, Aluminum, or Plastic
  • End Connection: Threaded, welded, tri-clamp, flanged
  • Function: 2/2 NC, NO, Double Acting

Kinvalve Angle Seat Valve Boom Your Business

It can be said that if you want to use the stop valve to adjust your pipeline flow, the pneumatic angle seat valve is your best choice.

You can use it for general applications such as water, steam or even severe condition like aggressive flows. At Kinvalve, this angle seat valve is famous as a pneumatic angle seat valve or angle seat piston valve.

Kinvalve angle seat valve is a pneumatically controlled globe valve with a piston actuator. When you open the angle seat valve, the piston drives the stem to lift the closure from the seat. This linear movement excels in eliminating water hammer by slower actuation.

Kinvalve’s unique angle seat design can benefit you a lot. Large capacity ensures the closure to retract farther from the seat, providing less flow resistance. The closure with PTFE cushion provides you with reliable bubble tight shutoff.

Kinvalve can supply a full range of accessories including limit switches, solenoid valves, manual override devices, stoke limiters for your automatic control applications.


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Kinvlave: Your Custom Angle Seat Valve Manufacturer

As an expert of angle seat valve manufacturer, Kinvalve angle piston valves are widely used in food and beverage, textile dyeing and bleaching, sterilize and auto-clave for hospital and the pharmaceutical industry, laundries and other industrial applications where precise and reliable control is required.

At Kinvalve, you can customize the control mode of your angle seat piston valve. You can choose from Normally Closed Mode (NC), Normally Open Mode (NO) or Double Acting Mode (DA) to match your specific requirements.

You also can customize the interface port patterns of the piston body. You can decide on general threaded ports to connect any other pneumatic components easily or NAMUR ports directly mounting NAMUR type solenoid valves with high performance.

For your convenience of installation, the actuator head of our pneumatic angle seat valve can be rotated 360 degrees until you can find a suitable installation position for your air or electric lines.

And generally, this type of non-rising angle piston valve will be equipped with a visual indicator on the top of the piston to indicate the open/close status.

Our angle piston valves are available in stainless steel and carbon steel on your request. Kinvalve stainless steel angle seat valve is available in a full range of end connections including threaded, flanged, tri-clamp and welded end connections.

Put things right once forever, it has been approved that Kinvalve pneumatic angle seat valves have long cycle life with over 1,000,000 times of working lifespan.

In the case of pneumatic angle seat valve, our unique design with self-adjustable double packing glands, extended spindle guide and wiper seal ensuring zero leakage and high quality.

As one of the best angle seat valve manufacturers, Kinvalve continues to manufacture and design improved angle globe valves to satisfy all your specifications. Just send us an inquiry now.

Angle Seat Valve: The Ultimate FAQ Guide

In this guide, you will find all information about angle seat valves – from features, design, working principle, safety instructions and connection mechanism, amongst others.

So, if you want to learn more about angle seat valves, read this guide.

What is an Angle Seat Valve?

Angle seat valve

Angel seat valve

An angle seat valve is a mechanical contraption that consists of two-piston valves that are actuated by a pneumatic system.

The actuator component of the angle seat valve performs the action of providing linear motion.

This is in order to lift a seal from its seat, thereby, resulting in reduced pressure loss and improved flow rates.

The open position of the angle seat valve does not impede flow, since the seat is functionally placed under said angle.

Angle seat valves are particularly designed to withstand harsh conditions and to last long.

Therefore, this makes them perfect alternatives to ball valves.

What are the Components of Angle Seat Valves?

Parts of angle seat valve

Parts of angle seat valve

i. Robust Stem Seal and a Seat.

The valve seat is a circular ring made of hard metal.

Its main purpose is to provide an invariable surface seal for the valve face component.

Usually, valve seats are made of materials like steel or bronze which are configured to considerably larger sizes.

To install the valve seat, the cylinder head is heated.

Later on chilled and pressed with a unique tool known as Mandrel.

Once the entire apparatus cools down, the cylinder head will shrink and remain firmly attached to the valve seat.

When this is done, the valve seat is ground to provide a sealing surface for the valve face.

Generally, the valve seat is connected in the same angle as the valve face.

Nevertheless, some instances where it may be connected shallower or lower than the valve face exist.

ii. Plug

It is pinned to the shaft.

Its main purpose is to create necessary conditions for optimal sealing by allowing seat pivoting.

iii. Piston

It consists of a mounting pad that allows for optional mounting of other types of valves e.g., solenoid valves.

iv. Actuator

This component consists of a head that rotates to allow optimal positioning of electric and air lines in tight locations.

It is a mechanism that enables the valve to shift from one position and back.

v. Valve Body

This component creates conditions necessary for further retraction of the plug.

It provides, higher flow coefficients (CV) and comes in three variations.

They may include:

  • Double acting valves
  • Normally closed valves
  • Normally opened valves

The valve guide component is a cylindrically shaped sleeve that supports the valve stem.

It also ensures that the valve face is aligned with the seat component.

These are usually made of materials like bronze, aluminium, tin or steel and are installed in the same way as the valve seat.

Other components include:

  • Supply and exhaust ports
  • Steam shaft
  • Bushing assembly and the cover

They are usually made of stainless steel.

The angle seat valve also has sprung.

They are helical coiled and are positioned in the cylinder head.

Their main purpose is to provide a force that holds the valve face onto the seat firmly.

At least two valves can be used to prevent valve float or surge.

A phenomenon that occurs valve spring frequency vibrates thereby losing the ability to hold the valve face down.

How do Angle Seat Valves Work?

The piston actuator component of the angle seat valve is controlled by air pressure to cause two actions.

That is, lifting the seal from its seat or pushing it downwards.

The normally opened angle seat valves will strictly have its valve opening only when air pressure is exerted.

In normally closed angle seat valves, on the other hand, the valve is not closed by a pressure but rather a spring, which also returns it to its initial position.

Double-acting angle seat valves are dependent on air supply to control the position of the valve because they do not have springs.

What is Valve Face Angle?

This the part of the valve surface that is in contact with the seat of the angle seat valve.

Usually, it is at an angle of 30° to 60° depending on the engine type.

Generally, the valve seat is connected in the same angle as the valve face.

Nevertheless, some instances where it may be connected shallower or lower than the valve face exist.

How do you Identify the Angle Seat Valve Symbol?

Pneumatic angle seat valve

 Pneumatic angle seat valve

Angle seat valve symbols are representations of details and information pertaining to the valves.

They indicate different positions that the angle seat valve components can operate at.

This is mainly at procedures of activation, and flow channels etc.

The general symbols present in most angle seat valves are often two triangles pointing each other with the tips of inner points touching.

Furthermore, the pipeline are represented by lines connecting to each other side of the angle seat valve symbol.

Each angle valve can be adjusted to two or more positions.

With each position having at least one flow channel.

Each angle seat valve symbol represents said channels and provides detailed descriptions of the same by use of a flow box.

Valves cannot be in two or more different positions simultaneously, thus symbols are used to provide indication of their position.

These are also indicated in flow boxes and are easy to identify because they are usually located close to the active actuator.

These symbols are typically represented in flow boxes and thus easy to identify.

They are labelled differently depending on manufacturer or customer preferences.

Schematic symbols also exist for other components of the angle seat valves but are not as complex as the one we have mentioned above.

What are the Advantages of Angle Seat Valves?

The use of angle seat valve in industrial applications eliminates water hammer.

This is a hydraulic shock phenomenon where a surge in pressure is caused when flowing water is stops suddenly.

Besides, the angle seat valve has a longer life cycle compared to other valve variations such as ball valves.

This is mainly attributed to their robust design and features.

High flow rates can be maintained at a constant regardless of pressure loss.

Our angle seat valve product has an anti water hammer design.

This increases its durability in applications that are aggressive.

We will provide angle seat valves that can be mounted in any position.

It has a visual position indicator, and meets the requirements of safety directives to prevent hazards arising from use of non electrical devices in explosive environments.

Our angle seat valves are enough to be used in a variety of applications.

They can be used to control gas and liquid flow in both open circuits and closed circuits.

The angle seat valves we manufacture can handle viscous liquids with viscosity as high as 600mm²/s because they are very sturdy and simple.

The angle seat valves are insensitive to dirt due to their hygienic design.

What are the Common Challenges of Using Angle Seat Valves?

Some of the most common challenges are:

Water Hammer Effect

This is a problem that occurs due to a surge in pressure.

It occurs when flowing water is stopped suddenly by the valve or when its flow direction is also changed suddenly.

This can cause further problems such as noisy vibrations and even tube failure.

Mechanical Friction

The moving components of the angle seat valve are subject to friction as are other mechanical apparatus.

Furthermore, the main friction point in them being between the stem and the seat.

This puts pressure on the actuator to increase movement force thereby causing the angle seat valve to wear out faster.


Loud and audible sound can be produced as fluid is channelled through an angle seat valve.

This problem may cause vibrations on the system piping which may further lead to complications such as loosened fasteners.

Typically, angle seat valves cost more to maintain than general-purpose solenoid valves and ball valves.

The use of fluids that contain foreign matter can cause problems such as corrosion, malfunction, and seal failure.

Thereby increasing the chances of fast wear of the valve seat.

How do you Check the Quality of the Angle Seat Valve?

Angle seat valves have to conform to certain standards.

Of course, this is before using them for any application.

For instance, a quality angle seat valve can be one that eases flow with minimal leakage or wear and tear.

The housing of the angle seat valve should be made from material that is strong and can resist corrosion.

Examples of these materials are stainless steel, polytetrafluoroethylene (PTFE), and bronze.

The angle seat valve should accommodate high pressure and handle high temperatures as well.

Most high quality angle seat valves can contain working pressure between 72.5 and 290.1 Psi, alongside temperature as high as 200° Celsius.

Other factors you ought to consider when checking the quality of your angle seat valve are:

Angle seat valve

Angle seat valve

· Angle Seat Valve’s Breaking Pressure

This refers to the minimum pressure required to produce fluid through the valve.

· Duty Cycle of the Angle Seat Valve

Continuous operations for long periods without any wear or tear are qualities of a good angle seat valve.

· Flow Patterns

The difference between the inlet and the outlet pressure through the valve.

What is an Angle Seat Piston Valve?

 Angle seat valve

Angle seat valve

An angle seat piston valve is basically a 2/2 way valve whose components engage the use of a sealing disc that is often attached to a metal seat.

The seal disc is located beneath a small piston.

Also, the angle seat piston valve is usually made from stainless steel or brass ergo well suited for perilous environment applications.

How do you Maintain an Angle Seat Valve?

It is worth noting that the actuator component of the angle seat valve requires very minimal maintenance work.

However, you ought to undertake regular visual inspections to ensure the following;

  • Actuator is installed facing upwards
  • Pipeline is clean and free of leaks
  • Angle seat valve is installed as required
  • Medium ports are tightly adjusted

Another maintenance procedure that you can undertake to ensure efficient operation of the angle seat valves is CLEANING.

This should be done with body material compatible agents only to avoid hazards.

Angle seat valve maintenance does not have to be complicated.

You also need to comply with maximum and minimum operating pressures to prevent the angle seat valve from leaking.

In the case of damaged parts, you should consider replacing the faulty components before continuing operations.

The angle seat valve must be connected to clean pipe or liquid lines.

You should ensure that the angle seat valve is connected to the piping system in accordance to requirements whilst paying attention to flow directions.

Once connected to the piping system, the actuator should not be removed.

This is to avoid complications in your operations.

Fluid and air supply in the piping system should also be monitored to ensure compliance to minimum and maximum pressure requirements.

Before you consider opening or servicing the angle seat valve, you need to:

  • Shut off the fluid supply
  • Control the air supply
  • Reduce the pressure in the piping system

You also need to lubricate the mechanical components/ moving components of the angle seat valve.

This is an overlooked but inexpensive maintenance procedure.

Thou, it goes a long way in reducing the likelihood of wearing and tearing out of your angle seat valve parts.

What are the Safety Instructions for Handling Angle Seat Valves?

Inappropriate handling of angle seat valves can be hazardous to operators, the environment, and even close equipment.

The following safety regulations are therefore to be observed:

 Open and closed angle seat valves

 Open and closed angle seat valves

a. You should turn down pressure and ventilating lines before working on an angle seat valve to avoid injuries that result from high pressure.

b. Also, you need to turn the power supply off or secure the angle seat valve against reactivation to prevent injury resulting from electric shock.

c. You should not touch the angle seat valve with your bare hands to avoid injuries e.g., burns and fire resulting from extended operation periods.

Where can you Use Angle Seat Valves?

Angle seat valves are applicable in delivering multiple operation cycles in numerous applications such as aggressive media, steam and water.

They are also suitable for vacuum applications.

This is because they are able to handle up to 1000 cycles each hour in fast acting applications.

Angle seat valves are used in a number of sectors, such as oil and gas, sewage, water, beverage, and so on.

Angle seat valves can also be used in cooling systems that involve injection molding equipment e.g., in the plastic processing industry.

They can be used in steam supply for sterilising machines, water applications like pulp, concrete and mining, and aggressive fluid applications.

What is the Difference Between Manual Angle Seat Valves and Pneumatic Angle Seat Valves?

Pneumatic angle seat valves work by principle of pressurized air getting fed into a reservoir through compressors.

This pushes the seal downward onto the seat.

The pressurized air is contained in the diaphragm component of the angle seat valve.

Generally, the seal does not depend on any manual action to move away from or towards the valve seat.

Pneumatic angle seat valves have actuators made of stainless steel and are therefore well suited for operation in aggressive application processes.

They have spindle seals that can self-adjust, ergo assuring a relatively long lifespan.

Engineers can operate the actuator in isolation from the environment because it has an exhaust airport.

Pneumatic angle seat valves are also robust and clean able due to their welding, thereby ensuring hygiene and an optimal lifetime.

High flow rates are attained with the optimized stainless steel body. Explosion-proof pneumatic angle seat valve variants are also available in out catalogue.

Pneumatic angle seat valves offer the following advantages.

  • Stainless steel body that is optimised for multiple line connection flow.
  • Components that ensure long lifetime.
  • Versatile stainless steel actuator that is applicable in demanding and aggressive environments.
  • Position feedback and stroke limitation accessories can be added.

Manual angle seat valves are piloted externally.

The seal is completely dependent on external manual action to move away from or towards the valve seat.

The seal component is controlled manually by a spindle.

Manual angle seat valves can last very long and require relatively low maintenance.

Manual angle seat valves come with the following advantages.

  • Manual Angle seat valve it has a superior flow regulation compacting compared to pneumatic Angles seat valve.
  • Manual seat valve it has high cycling life where as pneumatic has Steam distribution.
  • Manual angle seat valves generally have better regulation properties compared to pneumatic angle seat valves which have steam distribution.
  • Manual seat valve have relatively cheap and easy maintenance procedures compared to pneumatic angle seat valves which tend to be more costly.
  • Manual angle seat valves are well suited for applications in the textile industry, pharmaceutical, and cosmetic industries while pneumatic angle seat valves are well suited for more aggressive applications such as industrial washing and cleaning.

What is the Difference Between Double-Acting Angle Seat Valves, Normally Opened Angle Seat valves, and Normally Closed Angle Seat Valves?

Angle seat valve

 Angle seat valve

· Normally Opened Angle Seat Valves

A two way normally opened angle seat valve contains two connections, an outlet and an inlet.

The outlet is naturally open and fluid flows in through the inlet and out through the outlet.

When the angle seat valve is in operation, the plunger component is pushed downwards onto the seat.

Therefore, stops flow through it and vice versa.

This type of angle seat valve makes automated gas and fluid control possible and easy.

Normally Closed Angle Seat Valves.

In this variation of angle seat valves, there exists a hollow shaft component.

This component facilitates line pressure-flow directly to the diaphragm.

This forces the diaphragm downwards ultimately closing the valve.

The force comes about because the diaphragm has a larger surface area compared to the inlet. The valve stays closed until enough pressure is exerted onto the diaphragm once again to make it open.

Double Acting Angle Seat Valves

Double acting angle seat valves are often used to handle flow in different directions, usually opposite.

They are dependent on air supply to control the positioning of the valve since they do not have springs.

These types of angle seat valves are preferable to other types because they eliminate the water hammer problem.

However, they do have reduced maximum working pressure and may require additional components to work more efficiently e.g., larger actuators.

How do you Connect Angle Seat Valve to Piping System?

Threaded Type Angle Seat Valve Connection

These are common in angle seat valves that are connected by screwing them onto pipes with male threads.

That is, the valve is screwed over the easy ring until it reaches the thread end. This connection remains tight regardless of any future adjustments.

Clamped Type Angle Seat Valve Connection

This angle seat valve connection comprises the use of a cone connection system.

Additionally, there are length compensation features that ensure easy and fast connection of the angle seat valve onto the piping system.

However, there are angle seat valves without these features. For such, gaskets and union nuts may be used.

Flanged Type Angle Seat Valve Connection

This angle seat valve connection type involves the welding of valves on screw flanges that are further placed into threaded angle valves or tri-clamps.

They slide easily into pipework systems and reduce leaks.

How can you Control Angle Seat Valves with Solenoid Valves?

Double acting angle seat valves consist of multiple ports which are impossible to control with just a single three way valve.

Thus they can only be controlled by a five way solenoid valve.

The solenoid valve conversely builds pressure on one port while lowering pressure from the other.

What Material are Angle Seat Valves Made of?

The body of the angle seat valve is made from a wide variety of materials ranging from 304 and 316 (CF8M) Steel Austenitic alloy, bronze, stainless steel, or plastic.

The material used should be in compliance with the requirements for the media to be controlled in aspects such as pressure, temperature, sealing, and body compatibility.

What Determines the Price of an Angle Seat Valve?

You should consider the following key aspects:

Construction and Design

The body of the angle seat valve plays a crucial role in determining its price.

Normally opened, normally closed, and double acting angle seat valves all have different costs due to the difference in their construction and design features.

Some designs can accommodate higher maximum flow rates than other variations thus are more expensive.

End Connection and Line Size

Angle seat valves come in different sizes and have distinct end connection lines depending on their costs.

The nominal diameter of the valve seat component helps to determine the minimum required flow rates for your application.

Larger valve sizes are more costly because they enhance higher and more efficient flow rates.

Temperature/pressure Operating Conditions and Properties of used Materials

The typical maximum working pressure of angle seat valves ranges between 72.5 Psi to 290 Psi.

The pressure of the compressed air circuits also play crucial roles in pricing angle seat valves.

Angle seat valves that can accommodate higher pressure ranges are often more expensive.

These angle seat valves can also withstand temperatures as high as 200° Celsius. Use of PTFE material in the sealing makes this possible.

Other cheaper sealing materials with lower ratings are EPDM, nitrile Buna rubber, and FKM(Viton).

How does Angle Seat Valve Compare to Ball Valve?

Ball valve

 Ball valve

Angle seat valve

Angle seat valve

Ball valves are primarily used in controlling the flow rates of liquids and gases.

The valve is driven a valve system and rotates around the axis of the ball.

They have distinct features which give them an edge over angle seat valves and some cons which make them not well suited for certain applications.

To begin with, ball valves give very good deals compared to angle seat valves.

There will practically be no leakage in your system once you close the valve fully.

Ball valves, unlike angle seat valves, do not reduce the pressure of the liquid once the valve is opened fully and do not restrict the movement of said fluid.

Ball valves are a form of quarter-turn valves that employ the use of hollow, pivoting and perforated ball to control the flow of liquid or air through it.

It is usually open when the ball’s hole is in line with the flow and closed when the ball is pivoted at 90 degrees by the valve handle.

While Angle seat valve is a pneumatic controlled valve with a piston actuator providing linear actuation to lift a seal of its seat.

The seat is set at an angle to provide maximum possible flow when unseated.

Ball valves are a relatively cheaper variation of valves compared to angle seat valves.

Ball valves have a high level of leak secure tightness.

Furthermore, ball valves are applicable to all operating media.

Also, ball valves can use different types of actuators in contrast to angle seat valves which can only use one exclusive type of actuator.

What Determines the Lifespan of an Angle Seat Valve?

Degree of maintenance: Angle seat valves tend to last longer and stay operational when maintained as per the regulations.

Routine inspections and replacement of parts are some methods of maintenance that go a long way in preventing damage or wear and tear of the angle seat valve.

At Kinvalve, we design and manufacture a range of angle seat valves depending on your unique requirements and specifications.

Contact us now for all your angel seat valves.

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