how does a safety valve work pricelist

Some people have proposed a “safety valve” to control the costs of a cap-and-trade policy to fight global warming. This post explains what a safety valve is, and why it provides only an illusion of cost management.

In a cap-and-trade program, companies can choose either to lower emissions below the cap, or buy extra allowances. Some worry that if many companies need to buy extra allowances, demand will drive up the price, placing an undue burden on businesses.

The “safety valve” or “escape hatch” is meant to address this. It specifies that when prices reach a predetermined dollar value, businesses no longer have to rely on the established supply of allowances available in the market. Instead, the federal government makes new allowances available for sale at a specified price – potentially in an unlimited quantity.

There are two problems with this approach:A safety valve destroys the cap. The hard limit on emissions is the cornerstone of a cap-and-trade policy. Without a solid cap, we can’t be sure our emissions will go down enough to avoid the worst consequences of global warming. A safety valve gives the illusion that we are controlling emissions while allowing more greenhouse gas pollution into the atmosphere.

A safety valve limits the economic opportunity of those who develop cleaner technology. Higher permit prices signal the market to invest more in innovative low-carbon technologies – happy news if you’re in the business of inventing and selling ways to cut pollution. A safety valve would sharply curtail incentive for innovation. This drives up costs in the long run, and discourages the development of the clean technology we need.

A safety valve seriously undermines the main advantages of a cap. Its ability to control costs is an illusion, it lets more pollution into the atmosphere, and discourages entrepreneurs from investing in pollution-cutting technology.

A. No easy way if not any historical data, and if you do not have a complete offer for maintenance service (this can be bought from specialiced companies - you could ask one of those)

6. Calculate sparepart costs (if any), service cost pr. hour (if any) times number of services per time periode (once a year minimum for functional test, repairs and service cost more seldom?)for each single valve to get total cost.

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As soon as mankind was able to boil water to create steam, the necessity of the safety device became evident. As long as 2000 years ago, the Chinese were using cauldrons with hinged lids to allow (relatively) safer production of steam. At the beginning of the 14th century, chemists used conical plugs and later, compressed springs to act as safety devices on pressurised vessels.

Early in the 19th century, boiler explosions on ships and locomotives frequently resulted from faulty safety devices, which led to the development of the first safety relief valves.

In 1848, Charles Retchie invented the accumulation chamber, which increases the compression surface within the safety valve allowing it to open rapidly within a narrow overpressure margin.

Today, most steam users are compelled by local health and safety regulations to ensure that their plant and processes incorporate safety devices and precautions, which ensure that dangerous conditions are prevented.

The principle type of device used to prevent overpressure in plant is the safety or safety relief valve. The safety valve operates by releasing a volume of fluid from within the plant when a predetermined maximum pressure is reached, thereby reducing the excess pressure in a safe manner. As the safety valve may be the only remaining device to prevent catastrophic failure under overpressure conditions, it is important that any such device is capable of operating at all times and under all possible conditions.

Safety valves should be installed wherever the maximum allowable working pressure (MAWP) of a system or pressure-containing vessel is likely to be exceeded. In steam systems, safety valves are typically used for boiler overpressure protection and other applications such as downstream of pressure reducing controls. Although their primary role is for safety, safety valves are also used in process operations to prevent product damage due to excess pressure. Pressure excess can be generated in a number of different situations, including:

The terms ‘safety valve’ and ‘safety relief valve’ are generic terms to describe many varieties of pressure relief devices that are designed to prevent excessive internal fluid pressure build-up. A wide range of different valves is available for many different applications and performance criteria.

In most national standards, specific definitions are given for the terms associated with safety and safety relief valves. There are several notable differences between the terminology used in the USA and Europe. One of the most important differences is that a valve referred to as a ‘safety valve’ in Europe is referred to as a ‘safety relief valve’ or ‘pressure relief valve’ in the USA. In addition, the term ‘safety valve’ in the USA generally refers specifically to the full-lift type of safety valve used in Europe.

Pressure relief valve- A spring-loaded pressure relief valve which is designed to open to relieve excess pressure and to reclose and prevent the further flow of fluid after normal conditions have been restored. It is characterised by a rapid-opening ‘pop’ action or by opening in a manner generally proportional to the increase in pressure over the opening pressure. It may be used for either compressible or incompressible fluids, depending on design, adjustment, or application.

Safety valves are primarily used with compressible gases and in particular for steam and air services. However, they can also be used for process type applications where they may be needed to protect the plant or to prevent spoilage of the product being processed.

Relief valve - A pressure relief device actuated by inlet static pressure having a gradual lift generally proportional to the increase in pressure over opening pressure.

Relief valves are commonly used in liquid systems, especially for lower capacities and thermal expansion duty. They can also be used on pumped systems as pressure overspill devices.

Safety relief valve - A pressure relief valve characterised by rapid opening or pop action, or by opening in proportion to the increase in pressure over the opening pressure, depending on the application, and which may be used either for liquid or compressible fluid.

In general, the safety relief valve will perform as a safety valve when used in a compressible gas system, but it will open in proportion to the overpressure when used in liquid systems, as would a relief valve.

Safety valve- A valve which automatically, without the assistance of any energy other than that of the fluid concerned, discharges a quantity of the fluid so as to prevent a predetermined safe pressure being exceeded, and which is designed to re-close and prevent further flow of fluid after normal pressure conditions of service have been restored.

Safety valves or pressure relief valves are pressure regulating devices that are responsible for expelling excess pressure from the system when the maximum pressure levels for which they have been designed are exceeded, usually due to a

Safety valves perform their function when the pressure of the system where the fluid is contained, becomes higher than the maximum set pressure of the valve previously adjusted. When the system pressure is higher than the valve’s set

pressure, this opens, releasing the excess pressure to the atmosphere or to containment tanks, depending on the toxicity of the fluid. After releasing the excess, the valve closes again and the system pressure returns to normal.

To ensure total safety of personnel and installation, make sure that the valves have passed all safety tests and meet the requirements of the system where they are to be installed. All our valves are supplied with certificates of materials, cas-

What is the difference between the instantaneous full opening safety valve AIT (PSV) and the normal opening relief valve AN or progressive opening relief valve AP (PRV)?

The Pressure Safety Valve (PSV) opens instantaneously and fully upon reaching the set pressure for which it is designed, expelling the excess pressure from the system immediately. They are optimised for use with steam or gases.

In contrast, the normally or progressively opening Pressure Relief Valve (PRV) opens gradually as the system pressure rises above the set pressure of the valve above its setting. They are optimised to work with liquids.

At VYC Industrial we are specialists in the design and manufacture of all types of safety valves. We have a wide range of safety valves to cover all the needs of the sector.

The Mod. 496 EN safety valve works as an automatic pressure releasing regulator activated by the static pressure existing at the entrance to the valve and is characterized by its ability to open instantly and totally.

The Mod. 495 EN pressure relief valve works as an automatic pressure releasing regulator activated by the static pressure existing at the entrance to the valve and is characterized by its ability to open instantly and totally.

The relief valve works as an automatic pressure releasing regulator activated by the static pressure existing at the entrance to the valve and is characterized by its ability to open instantly and totally.

The valve works as an automatic pressure releasing regulator activated by the static pressure existing at the entrance to the valve and is characterized by its ability to open instantly and totally.

The valve works as an automatic pressure releasing regulator activated by the static pressure existing at the entrance to the valve and is characterized by its ability to open instantly and totally.

The valve works as an automatic pressure releasing regulator activated by the static pressure existing at the entrance to the valve and is characterized by its ability to open instantly and totally.

The valve works as an automatic pressure releasing regulator activated by the static pressure existing at the entrance to the valve and is characterized by its ability to open instantly and totally.

The valve works as an automatic pressure releasing regulator activated by the static pressure existing at the entrance to the valve and is characterized by its ability to open instantly and totally.

The valve works as an automatic pressure releasing regulator activated by the static pressure existing at the entrance to the valve and is characterized by its ability to open, at the fi rst proportional to the pressure increase, and after instantly and totally.

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The valve works as an automatic pressure releasing regulator activated by the static pressure existing at the entrance to the valve and is characterized by its ability to open, at the fi rst proportional to the pressure increase, and after instantly and totally.

The valve works as an automatic pressure releasing regulator activated by the static pressure existing at the entrance to the valve and is characterized by its ability to open, at the fi rst proportional to the pressure increase, and after instantly and totally.

The valve works as an automatic pressure releasing regulator activated by the static pressure existing at the entrance to the valve and is characterized by its ability to open proportional to the pressure increase.

The valve works as an automatic pressure releasing regulator activated by the static pressure existing at the entrance to the valve and is characterized by its ability to open proportional to the pressure increase.

The valve works as an automatic pressure releasing regulator activated by the static pressure existing at the entrance to the valve and is characterized by its ability to open instantly and totally.

The valve works as an automatic pressure releasing regulator activated by the static pressure existing at the entrance to the valve and is characterized by its ability to open instantly and totally.

The valve works as an automatic pressure releasing regulator activated by the static pressure existing at the entrance to the valve and is characterized by its ability to open instantly and totally.

The valve works as an automatic pressure releasing regulator activated by the static pressure existing at the entrance to the valve and is characterized by its ability to open instantly and totally.

The valve works as an automatic pressure releasing regulator activated by the static pressure existing at the entrance to the valve and is characterized by its ability to open instantly and totally.

They are used in places such as power, chemical and petrochemical plants to discharge safety valves, control valves, etc. in pressure lines and equipment that convey compressible substances such as steam, air, carbon dioxide, helium, methane, nitrogen, oxygen and other gases.

Test bench for regular inspections and setting and resetting safety valves. Ideal for distributors, maintenance companies or with in-house maintenance. It allows safety valves to be adjusted, tested and/or checked to the test pressure (setting) Pe wile cold (simulating service conditions), matching the opening pressure Ps and the closing pressure Pc, in accordance with the standard regulations.

Controlled safety pressure relief system CSPRS valves are mainly used where conventional direct-loaded spring action valves cannot guarantee the opening and closing margins that certain specifi c conditions of service demand.

The objective is to help the closure by means of pressure so that the valve remains completely watertight until reaching the set pressure and/or to activate the opening with pressure.

Once evacuated and in keeping with a previous adjustment, to assist with closing pressure, to once again achieve closure with the desired watertightness.

Increase the operating pressure of the system up to 99.9% of the set pressure.The control safety pressure relief system CSPRS device can be used with any safety valve available in the market and in particular, with models VYC Mod. 485, 486, 494, 495 and 496.

Home safety valves have varying types and lengths. On Alibaba.com, one of the most commonly found safety valves is varying in size and they come in different types. Steel butterfly valves are offered to pressure and animals control aids at the pressure of animals to do so with a compound annual growth rate (CAGR))

They are used in preventing air compressors, such as air compressors. Air compressor safety valves allow for compressed air, to be compressed with or without compressed air, and they also be in the form of a normally checked safety valve, preventing air compressors, and compressed air. A compressor safety valves allow for air compressors, to also compress air with a compressed air type.

On Alibaba.com, there are several types of safety valves, including solid pressure valves and cordless safety valves. Some of them are equipped with different features such as air pressure valves and air pressure valves, including Alibaba.com"s wholesale catalogue of safety valves available from international suppliers. Some door lock prevent valves are operate automatically and one of the core functions of the door lock will operate accordingly. If the door is locked or automatically locked, there are several types of safety valves, including alkolic safety valves, self-contained safety valves, and pressure-sensitive safety valves, including Alibaba.com ’ s suppliers. Some have a door lock that operate automatically, if the is a door-safe that does not have to compromise the handle of the vehicle and it is easy to operate.

If electric volves are varying in their way, they will not interfere with the Checkers or Alibaba.com"s selection of electric safety valves at varying levels. On the other hand, electric safety valves vary in terms of the type of material they are made of and thus require less maintenance.

Pressure valves regulatethe flow of gas through a pipeline by opening or closing in response to changes in the pressure of the gas, air, water, or steam flowing through the pipe. Pressure valves are commonly used on natural gas systems, propane systems, and other types of gas systems.

A pressure valve regulates the flow of gas through pipelines by opening or closing in accordance with changes in the pressure of gas flowing through the pipe, thereby maintaining a constant pressure within the pipeline.

Pressure valves work by using a spring-loaded diaphragm or electrical actuator to open or close the valve in the pipeline. As the pressure inside the pipeline rises, the diaphragm moves away from the valve seat, allowing more gas to pass through. Conversely, as the pressure falls, the diaphragms move toward the valve seat, restricting the flow of gas.

Testing a pressure valve should be done before installing it into a system. If there are leaks in the pipe, the valve will not work properly. To test a pressure valve, use a leak detector to check for leaks in the pipe. Then, turn off the main supply line and connect a gauge to the valve. Turn the valve on slowly until the pressure reaches the desired level. Once the pressure has reached the desired level, turn the valve off and wait for the pressure to drop back down to normal levels.

Pressure valve control is used in many applications, but they’re mainly found in all pneumatic and hydraulic systems. Pressure valve control has a wide range of functions that can be used to maintain a set pressure level in a part of a control loop or to keep system pressures below a desired limit.

There are many different types of pressure valve control in the industry, such as pressure relief valves, pressure reducing valves, pressure safety valves, counterbalance valves, unloading valves, and sequencing valves. Most of these pressure valves are typically closed valves, but pressure reducing valves are commonly open valves. It’s important for most of these valves to have restrictions so that the required pressure control can be achieved.

The flow must be consistent at all times in certain applications. Injuries or deaths can be caused by variations in the flow of gases. That’s why pressure control valves are so important in the processing loop.

Pressure relief valves are used to keep the pneumatic and hydraulic systems under the desired pressure value. Based on the different installation positions, pressure relief valves have different functions as below. The downstream pressure should be reduced to a constant level whenever it goes over a threshold.

A pressure relief valve is usually made of three parts: a ball/diaphragm, a spring-loaded mechanism, and a valve nozzle. A spring-loaded mechanism is placed in the valve’s housing, which is used to close the orifice. The pressure relief valve’s spring-loaded mechanism can be adjusted to change the pressure on the spring mechanism. If you want to increase the set pressure limit, just simply increase the pressure on the valve spring-load mechanism directly. If you want to decrease the set pressure limit, only decrease the pressure on the spring-load mechanism directly. A relief valve set-pressure can be specified by the manufacturer if there is no adjustability. When the set pressure is reached, the pressure overcomes the spring pressure and pushes the ball or diaphragm back opening the orifice and releasing the excess pressure. Depending on the media, it is either released into the atmosphere or discharged into it. It is possible to return to a tank or pumping circuit with compressed air.

There are two types of PRVs used in industry, one is the direct-acting pressure reducing valves, and the other type is pilot operated pressure reducing valves. The pressure reducing valves use globe type or angle type valve bodies. Most of the time, the main type of valve used in water systems is the direct acting valve, which consists of a globe-type body with a spring-loaded, heat-resistant diaphragm connected to the outlet of the valve that acts upon a spring. This spring holds a pre-set tension on the PRVs seat that’s installed with a pressure equalizing mechanism for precise water pressure control.

Pressure reducing valves are widely used in water conditions, such as in buildings, industrial plants, water treatment plants, homes, and so on. It will automatically reduce the water pressure from the main supply, in case to lower the water pressure to the destination and more sensible pressure for equipment.

Sequence valves are widely used in hydraulic systems, and are a type of pressure valve. Sequence valves are similar to pressure relief valves, but are used to control a set of pressure-related operating sequences. The main function of a sequence valve is to divert the flow in a predetermined sequence, and its construction is very similar to a pressure relief valve, which is a pressure actuated valve, usually a closed valve.

The sequence valve works on the principle that the valve plug will be moved when the main system pressure exceeds the spring setting. As a result, the outlet of the sequence valve will remain closed until the upstream pressure rises to a predetermined value, and then the valve will open, allowing air to transfer from the inlet to the outlet. Sequence valves are primarily used to force two actuators to operate in sequence. One nice feature of the sequence valve is that the valve has a separate drain connection to the spring chamber, under normal operating conditions, high pressures may occur at the output port. When the pressure rises above its limit, the pressure sequence valve will allow flow to occur in another part of the system. The pressure sequence valve is installed in a pneumatic control and its switching operation requires a specific pressure.

Counterbalance valves are used to handle loads that are over-limited and to safely suspend loads, these valves commonly work with hydraulic cylinders. This type of valve can also be used with hydraulic motors and is then commonly referred to as a brake valve. Both counterbalance valves and pilot-operated check valves can be used to lock the fluid in the cylinder to prevent drift. However, pilot-operated check valves cannot control over-running loads. A counterbalance valve should be used when uncontrolled motion may occur with an overrunning load.

The pressure safety valve is one of the most critical automatic safety devices in a pressure system, and in many cases is the last line of defense for safety. The important function of a pressure safety valve is overpressure protection, so ensure that the pressure safety valve can operate properly in any situation. Pressure safety valves are mainly used in pressurized vessels or equipment to protect the environment, property safety, and life safety in the event of an overpressure event. A pressure safety valve opens and releases excess pressure in a vessel or equipment, and closes again when normal conditions are restored and prevents the further release of fluid.

After a boiler has been engineered, built and tested for a given operating pressure there is only one reliable way to prevent operation of the boiler above this design pressure.  This is a safety valve.  The safety valve should be sized so that a single valve can handle the maximum steam production rate of the boiler and once open prevent boiler pressure to continue to rise.  Standard operating procedure for the last century has been to install two safety valves on the boiler, one set 3-5 lbs below the design pressure and one valve set at the design pressure.

The 1st valve listed below is a true adjustable differential pop valve.  The differential is adjured through the differential rings lock screw hole, from 3 PSI to whatever the operator desires.  The pressure of the valve can be adjusted from 40 to 200 PSI.

The other valves listed are adjustable for release pressure and have a "pop" action:  The pressure differential is not adjustable on these valves.  If the valves are operated above their nominal pressure, the set-reset differential increases.  If operated at lower pressure, the differential decreases to the point of disappearing about 10-15% below nominal pressure.

Relief and safety Valves are used in high pressure systems to control the pressure and keep balance of the system. The different between safety valves and relief valves is that the safety valves fully open or close under a certain pressure while the relief valves can open in proportion to the pressure in front of them. The safety and pressure relief valves are used automatically. They both operate under similar conditions. When the pressure builds up in a system, it has to be managed by releasing the material to flow through. These valves have a threshold pressure at which they open. The consolidated safety and safety relief valves comprise of a bonnet vent and bellow with springs.

The springs are set up for the threshold pressure and when the pressure exceeds the threshold, the spring is pushed into the bonnet vent and the bellow opens the valve. The Safety Relief Valves can be open and shut valves. They either open or shut off at any given pressure. This is mostly for the safety of an application not to explode under high pressure. The Pressure Relief Valve on the other hand releases the material after the threshold pressure, but not fully. If the pressure is slightly higher the threshold, then the valve opens slightly. If the pressure is very high above the threshold, it opens wider. It also functions in the same manner when the pressure drops down. The valve closes in proportion to the pressure. The safety valve shuts down at once only when the pressure is below the threshold.

Ready Stock of ASTM A351 CF8M Spring Loaded Safety Valve in wide range of Sizes, Stainless Steel Air Compressor Pressure Relief Valve Manufacturers In India

Relief Valves are designed to control pressure in a system While Safety Valves are used for controlling the pressure in a system they release pressure immediately in the event of an emergency or system failure

The Setpoint of relief valve is usually set at 10 Percent above working pressure limit while safety valve is usually set at 3% above working pressure limit.

If you are operating systems that can only be off for short periods of time, it is sensible to keep a spare valve to swap over and then the removed valve can be inspected and recertified.

In order to protect the systems that are designed according to different fluids and a certain pressure against all the adversities, the valves that provide controlled discharge of the fluid (steam, liquid, gas) when the design pressure rises above a certain value are called safety valve.

It releases a certain amount of steam, gas or liquid if the system pressure rises above the valve"s set pressure. In this way, it protects the desired pressure system against unauthorized pressure increases.The safety valve reaches its full discharge capacity with a maximum pressure increase of 10% of the set pressure. Shut-off pressure of the safety valve: It is maximum 10% for compressible materials and less than 20% for incompressible substances.

If you have been searching for a safety release valve that you can use to reduce short-term pressure surges successfully and diminish the effects of gas leaks, this is the product for ...

... regulators have safety valves which will slam shut in the event of emergencies, such as the gas reaching too high a pressure level. The valve works to protect any fittings ...

This product has hydraulically actuated class A gas safety valves to EN 161 used for automatic shut-off. It shuts off when unstimulated for gas and air, ...

The S 104 Safety Shut Off valve is mainly used to avoid any damage to components as well as to avoid too high or too low pressure in the gas train. This could cause high financial losses ...

The S50 Safety Shut Off valve is mainly used to avoid any damage to components as well as to avoid too high or too low pressure in the gas train. This could cause high financial losses ...

The S100 Safety Shut Off valve is mainly used to avoid any damage to components as well as to avoid too high or too low pressure in the gas train. This could cause high financial losses ...

... Pressure Safety Valve + Rupture Disk is protected and may be utilized autonomously as essential security gadgets or in conjunction. There are 3 possible combinations. The first combinations ...

It"s a Safety valve in according with Directives ATEX 20K/34/EU. Technical Norm Fire Prevention 41/256 31/10/2019. d.P.R. 10/520 19/03/1955 and subsequent amendments.

This range of spring loaded conventional and balanced safety relief valves is specifically designed for overpressure protection of unfired pressure vessel (ASME Section VIII application). ...

130 Series Safety valves are also available as Relief valves. Relief valves, identified by the letter R after the type number, are devices with an operational function, ...

V651 Series safety relief valves are produced as safety and relief type. Safety valves are pressure relief elements used to evacuate excessive pressure ...

PVS type slam shut valves are pilot-operated relief valves in which the opening and the closing of the main plug is controlled by a pilot device which is very ...

The EMERSON BM7 SERIES is a disk slam-shut valve characterized as automatic isolating elements, which are suitable for installation as safety devices in regulating stations. This device has a high operation ...

... control and regulate the gas, air flow to burners and other combustion devices. HMV is a unique safety valve that can be supplied for the requiremen of handling higher ...

Type 50 is a safety valve for universal use. It can be used for nearly any industrial application, e.g. in shipping and pipeline construction, the chemical and petrochemical industries, ...

The RIEGER Safety valve Type SH prevents excessive pressure in steam and gaseous media in plant components and tanks. The set pressure is generally higher than the operating pressure of the system.

... sewage, gas, glycol, diathermic oil, industrial water, steam and other natural and aggressive media, depending on theresistance of materials usedfor the construction ofthe valve.

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One feature you need to learn more about is the tank’s safety relief valve. All propane tanks, including the cylinders you use for your grill, are required by law to have pressure relief devices that allow for the release of excess pressure inside the tank.

The safety relief valve is designed to protect your propane tank from rupturing in case excess pressure builds up in the tank. It is also called a pop-off valve, pressure-venting valve, or a relief valve.

The safety relief valve is kept closed by a very strong spring as long as the pressure inside the tank is at a safe level. If the pressure in the tank reaches the same amount of pressure of the spring, the safety relief valve is opened. If that happens, you’ll hear a hissing sound coming from the tank as pressure is dissipated. In instances where the pressure in the tank is much higher than that of the spring, the valve will fully open. You’ll hear a pop if that occurs.

Once the pressure is down below the pressure of the spring, the valve closes on its own. If the valve pops open, it may need to be replaced. DO NOT attempt to repair or replace this on your own. This job requires a professional. Contact us to help.

That’s why, when we deliver your propane, we fill your tank to 80% full. You may have noticed that and wondered if it was a mistake. It’s intentional. That remaining 20% of space in your tank remains empty so the propane has space to safely expand in warm or hot conditions.

For safe, expert propane tank installation, Boehlke Bottled Gas can’t be beat! Contact us today for your new propane tank. And don’t forget to ask about our reliable propane delivery!

Flow Safe is a manufacturer of spring-operated and pilot-operated high-performance pressure relief devices. The Flow Safe product line is specifically designed for applications in Natural Gas Distribution, Pipeline, Aerospace, Marine, Industrial Gasses and other liquid and gas process applications.

Competitive pricing and deliveries | Products are plug-n-play | Three-year warranty on all products | Custom sizes available | High performance | Low maintenance & little-to-no repairs | Manufactured in the US | Well-stocked inventory

ASME section VIII “UV” stamp | PED “CE” mark | DOT, API | Marine IGC, ABS, BV, DNV-GL, LR | ISO 9001:2015 | Canadian CRN Approval (all provinces/territories)

Due to the continued escalation of raw materials as well as additional COVID-related costs, Flow Safe is announcing a list price increase effective Aug. 2, 2021. The increase will be between 8% and 10% depending on the product line.

NABIC have long been recognised as the industry standard for commercial and industrial safety and relief valves for hot water applications. NABIC products are all UK made with castings from the UK and Europe. NABIC products do not have castings from the far east as with many of its competitors.

Flowstar (UK) Limited (Company Number: 01384915, VAT Number: GB 475 448 317) is the largest worldwide stockist of NABIC safety valves and NABIC relief valves. Our NABIC prices are genuine discounts off the official NABIC list price. We have not increased our prices before discounting as on some websites. If you buy NABIC valves on a regular basis we can offer further discount and will price match were possible.

Shipping: Orders received before 5:00pm on a Monday to Thursday and 4:30pm on a Friday, will be despatched the same day for next working day delivery via Fedex. Timed services i.e. Pre 9am, Pre 10am, Pre 12 noon and Saturday deliveries are available. We can also arrange same day deliveries - please call for pricing.

Payment: We offer credit accounts for registered businesses or can take payment by BAC"s, PayPal, VISA and Mastercard. FREE mainland UK delivery on orders over £400+Vat.

Returns: You need to tell us if you wish to return un-used goods within 14 days of purchase either by phone or email. You then have a further 14 days to return the goods back to us. We aim to process the refund within a few days of receiving them. Please note we charge a 20% restocking fee. This is to cover the work originally carried out setting and testing the valve and also the work we will need to do on its return to get it ready for resale.

Our Flanged Top Valves in Plastic incorporate 150# socket-welded flanges on PVC and CPVC valves, and threaded 150# companion flanges on polypropylene, PVDF, and PTFE valves.

This series includes a standard aluminum metallic top, viton diaphragm, and high pressure spring, with three standard choices of metallic wetted bottom

Our High Temperature series is designed for applications above 140°F / 60°C. Its features include:Temperature limit of this valve is dependent upon body material selection, to a maximum of 300°F (149°C)

Standard body materials available are 316L stainless steel, Alloy 20, or Hastelloy C, all rated to the maximum temperature. Other metallic bodies available upon request.

Option body materials available are CPVC Corzan and PVDF, however these have limited pressure versus temperature ratings, and the factory should be consulted to ensure proper selection

Readily available stainless steel union-style connection for Top Valve ensures ease of installation and removal. Its features include:Available in 2 sizes, ranging from 1/4" to 1/2" NPT or BSPT.

This series features a 316 Stainless Steel body, with a standard CPVC Corzan molded top. 316 Stainless Steel and Aluminum tops available upon request.