dead weight safety valve factory

Level and Flow Control Engineers manufacturing and exporting Dead Weight Safety Valves which is mainly used in the Power Plants, CPP, Sugar Plants for Low Pressure applications.  Brand Name : Beekay-Made in INDIa

If you rate our Dead Weight Safety Valve on attributes such as ergonomics and operational efficiency, you will find it right there at the top of the class. We have used only the highest quality materials and components in manufacturing our Valve assembly, which exhibits in the performance.  No denying, we are among the leading manufacturers, exporters and suppliers from Chennai, Tamil Nadu.

With wide and rich industrial experience, we are able to offer the best in class Dead Weight Safety Valves. These valves are used in industrial boilers for safety purpose and ensure safety by releasing excess pressure. Provided valve is highly recognized for high performance, requires less maintenance and smooth operations. Our offered safety valve is made available in number of specifications for our clients to choose from. Our valued clients can avail these Dead Weight Safety Valves from us at market leading price.

Design Standardas per API,ANSI,ASME,DIN,BSLFCE manufacturing and exporting dead weight safety valve and pressure relief valves to the process industry. It low cost and high efficiency valves which can work for slurry and high viscosity fluids.

Out side weight can be moved forward and downward to adjust the set pressure. Pressure 0 to 10 bar and size 25NB to 500NB bigger sizes available on request

TemperatureUpto 300 Deg CWe are the manufacturer, and exporter of Dead Weight Safety Valves from Chennai-India to Globally are spring loaded right angled which are used in the pressure vessels, pipelines, and reactors to control the excess pressures. If the pressure exceeds the set point then the valves can open and close automatically as per the pre-settled pressure ratios. Hence the capital equipment is in safe.

To prevent damage to the tank and help ensure safe operations, the Alfa Laval SB Pressure Relief Valve protects a pressurized tank during an overpressure event. It is designed for hygienic processes in the brewery, dairy, food and beverage industries. The valve can be integrated with a SCANDI BREW® tank top system.

The advantages of an integrated Pressure Relief Valve are lower initial costs, superior hygiene and smaller area required for the valve. The size and setting of the Pressure Relief Valve is based on the tank design data and process requirements.

afety valve consists of a valve seat where the pressure in the boiler or pressure vessel when it exceeds the normal working pressure lifts the valve seat with its weight. The excess pressure fluid therefore escapes through the pipe to the atmosphere, until the pressure reaches its normal value. It is the simplest type of safety valve; it is suitable for stationary boilers and pressure vessels only, because it cannot withstand the jerks and vibration of mobile boilers or pressure vessels. Another disadvantage of this valve is the heavy weight required to balance the pressure. Hence, it is not suitable for high pressure boilers.

Sri Venkat Engineers was started in the year 2014, are manufacturing a wide array of Industrial Valves and Strainers. Offered products range consists of Strainer Manufacturer, Industrial Type Valves, and Duplex Type Strainers. In adding to this, these products are applauded by our customers for user-friendly, strong construction, low maintenance, sturdy design, and longer service life. To meet our customers" needs, we bring forth our products with the qualitative configuration in a convenient way.

We have capable professionals who work in close adroitness with clientele to accomplish the demands. Highly experienced employee, they are chosen on the basis of their understanding and work hard to achieve the growth of our organization. Apart from this, industrial valves and strainers offered by us are strictly tested on different parameters in obedience to the set industry norms.

Our mentor Mr. S. Venkatesh maintains friendly relations in the company to undertake bulk orders in a proficient manner. He always guides us to deliver high-quality industrial valves and strainers to the patrons.

As time passed,our sincere perseverance and dedication brought us prolific results and significant presence.Our company rose to being one of the most prominent trading companies in the field of engineering that dealt with the supply of industrial goods like Pipes, Valves, Fittings, Flanges, Pressure & Temperature Gauges etc.

There is a wide range of safety valves available to meet the many different applications and performance criteria demanded by different industries. Furthermore, national standards define many varying types of safety valve.

The ASME standard I and ASME standard VIII for boiler and pressure vessel applications and the ASME/ANSI PTC 25.3 standard for safety valves and relief valves provide the following definition. These standards set performance characteristics as well as defining the different types of safety valves that are used:

ASME I valve - A safety relief valve conforming to the requirements of Section I of the ASME pressure vessel code for boiler applications which will open within 3% overpressure and close within 4%. It will usually feature two blowdown rings, and is identified by a National Board ‘V’ stamp.

ASME VIII valve- A safety relief valve conforming to the requirements of Section VIII of the ASME pressure vessel code for pressure vessel applications which will open within 10% overpressure and close within 7%. Identified by a National Board ‘UV’ stamp.

Full bore safety valve - A safety valve having no protrusions in the bore, and wherein the valve lifts to an extent sufficient for the minimum area at any section, at or below the seat, to become the controlling orifice.

Conventional safety relief valve -The spring housing is vented to the discharge side, hence operational characteristics are directly affected by changes in the backpressure to the valve.

Balanced safety relief valve -A balanced valve incorporates a means of minimising the effect of backpressure on the operational characteristics of the valve.

Pilot operated pressure relief valve -The major relieving device is combined with, and is controlled by, a self-actuated auxiliary pressure relief device.

Power-actuated safety relief valve - A pressure relief valve in which the major pressure relieving device is combined with, and controlled by, a device requiring an external source of energy.

Standard safety valve - A valve which, following opening, reaches the degree of lift necessary for the mass flowrate to be discharged within a pressure rise of not more than 10%. (The valve is characterised by a pop type action and is sometimes known as high lift).

Full lift (Vollhub) safety valve -A safety valve which, after commencement of lift, opens rapidly within a 5% pressure rise up to the full lift as limited by the design. The amount of lift up to the rapid opening (proportional range) shall not be more than 20%.

Direct loaded safety valve -A safety valve in which the opening force underneath the valve disc is opposed by a closing force such as a spring or a weight.

Proportional safety valve - A safety valve which opens more or less steadily in relation to the increase in pressure. Sudden opening within a 10% lift range will not occur without pressure increase. Following opening within a pressure of not more than 10%, these safety valves achieve the lift necessary for the mass flow to be discharged.

Diaphragm safety valve -A direct loaded safety valve wherein linear moving and rotating elements and springs are protected against the effects of the fluid by a diaphragm

Bellows safety valve - A direct loaded safety valve wherein sliding and (partially or fully) rotating elements and springs are protected against the effects of the fluids by a bellows. The bellows may be of such a design that it compensates for influences of backpressure.

Controlled safety valve - Consists of a main valve and a control device. It also includes direct acting safety valves with supplementary loading in which, until the set pressure is reached, an additional force increases the closing force.

Safety valve - A safety 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. Note; the valve can be characterised either by pop action (rapid opening) or by opening in proportion (not necessarily linear) to the increase in pressure over the set pressure.

Direct loaded safety valve -A safety valve in which the loading due to the fluid pressure underneath the valve disc is opposed only by a direct mechanical loading device such as a weight, lever and weight, or a spring.

Assisted safety valve -A safety valve which by means of a powered assistance mechanism, may additionally be lifted at a pressure lower than the set pressure and will, even in the event of a failure of the assistance mechanism, comply with all the requirements for safety valves given in the standard.

Supplementary loaded safety valve - A safety valve that has, until the pressure at the inlet to the safety valve reaches the set pressure, an additional force, which increases the sealing force.

Note; this additional force (supplementary load), which may be provided by means of an extraneous power source, is reliably released when the pressure at the inlet of the safety valve reaches the set pressure. The amount of supplementary loading is so arranged that if such supplementary loading is not released, the safety valve will attain its certified discharge capacity at a pressure not greater than 1.1 times the maximum allowable pressure of the equipment to be protected.

Pilot operated safety valve -A safety valve, the operation of which is initiated and controlled by the fluid discharged from a pilot valve, which is itself, a direct loaded safety valve subject to the requirement of the standard.

The common characteristic shared between the definitions of conventional safety valves in the different standards, is that their operational characteristics are affected by any backpressure in the discharge system. It is important to note that the total backpressure is generated from two components; superimposed backpressure and the built-up backpressure:

Subsequently, in a conventional safety valve, only the superimposed backpressure will affect the opening characteristic and set value, but the combined backpressure will alter the blowdown characteristic and re-seat value.

The ASME/ANSI standard makes the further classification that conventional valves have a spring housing that is vented to the discharge side of the valve. If the spring housing is vented to the atmosphere, any superimposed backpressure will still affect the operational characteristics. Thiscan be seen from Figure 9.2.1, which shows schematic diagrams of valves whose spring housings are vented to the discharge side of the valve and to the atmosphere.

By considering the forces acting on the disc (with area AD), it can be seen that the required opening force (equivalent to the product of inlet pressure (PV) and the nozzle area (AN)) is the sum of the spring force (FS) and the force due to the backpressure (PB) acting on the top and bottom of the disc. In the case of a spring housing vented to the discharge side of the valve (an ASME conventional safety relief valve, see Figure 9.2.1 (a)), the required opening force is:

In both cases, if a significant superimposed backpressure exists, its effects on the set pressure need to be considered when designing a safety valve system.

Once the valve starts to open, the effects of built-up backpressure also have to be taken into account. For a conventional safety valve with the spring housing vented to the discharge side of the valve, see Figure 9.2.1 (a), the effect of built-up backpressure can be determined by considering Equation 9.2.1 and by noting that once the valve starts to open, the inlet pressure is the sum of the set pressure, PS, and the overpressure, PO.

In both cases, if a significant superimposed backpressure exists, its effects on the set pressure need to be considered when designing a safety valve system.

Once the valve starts to open, the effects of built-up backpressure also have to be taken into account. For a conventional safety valve with the spring housing vented to the discharge side of the valve, see Figure 9.2.1 (a), the effect of built-up backpressure can be determined by considering Equation 9.2.1 and by noting that once the valve starts to open, the inlet pressure is the sum of the set pressure, PS, and the overpressure, PO.

Balanced safety valves are those that incorporate a means of eliminating the effects of backpressure. There are two basic designs that can be used to achieve this:

Although there are several variations of the piston valve, they generally consist of a piston type disc whose movement is constrained by a vented guide. The area of the top face of the piston, AP, and the nozzle seat area, AN, are designed to be equal. This means that the effective area of both the top and bottom surfaces of the disc exposed to the backpressure are equal, and therefore any additional forces are balanced. In addition, the spring bonnet is vented such that the top face of the piston is subjected to atmospheric pressure, as shown in Figure 9.2.2.

The bellows arrangement prevents backpressure acting on the upper side of the disc within the area of the bellows. The disc area extending beyond the bellows and the opposing disc area are equal, and so the forces acting on the disc are balanced, and the backpressure has little effect on the valve opening pressure.

Bellows failure is an important concern when using a bellows balanced safety valve, as this may affect the set pressure and capacity of the valve. It is important, therefore, that there is some mechanism for detecting any uncharacteristic fluid flow through the bellows vents. In addition, some bellows balanced safety valves include an auxiliary piston that is used to overcome the effects of backpressure in the case of bellows failure. This type of safety valve is usually only used on critical applications in the oil and petrochemical industries.

Since balanced pressure relief valves are typically more expensive than their unbalanced counterparts, they are commonly only used where high pressure manifolds are unavoidable, or in critical applications where a very precise set pressure or blowdown is required.

This type of safety valve uses the flowing medium itself, through a pilot valve, to apply the closing force on the safety valve disc. The pilot valve is itself a small safety valve.

The diaphragm type is typically only available for low pressure applications and it produces a proportional type action, characteristic of relief valves used in liquid systems. They are therefore of little use in steam systems, consequently, they will not be considered in this text.

The piston type valve consists of a main valve, which uses a piston shaped closing device (or obturator), and an external pilot valve. Figure 9.2.4 shows a diagram of a typical piston type, pilot operated safety valve.

The piston and seating arrangement incorporated in the main valve is designed so that the bottom area of the piston, exposed to the inlet fluid, is less than the area of the top of the piston. As both ends of the piston are exposed to the fluid at the same pressure, this means that under normal system operating conditions, the closing force, resulting from the larger top area, is greater than the inlet force. The resultant downward force therefore holds the piston firmly on its seat.

If the inlet pressure were to rise, the net closing force on the piston also increases, ensuring that a tight shut-off is continually maintained. However, when the inlet pressure reaches the set pressure, the pilot valve will pop open to release the fluid pressure above the piston. With much less fluid pressure acting on the upper surface of the piston, the inlet pressure generates a net upwards force and the piston will leave its seat. This causes the main valve to pop open, allowing the process fluid to be discharged.

When the inlet pressure has been sufficiently reduced, the pilot valve will reclose, preventing the further release of fluid from the top of the piston, thereby re-establishing the net downward force, and causing the piston to reseat.

Pilot operated safety valves offer good overpressure and blowdown performance (a blowdown of 2% is attainable). For this reason, they are used where a narrow margin is required between the set pressure and the system operating pressure. Pilot operated valves are also available in much larger sizes, making them the preferred type of safety valve for larger capacities.

One of the main concerns with pilot operated safety valves is that the small bore, pilot connecting pipes are susceptible to blockage by foreign matter, or due to the collection of condensate in these pipes. This can lead to the failure of the valve, either in the open or closed position, depending on where the blockage occurs.

The terms full lift, high lift and low lift refer to the amount of travel the disc undergoes as it moves from its closed position to the position required to produce the certified discharge capacity, and how this affects the discharge capacity of the valve.

A full lift safety valve is one in which the disc lifts sufficiently, so that the curtain area no longer influences the discharge area. The discharge area, and therefore the capacity of the valve are subsequently determined by the bore area. This occurs when the disc lifts a distance of at least a quarter of the bore diameter. A full lift conventional safety valve is often the best choice for general steam applications.

The disc of a high lift safety valve lifts a distance of at least 1/12th of the bore diameter. This means that the curtain area, and ultimately the position of the disc, determines the discharge area. The discharge capacities of high lift valves tend to be significantly lower than those of full lift valves, and for a given discharge capacity, it is usually possible to select a full lift valve that has a nominal size several times smaller than a corresponding high lift valve, which usually incurs cost advantages.Furthermore, high lift valves tend to be used on compressible fluids where their action is more proportional.

In low lift valves, the disc only lifts a distance of 1/24th of the bore diameter. The discharge area is determined entirely by the position of the disc, and since the disc only lifts a small amount, the capacities tend to be much lower than those of full or high lift valves.

Except when safety valves are discharging, the only parts that are wetted by the process fluid are the inlet tract (nozzle) and the disc. Since safety valves operate infrequently under normal conditions, all other components can be manufactured from standard materials for most applications. There are however several exceptions, in which case, special materials have to be used, these include:

Cast steel -Commonly used on higher pressure valves (up to 40 bar g). Process type valves are usually made from a cast steel body with an austenitic full nozzle type construction.

For all safety valves, it is important that moving parts, particularly the spindle and guides are made from materials that will not easily degrade or corrode. As seats and discs are constantly in contact with the process fluid, they must be able to resist the effects of erosion and corrosion.

The spring is a critical element of the safety valve and must provide reliable performance within the required parameters. Standard safety valves will typically use carbon steel for moderate temperatures. Tungsten steel is used for higher temperature, non-corrosive applications, and stainless steel is used for corrosive or clean steam duty. For sour gas and high temperature applications, often special materials such as monel, hastelloy and ‘inconel’ are used.

Standard safety valves are generally fitted with an easing lever, which enables the valve to be lifted manually in order to ensure that it is operational at pressures in excess of 75% of set pressure. This is usually done as part of routine safety checks, or during maintenance to prevent seizing. The fitting of a lever is usually a requirement of national standards and insurance companies for steam and hot water applications. For example, the ASME Boiler and Pressure Vessel Code states that pressure relief valves must be fitted with a lever if they are to be used on air, water over 60°C, and steam.

A test gag (Figure 9.2.7) may be used to prevent the valve from opening at the set pressure during hydraulic testing when commissioning a system. Once tested, the gag screw is removed and replaced with a short blanking plug before the valve is placed in service.

The amount of fluid depends on the particular design of safety valve. If emission of this fluid into the atmosphere is acceptable, the spring housing may be vented to the atmosphere – an open bonnet. This is usually advantageous when the safety valve is used on high temperature fluids or for boiler applications as, otherwise, high temperatures can relax the spring, altering the set pressure of the valve. However, using an open bonnet exposes the valve spring and internals to environmental conditions, which can lead to damage and corrosion of the spring.

When the fluid must be completely contained by the safety valve (and the discharge system), it is necessary to use a closed bonnet, which is not vented to the atmosphere. This type of spring enclosure is almost universally used for small screwed valves and, it is becoming increasingly common on many valve ranges since, particularly on steam, discharge of the fluid could be hazardous to personnel.

Some safety valves, most commonly those used for water applications, incorporate a flexible diaphragm or bellows to isolate the safety valve spring and upper chamber from the process fluid, (see Figure 9.2.9).

We LFCE are manufacture and Exporter of BeeKay Pressure Relief Valves globally which is used to release the excess pressure in the tanks and vessels to prevent from explosions.

Our Safety valve, Safety Relief Valve, Dead Weight Safety Valves are most accurate in Set pressure Opening and Re-Setting within 5% to 10% of Accumulation and Blow Down.

We are the manufacturer, supplier and exporter of Breather Valves from Chennai-India to Globally are extensively used for automatic venting and for conservation of losses due to evaporation. Breather valves minimizes the risk of fire, explosion and collapsing of tank by relieving automatically the dangerous pressure and vacuum occurring in the tank due to any reason. Products are mainly used in the low pressure tanks and vessels.

We are the manufacturer, supplier and exporter of Pressure Relief Valves from Chennai-India to Globally are spring loaded right angled which are used in the pressure vessels, pipelines and reactors to control the excess pressures. If the pressure is exceed the set point then the valves can open and close automatically as per the pre-settled pressure ratios. Hence the capital equipment are in safe.

We are the manufacturer, supplier and exporter of Safety Valves from Chennai-India to Globally. Used for controlling excess pressures, their precision construction standards make them extensively used in equipment like pressure vessels, pipelines & reactors.

We are the manufacturer, supplier and exporter of Gauge Glass Valves from Chennai-India to Globally and cocks for the sake of market demands. Gauge glass valves are widely used across the industries because it is a convenient tool to visually monitor the liquid level in tanks. Its rigid construction produces corrosion resistance and its compact design permits it to be safely located close to the tank. Our skilled workforce is capable enough to customize as per client"s requirements.

We are the manufacturer, supplier and exporter of SafetyRelief Valvefrom Chennai-India to Globally are spring loaded-right angled which are used in the pressure vessels, pipelines, and reactors to control the excess pressures. If the pressure exceeds the set point then the safety and relief valves can open and close automatically as per the pre-settled pressure ratios. Hence the capital equipment are in safe.

We are the manufacturer, supplier and exporter of Tank Breather Valve. Spring Loaded-right angled safety valves & safety relief valves in Chennai and India. Used for controlling excess pressures, their precision construction standards make them extensively used in equipment like pressure vessels, pipelines & reactors.

We are the manufacturer, supplier and exporter of Vacuum Relief Valve from Chennai-India to Globally. Clients in a wide range of spring loaded-right angled safety valves & safety relief valves. Used for controlling excess pressures, their precision construction standards make them extensively used in equipment like pressure vessels, pipelines & reactors.

We are the manufacturer, supplier and exporter of SafetyRelief Valves from Chennai-India to Globally are spring loaded-right angled which are used in the pressure vessels, pipelines, and reactors to control the excess pressures. If the pressure exceeds the set point then the safety and relief valves can open and close automatically as per the pre-settled pressure ratios. Hence the capital equipment are in safe.

We are manufacturer and exporter of Pressure Relief Valve, Safety Valves, Pressure cum Vaccum Relief Valves, Vaccum Relief Valves. Our range of Products are mainly exported to Europe and South Asian Countries and Gulf Countries. Pressure Relief Valve is mainly used in the Pressure Vessels, Boilers, Pipelines, and Other Big Storage Tanks. If the Pressure is exceed the limit. Valve automatically open and reset for the related pressure.

We are the manufacturer, supplier and exporter of Pressure Relief Valves from Chennai-India to Globally are spring loaded right angled which are used in the pressure vessels, pipelines and reactors to control the excess pressures. If the pressure is exceed the set point then the valves can open and close automatically as per the pre-settled pressure ratios. Hence the capital equipment are in safe.

LEVEL AND FLOW CONTROL ENGINEERS manufacturing and Exporting Safety Relief Valve under the Brand name of BEEKAY - Made in INDIA which is well know in the process industry. Safety Relief Valves are used in the Pipe lines, Pumps, Compressor, Boiler, Tanks, Reactors.

LFCE manufacturing, supplying and exporting Dead Weight Safety Valve and Safety Relief Valves under brand name BEEKAY. Dead weight safety valve is most suitable for Low Pressures and slurry, high viscosity applications. Set Pressures are adjustable very easy by moving weight front and back.

Level and Flow Control Engineers Manufacturing Dead Weight Safety Valve and Safety Relief Valves as per API standards which is meant for Low Pressure applications. Cost effective and easy pressure adjustments without opening of the valve. Weight will be adjusted thro the Lever.

LEVEL AND FLOW manufacturing and exporting Air Valves are designed to withstand vibrations, therefore it is unaffected by any external vibrations. Valve finds application of automatic venting of air in large size water distribution pipes (e.g. distribution manifolds in the central system) and in all cases where it is necessary to eliminate large quantities of air from the system. Valve opening and closing is determined by the float movement (up-down). When there is air in the Pipeline (or) in the Capital Equipments, the force of the float weight acts on the lever which is integral with the plug, thus causing it to move down. In such situation the seat is free and allows the air to be vented outside. Due to this the Pipeline or the capital equipment is safe without any airlocks.

We are the manufacturer, supplier and exporter of Direct mechanical lever operated Ball Float Valves from Chennai-India to Globally, single or double ported in C.I.,C.S., and SS, non metallic constructions operating mechanism is specially designed to be mounted on all types of tank equipment and serves the purpose of a liquid level controlling. Automatic filling and maintaining is done at the said levels.

Clients in a wide range of spring loaded-right angled safety valves & safety relief valves. Used for controlling excess pressures, their precision construction standards make them extensively used in equipment like pressure vessels, pipelines & reactors.

We are the manufacturer, supplier and exporter of Ball Float Valve in Chennai-India to Globally is a cost effective level control device for water or non hazardous liquids. The ball float valves may be mounted inside the tank.

We are the manufacturer, and exporter of Dead Weight Safety Valves from Chennai-India to Globally are spring loaded right angled which are used in the pressure vessels, pipelines and reactors to control the excess pressures. If the pressure is exceed the set point then the valves can open and close automatically as per the pre-settled pressure ratios. Hence the capital equipment are in safe. We are majorly looking inquiries from Dubai, Abu Dhabi, Sharjah, UAE, Kuwait, Oman, Qatar, Egypt, Thailand, Indonesia, Singapore, Malaysia, Myanmar, Vietnam, Brunei, Australia, Europe, Italy, Belgium.