Mart Flow Control Valves

Safety Relief Valves / Pressure Relief Valves

The main characteristics of a safety valve is to guardthe property and life. The Safety valves should be installed wherever the maximum allowable working pressure of a system or pressure containing vessel is likely to be exceeded, in particular under fault conditions due to the failure of another piece of equipment in the system.

The term “Safety Valve” and “Relief Valve” are general terms to define a variety of pressure relief devices. A wide range is available based on the application and required performance criteria. The different designs are required to meet numerous national standards.

Pressure excess can be generated in a number of different ways as follow:

• Failure of a cooling system allowing vapour or fluid to expand
• Compressed air or electrical power failure to control instrumentation
• Plant fires
• During the start-up conditions of a plant

Characteristics:

• Compliance with API 526
• Diverse selection of high-alloy materials available as standard
• Extendedperiod due to hardened discs, partly stellited seats and integrated shielding
• Single trim: Equal internal parts for cost-effective maintenance
• Surpasses the tightness requirements of API 527 by 50%

Pressure Relief valves

A pressure Relief Valve is a safety device designed to protect a pressurized vessel or system during an overpressure event.
An overpressure event refers to any condition which would cause pressure in a vessel or system to increase beyond the specified design pressure or maximum allowable working pressure (MAWP).

The primary purpose of a pressure Relief Valve is protection of life and property by venting fluid from an overpressurized vessel.

Many electronic, pneumatic and hydraulic systems exist today to control fluid system variables, such as pressure, temperature and flow. Each of these systems requires a power source of some type, such as electricity or compressed air in order to operate. A pressure Relief Valve must be capable of operating at all times, especially during a period of power failure when system controls are nonfunctional. The sole source of power for the pressure Relief Valve, therefore, is the process fluid.

Once a condition occurs that causes the pressure in a system or vessel to increase to a dangerous level, the pressure Relief Valve may be the only device remaining to prevent a catastrophic failure. Since reliability is directly related to the complexity of the device, it is important that the design of the pressure Relief Valve be as simple as possible.

The pressure Relief Valve must open at a predetermined set pressure, flow a rated capacity at a specified overpressure, and close when the system pressure has returned to a safe level. Pressure Relief Valves must be designed with materials compatible with many process fluids from simple air and water to the most corrosive media. They must also be designed to operate in a consistently smooth and stable manner on a variety of fluids and fluid phases.

Spring Loaded Pressure Relief Valve

The basic spring loaded pressure Relief Valve has been developed to meet the need for a simple, reliable, system actuated device to provide overpressure protection.

The image on the right shows the construction of a spring loaded pressure Relief Valve.

The Valve consists of a Valve inlet or nozzle mounted on the pressurized system, a disc held against the nozzle to prevent flow under normal system operating conditions, a spring to hold the disc closed, and a body/Bonnet to contain the operating elements. The spring load is adjustable to vary the pressure at which the Valve will open.

Additional Information:

• Production Capacity: Standard
• Delivery Time: TBD
• Packaging Details: Export worthty

Type of Globe Valves    Flange Globe Valves    High Pressure Globe Valves    Bellow Seal Globe Valves    Forged Steel Globe Valves    Angle Globe Valves    Globe Check Valves    Three-Way Globe Valves


Flange Globe Valves

• Swivel Plug Disc
• Size Range: 2" to 24"
• Pressure Range: 150# to 2500#
• Design STD.: API 600/ ASME B16.34
• Flange Globe Valve Manufacturer

The disc of globe valves moves along the centreline of the seat. These valves generally used for the modulating to flow. This is happened because of change of the stroke of valve flap proportional to seat port. Due to small change of stem stroke, it shows smooth control that is the reason globe valve widely used to regulate the flow. Thus, the globe valve is more suitable for shutting-off or regulating and throttling.

The working principle and characteristics of the globe valve:

The globe valve allows tight shut-off and smooth regulating of the flow. There is a torque applied via stem on valve seat area. This torque varies as per required flow so the valve used for application where flow regulating or zero leakage required.It is easy in manufacturing, assembly and maintenance.

High Pressure Globe Valves

• Globe Valve
• Pressure Seal Bonnet
• Size Range: 2" to 24"
• Class Range: 900# to 2500#
• Design STD.: API600/ ASME B16.34
• High Pressure Globe Valve Manufacturer

The stem extends toward the end of the disk from the bonnet in the high-pressure globe valve. In this operation condition a sealing ring parallel to the shape of the gap is provided in the annular gap formed between the cone of the inverted cone on the stuffing box, the inner hole of the valve body and the bonnet face the end face of the high-pressure globe valve. In this mechanism the use of the pressure of the liquid medium itself to achieve the purpose of sealing, the greater the pressure, the larger the sealing force, the more reliable the sealing, making it a pressure seal globe valve.The sealing performance is very good under high pressure and temperature condition even if fluctuation is noted. Compared with the forced sealing, it does not require a large bolt preload.

The main features of the high-pressure globe valve:

• Temperature range: -40℃– 550℃
• Body material: carbon steel, stainless steel (Also other material available on request)
• Stem material: stainless steel
• Packing: flexible graphite, reinforced Teflon
• Connection: flange, butt welding
• Suitable media: water, steam, oil, etc.

Bellow Seal Globe Valves

• Globe Valve
• Low Fugitive Emission
• Size Range: DN15 to DN500
• Class Range: PN10 to PN40, 150# to 600#
• Design STD.: EN558-1
• Bellow Seal Globe Valve Manufacturer

To handle the hazardous fluids, the industries use a Bellows sealed Valve. It is a specially designed valve suitable for use such industries. The bellows sealed valves does not allow any leakage. In the era of chemical and nuclear industries, there are extremely poisonous and toxic media flowing through the pipeline. It may cause very high loss of money and casualty of life. So, the pressure sealed valves are used in such pipes and systems have specific stringent leakage and sealing requirements.The bellow seal globe valves are the necessities of a completely different & desired sealing.

Forged Steel Globe Valves

• Forge Valve
• Size Range: 1/2" to 4"
• Pressure Range: 150# to 2500#
• Design STD.: API602
• Test STD.: API598
• Forged Steel Globe Valve Manufacturer

Additional Information:

• Item Code: MGC5
• Production Capacity: 21000
• Delivery Time: Standard
• Packaging Details: Export worthy

Pneumatic Diaphragm Control Valve
Our extensive range of control valves are developed using premium quality raw material as per latest industrial norms and international standards. Due to their efficient performance and minimum maintenance, demand of this valve is highly growing to fulfil applications such as controlling large flow of water, air, steam, vapour, gas and other media in various industries.
Pneumatic diaphragm control valves are first choice for some of the hygiene focused industries such as pharma, chemical, biotech, petroleum, gas, food and many more. This valve is compact in size and light weight because it consist various base parts like handle, actuator, valve body, diaphragm etc. This option gives you advantage over other valves as it can configured as per need of your process. Pneumatic actuator is made to open valve in normal position. When the pressure of air is increasing in the actuator, valve turns in close position similarly valve turns in open position when actuator release the air.
We are one of the customer centric company, our products are made using high grade raw materials with the latest industrial quality norms and regulations. Moreover our offered ranges of industrial valves are highly appreciated for their quality, durability and performance. Known as one of the top Pneumatic diaphragm control valve supplier, manufacturer and exporter in India, we offer quality products as per customer requirement at best discounted prices.
    Characteristics of Pneumatic Diaphragm Control Valve:    Reliable and long lasting performance (Continuous operation at high temperatures)    Low risk of contamination    Latest design, made of high grade material    Safe, Fast and Reliable actuator made of SS material    Easy installation and wide service network
Pneumatic Diaphragm Operated Control Valve is a type of control valve that uses a diaphragm to control the flow. The diaphragm is installed inside the body of the valve and is controlled by the air pressure. The Pneumatic Diaphragm Valves are easy to install and cost low to install. They also have optimized process designs. The number of welds and valves are low that the system is less complicated. The body of the valve is made up of stainless steel. The material for the body can vary based on the applications requirements and the material that flows inside the valve. There are different sizes and dimensions to the valves and pressure capacities vary with different pressure ratings.
Pneumatic diaphragm valves are able to handle gaseous fluids, liquids, and semisolids media such as colloids, sludge, and brackish water well, and slurries. Pneumatic diaphragm valves are suitable for controlling liquids with some solid particles. Relative to other valves, these valves employ a simple construction design. In pneumatic diaphragm valves, it is rare to find a buildup of biofilms and sediments due to minimum contact on the internal components of the valve. As such, these valves are used in many applications such as pharmaceuticals, food processing, sewage pipelines, water treatment, pulp, and paper production, electronics manufacturing among others. 

What is a pneumatic diaphragm valve? 
A pneumatic diaphragm valve is a type of diaphragm valve that uses a pneumatic actuator. This type of valve uses a flexible diaphragm to control, obstruct, or isolate fluid flow. Pneumatic diaphragm valve manufacturers design the valve such that the diaphragm is used as the element controlling the flow that flexes down or upwards to decrease or increase the rate of fluid flow respectively. The sealing action of a pneumatic diaphragm valve is generated when a diaphragm is pressed on a solid dam in the valve body. Pneumatic diaphragm valves are categorized as linear valves that require linear motion of the elements controlling the flow. 

Additional Information:

• Production Capacity: Standard
• Delivery Time: Standard
• Packaging Details: Standard

Knife gate valves are designed mainly for on-off and isolation services in systems with high content of suspended solids. Knife gate valves are especially beneficial for handling slurry in addition to viscous, corrosive and abrasive media. The valves have a minimised pressure drop in fully open position, they are easy to actuate, they have a relatively low weight and are cost-effective. 
Knife gate valves are designed to work in some of the harshest environments, typically having a sharpened blade to cut through heavy liquids.
They are especially useful in wastewater applications where corrosion is an important issue. So, in addition to the valve design optimised for slurry media, it is beneficial to have a knife made of acid-proof stainless steel as this makes it less susceptible to damages caused by corrosion and as a consequence it needs less frequent maintenance or even replacement.
Knife gate valves should only be used for applications requiring a completely open or completely closed position and should not be used to regulate flow unless they are designed for it. Whenever fluid is forced against a partially closed gate, there will be a vibration, gradually eroding the disc and seat. In addition, the knife gate valves are designed to slowly open and close to safeguard against the impacts of water hammer.
    Slurries    Heavy oils    Non-flammable viscous fluids    Wastewater    Clean water
Double gate bi-directional wafer style knife gate valve for very high consistency or concentration media or fluids knife gate is double gate valve widely used in the Pulp and Paper industry (recycling or secondary fibre processing) designed to handle high concentrated or contaminated media. In open position, both gates retract into the body and allow full flow. When closing, the gates push stock and contaminants as staples, wires... out of the body into the flow.Stroke time is the half of conventional valves.All components subject to wear are replaceable
SizesDN 100 to DN 600 (larger diameters on request)
Working pressureDN 100 to DN 250: 10 barDN 300 to DN 400: 6 barDN 450: 5 barDN 500 to DN 600: 4 bar

• Wafer or Lug or Flange Type
• Round port, V port, Customized square, rectangle port
• Size Range: 2” to 24”
• Pressure Range: 150LB/ PN10 / PN25
• Design STD.: MSS SP-81/ ASME B16.34
• Knife Gate Valve Manufacturer & Supplier

It was the beginning of 20th century, when the paper industries looking for a suitable valve for their pulp & paper. At that time industries seeking a economical valve solution to reduce the cost. At that situation the Knife Gate Valves was introduced. At that time, it was named as Push-Through Knife Gate or Guided Shear Gate valves. The Guided Shear Gate Valves are able to cut through the fluid / pulp like a sharp knife. Knife gate valves are works as on-off and isolation application of pulp fluid. Knife gate valves are very useful when in slurry, abrasive, corrosive, and viscous media. There is a knife in centre which allow full port to flow so the valves have a low-pressure drop in the fully open position. It is simple to operate, light in weight, and most economical than other valves.

The Knife Gate Valves are widely used in the wastewater treatment plants where the corrosion is a major concern. In such application the "Knife" plates are made of stainless steel. Due to this the maintenance expenses and replacement cost effectively reduced. The Knife gate valves are generally used for on/off i.e., fully open or fully closed condition. It is not advisable to use in modulating applications while it is not recommended by an engineer or applications demand.

Additional Information:

• Production Capacity: Standard
• Delivery Time: Standard
• Packaging Details: Standard

Three way globe control valves

Valves are designed for throttling and on-off services. Valves are made suitable.
1) For flow mixing applications 2) For flow diverting applications.

Body with bottom connection construction provides ease for maintenance.

Streamlined flow path provides large flow capacity Variety of Trim options available to satisfy vast application range including reduced port trims enabling nearest accurate selection for precise control requirements.

Trims with large guide plugs are available for full pressure balancing effect providing economical choice for high pressure applications

Valves are available in a variety of material combinations including conformance to NACE MR-01-75.

Option of Hardened trim materials provide excellent wear resistance & longer trim life.

Flow

Mixing

Diverting

Two flows enters into ports A and B and emerges

out from port AB as mixed fluid.

Flow enters into pipe AB & emerges out from port A

 

or B as required.

Valve Sizes and Ratings : 15 mm thru 750 mm NB / 1/2" thru 30" NB (ANSI 150#, 300# and 600#,

Equivalent in BS and DIN)

15 mm thru 100 mm NB / 1/2" thru 4" NB (ANSI 900# and 1500#)

End Connections : Flanged End

Butt Weld End

 

Valve Body MOC : Carbon Steel ASTM A216 Gr. WCB

Alloy Carbon Steel ASTM A217 Gr. WC1, WC6, WC9, C5, C12, A352 LCB, LCC, LC3

Stainless Steel ASTM A351 Gr. CF8, CF8M, CF3, CF3M, CF8C

Alloy Steel Hast 'C', Alloy 20, Nickel, Titanium, Monel, etc

All other Materials available on request.

Trim MOC : Stainless Steel ASTM A479 Type Ss316, SS304, SS316L, SS304L, SS904L

Alloy Steel Hast 'C', Alloy 20, Nickel, Titanium, Monel, etc

 

All other Materials available on request.

Additional Information:

• Production Capacity: Standard
• Delivery Time: TBD
• Packaging Details: Exportworthy

A foot valve is a type of non-return valve, with strainers mounted at the open end of the pump suction pipelines. Foot valves are used when the pump has negative suction. These valves are placed at the pumps wet well. The flow area of the foot valves is larger than the pipe size, so there is only less head-loss. Foot valves are known for their ability to keep the continuous presence of suction within the pump. A foot valve is a special design of the lift check valve. These valves are designed for up-flow and are attached to the bottom of a pump suction pipe. Foot valves can cause leakage, when they are used with fluids that have solids, and they are difficult to service. Foot valves would decrease the net positive suction head available.



Strainers are used to protect the valves it will prevent the accumulation of debris, the debris could jam the foot valve, and it could damage the pump. So strainers are an important part of a foot valve.

The basic function of a foot valve is to prevent water from flowing back down the pipe. It can also be described as a foot valve that would only allow the pump to pull water up but does not allow the water to flow back down.



Most of the foot valves have self-tapping male and female threads for easy installation. Internal balls for quick sealing and valve reaction, and has the flexibility to fit various types of water pump uses, such as well development and volatile organic compounds sampling and purging. Foot valves are cheaper when compared to other valves. Mostly foot valves are made up of heavy-duty cast iron and bronze, as well as PVC. So that they would last longer when submerged in water.


Foot valves can prevent the pump column from draining upon pump shutdown, these valves are widely used in all kinds of pneumatic system. They are used in a suction line of the pipeline as well. Positive sealing action is provided in both low and high pressure without slamming. The foot valve offers spring load closing and can be installed in any direction. Foot valves have low head-loss. Foot valves can maintain hydraulic pressure.



Foot valves are either made of stainless steel or PVC plastic. Foot valves are able to keep the suction continuously in the pump. Because of the larger flow area, the head-loss is very less. Foot valves usually come with surge blocks. Surge blocks will press the valve body so that the residues can be removed and by this, the flow of water would very easy. These valves are expanded by the help of surge block. There are instances where the pressure can actually pop the valve out and causes major leakage, thus it is important to use the right kind of material in the tubing to be able to support the force within the valve.

Most foot valves are fitted with inlet strainer, and they filter the incoming water and prevents the valve damage. Electric pumps are used to pump water from a lower level to higher level and this would require a lot of energy, the could flow back to the source from the higher level to the lower level if the pump is turned off the suction is gone and the water will flow in the reverse direction due to the gravity, it can be prevented by using foot valves. Foot valves are used to prevent the backward flow of water through the pipe when the water pump is turned off, thus the column of the water in the pipe is maintained and all the issues are resolved. A foot valve is a kind of check valve, and they only open in one direction so the foot valves would only allow a unidirectional flow and it will close off when the direction of flow is reversed.



When the pump is turned off the pulling force is removed and water will flow downwards due to the gravitational pull and foot valves blocks the downward flow of water. So the foot valve is a necessary part of the pumping system.

Additional Information:

• Production Capacity: 2100
• Delivery Time: TBD
• Packaging Details: Standard

Micro Pressure Reducing Valve Only for GAS Application