Mart Flow Control Valves

A gate valve has a simple design and can be applied in many low pressure-drop services, which makes it one of the most common valves in use today. Gate valves are designed as full-port valves. This means that the valve port is of the same size as the inner diameter of the connecting pipe. Full-bore gate valve passes the fluid flow without any obstructions to a flow and do not cause a pressure drop in a pipeline. This also allows to clean the pipe using a cleaning pig.
A resilient seated gate valve with a non-rising spindle consists of the following parts:
wedgeductile iron valve bodyseating areastem (spindle)spindle bearingbonnetpacking.The body is the largest element of the gate valve. Since the spindle remains in the valve body during rotation, it allows an economical bonnet construction. The valve bonnet itself is joined to the body with bolts, which allows cleaning and maintenance. As the gate valve closes, the wedge travels down until it presses the valve seat, which would mean a complete shutoff. During the opening the wedge slides towards the upper part of the valve body.
A wedge gate valve construction did not alter a lot for the last 100 years. However, the design of some elements of the gate valve has undergone some modifications. Most of the changes are aimed at increasing the service life of the gate valve, improving the sealing characteristics, using superior quality materials and epoxy coatings for a better corrosion protection. At the same time, the modern gate valve body has a compact sleek design, allowing installations in limited space conditions. There are already 7 generations of Hawle gate valve models which have been developed in the last 70 years.
Based on construction, gate valves for water supply systems can generally be divided into the following types:
By wedge: parallel gate valves and wedge gate valvesBy seat: metal seat or resilient seated gate valvesBy stem: with rising or non-rising stem.
Parallel slide gate valves feature a flat, parallel-faced gate-like closing element, fitting between two parallel seats. The so-called knife gate valve is a type of parallel gate valves.
Wedge gate valves are so called because of a wedge-shaped gate. The wedge has ribs on both sides and is guided by the slots in the gate valve body. The wedge guides serve the following purposes:
to transfer the axial loads imposed on the wedge by the medium to the valve bodyto enable a low-friction movement of the wedge in radial directionto prevent the wedge from rotation while travelling between open/closed valve positions (serving as an anti-twist lock).Most gate valves used in water distribution systems are wedge gate valves.

Wedge gate valves can have metal or resilient seats. In metal seated gate valves, a wedge slides towards a groove in the invert of the gate valve body, which would often trap solids contained in the fluid. For this reason, resilient seated gate valves provide a tighter shut-off and are more preferred in water distribution systems.
In resilient seated gate valves, a wedge, mostly made of ductile iron, is encapsulated in resilient material (elastomer) and therefore provides a tight seal. The seating takes place between the rim of the wedge and the valve body. This does not necessitate a groove at the bottom of the valve. Therefore, resilient seated gate valves can seal around small solids, carried by the water flow. All Hawle gate valves are resilient seated where the valve gate is vulcanized with high-quality elastomer and suitable for application in drinking water supply. For example, in the latest Hawle gate valve model E3 both wedge and the nut are fully coated with elastomer, which allows the highest degree of corrosion protection. We offer a wide variety of connection options for every application.

A Y-type strainer valve is a mechanical device that removes unwanted particles from liquids, gases, or steam using a perforated or wire mesh straining element. Y-type strainers are often used in industries that need constant protection from debris, such as steam, air, water, and oil systems. They are commonly used in steam applications because they can handle high pressure. 
Strainers - Basket & Y Strainers in both Threaded & FlangedThe Y type strainer is widely used for removing dirt and other impurities from pipelines. Such as steam, air, water, and oil systems preventing damage to process-plant, control valves and other equipment. The basket strainer is widely used for removing dirt and impurities from pipelines for liquids.

"Y" Strainer
    "Y" Pattern/ Bolted Bonnet    Size Range: 1/2" to 32"    Class Range: 150# to 600#    Design STD.: BS3532/ ASME B16.34    "Y" Strainer Manufacturer

Additional Information:

• Production Capacity: 1321
• Delivery Time: STD
• Packaging Details: Export worthy

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Type of Gate Valves    Wedge Gate Valve    High Pressure Gate Valve    Knife Gate Valve    Slide Gate Valve    Sluice Valve    Forged Steel Gate Valve
Wedge Gate Valve    OS&Y Gate Valve    Size Range: 2” to 60”    Class Range: 150#, 300#, 600#, 900#, 1500#, 2500#    Design STD.: API600/ API603/ ASME B16.34    Wedge Gate Valve Manufacturer & Exporter

The name suggests there is a gate which perform open/close operation. This part is called wedge. There is variety of design in wadge. The Wedge is perpendicular to the fluid flow. The wedge gate valve is used for fully open and close operation only. It is not suitable for throttled control application. There is two sealing arrangement.

Due to this arrangement, it is called bi-directional wedge gate valve. Between these sealing the wedge allow a tight shut off even metal sealing. The angle of wedge varies according to the parameters of valve. It usually five degrees. If the temperature of the media is not high then the degrees will be 2°52′. These degrees angle wedge is called flexible wedge gate valve. These degrees angle can be removed or be integrated and that type of wedge called solid wedge gate valve.Working principle
The sealing surface are sealed by the media/fluid pressure at the time of fully closed condition. This is the self-sealing arrangement in which the fluid ensure tight sealing by its pressure. This is the technique when valve is fully closed, it is necessary an external force i.e., fluid force apply the force toward the valve seat through wedge. Due to this characteristic the gate valves are widely used in oil & gas for full flow.
High Pressure Gate Valve    Pressure Seal Bonnet    Size Range: 2” to 30”    Class Range: 900# to 2500#    Design STD.: API600/ ASME B16.34    High Pressure Gate Valve Manufacturer
For the high-pressure process industries, the pressure control is always a critical task. The high-pressure seal gate valve solves this problem easily. Mart Valves pressure seal valves are manufactured as per ASME B16.34, API600, international standards. It is a very reliable valves for high pressure industriesi.e., oil & gas, boilers steam pipe-line and many critical applications.It is available for range of Class 900# to Class 4500#.

Operating principal pressure seal gate valve:At the time of assemble of pressure seal gate valve, bonnet alignment should be equal-tightening of bolts by uniformed. This action assures and make the valve to handle the tight-sealing even very high pressure in pipe-line.Whenever the pressure in pipe-line increases, it affected to the bonnet, segment, valve body.This is the auto-tight sealing arrangement in below ways:
    pre-defined seal pressure    Fluid pressure make auto-sealing
To select the right pressure sealing gate valve, pre-load seal pressure should be standard as it is auto-pressurized seal by pipe-line pressure and show good performance of tight shut-off even high-pressure in the pipe-line.

Knife Gate Valve    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. 

Additional Information:

• Production Capacity: 27000
• Delivery Time: Standard
• Packaging Details: Standard

• OS&Y Gate Valve
• Size Range: 2” to 60”
• Class Range: 150#, 300#, 600#, 900#, 1500#, 2500#
• Design STD.: API600/ API603/ ASME B16.34
• Wedge Gate Valve Manufacturer & Exporter

The name suggests there is a gate which perform open/close operation. This part is called wedge. There is variety of design in wadge. The Wedge is perpendicular to the fluid flow. The wedge gate valve is used for fully open and close operation only. It is not suitable for throttled control application. There is two sealing arrangement.

Due to this arrangement, it is called bi-directional wedge gate valve. Between these sealing the wedge allow a tight shut off even metal sealing. The angle of wedge varies according to the parameters of valve. It usually five degrees. If the temperature of the media is not high then the degrees will be 2°52′. These degrees angle wedge is called flexible wedge gate valve. These degrees angle can be removed or be integrated and that type of wedge called solid wedge gate valve.

Wedge Gate Valves are commonly used as on-off and isolation valves in oil, gas, water, sea water and steam lines. They are used.a comprehensive range of Gate Valves in sizes up to 48” (1200 mm) and in ASME classes from 150 to 2500. The valves are offered in combination of size, pressure class, material, End-connection.
FLEXIBLE/Solid wedge
Flanged/Screwed / Socket and Butt weld End connection
By Pass Arrangement for pressure equilisation
Anti Blowout proof Stem
Rising Stem/Non Rising stem
All types of trims as per API 600
Design: API 600 /602/ISO 15761/ASME-B-16.34
F/F: ASME-B-16.10
Testing: API 598/EN-12266
Application Industries1. Ship Building2. Gas Process3. FPSO4. Piping Systems5. Chemicals & Natural Gas6. Power Plants7. Sugar Mills8. Paper & Pulp9. Petrochemicals10. Water11. Oil & gas12. Mining13. Food & Beverage14. Metal & Steel

MARTVALVES is the Exporter and Supplier of Wedge Gate Valve in Italy, Iraq, Korea, Germany, France, Japan, USA, Russia, Brazil, Mexico, Chile, Australia, Indonesia, Philippines, Austria, Africa, Spain, Turkey, Netherlands, UK and across the Entire Globe.

Although both types of valves are capable of controlling liquid flow, wedge valves offer several advantages. If you’re not sure which type is best suited for your application, don’t worry – we can help!
Flow RateA wedge valve has a lower flow rate than its gate valve counterpart due to the sealing wedge being held in place between two slanted seats.Standard gate valves are linear, quarter-turn devices that regulate liquid flow. When opened, they completely block off the fluid path.Wedge valves offer a smaller face-to-face dimension and can be used in numerous applications. Unfortunately, their sealing surfaces tend to erode or scratch quickly, necessitating more frequent maintenance checks.
Flow ResistanceA wedge valve’s flow resistance is lower than that of a gate valve, making it suitable for quickly shutting off liquids. Unfortunately, however, this type of valve may also leak.
When selecting a wedge valve, the type of fluid it will handle is an important factor to consider. Wedge valves typically handle highly viscous fluids, while gate valves work better with less dense liquids.
Typically, a flexible wedge valve is composed of a one-piece disk with an edge cut for improved seat alignment and tighter seals.

Sealing
A gate valve’s wedge-shaped closure member is engineered to provide a high supplementary seating load, making it resistant to both high and low fluid pressures. Furthermore, since only when closed does the wedge come into contact with its seats, this reduces wear and corrosion.

Additional Information:

• Production Capacity: 32000
• Delivery Time: ASAP
• Packaging Details: Standard

Type of Gate Valves

• Wedge Gate Valve
• High Pressure Gate Valve
• Knife Gate Valve
• Slide Gate Valve
• Sluice Valve
• Forged Steel Gate Valve

Wedge Gate Valve

• OS&Y Gate Valve
• Size Range: 2” to 60”
• Class Range: 150#, 300#, 600#, 900#, 1500#, 2500#
• Design STD.: API600/ API603/ ASME B16.34
• Wedge Gate Valve Manufacturer & Exporter

The name suggests there is a gate which perform open/close operation. This part is called wedge. There is variety of design in wadge. The Wedge is perpendicular to the fluid flow. The wedge gate valve is used for fully open and close operation only. It is not suitable for throttled control application. There is two sealing arrangement.

Due to this arrangement, it is called bi-directional wedge gate valve. Between these sealing the wedge allow a tight shut off even metal sealing. The angle of wedge varies according to the parameters of valve. It usually five degrees. If the temperature of the media is not high then the degrees will be 2°52′. These degrees angle wedge is called flexible wedge gate valve. These degrees angle can be removed or be integrated and that type of wedge called solid wedge gate valve.

Working principle

The sealing surface are sealed by the media/fluid pressure at the time of fully closed condition. This is the self-sealing arrangement in which the fluid ensure tight sealing by its pressure. This is the technique when valve is fully closed, it is necessary an external force i.e., fluid force apply the force toward the valve seat through wedge. Due to this characteristic the gate valves are widely used in oil & gas for full flow.

High Pressure Gate Valve

• Pressure Seal Bonnet
• Size Range: 2” to 30”
• Class Range: 900# to 2500#
• Design STD.: API600/ ASME B16.34
• High Pressure Gate Valve Manufacturer

For the high-pressure process industries, the pressure control is always a critical task. The high-pressure seal gate valve solves this problem easily. Mart Valves pressure seal valves are manufactured as per ASME B16.34, API600, international standards. It is a very reliable valves for high pressure industriesi.e., oil & gas, boilers steam pipe-line and many critical applications.It is available for range of Class900 to Class4500.

Operating principal pressure seal gate valve:

At the time of assemble of pressure seal gate valve, bonnet alignment should be equal-tightening of bolts by uniformed. This action assures and make the valve to handle the tight-sealing even very high pressure in pipe-line.Whenever the pressure in pipe-line increases, it affected to the bonnet, segment, valve body.

This is the auto-tight sealing arrangement in below ways:

• pre-defined seal pressure
• Fluid pressure make auto-sealing

 

To select the right pressure sealing gate valve, pre-load seal pressure should be standard as it is auto-pressurized seal by pipe-line pressure and show good performance of tight shut-off even high-pressure in the pipe-line.

A gate valve is the most common valve for water supply systems. It represents a linear-motion isolation valve and has a function to stop or allow the flow. Gate valves got their name from the closure element sliding into the flow stream to provide shutoff and, therefore, acting like a gate. Gate valves are used to isolate specific areas of the water supply network during maintenance, repair works, new installations, as well as to reroute water flow throughout the pipeline.

 

A gate valve has a simple design and can be applied in many low pressure-drop services, which makes it one of the most common valves in use today.