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An instrumentNeedle Valveuses a tapered pin to gradually open a space for fine control of flow. The flow can be controlled and regulated with the use of a spindle. ANeedle Valvehas a relatively small orifice with a long, tapered seat, and aneedle-shaped plunger on the end of a screw, which exactly fits the seat.
Knife Edge Gate Valveis the specific design. This design ensures minimum contact between the parts of the Valve, Reduces the Wear & Tear. The high-performanceKnife Gate Valvesfeature. Non-Sliding Motion, Avoid Sliding Contact between Body & Gate allow flushing of media form the Valve interior. A wide variety of hardened trim options are available on Gate, Seat and Wear Ring. Batten edge of the Gate (Knife-Edge) allows the tight shut off even when solid particles settles at the bottom of the Body.
The valves are regularly used for applications to handle, pulp in pulp mill, slurries, powder such as coal, ash, dry and wet powder in power houses, pneumatic conveying systems, dust collecting systemsand material handling equipments.
For liquid slurries and fiber applications with low-allowable leakage the valves are most commonly used.
Pneumatic, Manual, Gear and Hydraulic equipment devices are provided for operation of the Valves. For elevated mounting, chain driven Valves are also provided.
Our product range covers valves of sizes up to 36 [900mm] and ASME classes up to 150, PN 10 and PN 16. Based on customer requirements, valves in different pressure classes, larger sizes and other materials are also offered. We manufacture this Valve according to MSS SP 81 designing and manufacturing standards.
Butterfly Valves are having variety of applications in Process Industries, Water Treatment, Sewage Plants, Power, Petrochemicals, Steel Plants and allied industries in a very large quantity. All type of Butterfly Valves is available with control type lever, Manual Gear, Pneumatic and Electric Actuators. We offer Butterfly Valves in cryogenic type of design.
A Butterfly Valve is a flow regulating disc valve. According to the BVAA, a Butterfly Valve is a Valve in which the obturator rotates about an axis at right angles to the direction of flow and, in the open position flow passes around the obturator. Butterfly Valves operate similar to Ball Valves in their 90-degree rotation and allow for quick shutoff.
Butterfly Valves have gained popularity over the years due to their thin profile between flanges, making them lighter in weight and creating a smaller install footprint. This compact design also usually makes the initial cost for these Valves lower when compared to other Valve designs. There are different types of Butterfly Valves and each type has unique design features and applications. Each type is defined by the orientation of the stem to the disc and the seating angle that the disc closes on.
Concentric Disc Butterfly Valve is widely used in water treatment and other industries, because of its advantages: light weight, small size and easy for installation, low cost. The most basic butterfly valve design is commonly called a concentric or resilient-seated butterfly valve. In this type of valve, the stem is centered in the middle of the valve disc, which is centered in the pipe bore. This valve typically has a rubber (or resilient) seat and relies on the disc having a high level of contact with the seat to affect a seal.
The valves are provided with integrally moulded elastomer body liner for perfect seating and complete isolation of body material from fluid media. No gaskets are required as the body liner effects a perfect seal between the valve body and the mating pipe flanges. Sealing is provided by preloaded contact between flat seat surface and rounded polished disc hub area. Valves are designed and manufactured as per BS 5155/API 609/AWWA C504. The valves are available for all fluid service requirements with suitable body liner, disc material combinations for up to 210o deg.C in PN6, PN 10, PN 16, ANSI 125 & 150 rating. Other special materials and design are also provided according to the customers requirement.
In a single-offset Butterfly valve, the stem is located behind the disc. There are few, if any, valves of this type left on the market today due to the development of the double-offset, or high- performance, valve. The single-offset of the stem causes the disc to contact the seat with three to four degrees left to travel with the idea that less seat contact will enable the valve to last longer.
Offset Disc Butterfly valves are designed to withstand higher pressure than the concentric disc design. In this design, the disc remains in contact with the seat only during closing of the valve. Due to this design, the seat lasts for longer period than in Concentric Disc design. Offset disc butterfly valves are suitable to replace the sealing element as and when required.
With the triple offset butterfly valve there are three offsets. Two are placed in asimilar position to the double offset butterfly valve, while the third offset is the geometry of the seating surface, creating a type of cone shape of the disc and seat. This cone angle, along with the two eccentric shaft offsets, allows the disc to seal against the seat with no friction.
Triple offsets are generally used in applications similar to gate valves, where a metal seat is required, and tight shutoff and/or quarter turn actuation is desired. Applications like high pressure steam (over 150 PSI), superheated- steam, high temperature gases and oils, high temperature applications are good for this type of valve because a metal seat is required over a soft seat.
The triple offset valve is used in similar industries as the double offset butterfly valve, but in more demanding applications.
We are providing a wide range of Gate Valve such as Rising Stem, Bolted Bonnet, OS & Y Type Jacketed Gate Valve with Flexible Wedge Gate and Seat Rings seal-welded or integral design. Flanged End Gate Valve, Screwed Gate Valve, Butt Weld End Gate Valve, Socket Weld End Valve, our Valves are used widely in a host of Industries. These dimensionally accurate Gate Valve are available at the industry leading prices.
The Gate Valves Body and bonnet Cast with uniform sections, precision machined. Body: Straight through port without recesses except in the seat area Minimum resistance to flow, turbulence and erosion. Flex wedge: Guide slots in the wedge engage with integral guide ribs in the body, Stem-to- wedge contact close to wedge centre Better sealing, smoother operation. Seal-welded Seat Ring Eliminates leakage path between seat ring and body, does not loosen up due to temperature fluctuations or vibration. Stem One-piece construction with forged T-head Long service life, smoother operation.
Designed for high pressure and high temperature applications, for a wide range of fluids except slurries and viscous fluids. These valves are generally used in the wide open or closed position, are not recommended for throttling service because throttling causes disc chattering and vibration which is likely to erode the seating surface and cause leakage. The range comprises valves for cryogenic services, NACE Specifications (MR-01- 75), Position Indicator, Drain plug & Bypass Arrangement.
There are mainly two types of gate Valves the Rising Stem Gate Valve and Non-Rising Stem Gate Valve. Rising stem gate valves have the threads external to the valve body. You can see the valve stem is moving up when the valve is opening. In this way, you can visually keep track of how far the valve is open.
Non-rising stem gate valves have threads that lift the gate are exposed to the fluid being controlled by the valve. This can cause problems if the fluid tends to foul the threads, so non-rising stem valves are usually used on only clean liquids and gases.
Jacketed Gate Valve largely use to sustain process media temperature during process to keep fluids at a lower viscosity to operate valve smoothly. Each Full Jacketed Gate Valve body construction replace by adding minimum one size higher flanges to achieve proper tighten space of bolt and nut.
Steam and Hot Oil Jacketed Gate Valves mostly use in application of Polymer, Bitumen, Liquid Asphalt, Coal tar, Lactam, Highly Viscous Media, Molten Sulphur or Sulphur. All Jacketed Gate Valves have standard Inlet & Outlet connection for Steam or Hot Oil circulation. Jacket connection can be Threaded (BSP / NPT Female) or Flanged End.
Globe Valves are Outside Screw, Rising Stem, Bolted Bonnet Construction, threads are away from the line fluid and easy to lubricate. Globe Valves are generally available with Plug Type Disc, which is designed to give leak tight seating over a long period of in built wear life. Globe valves body seat ring is shoulder type, threaded body seat ring which has large taper area that is for ample seating. Two nos. slots are provided on body seat ring, which is for easy removal for servicing at site. Designed for least possible obstruction to free flow by providing curvature turns in the body thereby minimising stresses & turbulence. The plug & seat-ring are machined and lapped very precisely to get a very tight sealing when valve is closed. Designed and manufactured to the highest standards of quality and, durability.
The seal of Globe Valve is mainly designed to the following two types
A Non-Return Valve allows a medium to flow in only one direction. A Non-Return Valve is fitted to ensure that a medium flow through a pipe in the right direction, where pressure conditions may otherwise cause reversed flow.
A Non-Return Valve can be fitted to ensure that a medium flow through a pipe in the right direction, where pressure conditions may otherwise cause reversed flow. A Non-Return Valve allows a medium to flow in only one direction. The flow through the Non-Return Valve causes a relatively large pressure drop, which has to be taken into account when designing the system.
Non-return valves are e.g. used with mixing loops in heating and cooling systems to ensure proper operation, and with domestic water systems to prevent backflow. There are different types of Non- Return Valves, such as
A Swing Check Valve is normally recommended for use in systems employing Gate Valves because of the low pressure drop across the Valve. In either style, the disk and hinge are suspended from the body by means of a hinge pin. Seating is either metal-to- metal or metal seat to composition disk. Composition disks are usually recommended for services where dirt or other particles may be present in the fluid, where noise is objectionable, or where positive shutoff is required.
The disc in a swing type check valve is unguided as it fully opens or closes. There are many disk and seat designs available, in order to meet the requirements of different applications. The valve allows full, unobstructed flow and automatically closes as pressure decreases. These valves are fully closed when flow reaches zero, in order to prevent backflow. Turbulence and pressure drop in the swing check valve are very low.
The Dual Plate Check Valve is an all-purpose Non-Return Valve that is much stronger, lighter in weight and smaller in size compared to a conventional Swing Check Valve. The Dual Plate Check Valve design is the result of attempts to solve the problems associated with Swing Check Valve and Lift Check Valve. The Dual Plate Check Valve employs two spring-loaded plates hinged on a central hinge pin. When the flow decreases, the plates close by torsion spring action without requiring reverse flow. This design offers the twin advantages of No Water Hammer and Non-Slam simultaneously. All features put together make the Dual Plate Check Valve one of the most efficient design.
Plug Valves seat and plug face are offset from the shaft center line to provide tight shut off and wear resistance. Our Plug Valves have a specially designed plug moving in and out of the seat with minimal contact, resulting in low operating torque. Eccentric Plug Valves are for systems where slurries, grit or solids are present. It is a quarter turn valve allowing cost effective solution with low torque actuation for pump control, shut-off and throttling operation.
Foot Valves are a form of check valve, installed at the bottom of Pump suction line, inside the wet well. Foot valves are an inexpensive way to prime a single centrifugal pump. Since Foot Valves are continually submerged in the wet well and not readily accessible for inspection or repair, it is important to select a Foot Valve of high quality long wearing construction.
These Valves are designed with perfect flat seating for better sealing. With a pressure rating of PN 0.2 these valves are widely used in suction side of pump to avoid flow reversal. Foot Valves often used in water wells, Foot Valves can be used for many systems where a liquid needs to be pumped from a lower level holding area.
A Relief Valve or Pressure Relief Valve (PRV) is a type of Safety Valve used to control or limit the pressure in a system; pressure might otherwise build up and create a process upset, instrument or equipment failure, or fire.
The pressure is relieved by allowing the pressurised fluid to flow from an auxiliary passage out of the system. The relief valve is designed or set to open at a predetermined set pressure to protect pressure vessels and other equipment from being subjected to pressures that exceed their design limits. When the set pressure is exceeded, the relief valve becomes the path of least resistance as the valve is forced open and a portion of the fluid is diverted through the auxiliary route.
