T Type Strainers

T- strainers are a custom fabricated compound strainer designed to remove foreign particles from pipeline. Tee strainers are used where a compact accessible strainer is needed for protection of valves.

Y Type Strainers

Y Strainers are used in application where the number of solids to be removed is small, and where frequent clean - out is not required. A Y- Strainer has the advantage of being able to be installed in either a horizontal or vertical position. However, in both cases, the screening element or "leg" must be on the "downside" of the strainer body so that entrapped solids can be properly collected and held for disposal. A blow down plug on the drain port will allow clean-out without removal of the screen, and without interrupting the process flow.

Basket Strainers

Basket Strainers is in the form of a basket. With a lifting handle, all particulate retained by the screen can be easily removed from top for disposal. They are intended for applications where large amounts of solids particulate are expected and where the clean out will be frequent.

Duplex Strainers

Duplex Strainers are designed for applications where flow cannot be shut down to service the strainer screen. Changeover is accomplished by use of control valves.

Conical / Temporary Strainers

Conical Strainers strainer are temporary Strainers used mostly before startup of a Plant. Use perforated wire – mesh or wedge wire to trap suspended solids from a process stream. Conical strainers are usually installed horizontally in a piping system. Conical strainers are commonly used in pipelines to prevent damage of Gauges, pumps, control valves, Flow meters and other process equipment. Fabricated Conical strainers from 2” to 24” (& larger sizes are available on request) Designed in accordance with ASME Section VIII Div. 1. Conical strainer available in CS, SS304, SS316, Duplex, Super Duplex. Conical strainers are available in both Basket type and Cone Type Temporary Strainers.

Magnetic Strainers

The purpose of a strainer is to remove larger, unwanted suspended particles from a liquid, primarily to protect downstream equipment, like pumps, from damage. They come in a variety of shapes and sizes, depending on the application, but one feature is essential, strainers are designed for easy removal and cleaning.

ASVIN basket or screen can be mesh lined to trap tiny particles in the fluid being strained. However, there are fluids that may contain microscopic metallic filings. The finest mesh will not catch these particles. This can be a problem in applications with parts that have metal to metal contact.

An effective solution to the problem of excessive and premature wear of pump seals, wear rings, bearings, gears, etc., is a magnetic screen assembly. A standard strainer basket or screen is fitted with magnets which are removable for cleaning. They are arranged to create a magnetic field around the interior of the screen or basket. The magnets attract the fine ferrous particles which would pass through the mesh and could damage the downstream equipment.

Magnets can be incorporated into most types of strainers, including y-type, basket, and temporary cone strainers.

Separators are widely used in the chemical and process industries where large volumes of liquid must be separated from gases. They also may be used as a flash or surge tank, or as a scrubber or demister ahead of steam turbines.

Removal of Moisture becomes essential from gases and Steam as it cause of two-phase flow, water hammer, damage to equipment, as well as it affects heat transfer, total heat carrying capacity of the fluid in case of steam.

For effective separation of moisture from Steam, Air and other gases, is the uniquely designed Baffle type of separator. In this separator the incoming fluid hit the baffle and the changing contour and resulting in expanding of volume, moisture gets deposited on the cool Baffle plates to be drained by the natural inclined inner profile of the separator, whereas the Steam / gas gets around the Baffle and out sans moisture, ensuring 95% efficiency, and longer life of equipment.

* The wet steam entered to the separation unit consist of various baffle plates through inlet valve and it strikes baffle plate causes change in directional flow.

* Due to large cross-sectional area, steam experience a sudden enlargement of volume which reduces the drop in velocity.

* Therefore, the heavier water particles get deposited on baffle plates and steam flows around the baffle.

* When the steam impinges on the baffles inside the separator body water particles are separated from the steam flow-path due to change in the momentum.

* The water is collected at the bottom of the separator and can be drained off through the trap assembly fitted at the bottom of the separator after measuring the water level through level sensor.

* Instead of depending on manual draining of the condensate water from the collection chamber, the draining can be automated by installing an appropriate level sensor, This sensor can be side mounted in the water chamber as a high level detector and the switched output can be used to control solenoid valves to drain the water from the chamber effectively.

Steam passes from the boiler into the steam mains. Initially the pipe work is cold and heat is transferred from the steam. When steam from the boiler to steam mains and to the distribution system, it will again give up energy by warming up the equipment and by continuing to transfer heat to the process. As steam loses heat, it turns back into water. The condensate, which tends to run to the bottom of the pipe, is carried along with the steam flow. This must be removed from the lowest points in the distribution pipe work as the Condensate does not transmit heat effectively, accumulated condensate can cause noisy and water hammer. A device known as a steam trap is used to release condensate from the pipe work without discharging steam.

There are several types of steam traps. The general identification for Steam trap: “TD” for thermodynamic, “TS” for thermostatic, “FT” for float + thermostatic and “IB” for inverted bucket. Thermodynamic traps have a disk situated on a central orifice. As condensate pressure builds, it lifts the disk, passes through the orifice at the center of the disk and exits through smaller orifices surrounding the disk. Flash steam builds up pressure on top of the disk and closes the orifice. Condensate is discharged intermittently.

Thermostatic traps operate on the difference in temperature between steam and condensate. As condensate cools, the volume of an enclosed bellows decreases and the discharge valve opens. Thermostatic traps always cause some condensate to remain in the system. Condensate is discharged continuously.

In Float and Thermostatic traps, condensate is discharged when the rising level of condensate lifts a float attached to a level. A thermostatically operated vent discharges air from the top of the trap. Float and Thermostatic Traps have superior gas removal characteristics. Condensate is discharged continuously.

In inverted bucket traps, steam is contained within an inverted bucket floating in condensate. As the level of condensate rises, it is discharged. Inverted bucket traps require water within the bucket, called the prime, to operate. This trap is good for distribution systems. Condensate is discharged intermittently.

Air Traps Remove condensate from compressed air. In today's world of automation, compressed air is used in many industries including high- precision machinery and instrumentation. After air is compressed, it is cooled by an after-cooler or in a receiver tank, where condensate is formed from water droplets in the air.

This condensate also occurs in compressed air distribution piping, leading to rust and fluctuation in high-precision machinery, as well as causing a reduction in product quality.

ASVIN air traps protect your equipment and products by discharging condensate automatically.

Types Of Pressure Temperature Reduction Units

• PRS Station
  In which pressure reduction is done, is termed "Pressure Reduction Station"
• DSH Station
  In which temperature reduction is done, is termed "De-Superheating Station"
• PRDS Station
  Both units combined, termed Pressure "Reduction cum De-Superheating Station"

Pressure Reduction Station - PRS

The steam inlet pressure gauge and dial thermometer indicate the pressure and temperature respectively of the inlet steam. The Pressure Reducing Valve (PRV) reduces the pressure of the steam. The steam inlet isolation valve along with the outlet isolation valve is used to isolate the Pressure Reducing Valve, whenever maintenance of the PRV is to be carried out.

The pressure transmitter senses the outlet steam pressure and gives a proportional current signal as output to the PID controller. The PID controller then compares the measured value with a set point, The safety valve opens and relieves excess pressure when steam pressure goes above set value.

• All Piping / SRV / PRV are precisely Sized with Sizing Selection Programme for Accurate Controlled Performance.


• Complete PRS is in house Fabricated with high skill IBR approved welder with seamless pipes, fittings and flanges with bypass line dully assembled and finally tested and certified by TPI, if required.


• Hydro Testing of PRS and Final Pressure setting is done with air before dispatch.It is Recommend to Provide External Balance Pipe when the Reduced Pressure is Below 55% of the Inlet Pressure

De-Superheating Station - DSH

De-superheating systems are designed to reduce the temperature of superheated steam close to that of saturation. The steam temperature is reduced close to saturation by injecting water into high velocity steam by controlled water flow through water control valve.

The spray water enters the DSH station. The water strainer at the inlet prevents entry of foreign particles into the water control valve & de-superheater spray nozzles. The water inlet pressure gauge indicates the pressure of the spray water. The water flow control valve regulates the quantity of the spray water going into the spray nozzles, depending on the steam load. The temperature transmitter senses the outlet steam temperature and gives a proportional current signal as output to the PID controller. The PID controller then compares the measured value with a set point.

Reduction cum De-Superheating Station - PRDS

ASVIN can supply Pressure Reducing and de-superheating stations for whichever application regardless its criticality and dimension.

• Minimum sizes available: 15 NB to higher size as per design requirement
• Available pressure rating:
• Class 150-600 Lbs (normally flanged ends)
• Class 900-2500 Lbs (normally BW ends)
• All stations are engineered and factory assembled
• Stations are mostly supplied with ‘Combined PRDS’ Valves which provide the advantage of pressure reduction and temperature control in a single unit
• The water flow Control Valve and waterline are offered with the steam line, which ensures correct design and matching of pressure and temperature control stations
• The entire assembly is hydro tested
• Stations are available in various sizes from 25 NB up to 1500 NB or larger

Pipe materials

• A106 Gr.B with flanges A105/A515 for temp. Up to 427°C
• A335 P11 with flanges A182 F11 for temp. above 427°C and below 493°C
• A335 P22 with flanges A182 F22 for temp. above 493°C