FEED CHECK VALVE FOR POWER PLANT USED - ASKPOWERPLANT

FEED CHECK VALVE FOR POWER PLANT USED

FEED CHECK VALVE FOR POWER PLANT USED
BOILER OPERATION
1

FEED CHECK VALVE FOR POWER PLANT USED:-

Today we discuss about the feed check valve features, parts and it’s application.Feed check valve has a disc hangs down in the flow path with a hinge when fluid flow in forward direction ,pressure of the fluid pushes the disc upward allowing the fluid to flow .Reverse flow drops the disc and seals against the seat . So the flow stops in reverse direction. During no flow valve remain is closed position due to its own weight. In some causes weighed levers are used in the feed check valve to assist the closing the valve . Seat of the valve is replaceable. As the disc remains in floating on the fluid normal flow, so pressure drops in this type of check valve.

Here we discussed about the check valve and its parts in details:

Retainer ring: The four-split retainer ring retains the internal pressure and is easily replaced.

Hinge pin: Seal mechanism through hinge pin is the same construction as the pressure seal bonnet.

Seat ring: Renewable and easy to replace stellited faced seat ring is seal welded to minimize distortion from body stress.

Seat surface: Hard faced seat assures long service life, better resistance to heat, corrosion and erosion.

Retainer bolt: Studs establish the initial seal of the pressure seat joint.

Expanded graphite sealing ring: Excellent seal performance at low and high-pressure, even under severe pressure and temperature transients

Art hole: By inserting knockout pin into a drilled hole, the segmental thrust ring can be easily driven out of the retaining groove.

Bonnet pressure seal part: Pressure seal design incorporates a graphite seal which seals tighter as the pressure increases.

Disc nut assembly in check valve : Set screw is used to ensure a secure connection between the hinge and the disc nut. The disc assembly is self aligning and closes in the no flow condition.

Features of feed check valves

Swing check valves opens automatically at normal forward flow and closes at reverse flow.Swing check valves are installed on horizontal pipe line, and can also be installed on the vertical pipe line (upward flow through valve).Due to the property of feed check valve spherical body shape with large radius, swing check valves have low pressure drop and minimize the effect of water hammer by reducing the open angle of the disc in check valves .This design has minimum stress, turbulence and resistance. In feed check valve an inner shaft design is also available The hinge pin is located near check valves in the disc center of gravity, minimizing seat surface radius rotation and velocity.The seat surface is hard faced to prevent wear of the disc seat.Swing check valves are designed to maintain a disc opening angle more than 10 degrees under the minimum flow condition to prevent chattering.Swing check valves have an advantage of light weight, less maintenance and relatively low cost.

Water Hammer:

Water hammer is a pressure surge resulting from a rapid change in flow rate, such as that caused when pipeline valve is suddenly closed. Severe vibration and hammering noise are associated with water hammer phenomenon, which leads to damage to the piping system.

Application of feed check valves:

  • Super heater primary desalt
  • Super heater Secondary desalt
  • Super heater desalt main pipe
  • Warm water pump pipeline
  • Re-heater desalt
  • Separator outlet pipeline nitrogen charge

IF YOU LIKE THIS POST “FEED CHECK VALVE FOR POWER PLANT USED  ” PLEASE LIKE , SHARE AND YOU COMMENTS IS VERY VALUABLE SO PLEASE GIVE YOUR SUGGESTIONS IN COMMENT BOX please read once time if any mistake you find in this artical please suggest me through comment box or if  this website contains all original article which are written by me if any article on this site find copyrighted please inform me through at [email protected]……..THANK’S

Facebook Comments
1 Comment

Leave a Reply

Your email address will not be published. Required fields are marked *

4 MAIN TYPE OF OIL FOR POWER PLANT INDUSTRIES
BOILER OPERATION
4 MAIN TYPE OF OIL FOR POWER PLANT INDUSTRIES

4 MAIN TYPE OF OIL FOR POWER PLANT INDUSTRIES Today we discussed 4  main type of oil for power plant industries used,  in this article, we know about the type of oil used for power generation as well as steam generation for process and also know about their physical characteristics and …

WHAT IS SOOT BLOWING IN BOILER OPERATION
BOILER OPERATION
2
WHAT IS SOOT BLOWING IN BOILER OPERATION & THEIR OPERATION PROCEDURE?

WHAT IS SOOT BLOWING IN BOILER OPERATION & THEIR OPERATION PROCEDURE? One of the important by product of the Combustion of solid fuels is ash. During Combustion some, some of the mineral constituents and compounds can be in a molten or plastic state. The ash constituents can be deposited on …

how to conduct pneumatic test of thermopack heaters
BOILER OPERATION
HOW TO CONDUCT PNEUMATIC TEST OF THERMOPACK BOILER/HEATER

HOW TO CONDUCT PNEUMATIC TEST OF THERMOPACK BOILER/HEATER  Today we discussed about very important topic which is related to thermopack boiler which is how do conduct pneumatic test for thermopack boiler/heaters? Thermopack boiler/ heaters are widely used in process plant now these days because of their great advantage like its …

Translate »