كتاب الصمامات Valves

A valve is a mechanical device that controls the flow of fluid and pressure within a system or process. A valve controls system or process fluid flow and pressure by performing any of the following functions:

  • Stopping and starting fluid flow.
  • Varying (throttling) the amount of fluid flow.
  • Controlling the direction of fluid flow.
  • Regulating downstream system or process pressure.
  • Relieving component or piping over pressure.

There are many valve designs and types that satisfy one or more of the functions identified above. A multitude of valve types and designs safely accommodate a wide variety of industrial applications.

 


 

INDEX

(3)Valves Basic Parts :

       (Body, Bonnet, Disk and Seat, Stem, Actuator, Packing)

(9)Valves Classification:

  (9)   By Mechanical Motion: (Linear, Rotary, Quarter Turn)

  (11)By Size: (Small, Large)

  (11)By Pressure, Temperature Rating:(Cold, NFPA, Steam

                                             Pressure, Multi Rating)

  (13)By Main Function:

                      (13) Isolation: Isolating Valves.

                      (14)Regulation: Regulators.

                      (23)Non Returning : Check Valves.

                      (36)Relieving: Relief Valves, Safety Valves.

                      (49)Pilot-operated: Pilot-Operated Valves.

                      (49)E-Signal-Operated: Solenoid or Pilot Valves.

  (53)By Closure Element Shape:

                      (54)Gate Valves.

                      (68)Globe Valves.

                      (79)Ball Valves.

                      (88)Plug Valves.

                      (98)Diaphragm Valves.

                      (104)Pinch Valves.

                      (106)Butterfly Valves.

                      (110)Needle Valves.

(114)By Operating Method: (manual, Actuating).

(115)Actuators:

                    (115)Manual:(Simple, Hammer, Geared)Handwheel

                    (117)Automatic:       

                            (118) Pneumatic Actuator.

                            (124) Electro Mechanical Actuator.

                            (130) Electro Hydraulic Actuator.

 (133)Actuator Selection.

(136)Control System:(Control Signal, Electro Control).

(142) Valve Tests of API 598

اللهم اجعل هذا العلم صدقة جاريه لروح من أعده (212)

 

(156)Installation:

                            (157)Pre installation Inspection.

                            (158)Test Equipment.

                            (160)Installation Criteria.

                            (171)Commissioning.

(175)Routine Maintenance:

                           (178)Reconditioning Nozzles and Disks.

                           (182)Replacing Actuator Diaphragm.   

                           (185)Replacing Seat Rings.

                           (186)Grinding Of Valve seat.

                           (187)Adjusting The Stem Connector.

                           (191)Routine Maintenance Of Packing Box.

                           (194)Spare Parts.

(196)Trouble Shooting.

(203)Valve Selction.

(206)Engineering Of Flow Through Valves.

(212)Index.    


 

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