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Fluorine-lined pneumatic single seat control valve


Technical data

DN(mm)20253240506580100125150200250300

 Valve seat diameter
10121520253240506580100125150200250300
   Rated flow coefficientLinear1.82.84.46.91117.627.5446911017627544069010001600
 Equalperoentage1.62.5 46.310162540631001602504006309001440
    With actuator modelKA-2KA-3KA-4KA-5KA-6
 
Effective area of film
2803505609001400
Trip1016254060100
PN0.6MPa   1.0MPa   1.6MPa    2.5MPa  
 
mode of action
Air off type、Gas open

Signal range
20-100、40-200、80-240

Flow charactertics
Stright line type、Equal percentage
 
Inherent adjustable ratio
30:1

working temperature
-30℃—+150℃

 Gas pressure
0.14-0.4
 (Mpa)Allowable differential pressure
Without positioned
5.33.72.31.30.90.740.470.30.30.20.10.120.10.10.040.03

Belt positioned
6.46.45.53.0121.71.10.70.60.40.30.280.20.10.080.05
 

 

Main performance index


Item
   
Normal type control valve 

Medium temperature (soft graphite packing) or bellows sealed regulating valve


Without positionner

With positionner
 
Without positionner

With positionner

Base error(%)
±5±1±15±4
 
 Backlash<(%)
31103

Backlash<(%)
30.481
 
Initial-end Deviation <(%)

 
Air-to-open

Initial point
±2.5
±6

End point
±5±1±15
 

Air-to-close

Initial point
±5
±15

End point
±2.5
±6

Rated travel deviation<(%)
±2.5±2.5±6
Allowable leakage
Regulate type(L/h)
                                      10-4X rated capacity

Regulate shut-off type A 
 
Port Size(mm)
 20|25|40|50|65|80|100|150|200|250|300
    Soft seal:VI level

Rated flow coefficient deviation(%)
±10

Inherent flow characteristics deviation 
  符合IEC534-1976和GB/T13927中规定的斜率要求
Conform to the slope demand of IECC534-1976 and GB/T13927
可配附件电气定位器或电/气转换器、空气过滤减压器、电磁阀、手轮机构等
 


 Main parts materials

Parts Materrials
Valve body, bonnetHT200、ZG230-450、ZG0Cr18Ni9
Lining materialF46、F4、PFA、PO、PE、PP
Bellows materialPolytetrafluoroethylene(PTFE) (F4)
Spool material0Cr18Ni9
Thin film diaphragmNitrile rubber clip reinforced polyester plant
Packing, gasketPTFE, flexible graphite
spring60Si2Mn
Membrane coverA3
Valve stem, push rod2Cr13、0Cr18Ni9


 Main parts materials

PN10
Nominal diameterDiameter of membrane headStructure lengthFlange connection size(Gas on), (gas off)
DOLDD1D2fbZ-φdH
DN152851309565453164-φ14487
DN2028515010575553184-φ14487
DN2528516011585653184-φ14493
DN32285180140100783184-φ18524
DN40285200150110853184-φ18530
DN502852301651251003184-φ18538
DN653602901851451204188-φ18686
DN803603102001601354208-φ18706
DN1003603502201801554208-φ18726
DN1254704002502101854228-φ18969
DN1504704802852402105228-φ22969
DN2004706003402952655248-φ221009
DN25062073039535032052612-φ221353
DN30062085044540036852612-φ221390


PN16
Nominal diameterDiameter of membrane headStructure lengthFlange connection size(Gas on), (gas off)
DOLDD1D2fbZ-φdH
DN152851309565453164-φ14487
DN2028515010575553184-φ14487
DN2528516011585653184-φ14493
DN32285180140100783184-φ18524
DN40285200150110853184-φ18530
DN502852301651251003184-φ18538
DN653602901851451204188-φ18686
DN803603102001601354208-φ18706
DN1003603502201801554208-φ18726
DN1254704002502101854228-φ18969
DN1504704802852402105228-φ22969
DN20047060034029526552412-φ221009
DN25062073040535532052612-φ261353
DN30062085046041037052812-φ261390


Installation and use of matters needing attention

1. Pneumatic single-seat regulating valve should be installed vertically on the pipeline, and the larger volume and weight should be added with support and clamping when used in vibration occasions.


2. Pneumatic single-seat regulating valve should generally be installed with bypass piping, so that it can be switched to bypass operation when the diaphragm fails or is repaired, so that the production process can operate normally. The bypass line can be omitted for manual operation, and the valve opening can be limited. When the handwheel mechanism is stopped, it should be restored to the original neutral position to facilitate the normal operation of the automatic control system.


3. When cleaning the pipeline, the adjustment should be at the maximum opening in order to remove the dirt in the pipeline.


4. If the valve body is lined with an anti-corrosion layer, when installing on the pipeline, a corrosion-resistant soft pad should be used, and be careful not to damage the sealing surface of the valve body flange.


5. The packing gland should be checked regularly to prevent damage to other parts and accidents due to leakage and corrosion.