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KDL Series Linear Pneumatic Diaphragm Actuator
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KDL Series Linear Pneumatic Diaphragm Actuator

  
Categroy: Actuator 
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Product description

Application

KDL series linear actuators are high performance. high thrust diaphragm actuators of multi-spring type that are compact and light. When diaphragm actuator is pressured by supply airthe force is created to move the rod of thactuatoto a balanced positiowhich thforce of diaphragm pressure is equatthspring force, unbalance force of valve trim, anfriction force etc. For linear travel control valve or other linear travel equipments,KDL series actuators are suited for controand on-off.

 

 Features:

  • Excellent Linearity-Amolded diaphragm travels ia deep diaphragm casing, the effective area of diaphragm might changas it istroked. Molded diaphragms have less change in effective area; thus, offer excellent linearity.
  • High Thrust Capability - The molded diaphragm and cold stamping casallows high pressure supplyand provides   maximuthrust.
  • Long Service Life - Cold stamping caseand ductile iron parts provides increased stability, corrosion protection, and avoiding deformation undepressuroverload.
  • Cold Service Application -All sizes of KDLseries diaphragm actuators allow performance to -40℃ if required.
  • Reliable Connections - A split stem connection provides reliablthrust and easier assemble.
  • Compact & Light -With the multiplsprings and a high air  supply pressure, KDserieare much more compact and light as compared with conventional actuators.

Engineering data

Series KDL series
Type Multi-spring type
Size 220. 270. 350. 450. 550. 650
Stroke See Table 2
Output Type Linear travel
Function Spring to open (FO): Air to close
Spring to close (FC): Air to open
Output Thrust See the thrust table 1
Air Supply 300.340. 400 KPa.G
Spring Range 80-200. 120-300. 120-280 KPa.G
Air Connection 220,270, 350. 450: Rc1/4. 550. 650: Rc3/8. See page 11-18
Performance Hysteresis: with positioner. Less than 1.0% of full stroke
Linearity: with positioner. Less than ± 2.0% of full stroke
 The above hysteresis and linearity vary depending on the material of gland packing and balance seal ring for control valves.
Ambient Temperature Standard type : -10~+70°C
High temperature service (option): 0~+100°C
Low temperature service (option): -40~+40"C
Painting Color Red RAL3020 and other expoxy finishes is available.
Accessories Air-set. Positioner. Solenoid Valve, Booster relay. Air-valve. Lock-up valve. Speed controller. Relief valve. Limits wwitc. Positioner transmitter, etc.
Option Manual handwheel. Case and Yoke material. Travel stopper. Special air tube. Special air fitting. Low temperature service. High temperature service. Salty Environment proof. Non-standard painting, etc.

KDL Material of Main Parts

Diaphragm Case Carbon Steel
Diaphragm Closth embedded EPDM
Piston Rod A276-3CB
0-Ring NBR or VITON
Yoke φ220、270、350、450 Ductile Iron :Q450-10 
φ550、 650 A216-WCB
Bolts & Nuts Carbon steel with dacromet coating
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