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Rectangular Transfer Valve (Slit Valves) With Housing Cover


  • Plasma Etch, CVD, Sputter Deposition
  • Manufacturing of solar panels
  • Semiconductor processing
  • LCD/flat panel processes
  • All other cluster vacuum systems


  • Removable valve housing cover
  • Semi standard application (Semi E21-94, Semi E24-92, Semi E21.1-1296)
  • Patented L-motion link and dual shifts without springs in the actuator enable faster, smoother actuation with significantly reduced vibration
  • Dust seal on the vacuum side of the bonnet flange that virtually eliminates particulate from entering the bellows
  • Mechanical locking so at the end of gate travel the valve locks into position
  • Welded bellows actuator seal
  • Bonnet flange bolts are designed with retainers to eliminate bolts from falling out upon disassembly


  • Custom sizes available
  • Various o-ring compounds (Kalrez®, Chemraz®, etc.)

Specifications Table

Temperature (°C) Valve body: 150°C
Valve actuator: 80°C
Pressure Range (torr) 1 X 10-9 mbar - ATM
Differential Press (torr) ≤ 1.2 bar in either direction
Material Valve body, bonnet seal, gate: AL6061
Welded bellows: AM350
Valve actuator: SS 304, AL6061
Seal Material Fluorocarbon (option KALREZ, ETC)
Leak Rate (cc/sec) <1 X 10-9 mbar. l/s
Cycles Until Service (approx.) ≥ 2 million
Position Indicator Honeywell: 11SM-244-T, JS-5
Operation Double acting
Operation Double acting

Dimensional Drawings

Request A Quote
To request a quotation on a rectangular gate valve please start with our Rectangular Gate Valve Checklist.
Product Manual
For a download of the product manual, click here.
Contact Us
To speak with someone directly, please call 1-412-387-9200 or email international@lesker.com.