b43003000 - QSB250P, Single Pnuematic Operation

QSB250P, Single Pnuematic Operation

B43003000

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Overview

The QSB quarter swing valves are compact, quick acting, high conductance isolation valves. The QSB valves have a polished, stainless steel, ISO flanged body with fluoroelastomer ‘O’ ring sealed valve plate and shaft. The valve plate ‘O’ ring groove is vented to help maintain a stable high vacuum. The valve shaft ‘O’ rings and bearings are lubricated with Fomblin® grease to prevent gas bursts from behind the shaft seals.
 
This valve is supplied with a trapped ‘O’ ring.

Technology

The pneumatic operation valves each have microswitches to indicate when the valve is open or closed. The QSB250P valve has a single acting actuator to open the valve and a spring to close the valve. The actuator link of all pneumatic operation valves is enclosed by a safety cover. Electropneumatic control valves are available as optional.
 
Use 5-port control valves for the double acting actuator on the QSB63P, QSB100P and QSB160P valves and use 3-port control valves for the single acting actuator on the QSB250P valve.
b43002000 - QSB250 Quarter Swing Butterfly Valve, Manual Operation

QSB250 Quarter Swing Butterfly Valve, Manual Operation

B43002000
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b43003000 - QSB250P, Single Pnuematic Operation

QSB250P, Single Pnuematic Operation

B43003000
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List Price:
Web Price:
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Features and Benefits

  • Pneumatic operation
  • High conductivity
  • Resists atmosphere in either direction
  • Compact and quick acting
  • Corrosion resistant construction

Technical Data

Valve plate material AISI 304 stainless steel
Operating pressure range 10-9 - 3000 mbar
8 x 10-10 - 2250 Torr
Maximum pressure differential 1000 mbar / 750 Torr
Operating temperature range 5 - 40 °C
Maximum baking temperature 200 °C (without actuator)
Leak rate < 10-9 mbar l s-1
8 x 10-10 Torr l s-1
Reliability (MTTF) >1.5 x 105 cycles
Pneumatic connectors 1/8 in BSP, for 6 mm OD tube
Number of connectors 1
Microswitch rating 5 A at 48 V
Microswitch connectors Screwed connector
Flange Size ISO250
Conductance * 13000 l s-1
Pneumatic pressure
Recommended 4 to 6 bar
58 to 87 psi
Minimum 3.8 bar
55 psi
Maximum 7 bar
101.5 psi

 
* Conductance of equivalent tube length

Dimensions

A B C E F G H I J K ØL
mm 335 250 12 242 215 57 104.5 95.5 - - 310
Inches 13.07 9.75 0.47 9.44 8.39 2.22 4.08 3.72 - - 12.09

 1   Actuator cylinder support bracket (QSB63P, QSB100P and QSB160P only)