Heated Ball Valves0 pages

W W W . M K S I N S T . C O M Vacuum Technology
Heated Ball Valves
MANUAL AND PNEUMATIC KF 40 & KF 50 VALVES
MKS is offering a ball valve designed to be heated and a heater designed specifi cally for the
MKS Ball Valve. Offered in KF40 & KF50 sizes,manual and pneumatic, the valves have been
designed such that the valve body and actuator are separated by an elongated actuator
shaft, thus allowing the entire valve to not only be heated, but insulated from heat loss. The
unique ball valve heater covers the entire valve body as well as the heatable stainless steel
fl ange clamps on each end of the valve body. Because the heater can now provide complete
coverage of the valve while protecting from heat loss, the temperature stability inside the
valve has been maximized.
Ball valves are made of a body, stem, ball, and end caps. The ball is sealed within the body
by end caps creating a vacuum tight central cavity. The valve is opened and closed by
turning the stem 90° back and forth (1/4 turn). The sealing seat for the ball wipes the ball
clean as it is opened and closed. This feature provides the “self-cleaning” action that makes
this valve robust in particle-rich effl uent streams. Pneumatic actuators are available.
Features & Benefi ts
• Available along with Series 46 & Series
48 heaters
• Heatable to 150°C (200°C intermittent)
• Valve designed for heated and
unheated use
• Manufactured from 316L stainless steel
• High conductance; straight through fl ow
Applications
MKS Ball Valves offer straight-through, un-impeded fl ow with a minimal valve body footprint.
Because of their unique design, ball valves are less sensitive than other vacuum valves to
particulate contamination and, therefore, are especially useful in ‘dirty’ vacuum applications.
For example, ball valves are almost always used to isolate scrubbers and traps downstream
of the rough pumping system.
• Particulate resistant ball/seat design
lengthens time between
maintenance cycles
• Vacuum rating of 1 x 10-8 torr
• “Fail Safe” air-to-open, spring-to-close
standard
• 80-120 psig operating air pressure