Description
Specifications
Keystone
Butterfly Valve F**0 Butterfly valve has a split, wafertype body,
feature a piece disc stem and field replaceable
seat.
Keystone is a recognized world leader in butterfly valves and
industrial process valves. Originally designing, patenting and
introducing the Butterfly Valve in ***1, Keystone developed a
strong reputation for reliability, quality and service. These
attributes have been nurtured by Tyco and have stayed with the
brand as the portfolio was increased to include the Keystone
pneumatic and electric actuators and controls which give our valve
packages seamless compatibility and the owners a single point of
contact for package responsibility. Also carrying the Keystone name
we designed and produce a range of knife gate valves and ball
valves. These products offer the customer the same solid
performance and low cost of ownership as our market leading
butterfly valve range.
Keystone F**0 T**0 Butterfly Valve Size: 2" 2.5"3" 4" 5" 6" 8" *0" *2" *4"
General Application
The gigure ******2/**3 is the ideal valve for use in the food and
beverage industries. The figure ******7 is PTFE lined for use
in semi-aggressive chemical industries. Max pressure 7 bar.
The gidure ******2 is rubber lined for use in the process
industries. Max pressure 7 bar.
Features
* Factory testing of eveery valve at full rating ensures **0%
bubble-tight shut-off
* standardized actuator flange for easy operator interchangeability
and mount direct to keystone range of actuators.
* one-piece wafer -thin disc-stem provides high strength and
absolutely positive disc control and gives the very minimum
obstruction in flow. is crevice free surface makes it ideal
for hygienic duty.
* Primary seat formed by the seat/shaft/hub contact exceeds
the pressure rating of the valve. Body is totally isolated
from the flowing medium.
*Secondary shaft seal is suitable for pressure and vacuum is self
adjusting.
*Patented dove-tail seat requires no bonding. Makes seat
replacement simple and fast. Extra heavy edge section resists
tearing
*Hub seal is provided by preloaded contact between flatted seat
surface and rounded polished disc-hub area for positive sealing at
all disc positions.
*Molded -in O-ring provides positive flange seating and eliminates
the need for gaskets.
*Heavy duty top bushing absorbs side thrust loads. Self-adjsuting
seating for both directions is also suitable for vacuum.
