Models Available:
Technical Advantages:
Suspended Diaphragms (U.S. Patent # 6,295,918)
Diaphrams in White Knight FacilitatorTM pumps are machined from solid blanks of PTFE. This allows thickness of the diaphragm to taper to a flexible thickness so that standard particle traps found between a film type diaphragm and its mating surface are eliminated. This is particularly advantageous when pumping abrasive slurries. Film type diaphragms typically and eventually "Cookie Cut" around their wet perimeter as the diaphragms are forced to bend back and forth over abrasive particles that become trapped between film of flexible thickness. Diaphragms in the FacilitatorTM are also machined in a convex shape and remain in the convex shape throughout the cycle. This means that the diaphragm is never to undergo the stress of being turned "inside out" adding flex life to diaphragms used in the FacilitatorTM. Also, with diaphragms solidly fastened to the shaft, no push plates are used that rub against diaphragm surfaces causing particle generation.
Reduced Pressure Shifting (Patent Pending)
As air operated reciprocating pumps are used in high head pressure applications, one of the problems faced is that the shifting mechanisms used throughout the air system have typically been "hammered" by the same pressure required to supply the pump with its driving air pressure. The FacilitatorTM allows for one source of air to run and shift the pump in pressure up to 60 psi. Above 60 psi, a secondary air source is used to shift the pump so that lower pressure can be used for shifting, thereby preserving the fragile flouropolymer parts within the pneumatic areas of the pump.
Wear Friendly Check Valves (Patent Pending)
In combining chemical distribution and slurring pumping into one pump, challenges are faced with using the right check valve for the right application. Chemical delivery check valves are designed for maximum suction lift but even seemingly small amounts of wear render them useless. Check valves used in slurry applications are designed to function even after large amounts of abrasive wear caused by the slurry occur, but they are typically poor for suction lift. White Knight has developed a check valve that uses a typical high suction lift check valve seat as the primary seal. In the event that the pump is used for chemical delivery, the primary check seat is designed to continue on through the warranty period. When a FacilitatorTM is used in slurry, the primary check seat quickly wears away, and the secondary seal that is designed to function even after large amounts of wear takes over.
The White Knight AP EXT Series pumps are constructed from 100% PTFE and PFA in the liquid path. The air side does contain a ceramic sleeve and spool and some polypropylene. AP EXT Series pumps are capable of pumping liquids at a constant or thermal cycling 100º Celsius. The AP EXT Series pumps are simply AP Series pumps which have reduced liquid orifice for the purpose of reducing the speed of the pump thereby lengthening time between re-builds
Features:
· One Year no cycle or time warranty in any slurry
· 18' of dry suction lift
· Low particle counts due to no wet shaft, no push plates, and all wet
surfaces constructed from PTFE co-polymers.
· One pump for chemical or slurry delivery.
· Up to 100 psi operation.
· Back pressure capable up to and including "dead head."
· Low shear due to unique diaphragm construction.
· No maintenance.*
· No lubrication.
· No metal parts.
· No o-rings.
· Electronic monitoring and leak detection optional.
· Capable of running from non-White Knight shifting controls
(controllable from PLC with customer's valves).
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